Industrial Seal Guide and FAQ

All your industrial sealing questions, answered in one place.

EPM | Industrial Sealing Solutions

Industrial Seals, Gaskets & Custom Manufacturing FAQs

Your questions about industrial seals answered by EPM. Explore hydraulic and pneumatic seals, custom manufacturing, reverse engineering, sealing materials, O-rings, gaskets, replacement seals, and emergency seal services. Find technical information and learn how EPM can help with your next sealing requirement.

How Can EPM Help With Your Industrial Sealing Needs?

EPM, Inc. supplies industrial seals, gaskets, O-rings, and custom sealing products to manufacturing plants and industrial customers. From standard replacement seals to custom-engineered components, EPM helps customers identify, source, and manufacture sealing products for a wide variety of equipment and applications.

With standard products, custom manufacturing, reverse engineering, and emergency service, EPM offers several ways to address difficult sealing requirements. Customers can work with EPM to evaluate a sealing problem, identify a replacement, or investigate a custom solution. Browse the frequently asked questions below or contact EPM directly for help identifying a product.

Explore the complete EPM industrial sealing product catalog.

EPM Products, Capabilities & Services

What types of industrial seals and gaskets does EPM supply?

EPM supplies a broad range of industrial sealing products, including standard and custom hydraulic seals, pneumatic seals, oil seals, PTFE seals and parts, O-rings, mechanical seals, gaskets, molded rubber products, and extruded rubber components.

EPM also offers seal kits, pump and valve packing, and reverse-engineering services for customers who need a replacement or custom-manufactured component.

Whether you know the exact part number or only have an existing sample, EPM can help you determine the next step and identify potential sealing solutions for your equipment.

Browse EPM Products →
What makes EPM different from other industrial seal suppliers?

EPM combines industrial sealing product knowledge with custom manufacturing, reverse engineering, and personalized technical support. Rather than limiting customers to off-the-shelf products, EPM can help investigate alternatives when a standard seal is unavailable or does not meet the requirements of an application.

EPM also offers international shipping and its Seal 911 emergency service for urgent after-hours requirements. Customers can work with EPM specialists to identify products using part numbers, measurements, drawings, or physical samples.

Related EPM Resource Learn More About EPM →
Does EPM supply both standard and custom industrial seals?

Yes. EPM supplies standard sealing products as well as custom-manufactured seals and gaskets. Standard products are often the most straightforward choice when an existing profile and material meet the application's requirements.

Custom manufacturing through EPM may be appropriate when dimensions, material specifications, equipment requirements, or an obsolete part make a standard replacement unsuitable. EPM can help evaluate whether a standard product or a custom-manufactured component is the better fit.

Explore Standard & Custom Hydraulic Seals →
Related EPM Article Standard or Custom Seals →
What industries does EPM serve?

EPM supplies sealing products to manufacturing plants and industrial customers across a range of applications. Seals and gaskets are used in equipment such as hydraulic and pneumatic cylinders, pumps, valves, mixers, and production machinery.

EPM's product range supports customers with different equipment designs and operating requirements. The most suitable sealing product depends on the machine, operating conditions, and the material being sealed.

Customers can contact EPM with details about their equipment and application to discuss available product options.

Learn More About EPM →
Can EPM help identify a seal if I don't know the manufacturer or part number?

Yes. EPM can help identify sealing products using physical samples, measurements, photographs, drawings, and equipment information. An original manufacturer part number is useful but is not always necessary to begin the identification process.

EPM asks customers to provide as much application information as possible. This helps the team evaluate the dimensions, material, operating conditions, and type of movement involved.

If you are unsure what information to provide, EPM can help you work through the details needed to identify a potential replacement.

Submit Your Seal Information to EPM →

Hydraulic Seals & Cylinder Applications

What are hydraulic seals used for?

Hydraulic seals prevent pressurized hydraulic fluid from escaping equipment and help keep foreign materials from entering hydraulic systems. They are essential components in hydraulic cylinders and other fluid-power equipment.

EPM supplies hydraulic sealing products for applications involving reciprocating and rotary movement, as well as static sealing requirements. EPM's product range includes several common hydraulic seal types and configurations.

Explore EPM Hydraulic Seals →
What is the difference between a hydraulic rod seal and a piston seal?

A rod seal is installed in the cylinder head or gland and seals against the moving piston rod. Its purpose is to prevent hydraulic fluid from leaking out of the cylinder.

A piston seal is installed on the piston and seals against the cylinder bore. It prevents fluid from bypassing the piston as the cylinder operates.

EPM supplies both rod and piston sealing profiles in different sizes and materials. Selecting the right profile depends on the cylinder design and operating conditions.

View EPM Hydraulic Seal Profiles →
What is a hydraulic wiper seal and why is it important?

A hydraulic wiper, also called a scraper, dust seal, or excluder, helps remove dirt and contaminants from a moving piston rod as it enters the cylinder.

Wipers help protect the hydraulic system by reducing the amount of external contamination that enters the cylinder. They are an important part of an overall sealing arrangement, although a conventional wiper is not intended to replace the primary pressure-retaining rod seal.

EPM supplies hydraulic wipers and other cylinder sealing products to help customers maintain their hydraulic equipment.

Explore EPM Hydraulic Seals →
What is the purpose of a hydraulic wear ring or guide ring?

Wear rings guide the piston or rod within a hydraulic cylinder. They help prevent metal-to-metal contact, maintain alignment, and absorb transverse loads.

By helping guide moving components, wear rings protect cylinder surfaces and support the performance of the overall sealing arrangement.

EPM supplies wear rings in different sizes and configurations. EPM can help customers identify the appropriate replacement based on cylinder dimensions and application requirements.

View EPM Hydraulic Sealing Products →
What causes hydraulic cylinder seals to fail?

Hydraulic seals can experience premature wear or failure for several reasons. Common contributing factors include:

  • Incorrect material selection.
  • Excessive pressure or temperature.
  • Contamination in the hydraulic fluid.
  • Damaged or improperly finished rod surfaces.
  • Incorrect installation or seal dimensions.
  • Misalignment or excessive side loading.
  • Normal wear over extended operating cycles.

EPM recommends considering the complete application when selecting a replacement. A replacement seal should address the conditions that contributed to the original failure. EPM can help evaluate seal type, material, and profile requirements before a replacement is selected.

Related EPM Resource Explore EPM's Sealing Technical Articles →
Can EPM manufacture replacement seals for older hydraulic cylinders?

EPM can help identify and source replacement sealing products for older equipment. When an original seal is no longer available, reverse engineering may provide another option.

Customers can provide an existing seal, drawing, dimensions, or equipment information to begin the process. EPM can evaluate the available information and discuss potential replacement options.

Learn About EPM Reverse Engineering →

Send EPM Your Application Details →

Why does my hydraulic cylinder keep leaking?

A hydraulic cylinder can leak when its sealing components become worn, damaged, improperly installed, or incompatible with the operating conditions.

Common causes include:

  • Worn or damaged rod seals.
  • Scratched or improperly finished piston rods.
  • Excessive operating pressure.
  • Incorrect seal dimensions or material.
  • Contamination within the hydraulic system.
  • Rod misalignment or excessive side loading.

Replacing the seal may resolve the problem, but identifying the underlying cause is important to avoid repeat failures. EPM supplies hydraulic rod seals, piston seals, wipers, wear rings, and other sealing components. EPM can also help investigate replacement options when the original seal is difficult to identify.

Explore EPM Hydraulic Seals →
Why do hydraulic cylinder seals fail prematurely?

Premature hydraulic seal failure can result from incorrect material selection, unsuitable seal geometry, excessive pressure, temperature extremes, contamination, or problems with the cylinder itself.

Installation conditions are another important consideration. Damaged sealing edges, incorrect groove dimensions, and improper installation can reduce seal life.

When selecting a replacement, evaluate the entire sealing arrangement rather than simply installing another seal with the same dimensions. EPM can help review the application and identify a suitable replacement profile or material.

Discuss Hydraulic Seal Failure With EPM →
How do I find the correct replacement seal for a hydraulic cylinder?

Start by identifying the cylinder manufacturer, model number, bore diameter, rod diameter, and existing seal dimensions. If the original seal kit part number is available, include that information as well.

Determine whether you need a rod seal, piston seal, wiper, wear ring, O-ring, or a complete cylinder seal kit. Operating pressure, temperature, hydraulic fluid, and cylinder movement also affect material and profile selection.

EPM supplies standard and custom hydraulic sealing products and can help identify replacement options when OEM documentation is unavailable. Providing EPM with measurements, photographs, or an existing sample can help narrow down the correct replacement.

View EPM Hydraulic Sealing Products →
What causes hydraulic seal extrusion and how can it be prevented?

Hydraulic seal extrusion occurs when sealing material is forced into the clearance gap between mating components under pressure. This can damage the seal and eventually lead to leakage.

Contributing factors include excessive pressure, large extrusion gaps, inadequate material strength, elevated temperatures, and unsuitable seal geometry.

Potential solutions may include:

  • Selecting a material with appropriate mechanical properties.
  • Reviewing the cylinder's extrusion gap and tolerances.
  • Using an appropriate backup ring where required.
  • Checking operating pressure and temperature.
  • Evaluating the seal profile for the application.

EPM offers hydraulic seals and custom manufacturing options to help address demanding sealing requirements. EPM can review the application details to help determine whether a different material, profile, or supporting component may be appropriate.

Ask EPM About Hydraulic Seal Extrusion →

Pneumatic Seals, Oil Seals & Mechanical Seals

What are pneumatic seals used for?

Pneumatic seals are used in equipment powered by compressed air or gas. They help maintain pressure within pneumatic cylinders, actuators, and other air-powered machinery.

Pneumatic sealing applications can involve high operating speeds, making friction, wear, material selection, and sealing geometry important considerations.

EPM supplies pneumatic sealing products for a variety of industrial applications and can help customers identify suitable replacements for existing pneumatic equipment.

Browse EPM Products →
Can hydraulic seals and pneumatic seals be used interchangeably?

Not automatically. Hydraulic and pneumatic systems operate under different conditions. Hydraulic systems generally use pressurized liquids, while pneumatic systems use compressed air or gas.

Differences in pressure, lubrication, speed, friction, and material requirements mean that a seal designed for one system may not be suitable for another.

EPM can help evaluate the operating conditions before selecting a replacement, including the type of movement, media, pressure, and temperature involved.

Discuss Your Application With EPM →
What is an oil seal and where is it used?

An oil seal, often called a rotary shaft seal, is designed to retain lubricants and help prevent contaminants from entering equipment around a rotating shaft.

Oil seals are commonly used in gearboxes, motors, pumps, industrial machinery, and rotating equipment.

EPM supplies oil seals for industrial applications. Proper selection depends on shaft dimensions, speed, temperature, lubrication, and the operating environment. EPM can help customers identify a suitable replacement using part numbers, measurements, or application details.

Explore EPM Sealing Products →
What is the difference between an oil seal and a hydraulic rod seal?

An oil seal is generally designed to retain lubricant around a rotating shaft. A hydraulic rod seal is designed to retain pressurized fluid around a reciprocating rod.

Although both products prevent leakage, they are designed for different types of motion and operating conditions. Their profiles and material requirements should be matched to the specific application.

EPM supplies sealing products for both rotary and reciprocating applications. When choosing between replacement products, EPM can help evaluate the type of movement and operating conditions involved.

Contact EPM About Your Sealing Application →
What are mechanical seals used for in pumps?

Mechanical seals are used to control leakage where a rotating shaft passes through a stationary pump housing. They are commonly found in pumps and other rotating equipment.

Mechanical seals use closely controlled sealing faces and other components to maintain a sealing interface during operation.

EPM includes mechanical seals in its industrial sealing product range. Customers can contact EPM with pump information and existing seal details when sourcing a replacement.

Browse EPM Products →
How do I identify and replace seals in pneumatic equipment?

Identifying pneumatic seals begins with determining the type of equipment and the sealing location. Pneumatic cylinders and actuators may contain piston seals, rod seals, wipers, O-rings, and other components.

Record the cylinder manufacturer, model, bore size, rod diameter, and original seal dimensions. Also consider operating pressure, air quality, speed, temperature, and lubrication requirements.

Replacement materials and profiles should be selected specifically for pneumatic operation rather than assuming a hydraulic seal will be suitable. EPM can help customers identify replacement pneumatic seals using equipment details, measurements, or existing samples.

Contact EPM About Pneumatic Seals →

Custom Seals, Reverse Engineering & Manufacturing

Can EPM manufacture a custom seal if a standard replacement is unavailable?

Yes. EPM offers custom sealing solutions for applications where standard products do not meet the required dimensions, material specifications, or equipment requirements.

EPM can work from a physical sample, sketch, drawing, mockup, or application information to investigate a suitable custom-manufactured replacement. This can be especially useful for obsolete parts and unusual sealing requirements.

Explore EPM Custom Manufacturing & Reverse Engineering →
Related EPM Article Seals – To Customized or To Purchase →
What is reverse engineering for industrial seals?

Reverse engineering is the process of examining an existing component to determine its dimensions, design, and material requirements so that a replacement or improved version can be developed.

For industrial seals, this can be especially useful when original parts are obsolete, difficult to source, or available only at a high cost.

EPM can begin with a physical sample, drawing, sketch, or mockup and develop prototype parts for inspection and approval. This gives customers another route to investigate when original replacement parts are unavailable.

Learn More About EPM Reverse Engineering →
Can EPM reproduce a seal from a physical sample?

Yes. A physical sample can provide useful information about the original component's shape, dimensions, construction, and material.

EPM uses available samples and application information to evaluate replacement possibilities. If the original sample is worn or damaged, additional measurements, drawings, or equipment details can help with the process.

EPM can use this information to investigate whether a suitable replacement can be manufactured. Customers can send photographs or provide sample information through EPM's contact form.

Submit a Sample Inquiry to EPM →
What manufacturing methods can EPM use for custom seals and gaskets?

EPM's reverse-engineering and manufacturing capabilities include several production methods, depending on the component and application:

  • Machining.
  • Molding.
  • Stamping.
  • Die cutting.
  • Waterjet cutting.
  • Forming and assembly.

The appropriate manufacturing method depends on the part geometry, material, quantity, and required specifications. EPM evaluates these factors when determining an appropriate manufacturing approach for a custom sealing project.

Explore EPM Manufacturing Services →
What sizes of seals can EPM manufacture?

EPM's published CNC seal machining capabilities include inch sizes ranging from 1/64 inch to 60 inches and metric sizes ranging from 1 mm to 1,500 mm.

Actual manufacturing feasibility depends on the material, profile, dimensions, and design requirements. EPM can review your specifications to determine whether the required component falls within its manufacturing capabilities.

Related EPM Article EPM Machining of Hydraulic Seals →
Can EPM manufacture prototypes before a full production order?

Yes. EPM's reverse-engineering service can include prototype samples for customer inspection and approval before production.

Prototype development can be useful when a component has unusual dimensions, a new design, or specific performance requirements that need to be evaluated.

EPM can discuss the available prototype and production options after reviewing the part design, material, and application requirements.

Discuss a Prototype With EPM →
When do you need a custom seal instead of a standard seal?

A custom seal may be necessary when a standard product cannot meet the application's dimensions, profile, material, or performance requirements.

Common reasons for considering custom manufacturing include:

  • Nonstandard or unusual dimensions.
  • Discontinued or obsolete OEM parts.
  • Special material requirements.
  • Unique equipment configurations.
  • Specific operating conditions.
  • Standard products that do not provide a suitable fit.

EPM offers both standard sealing products and custom manufacturing solutions, allowing customers to investigate different approaches. EPM can help determine whether an available standard product is suitable or whether a custom component should be considered.

Related EPM Article Seals – To Customized or To Purchase →
Can a custom industrial seal replace an OEM part?

A custom-manufactured industrial seal may be used as a replacement for an OEM component when the replacement has been properly evaluated for the application.

Important considerations include dimensional compatibility, material properties, pressure, temperature, media, movement, and installation requirements.

Reverse engineering can help establish the design of an existing component and investigate a suitable replacement. EPM provides custom manufacturing and reverse-engineering services for customers seeking alternatives to original equipment parts.

Learn About EPM Reverse Engineering →
What information is needed to request a custom seal quote?

To request a custom seal quotation from EPM, provide as much information about the part and application as possible.

  • Part dimensions and profile drawing.
  • Material requirements, if known.
  • Equipment manufacturer and model.
  • Operating pressure and temperature.
  • Fluid or media being sealed.
  • Type of movement and operating speed.
  • Required quantity.
  • Required delivery date.

A physical sample, photograph, or existing technical drawing can also be helpful. EPM uses S.T.A.M.P.S. application information to help evaluate sealing requirements and determine the appropriate next steps.

Request a Custom Seal Quotation From EPM →
Can you order custom industrial seals in low volumes or as one-off parts?

Custom manufacturing can be particularly useful when a customer needs a replacement component in a small quantity or when a standard catalog product is unavailable.

Depending on the part geometry, material, and manufacturing method, a custom seal may be produced as a prototype, individual replacement, or production run.

EPM offers custom manufacturing and reverse engineering for specialized sealing requirements. The feasibility and economics of a one-off or low-volume order depend on the specific component, and EPM can review those details with you.

Ask EPM About Low-Volume Custom Seals →
How much does a custom industrial seal cost and what affects lead time?

The cost and lead time of a custom industrial seal depend on several factors, including dimensions, material, profile complexity, manufacturing method, quantity, and availability of raw materials.

Additional considerations may include reverse-engineering work, prototype development, inspection requirements, and expedited production or shipping.

Providing EPM with a drawing, sample, quantity, and delivery deadline helps the team evaluate the project and provide more accurate pricing and lead-time information.

EPM advertises same-day manufacturing and shipping options for qualifying requirements. Availability and applicable fees should be confirmed directly.

Request Pricing and Lead-Time Information →

Seal Materials, PTFE & Chemical Compatibility

What materials does EPM offer for industrial seals?

EPM's published material range includes several elastomers, plastics, and engineered materials. Examples include:

  • Nitrile (Buna-N).
  • FPM / FKM fluorocarbon.
  • PTFE.
  • Polyurethane.
  • EPDM.
  • Silicone.
  • Acetal (POM).
  • Nylon and other engineered materials.

The appropriate material depends on the operating temperature, pressure, media, movement, and other application requirements. EPM can help customers evaluate these factors when identifying a replacement or specifying a custom sealing product.

Explore EPM Products →
What is PTFE and why is it used in industrial seals?

PTFE, or polytetrafluoroethylene, is a fluoropolymer known for its low friction, broad chemical resistance, and useful temperature capabilities.

PTFE is used in sealing applications where low friction and resistance to many chemicals are important. Different PTFE compounds can be reinforced with fillers to change mechanical and wear properties.

EPM supplies PTFE seals and parts for industrial applications. EPM can help customers explore PTFE components when chemical compatibility, friction, or operating conditions make the material a potential choice.

Browse EPM PTFE Products →
More Technical Information Read EPM's Technical Articles →
What is the difference between Buna-N and Viton?

Buna-N, also called nitrile or NBR, is commonly used in sealing applications involving many petroleum-based oils and fuels.

Viton is a trade name commonly associated with FKM fluoroelastomers. FKM materials are often selected for applications requiring resistance to elevated temperatures and many chemicals.

Neither material is universally suitable for every fluid or operating condition. The exact compound and application should be evaluated before selection. EPM can help customers compare material requirements when sourcing a replacement seal.

Related EPM Resource Explore EPM's Material Articles →
How do I choose the right seal material for chemicals or aggressive fluids?

Chemical compatibility is one of the most important factors in seal material selection. A material that performs well with one fluid may swell, deteriorate, or lose its sealing properties when exposed to another.

EPM recommends evaluating:

  • The exact chemical or fluid being sealed.
  • Operating temperature.
  • Operating pressure.
  • Exposure duration.
  • Static or dynamic movement.
  • Any relevant industry or material specifications.

EPM's team can use this information to help investigate suitable materials for your application. Providing the exact media and operating conditions helps EPM narrow down potential material options.

Ask EPM About Material Selection →
What is polyurethane and why is it used for hydraulic seals?

Polyurethane is an elastomer frequently used in hydraulic sealing applications because of its abrasion resistance, mechanical strength, and wear characteristics.

It is commonly used for piston seals, rod seals, and other dynamic sealing components. The specific polyurethane formulation must still be matched to the temperature, fluid, and operating conditions.

EPM supplies hydraulic sealing products in different materials and can help customers evaluate whether polyurethane is appropriate for their particular cylinder or hydraulic application.

Explore EPM Hydraulic Seals →

O-Rings, Gaskets, Seal Kits & Specialty Products

What is an O-ring and what is it used for?

An O-ring is a circular elastomeric sealing component with a round cross-section. It is compressed between mating surfaces to create a seal and prevent fluid or gas leakage.

O-rings are used in hydraulic and pneumatic systems, pumps, valves, industrial machinery, and many other applications.

EPM supplies O-rings in different sizes and materials. The correct selection depends on the groove dimensions, compression requirements, media, and operating conditions. EPM can help customers identify a suitable O-ring for new equipment or replacement requirements.

Browse EPM O-Ring Products →
How do I determine the correct O-ring size?

O-ring sizing generally involves determining the inside diameter and cross-section of the ring. Groove dimensions are also important when checking whether a particular O-ring is suitable.

EPM provides an O-Ring Handbook as a technical resource for customers working with O-ring sizing and identification. Customers can also contact EPM for assistance when trying to identify an existing O-ring or source a replacement.

Find the EPM O-Ring Handbook →
Related EPM Resource Read EPM's O-Ring Technical Articles →
What are industrial gaskets used for?

Industrial gaskets create a seal between two stationary mating surfaces. They help prevent fluids or gases from escaping through the joint.

Gaskets are used in pumps, valves, piping systems, processing equipment, machinery, and many other industrial applications.

EPM supplies gaskets and gasket materials, including products for custom sealing requirements. EPM can help customers investigate gasket options based on dimensions, material, and operating conditions.

Explore EPM Gaskets & Materials →
Can EPM supply custom-cut gaskets?

EPM's reverse-engineering service includes die-cut, waterjet-cut, and other custom gasket manufacturing options, depending on the part and material.

Customers can provide a drawing, existing gasket, dimensions, or sample to begin evaluating a replacement. EPM can use this information to investigate a suitable custom gasket solution.

Explore EPM Custom Gasket Services →

Submit a Gasket Inquiry →

What is the purpose of a hydraulic or pneumatic seal kit?

A seal kit contains the sealing components needed for servicing or rebuilding a piece of equipment. Depending on the application, a kit may include rod seals, piston seals, wipers, O-rings, wear rings, and other components.

EPM supplies hydraulic and pneumatic cylinder seal kits and can assist with identifying the required components from equipment information or existing parts. Providing the cylinder model or original kit number can help EPM identify the appropriate replacement.

Explore EPM Seal Kits →
Does EPM supply molded and extruded rubber products?

Yes. Molded and extruded rubber products are included in EPM's industrial product range. These components can be used in applications requiring specific shapes, profiles, dimensions, and material properties.

EPM's reverse-engineering service also covers custom rubber parts and rubber-to-metal components. Customers can contact EPM with a sample, drawing, or description of the part they need.

Browse EPM Products →
How do I identify a replacement gasket without a part number?

A replacement gasket can often be identified through its dimensions, material, thickness, shape, and installation location.

If the original gasket is available, document its overall dimensions, bolt-hole locations, internal openings, and material characteristics. A photograph or drawing can help clarify its shape.

It is also important to identify the equipment, mating surfaces, pressure, temperature, and media involved. EPM supplies industrial gaskets and offers custom gasket manufacturing for applications where standard products are not suitable. EPM can help assess the information you have and discuss possible replacements.

Send EPM Your Gasket Identification Request →
How do I identify the correct oil seal for my equipment?

Identifying an oil seal generally requires the shaft diameter, housing bore diameter, seal width, and information about the application.

Other important factors include shaft speed, operating temperature, lubricant type, pressure, and exposure to external contaminants.

Oil seals are available in different configurations and materials. Selecting the correct replacement requires matching the seal design to the equipment and operating conditions.

EPM can help customers investigate replacement options using measurements, photographs, or original part information. Providing these details helps EPM determine what replacement products may be suitable.

Contact EPM About Replacement Oil Seals →
Why does my oil seal keep leaking?

Repeated oil seal leakage can indicate that the problem extends beyond the seal itself. Common causes include worn shafts, damaged sealing surfaces, incorrect seal dimensions, improper installation, and unsuitable materials.

Operating conditions can also contribute to leakage, particularly excessive shaft speed, elevated temperatures, pressure, and incompatible lubricants.

When replacing an oil seal, inspect the shaft and housing as well as the sealing component. EPM can help identify an appropriate replacement oil seal and evaluate alternative materials or configurations based on the operating conditions.

Discuss Recurring Oil Seal Leakage With EPM →
How do I choose the right gasket material for industrial applications?

Choosing the correct gasket material requires understanding the operating environment and the requirements of the joint being sealed.

Important factors include:

  • Fluid or chemical compatibility.
  • Operating temperature.
  • Operating pressure.
  • Required compression and recovery.
  • Surface finish of mating components.
  • Environmental exposure.

Different gasket materials offer different mechanical and chemical properties. EPM supplies gasket products and materials and can help customers investigate suitable options based on their application requirements.

Ask EPM About Gasket Material Selection →
How do I source replacement mechanical seals for industrial pumps?

When sourcing a replacement mechanical seal, start with the pump manufacturer, model number, and original seal part number if available.

Additional information may include shaft diameter, seal arrangement, operating pressure, temperature, fluid, speed, and the pump's operating environment.

If original documentation is unavailable, photographs, drawings, and a physical sample may help identify the existing assembly.

EPM includes mechanical seals in its industrial sealing product range and can assist customers with replacement inquiries. Contact EPM with the pump details and available seal information to discuss potential options.

Explore EPM Industrial Sealing Products →

Seal Identification & Replacement

How do I identify a replacement seal without a part number?

You do not necessarily need an original manufacturer part number to identify a replacement industrial seal. Existing seals can often be identified using physical measurements, photographs, drawings, or information about the equipment in which they are installed.

Start by documenting the seal's inside diameter, outside diameter, cross-section, overall profile, and material if known. Equipment manufacturer, model number, and application details can also help narrow down the possibilities.

EPM helps customers identify replacement hydraulic seals, pneumatic seals, O-rings, gaskets, and other industrial sealing products, even when original part numbers are unavailable. EPM can review the details you have and help determine what information is still needed.

Send EPM Your Seal Identification Request →
Can a seal supplier identify a replacement from a photo or sample?

Yes. A photograph or physical sample can provide valuable information when identifying an industrial replacement seal. A clear photograph showing the complete seal, its profile, and any visible markings can help with the initial identification process.

A physical sample is especially useful because it allows dimensions, cross-sectional geometry, and material characteristics to be evaluated. If the original seal is worn or damaged, additional measurements and equipment information may be necessary.

EPM works with customers to identify existing sealing products and investigate replacement options. You can provide EPM with photographs, sample information, and details about the equipment where the seal is used.

Submit a Photograph or Sample Inquiry to EPM →
How do I find the right replacement seal for my equipment?

Finding the correct replacement seal requires more than matching its general shape. The replacement must be compatible with the equipment dimensions, operating conditions, and material requirements.

Important considerations include:

  • Equipment manufacturer and model.
  • Seal dimensions and profile.
  • Operating pressure and temperature.
  • Fluid, chemical, or media compatibility.
  • Rotary, reciprocating, or static movement.
  • Operating speed and expected service conditions.

EPM supplies standard and custom industrial sealing products and can help customers investigate replacement options when an exact part number is unavailable. EPM can also help determine whether a standard product or custom replacement is worth considering.

Explore EPM's Industrial Sealing Products →
How do I measure a seal for replacement?

Accurate measurements are essential when sourcing a replacement seal. Depending on the seal type, measurements may include the inside diameter, outside diameter, cross-section, height, width, and other profile dimensions.

For hydraulic seals, it is also important to understand the dimensions of the installation groove, rod, piston, or cylinder bore. Measuring only the worn seal may not provide enough information to establish the correct replacement dimensions.

Whenever possible, provide EPM with measurements of the original seal and the equipment in which it operates. Photographs and drawings can also help clarify the required profile. EPM can use these details to help investigate a suitable replacement.

Ask EPM for Help Identifying Your Seal →
What information is needed to identify and source a replacement seal?

The more information available, the easier it is to evaluate a replacement sealing product. EPM uses the S.T.A.M.P.S. approach to help customers communicate important application requirements.

  • Size: Inside diameter, outside diameter, cross-section, and other relevant dimensions.
  • Temperature: Minimum and maximum operating temperatures.
  • Application: Equipment type and movement.
  • Media: Fluid, chemical, or material being sealed.
  • Pressure: Operating pressure.
  • Speed: Operating speed or shaft speed.

Also provide the equipment manufacturer, model number, original part number, required quantity, and photographs if available. EPM can use this information to help identify potential replacement products.

Submit Your Replacement Seal Requirements to EPM →

Obsolete & Hard-to-Find Seals

Where can I find seals for discontinued or obsolete equipment?

Finding replacement seals for discontinued machinery can be challenging, particularly when the original manufacturer no longer supplies replacement parts or technical documentation.

Industrial seal suppliers with custom manufacturing and reverse-engineering capabilities can offer an alternative to sourcing an original OEM component.

EPM helps customers identify and investigate replacements for hard-to-find sealing products. An existing sample, drawing, photograph, or equipment information can be used to begin the process. EPM can then evaluate potential standard or custom replacement options.

Explore EPM Reverse-Engineering Services →
How do I replace an obsolete seal when the original is no longer available?

When an original seal is discontinued, the first step is to establish its dimensions, profile, material, and operating requirements. A suitable replacement may be available as a standard product, or a custom- manufactured alternative may be necessary.

Reverse engineering can help reproduce an obsolete component using an existing sample, technical drawing, or equipment specifications.

EPM offers custom sealing solutions and reverse- engineering services to help customers address difficult replacement requirements. EPM can review the available information and discuss whether a replacement can be sourced or manufactured.

Contact EPM About an Obsolete Seal →
Can a replacement seal be manufactured from an existing sample?

Yes. An existing seal can provide the starting point for developing a replacement. The original component can be evaluated to establish its dimensions, profile, and other design characteristics.

If the original is worn, damaged, or distorted, additional information about the installation and operating conditions is important. Material selection must also account for the application rather than simply reproducing the original material without evaluation.

EPM's reverse-engineering services can help investigate custom replacement seals using physical samples, drawings, or other available information. EPM can also discuss the information needed to evaluate a potential replacement.

Learn About EPM Reverse Engineering →
How does reverse engineering help replace obsolete industrial seals?

Reverse engineering allows a replacement component to be developed when an original manufacturer's part is unavailable. Instead of relying entirely on an obsolete part number or discontinued product catalog, the existing component can be evaluated and reproduced.

The process may involve:

  • Examining an original seal or physical sample.
  • Establishing dimensions and profile geometry.
  • Evaluating the original material and application.
  • Developing a replacement design.
  • Manufacturing a prototype for inspection.
  • Moving forward with production when approved.

EPM provides reverse-engineering services for customers who need replacements for difficult-to-source industrial components. EPM can work from available samples, drawings, and application information to investigate a suitable replacement.

Explore EPM's Reverse-Engineering Capabilities →
Custom seal vs. standard seal: Which is best for hard-to-find replacements?

A standard seal is often the most practical solution when an existing product matches the equipment dimensions, material requirements, and operating conditions.

A custom seal may be more appropriate when the original profile is unusual, the equipment is obsolete, the dimensions are nonstandard, or a standard replacement does not provide the required performance.

EPM supplies standard sealing products and offers custom manufacturing options. EPM can help customers compare these approaches based on the application, availability, quantity, and cost considerations.

Related EPM Article Seals – To Customized or To Purchase →

Seal Failure & Troubleshooting

What causes industrial seals to leak?

Industrial seal leakage can result from wear, incorrect dimensions, material incompatibility, installation damage, excessive pressure, temperature changes, or problems with the equipment's sealing surfaces.

The type of seal and application also matter. A rotating shaft seal, hydraulic rod seal, and static gasket each have different potential failure mechanisms.

Identifying the location and conditions of the leakage is the first step toward selecting an appropriate replacement. EPM supplies sealing products for hydraulic, pneumatic, rotary, and static applications. EPM can help customers investigate replacement options based on the type of equipment and the conditions causing the leak.

Explore EPM's Industrial Sealing Products →
Why does my new industrial seal keep failing?

A new industrial seal that fails prematurely may indicate that the replacement does not match the application or that an underlying equipment problem remains unresolved.

Possible causes include incorrect material, unsuitable seal geometry, improper installation, damaged mating surfaces, contamination, excessive pressure, or temperature outside the material's operating range.

It is important to evaluate the complete sealing arrangement before installing another replacement. EPM can help review the sealing requirements and investigate alternative products or custom solutions. Providing EPM with details about the failed seal and operating conditions can help guide that evaluation.

Discuss Repeated Seal Failures With EPM →
How can I tell whether seal failure is caused by wear, installation damage, or equipment problems?

Examining a failed seal can provide useful clues about the cause of a problem. However, the condition of the seal should always be considered alongside the equipment, operating conditions, and installation process.

Some general indicators include:

  • Wear: Changes in the sealing surface associated with repeated operation or abrasion.
  • Installation damage: Cuts, deformation, or other damage associated with handling or installation.
  • Equipment problems: Uneven wear, damaged mating surfaces, misalignment, or abnormal clearances.
  • Material incompatibility: Changes in dimensions or physical properties following exposure to operating media or temperature.

EPM can help customers evaluate replacement requirements using failed samples, photographs, and application details. Sharing this information with EPM can help determine whether a different seal profile, material, or design should be considered.

Submit a Seal Failure Inquiry to EPM →
How do temperature and pressure affect industrial seal performance?

Temperature and pressure directly influence how industrial sealing materials and profiles perform.

Elevated temperatures can affect material hardness, elasticity, compression set, and chemical resistance. Low temperatures can reduce flexibility in certain materials.

Pressure affects the mechanical loading on a seal and can contribute to extrusion or accelerated wear when the seal, material, or equipment clearances are unsuitable.

When selecting a replacement, both normal operating conditions and potential temperature and pressure fluctuations should be considered. EPM uses application details such as these when helping customers evaluate suitable sealing products.

Discuss Temperature and Pressure Requirements With EPM →
How can I prevent repeat seal failures in industrial equipment?

Preventing repeat seal failures requires identifying why the original component failed and addressing the underlying cause.

  • Verify the replacement seal's dimensions and profile.
  • Confirm material compatibility with the operating media.
  • Review pressure and temperature conditions.
  • Inspect mating surfaces and equipment clearances.
  • Check for contamination and abnormal loading.
  • Follow appropriate installation procedures.
  • Monitor sealing performance during routine maintenance.

EPM can help investigate alternative sealing materials, profiles, and custom replacements when standard products repeatedly fail. EPM can also help customers evaluate whether a different sealing solution may better match the equipment's operating conditions.

Work With EPM on a Replacement Sealing Solution →

Seal Sourcing & Purchasing

How do I find a reliable supplier for industrial replacement seals?

Choosing an industrial seal supplier involves more than comparing prices. A reliable supplier should be able to help identify the correct product and understand the requirements of the application.

Consider the supplier's:

  • Range of standard industrial sealing products.
  • Custom manufacturing capabilities.
  • Reverse-engineering services.
  • Material and application knowledge.
  • Ability to support hard-to-find replacements.
  • Availability and shipping options.
  • Technical customer support.

EPM combines industrial sealing products with custom manufacturing and reverse-engineering services to help customers address standard and specialized replacement requirements. Customers can work with EPM on both routine product sourcing and more complex sealing challenges.

Learn More About EPM →
What should I include in an industrial seal request for quote (RFQ)?

A detailed request for quotation helps an industrial seal supplier identify the required component and evaluate pricing and availability.

  • Part number or original manufacturer reference.
  • Seal dimensions and profile drawing.
  • Material requirements.
  • Equipment manufacturer and model.
  • Operating pressure and temperature.
  • Media being sealed.
  • Operating speed and movement.
  • Required quantity.
  • Requested delivery date and destination.

Photographs and physical samples can be especially useful when the original part number or technical drawing is unavailable. EPM's contact form allows customers to provide application information and submit their requirements. Providing complete details helps EPM evaluate the request more efficiently.

Submit an RFQ to EPM →
How do I source replacement seals without OEM documentation?

OEM documentation is helpful, but it is not always necessary to identify a replacement seal.

An existing component, physical measurements, photographs, and equipment information can provide the starting point for identifying a suitable replacement.

When no standard product matches the original, reverse engineering may provide a way to develop a custom replacement.

EPM helps customers investigate standard and custom sealing solutions using available samples, drawings, and application information. EPM can help determine what additional details are needed to move forward.

Explore EPM Reverse Engineering →
What should I look for when choosing an industrial seal supplier?

The right supplier should understand the technical requirements of your equipment and offer products that are appropriate for the application.

In addition to product availability, consider whether the supplier can help with:

  • Seal identification and replacement.
  • Material selection and compatibility.
  • Custom seal manufacturing.
  • Reverse engineering of obsolete components.
  • Prototype development.
  • Emergency and expedited requirements.

EPM offers a combination of industrial sealing products, technical assistance, and custom manufacturing services. This allows EPM to support customers looking for standard replacement products as well as those with specialized or hard-to-find sealing requirements.

Contact EPM About Your Sealing Requirements →
How do I source hard-to-find seals for older or imported machinery?

Older and imported machinery can present sourcing challenges when replacement seals use unfamiliar dimensions, discontinued part numbers, or manufacturer-specific profiles.

Start by gathering the equipment manufacturer, model number, existing seal dimensions, photographs, and any available documentation.

If an original component cannot be sourced, a supplier with reverse-engineering capabilities may be able to investigate a replacement based on the existing sample or technical information.

EPM helps customers with difficult-to-source sealing products and custom replacement requirements. EPM can review the available information and discuss whether a standard or custom replacement may be appropriate.

Learn How EPM Approaches Hard-to-Find Seals →

Ordering, Shipping & Emergency Seal Service

What information should I provide when requesting a custom seal from EPM?

EPM uses the S.T.A.M.P.S. approach to help customers provide the information needed to evaluate a sealing application.

  • S – Size: Seal or gasket dimensions.
  • T – Temperature: Operating temperature in °C or °F.
  • A – Application: Reciprocating, rotary, static, or combination movement, along with equipment type.
  • M – Media: The fluid, chemical, or material being sealed.
  • P – Pressure: Actual operating pressure.
  • S – Speed: Operating speed in feet per minute or revolutions per minute.

Quantity is also important. If available, include a photograph, drawing, sample, or original part number. EPM uses these details to help evaluate the application and determine the next steps for a custom sealing request.

EPM's contact form allows customers to provide application information and upload an image.

Complete EPM's Contact Form →
Does EPM offer same-day seal manufacturing and shipping?

EPM advertises same-day manufacturing and shipping options for qualifying seal requirements. Availability depends on the material, dimensions, production requirements, and shipping arrangements.

An expediting fee applies to same-day shipments. Customers should contact EPM with the required specifications and delivery deadline to confirm availability. EPM can then advise whether the requested order can be accommodated.

Contact EPM About Expedited Orders →
Does EPM offer emergency seal service after normal business hours?

Yes. EPM offers Seal 911 emergency service for urgent sealing requirements outside normal business hours, including weekends and holidays.

A seal specialist is on duty to assist customers with emergency seal and gasket requirements. EPM's emergency service is intended for situations where an urgent sealing need cannot wait until normal business hours.

Emergency telephone: 1-800-SEAL-911

Please reserve the emergency number for genuine after-hours, weekend, and holiday emergencies. For standard inquiries, use EPM's regular contact information.

EPM Contact Information →
Does EPM ship industrial seals internationally?

Yes. EPM serves customers in the United States and internationally. Its industrial sealing products are supplied to manufacturing customers across different markets.

Shipping arrangements and delivery times depend on the destination, product availability, and selected shipping service. Customers can contact EPM with their location and product requirements to discuss available shipping arrangements.

Ask EPM About International Orders →
How do I reorder a seal or gasket from EPM?

If you have previously purchased a sealing product from EPM, providing the original part number, order information, or product description can help the team identify the item for reorder.

If the original part number is unavailable, photographs, measurements, or a previous sample may help identify the product.

Contact EPM to discuss repeat orders and potential stocking arrangements for regularly used parts. Providing the previous order details can help EPM locate the product information.

Contact EPM for Reorders →
Can EPM help when an OEM seal is expensive or no longer available?

EPM's reverse-engineering service can be useful when original equipment manufacturer parts are obsolete, difficult to source, or expensive.

By examining an existing sample, drawing, or component, EPM can investigate whether a replacement can be developed and manufactured.

Each project depends on the part design, materials, dimensions, and operating requirements. EPM can review the available information and discuss whether a custom replacement is a practical option.

Learn About EPM Reverse Engineering →
Related EPM Article Seals – To Customized or To Purchase →
How can I get technical help choosing an industrial seal?

EPM provides technical support to help customers identify sealing products and evaluate application requirements. You do not necessarily need to know the exact part number to get started.

Provide the dimensions, equipment type, operating temperature, pressure, speed, and media. Photographs and physical samples can also be helpful.

EPM's team can help investigate available standard products and potential custom solutions. Contact EPM with the information you have, even if some details are unknown.

Ask an EPM Seal Specialist →

Preventative Maintenance & Replacement Planning

How do I know when an industrial seal needs replacing?

Industrial seals should be evaluated when there are signs of leakage, abnormal equipment operation, visible deterioration, or changes in system performance.

Other indicators may include increasing contamination, recurring fluid loss, unusual friction, or damage discovered during scheduled equipment inspections.

Replacement intervals depend on the application, material, operating conditions, equipment design, and maintenance history. There is no single replacement schedule appropriate for every seal.

EPM can help identify replacement sealing products and investigate alternatives for equipment requiring maintenance. Customers can contact EPM with their existing seal information when planning replacements.

Contact EPM About Replacement Seals →
How can I prevent premature industrial seal failure?

Preventing premature seal failure starts with selecting the correct material and profile for the application. Even a high-quality seal can fail early if it is used outside its intended operating conditions.

Good maintenance practices include:

  • Using materials compatible with the operating media.
  • Verifying pressure and temperature requirements.
  • Maintaining proper equipment alignment and clearances.
  • Controlling contamination.
  • Inspecting mating surfaces during maintenance.
  • Following appropriate installation procedures.
  • Investigating repeated failures instead of simply replacing components.

EPM can help evaluate sealing requirements when existing products are not providing the expected service life. EPM can also help customers investigate alternative materials, profiles, or custom-manufactured products for demanding applications.

Discuss Seal Performance With EPM →
Which replacement seals should I keep in industrial spare inventory?

The most useful replacement seals to keep in inventory depend on the machinery, operating environment, maintenance schedule, and consequences of equipment downtime.

Consider maintaining stock of frequently used components such as:

  • Hydraulic rod and piston seals.
  • Pneumatic cylinder seals.
  • O-rings in commonly used sizes and materials.
  • Wiper seals and wear rings.
  • Commonly used gaskets.
  • Oil seals and other rotary sealing components.
  • Complete seal kits for critical equipment.

Prioritize components that are frequently replaced, difficult to source, or associated with critical production equipment. EPM can help identify and source industrial sealing products for maintenance and spare-parts requirements.

Discuss Your Spare Seal Requirements With EPM →
How do I build a replacement seal list for industrial equipment?

A replacement seal list helps maintenance teams organize sealing components used throughout their equipment and production facilities.

For each machine, document:

  • Equipment manufacturer and model.
  • Original seal part numbers.
  • Seal type and location.
  • Dimensions and material.
  • Operating pressure and temperature.
  • Required replacement quantity.
  • Current supplier and availability.
  • Recommended inventory quantity.

Photographs and drawings should be stored alongside the relevant part information. This makes future replacement inquiries easier, especially when original documentation is limited.

EPM can help customers identify sealing products for their equipment and investigate replacements for parts that are difficult to source.

Contact EPM About Your Replacement Seal Inventory →
How do I prepare replacement seal requirements before a planned shutdown?

Preparing sealing requirements before a planned maintenance shutdown can help reduce sourcing delays and avoid unnecessary equipment downtime.

Start by reviewing the equipment scheduled for maintenance and identifying the seals, gaskets, O-rings, and seal kits likely to be required.

Before placing orders:

  • Review existing maintenance records.
  • Confirm equipment and part numbers.
  • Verify dimensions and material specifications.
  • Identify obsolete or hard-to-find components.
  • Request quotations early.
  • Confirm quantities and delivery deadlines.
  • Investigate custom replacements when standard products are unavailable.

EPM can help customers source standard products and investigate custom-manufactured replacements before a scheduled shutdown. Providing EPM with equipment details, quantities, and required delivery dates can help the team evaluate the request.

For time-sensitive requirements, ask EPM about expedited manufacturing and shipping availability.

Submit Your Shutdown Seal Requirements to EPM →

Can't Find the Seal You're Looking For?

EPM specializes in helping customers identify and source industrial seals, gaskets, O-rings, and custom sealing products. Even if you don't have a part number, EPM may be able to help using a sample, drawing, photograph, or measurements.

Include your S.T.A.M.P.S. application information to help EPM evaluate your requirements.

Call EPM: 800-659-5050

Local & International: 770-389-0501

Submit a Contact Form → Browse EPM Products →

Related EPM Articles & Technical Resources

Looking for more information about industrial seals, materials, manufacturing, or sealing applications? Explore these additional resources from EPM.

EPM Machining of Hydraulic Seals

Learn how EPM manufactures hydraulic seals using CNC machining and explore available materials, shapes, and sizes.

Read the Article →
Standard or Custom Seals

Learn when a standard sealing product may be suitable and when custom manufacturing may be the better option.

Read the Article →
Seals – To Customized or To Purchase

Explore the considerations involved in purchasing standard seals versus developing a custom solution.

Read the Article →
EPM Blog

Explore additional articles covering sealing materials, O-rings, PTFE, hydraulic seals, and industrial sealing applications.

Browse All EPM Articles →
EPM Resources

Find additional EPM technical information, product resources, and helpful sealing references.

Browse EPM Resources →
EPM Sealing Gallery

View examples of different sealing products, including rod seals, piston seals, O-rings, oil seals, PTFE components, and custom gaskets.

Explore the Sealing Gallery →

EPM: Your Source for Industrial Seals & Gaskets

From standard hydraulic seals to custom-engineered sealing solutions, EPM helps customers find the products they need to keep industrial equipment operating.

Have a difficult-to-find part? Need a custom gasket? Looking for an obsolete seal replacement? EPM can help you explore the available options.

Contact EPM Today → View All Products →

EPM, Inc. | Industrial Seals, Gaskets, O-Rings & Custom Sealing Solutions.