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Cast Iron Piston Rings

EPM Can manufacture Cast Iron Piston Rings fast (typically in 4-6 weeks) PERMASEAL TWIN SEAL Developed specifically to provide the lowest possible leakage of any metallic piston...

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machinery working in the gas and oil industry Read Full Article

O-rings for Gas/Oil Industry

If you look at the markets around the world today you can see that the gas & oil market is growing at a very fast pace. Due to this rapid growth, there is a high demand for sealing and o-ring...
Working Conditions (Surface Finish) Read Full Article

Working Conditions (Surface Finish)

Working Conditions SURFACE FINISH The surface finish is very important to provide excellent sealing performance, a low friction and a good seal life. The wear rate is a major factor in the life of a dynamic cylinder,...
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Working Conditions (Speed)

Working Conditions SPEEDIt is very difficult to estimate the maximum speed of a dynamic seal, due to the many functions and factors involved, for example working pressure, fluid viscosity, surface finish, and the seal...
Working Conditions (Friction) Read Full Article

Working Conditions (Friction)

Working Conditions FRICTION Friction is derived from an elastic material sliding against a metal surface in a normal seal application. The theory given for two rigid surfaces sliding is elementary in comparison...
Working Conditions (Pressure) Read Full Article

Working Conditions (Pressure)

Working Conditions PRESSURE When working pressures are too high seal extrusion can occur through the gap between the piston and the cylinder, also the rod and the gland, this would dramatically affect the life of the...
Working Conditions (Temperature) Read Full Article

Working Conditions (Temperature)

Working Conditions TEMPERATURE As a consequence of machine evolution, and the fact that manufacturers are keen to utilize high pressures avoiding the degradation of the hydraulic fluid, there is a real necessity to...