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*Care should be taken when designing glands.
1. Dimensional tolerance and surface finish of the glands should be in accordance with Figure G-1. The roughness of packing sliding faces should be 0.4a for rubber packings and 0.8a for rubber-proofed cotton fabric v-packings.
2. The diameter clearance between the piston diameter (D1) and the cylinder diameter is recommended per Figure G-2.
3. The cylinder end and the piston end myst be chamfered as shown by Figure G-2 so as not to damage packings when mounting them and/or assembling cylinders.
4. H9/f8 is recommended for fitting between the cylinder tube and the piston, Figure G-1.
Figure G-1 (U-Packing Housing Dimensions)
Diameter Clearance (D-D1)
Under 100 inches
101 to 160 inches
Diameter D or d
Figure G-2 – Clearance & Chamfering
Under 6 incl.
Over 6 to 10 incl.
Over 10 to 15 incl.
Over 15 to 20 incl.
20 and over