Characteristics
Piston Cups are normally employed in moderate pressure
cylinders up to 1500 P.S.I. A primary advantage
is the ability to accommodate broad cylinder diameter
tolerances as shown in Figure 1. Series No. 17 – Piston
Cups have knife trimmed sealing lips to eliminate
all molding flash and to provide maximum sealing
performance at low pressure.
In order to establish proper sealing interference
on the piston cups, the piston should be machined
to the “L” dimension as shown in
Figure 2, Page 2.
Standard sizes of piston cups are listed on page
2 of this technical bulletin. The I.D. dimension
shown is standard, however, larger or smaller
diameters can be provided to accommodate existing
designs.
Material
- TYPE: Unithane 292A, Liquid cast Polyurethane
- HARDNESS: Durometer 92A
- FLUID COMPATABILITY: See ‘Material Specifications’, Technical Bulletin
US 96
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