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  • Single Acting Piston Seals
A single-acting piston seal is designed for cylinders where pressure is applied from one side only. The piston in single-acting cylinders may have oil on the pressure side only, while the opposite side is open to atmosphere. Therefore, the piston seal must leave a minimum of oil film when passing along the cylinder bore since the transportation of oil otherwise would result in a leakage to the exterior.
Design Ref. Material Pressure Temp Speed Dia.
(Bar) °C m/s mm. inch.
H-51 NBR+Fabric 700 -30 +100 0.5
A121,UHP,UNP,A102 PU 400 -40 +95 0.6
C2 NBR 160 -30 +100 0.5
GPY NBR 175(250) -30 +100 1(0.5)
RGY NBR 140(210) -25 +100 1(0.5)
SGY NBR 210 -45 +80 1(0.5)
OHM NBR-Nylon 250 -30 +100 0.5
A153 PU-Acetal 500 -40 +100 0.5
A302 PTFE+Bronze-O-ring 400 -40 +200 15
TK19 PTFE+Stainless Spring 450 -150 +225 15
TK94 NBR+Fabric-POM 450 -30 +120 0.5