DESCRIPTION
The PB-28 is a two-piece piston seal molded from 70A nitrile for high sealability and employs a hard nylon anti-extrusion ring as a companion piece
This seal is typically found in Asian manufactured lift truck cylinders.
SEAL INFORMATION
Material Type (Primary Seal): NITRILE
Material Type (Support Rings): NYLON
Durometer (Shore A): 70
Temperature Range (F): -20 TO 220
Max Pressure (psi): 3000
Max Speed (ft/sec): 3.0
Mating Surface Roughness - Ra (µm) - DYNAMIC: 0.1<>0.4
Mating Surface Roughness - Ra (µm) - STATIC: 0.8 MAX
Part Number Definition (Metric): MUH-(ID)X(BORE DIAMETER)X(HT)PB-28
Additional Part Number Definition (Metric): 50 X 80 X 12 = MUH-50X80X12PB-28