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HERCULES PSU PISTON SEAL

    PSU Piston Seal

    Our Style PSU piston seal, or uniring, is a laminated one piece double acting seal made of cast polyurethane. The tough outer layer is highly resistant to abrasion and is impregnated with molybdenum disulfide to reduce friction. The softer inner layer acts as a static seal and also energizes the OD to make full contact with the bore. This seal may be used to replace an existing Uniring or other seals of the same dimensions — O-rings, O-rings with back-ups, T-seals, U-seals, etc. NOTE: Piston diameter “I” dimensions are given for pistons without wear rings.

    SEAL INFORMATION
    MATERIAL60D & 57A
    URETHANE
    COMPOSITE
    TEMPERATURE
    RANGE
    -65° TO +220° F
    PRESSURE
    RANGE
    0 TO 5,000 PSI
    SPEED3 FT/SEC
    Part NumberA
    Nom. ID
    B
    Nom. OD
    C
    Nom. Ht
    PSU-1.50X1.00X.375
    PSU-1.50X1.12X.250
    PSU-1.50X1.25X.187
    PSU-1.75X1.25X.375
    PSU-1.75X1.37X.250
    PSU-1.75X1.37X.500
    PSU-2.00X1.50X.375
    PSU-2.00X1.62X.312
    PSU-2.00X1.62X.375
    PSU-2.25X1.87X.312
    PSU-2.50X2.00X.375
    PSU-2.50X2.12X.312
    PSU-2.50X2.12X.375
    PSU-2.75X2.37X.312
    PSU-3.00X2.50X.375
    PSU-3.00X2.50X.500
    PSU-3.00X2.62X.312
    PSU-3.00X2.62X.375
    PSU-3.25X2.75X.550
    PSU-3.25X2.87X.312
    PSU-3.50X3.00X.375
    PSU-3.50X3.12X.312
    PSU-3.50X3.12X.375
    PSU-3.75X3.37X.312
    PSU-4.00X3.50X.375
    PSU-4.00X3.62X.375
    PSU-4.50X4.00X.375
    PSU-4.50X4.00X.562
    PSU-5.00X4.37X.500
    PSU-5.00X4.50X.375
    PSU-5.00X4.50X.500
    PSU-5.00X4.50X.562
    PSU-5.25X4.75X.562
    PSU-5.50X5.00X.375
    PSU-6.00X5.50X.375
    PSU-6.00X5.50X.562
    PSU-6.50X6.00X.562
    1
    1-1/8
    1-1/4
    1-1/4
    1-3/8
    1-3/8
    1-1/2
    1-5/8
    1-5/8
    1-7/8
    2
    2-1/8
    2-1/8
    2-3/8
    2-1/2
    2-1/2
    2-5/8
    2-5/8
    2-3/4
    2-7/8
    3
    3-1/8
    3-1/8
    3-3/8
    3-1/2
    3-5/8
    4
    4
    4-3/8
    4-1/2
    4-1/2
    4-1/2
    4-3/4
    5
    5-1/2
    5-1/2
    6
    1-1/2
    1-1/2
    1-1/2
    1-3/4
    1-3/4
    1-3/4
    2
    2
    2
    2-1/4
    2-1/2
    2-1/2
    2-1/2
    2-3/4
    3
    3
    3
    3
    3-1/4
    3-1/4
    3-1/2
    3-1/2
    3-1/2
    3-3/4
    4
    4
    4-1/2
    4-1/2
    5
    5
    5
    5
    5-1/4
    5-1/2
    6
    6
    6-1/2
    3/8
    1/4
    .187
    3/8
    1/4
    1/2
    3/8
    .312
    3/8
    .312
    3/8
    .312
    3/8
    .312
    3/8
    1/2
    .312
    3/8
    .55
    .312
    3/8
    .312
    3/8
    .312
    3/8
    3/8
    3/8
    .562
    1/2
    3/8
    1/2
    .562
    .562
    3/8
    3/8
    .562
    .562