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HERCULES PSM PISTON SEAL

    PSM Piston Seal

    Molded from 93 Shore A polyurethane with a 70 Shore A energizer, this seal utilizes the same groove dimensions as a standard o-ring or T-seal. One or two Style 575 back-up rings may be used for wider grooves. Extrusion resistant by design, this seal is also resistant to rolling and twisting. Installation is an easy two step snap-in procedure with no need
    to re-size before insertion into the bore.
    NOTE: Piston diameter “I” dimensions are given for pistons without wear rings.

    SEAL INFORMATION
    MATERIAL93A URETHANE SEAL
    70A NITRILE
    ENERGIZER
    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
    PSM-218F
    PSM-218
    PSM-218-WB
    PSM-222
    PSM-326
    PSM-326-WB
    PSM-328
    PSM-329
    PSM-330
    PSM-330-WB
    PSM-332
    PSM-48A
    PSM-334
    PSM-334-WB
    PSM-336
    PSM-338
    PSM-338-WB
    PSM-340
    PSM-342
    PSM-342-WB
    PSM-344
    PSM-346
    PSM-425-WB
    PSM-350
    PSM-429
    PSM-433
    PSM-433-WB
    PSM-437
    PSM-439
    PSM-441
    PSM-443
    PSM-445
    PSM-446    		1-1/4
    1-1/4
    1-1/4
    1-1/2
    1-5/8
    1-5/8
    1-7/8
    2
    2-1/8
    2-1/8
    2-3/8
    2-3/8
    2-5/8
    2-5/8
    2-7/8
    3-1/8
    3-1/8
    3-3/8
    3-5/8
    3-5/8
    3-7/8
    4-1/8
    4-1/2
    4-5/8
    5
    5-1/2
    5-1/2
    6
    6-1/2
    7
    7-1/2
    8
    8-1/2    		1-1/2
    1-1/2
    1-1/2
    1-3/4
    2
    2
    2-1/4
    2-3/8
    2-1/2
    2-1/2
    2-3/4
    3
    3
    3
    3-1/4
    3-1/2
    3-1/2
    3-3/4
    4
    4
    4-1/4
    4-1/2
    5
    5
    5-1/2
    6
    6
    6-1/2
    7
    7-1/2
    8
    8-1/2
    9    		.15
    .165
    .265
    .165
    .265
    .395
    .265
    .265
    .265
    .395
    .265
    .235
    .265
    .395
    .265
    .265
    .395
    .265
    .265
    .395
    .265
    .265
    .518
    .265
    .35
    .35
    .518
    .35
    .35
    .35
    .35
    .35
    .35