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    42 Products

    High-Stability O-Ring-Loaded U-Cup Seals

    Image of Product. Side 1. Front orientation. U-Cup Seals. High-Stability O-Ring-Loaded U-Cup Seals, Polyurethane Rubber.
    Image of Product. Side 2. Back orientation. U-Cup Seals. High-Stability O-Ring-Loaded U-Cup Seals, Polyurethane Rubber.
    Image of Product. Profile. Front orientation. CrossSection view. U-Cup Seals. High-Stability O-Ring-Loaded U-Cup Seals, Polyurethane Rubber.

    Side 1

    Side 2

    Profile

    Image of Attribute. Rod Installation. Front orientation. Contains Annotated. High-Stability O-Ring-Loaded U-Cup Seals, Polyurethane Rubber.
    Image of Attribute. Piston Installation. Front orientation. Contains Annotated. High-Stability O-Ring-Loaded U-Cup Seals, Polyurethane Rubber.

    Rod Installation

    Piston Installation

    Also known as Type B seals, loaded-lip seals, and PolyPaks, these U-cups are wider than our other O-ring-loaded U-cup seals for better stability. An O-ring secures them to the rod or piston, preventing leaks at low pressure and as the seal wears. Because U-cups have a sealing lip on both the inside and outside edges, they can be used for rod and piston sealing. Pistons require two seals—install one facing in each direction.
    Note: Maximum performance values cannot be achieved simultaneously; for example, speed is affected by pressure, temperature, and other operating conditions.
    For Rod
    Sealing
    For Piston
    Sealing
    O-Ring
    For Rod
    Dia.
    For Groove
    Dia.
    For Bore
    Dia.
    For Groove
    Dia.
    Max. Speed,
    ft/sec
    Max. Pressure,
    psi
    Temp. Range,
    ° F
    Hardness
    Color
    Hardness
    Color
    Each
    Polyurethane Rubber with Buna-N O-Ring
     
    For 0.206" Wide Grooves
    5/8"0.875"7/8"0.625"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K12300000
    3/4"1.000"1"0.750"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1270000
    1"1.250"1 1/4"1.000"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1360000
    1 1/4"1.500"1 1/2"1.250"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1440000
     
    For 0.253" Wide Grooves
    1 3/4"2.125"2 1/8"1.750"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1920000
     
    For 0.275" Wide Grooves
    1/4"0.500"1/2"0.250"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1130000
    3/8"0.625"5/8"0.375"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1160000
    1/2"0.750"3/4"0.500"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1190000
    5/8"0.875"7/8"0.625"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1240000
    3/4"1.000"1"0.750"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1280000
    7/8"1.125"1 1/8"0.875"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1330000
    1"1.250"1 1/4"1.000"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1370000
    1 1/16"1.313"1 5/16"1.062"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1390000
    1 1/8"1.375"1 3/8"1.125"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1410000
    1 1/4"1.500"1 1/2"1.250"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1450000
    1 1/4"1.625"1 5/8"1.250"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1760000
    1 3/8"1.625"1 5/8"1.375"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1510000
    1 1/2"1.750"1 3/4"1.500"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1540000
    2"2.250"2 1/4"2.000"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1590000
    2 1/8"2.375"2 3/8"2.125"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1610000
     
    For 0.343" Wide Grooves
    7/8"1.250"1 1/4"0.875"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1680000
    1"1.375"1 3/8"1.000"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1710000
    1 3/8"1.750"1 3/4"1.375"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1820000
    1 1/2"1.875"1 7/8"1.500"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1860000
    1 5/8"2.000"2"1.625"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1890000
    1 3/4"2.125"2 1/8"1.750"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1930000
    2"2.375"2 3/8"2.000"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1970000
     
    For 0.413" Wide Grooves
    1"1.500"1 1/2"1.000"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K2360000
    1 1/4"1.750"1 3/4"1.250"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K2380000
    1 3/8"1.750"1 3/4"1.375"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1830000
    1 1/2"1.875"1 7/8"1.500"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1870000
    1 1/2"2.000"2"1.500"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K2410000
    1 5/8"2.000"2"1.625"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K1910000
    1 3/4"2.250"2 1/4"1.750"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K2430000
    2"2.500"2 1/2"2.000"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K2460000
    2 3/8"2.875"2 7/8"2.375"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K24900000
    2 1/2"2.875"2 7/8"2.500"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K20700000
    2 1/2"3.000"3"2.500"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K25100000
    2 3/4"3.250"3 1/4"2.750"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K25300000
    3 1/2"4.000"4"3.500"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K26100000
    3 5/8"4.125"4 1/8"3.625"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K26200000
     
    For 0.550" Wide Grooves
    3 3/8"4.000"4"3.375"1.65,000-65 to 300Durometer 90A (Hard)BlackDurometer 70A (Medium)Black9514K32300000
     
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