Piston Seal, 2.50"X0.370"

Piston Seal, 2.50"X0.370"

The PSC-330-WB Piston Seal Assembly is a double-acting hydraulic piston seal designed to replace O-rings, quad-rings, and T-seals while using the same groove dimensions (O-ring dash -330). Built from 95A durometer polyurethane with a 70A nitrile energizer, it delivers excellent extrusion and abrasion resistance, and the crowned sealing surface provides a positive seal from vacuum to high pressure—because hydraulic leaks have a gift for finding your cleanest floor.

Country of Origin
Varies by production batch

Key Features / Specifications

• Product / Part Number: PSC-330-WB
• Product Type: Double-acting piston seal assembly (Wide Base)
• O-Ring Dash Number: -330
• Materials:
  • Seal: 95A polyurethane
  • Energizer: 70A nitrile
• Dimensions:
  • ID (A Nom / Groove Diameter): 2.125" (2-1/8")
  • OD (B Nom / Bore): 2.500" (2-1/2")
  • Height (C Nom): 0.375" (3/8")
  • Groove Width (D): 0.424"
  • Piston Diameter (I): 2.498"
• Performance Ratings:
  • Temperature Range: -40°F to +200°F
  • Pressure Range: 0 to 5,000 PSI
  • Max Speed: 3 ft/sec
• Weight: 0.02004 lb
• Design Notes (as provided): Crowned sealing surface for positive sealing; optional Style 575 urethane back-up rings can be added to one or both sides to accommodate wider groove widths
• Alternate / Cross Reference Numbers (as provided): CP-330-2, CP-330-2UR95, CPS-330-2, B5320, CP330-2, CP-1870-2125-375, SM-00174, 461074

Ideal For

• Hydraulic cylinders needing a double-acting piston seal in an -330 groove
• Upgrading from O-rings / quad-rings / T-seals to a more robust PSC-style seal
• Systems operating up to 5,000 PSI and 3 ft/sec where abrasion and extrusion resistance matter
• Applications working across -40°F to +200°F temperature ranges