Piston Seal, 2.500X2.125X.265

Piston Seal, 2.500X2.125X.265

The PSM-330 Piston Seal Assembly is a high-performance hydraulic piston seal sized 2.125" ID x 2.500" OD x 0.265" height, built for high-pressure sealing with an extrusion-resistant design that also resists rolling and twisting. Molded from 93A polyurethane with a 70A nitrile energizer, it uses standard O-ring/T-seal groove dimensions and installs with a two-step snap-in process—no resizing needed, and no interpretive dance required to get it seated.

Country of Origin
Varies by production batch

Key Features / Specifications

• Product: PSM-330
• Product Type: PSM piston seal assembly
• Cross References / MFG #: H775-330, PSP-330A, CSM-330, 357-03-0012, 357-03-0060, DAGI250212-280, 81-5420, 4304BP330A
• Nominal Size (ID x OD x Height): 2.125 in x 2.500 in x 0.265 in (2-1/8 x 2-1/2 x .265)
• Material: 93A urethane seal with 70A nitrile energizer
• Temperature Range: -40° to +220°F
• Pressure Range: 0 to 5,000 PSI
• Max Speed: 3 ft/sec
• O-Ring Dash Number: -330
• Groove Diameter (H): 2.125 in
• Groove Width (D): 0.280 in
• Bore: 2.500 in
• Piston Diameter (I): 2.498 in (dimensions given for pistons without wear rings)
• Design Notes: Extrusion resistant, resists rolling/twisting, snap-in installation, uses O-ring to T-seal groove dimensions
• Backup Ring Option: One or two Style 575 back-up rings may be used for wider grooves
• Weight: 0.01862400 lb

Ideal For

• Hydraulic cylinders needing a 2.125" ID / 2.500" OD piston seal with standard O-ring/T-seal groove compatibility
• High-pressure applications up to 5,000 PSI where extrusion control is critical
• Systems where seal stability helps reduce failure from rolling or twisting
• Fast service work where a snap-in seal saves time and headaches
• Equipment operating across -40°F to +220°F temperature ranges