U-Seal, 3-1/2"X4"X3/8"

U-Seal, 3-1/2"X4"X3/8"

The DPU25-3.50-37 U-Seal (3-1/2" x 4" x 3/8") is a piston-style u-seal engineered to seal on the outside diameter (OD) for dependable performance in hydraulic applications. Built from 92A urethane and rated up to 6000 PSI, it’s designed for extended service life and reliable piston sealing—because seals should prevent leaks, not create new hobbies.

Country of Origin
Varies by production batch

Key Features / Specifications

• Model / Part Number: DPU25-3.50-37
• Product Type: Piston u-seal
• Application: Piston sealing (seals on outside diameter)
• Size: 3-1/2" x 4" x 3/8" (ID x OD x Height)
• Material: 92A urethane
• Temperature Range: -65°F to +230°F
• Pressure Range: 0 to 6000 PSI
• Max Speed: 3 ft/sec
• Design Benefit: Extended service life and maximum reliability in piston sealing
• Part Number Format: (Prefix)(CS) - (ID) - (Height)

Ideal For

• Hydraulic cylinders needing a piston seal that seals on the OD
• High-pressure applications up to 6000 PSI
• Systems operating across wide temperature swings (-65°F to +230°F)
• Maintenance repairs where long seal life and leak resistance are the goal
• Anyone who’d rather see hydraulic fluid in the system, not on the shop floor