Parker 426325001000-375 Polypak Seal 1in Id 1.5in Od

Product Description

The PARKER 426325001000-375 is a Polypak seal designed for use in hydraulic and pneumatic systems requiring a reliable, low-friction dynamic seal. With a 1-inch inner diameter and 1.5-inch outer diameter, this seal has a 0.375-inch thickness and is rated for operating temperatures from -20 degrees F to 250 degrees F. It is compatible with a 3/8-inch pipe thread connection and is built to handle a maximum operating pressure of 2000 psi. Polypak seals of this type are typically installed by hydraulic technicians, maintenance mechanics, and industrial plumbers working on cylinders, actuators, and fluid power assemblies.

This seal fits applications where a compact, energized packing seal is needed to prevent fluid bypass in reciprocating or rotary equipment. The Polypak design uses a U-cup profile that self-energizes under system pressure, making it well suited for hydraulic cylinders, pneumatic actuators, and fluid control components found in industrial, commercial, and trade service environments. The 3/8-inch pipe thread spec and defined dimensional envelope make this a direct-fit replacement in systems originally specced for this seal size and profile.

Key Features

• Polypak U-cup seal profile self-energizes under system pressure for consistent sealing performance
• Rated to 2000 psi maximum operating pressure for demanding hydraulic applications
• Temperature range of -20 degrees F to 250 degrees F suits a wide range of fluid and ambient conditions
• 3/8-inch pipe thread compatibility for direct installation into threaded ports
• Compact 1-inch ID by 1.5-inch OD by 0.375-inch thick envelope for drop-in fitment
• Sold as a single unit with a minimum order quantity of 1

Compatibility

Designed as an OEM-style replacement Polypak seal for hydraulic cylinders, pneumatic actuators, and fluid power components requiring a 1-inch ID by 1.5-inch OD by 0.375-inch thick seal profile with 3/8-inch pipe thread fitment.

Installation Notes

Installation should be performed by a qualified hydraulic technician or mechanic. Depressurize and isolate the hydraulic or pneumatic circuit completely before disassembling any components to replace this seal. Inspect the mating bore and rod surfaces for scoring or damage before installing a new seal, as surface irregularities will shorten seal life. Lubricate the seal lightly with compatible system fluid during installation to prevent lip damage on assembly.