Parker 426325001250-375 Polypak Seal 1.25x1.75 in

Product Description

The PARKER 426325001250-375 is a Polypak seal designed for dynamic and static sealing applications in hydraulic and pneumatic systems. With a 1.25-inch inner diameter, 1.75-inch outer diameter, and 0.25-inch thickness, this seal provides a reliable pressure barrier rated up to 2000 psi. The Polypak profile uses a spring-energized lip geometry that maintains consistent contact force across a wide operating temperature range of -20 to 250 degrees F. Licensed plumbers, hydraulic technicians, and fluid-power mechanics install this type of seal in cylinders, valve bodies, and actuators where a low-profile, high-pressure face seal is required.

This Polypak seal is suited for both residential and industrial fluid-power applications involving hydraulic cylinders, pneumatic actuators, and pipe fittings with 3/8-inch pipe thread connections. The operating temperature range of -20 to 250 degrees F makes it compatible with a broad range of mineral-based hydraulic fluids and common system media. It is typically installed in reciprocating or static bore applications where sealing integrity at elevated pressures is critical.

Key Features

• Rated to 2000 psi maximum operating pressure for demanding hydraulic service
• Wide temperature range of -20 to 250 degrees F covers most fluid-power system environments
• 1.25-inch ID x 1.75-inch OD x 0.25-inch thick Polypak profile fits standard bore configurations
• 3/8-inch pipe thread compatibility for direct installation in threaded valve and fitting assemblies
• Single-piece Polypak design reduces installation steps compared to multi-component seal stacks

Compatibility

Designed as an OEM-style replacement Polypak seal for hydraulic cylinders, pneumatic actuators, and valve assemblies requiring a 1.25-inch ID bore seal rated for high-pressure service.

Installation Notes

Installation should be performed by a qualified hydraulic or pneumatic technician. Depressurize and lock out the system before removing or installing any seals. Inspect the bore and rod surfaces for scoring or burrs that could damage the new seal during installation. Follow applicable fluid-power safety standards and the equipment manufacturer's service procedures when servicing pressurized assemblies.