Parker 426337504000-625 Polypak Seal 4 in Id 4-3/4 in Od

Product Description

The PARKER 426337504000-625 is a Polypak seal designed for dynamic and static sealing applications in hydraulic and fluid power systems. With a 4-inch inner diameter, 4-3/4-inch outer diameter, and a 0.375-inch seal thickness, this seal provides a reliable interference fit in standard gland designs. Rated to a maximum operating pressure of 2000 psi and a temperature range of -20 to 250 degrees F, it is suited for demanding service conditions. The 5/8 pipe thread connection dimension aids in proper gland and bore sizing during installation. Hydraulic technicians and fluid power specialists are the primary installers of this component.

This Polypak seal is intended for use in hydraulic cylinders, actuators, and fluid power assemblies where a low-friction, energized lip seal profile is required. The Polypak design is commonly specified in both industrial and mobile hydraulic equipment operating at elevated pressures. It is appropriate for applications requiring a compact seal cross-section within a precise bore.

Key Features

• 4-inch inner diameter and 4-3/4-inch outer diameter for standard hydraulic bore sizing
• 0.375-inch seal thickness for proper gland depth fitment
• Maximum operating pressure of 2000 psi for demanding hydraulic service
• Temperature range of -20 to 250 degrees F covering most industrial operating environments
• 5/8 pipe thread reference dimension for gland and bore sizing
• Sold individually with a minimum order quantity of 1

Compatibility

Designed as an OEM-style replacement Polypak seal for hydraulic cylinders and fluid power actuators requiring a 4-inch ID by 4-3/4-inch OD seal profile.

Installation Notes

Installation should be performed by a qualified hydraulic technician. Depressurize and isolate the hydraulic circuit completely before disassembling any cylinder or actuator. Lubricate the seal with clean system fluid prior to installation to avoid lip damage during assembly. Inspect the gland bore and rod surface for scoring or burrs that could compromise the seal contact area.