Parker 426312500500-250 Polypak Seal 1/2 in Id 3/4 in Od

Product Description

The PARKER 426312500500-250 is a Polypak seal designed for use in hydraulic and pneumatic fluid power systems. It provides a reliable dynamic sealing solution between moving and stationary components, preventing fluid bypass under pressure. The seal measures 0.5 inches inner diameter by 0.75 inches outer diameter with a 0.125 inch thickness and a 0.25 inch seal thickness. It is rated for an operating temperature range of -20 to 250 degrees F and a maximum operating pressure of 2000 psi. Installation is typically performed by hydraulic system technicians, maintenance mechanics, and fluid power specialists servicing cylinders, actuators, and related components.

This Polypak seal is suited for residential and commercial hydraulic cylinder and actuator applications where a compact, low-profile dynamic seal is required. The 1/4 pipe thread reference and dimensional profile make it appropriate for piston or rod seal grooves within that bore range. It is sold individually, with a minimum order quantity of one unit, making it practical for single-component service and repair work.

Key Features

• 0.5 inches ID x 0.75 inches OD x 0.125 inches thick profile fits standard seal grooves in that bore range
• 0.25 inch seal thickness for consistent sealing contact
• Maximum operating pressure rating of 2000 psi for demanding hydraulic service
• Operating temperature range of -20 to 250 degrees F covers a wide range of fluid power applications
• Sold as a single unit with no minimum quantity obligation beyond one piece

Compatibility

Designed as an OEM-style replacement Polypak seal for hydraulic cylinders and actuators requiring a 0.5 inches ID by 0.75 inches OD dynamic seal with a 0.125 inch thickness.

Installation Notes

This seal should be installed by a qualified hydraulic or fluid power technician. Always depressurize the hydraulic system and relieve all stored energy before disassembling any cylinder or actuator. Clean the seal groove thoroughly and inspect for scoring or damage before installing the new seal. Avoid rolling, nicking, or overstretching the seal during installation to maintain its sealing integrity.