Parker 426312500750-250 Polypak Seal 3/4 in Id

Product Description

The PARKER 426312500750-250 is a Polypak seal designed for use in hydraulic and pneumatic systems where reliable rod or piston sealing is required. With an inner diameter of 0.75 inches, an outer diameter of 1 inch, and a seal thickness of 0.125 inches, this seal fits into compact gland geometries common in cylinders and actuators. It is rated for operating pressures up to 2000 psi and a temperature range of -20 to 250 degrees F. The 1/4 pipe thread reference indicates compatibility with standard ported configurations. Hydraulic technicians and fluid power mechanics install this part in both industrial and mobile equipment applications.

This Polypak seal is suited for low-friction, single-acting sealing applications in hydraulic cylinders, pneumatic actuators, and similar fluid power assemblies. Its compact cross-section makes it appropriate for residential and light commercial hydraulic equipment as well as industrial machinery where space constraints demand a thin-profile seal. Installation is typically performed by fluid power technicians or maintenance mechanics working on cylinder rebuilds or seal replacements.

Key Features

• 0.75 inches inner diameter x 1 inch outer diameter for precise gland fit
• 0.125 inches seal thickness suits compact gland designs
• Rated to 2000 psi maximum operating pressure
• Temperature range of -20 to 250 degrees F for broad service conditions
• Polypak profile provides low breakout friction in single-acting applications
• UNSPSC Code 20122851 for procurement classification

Compatibility

Designed as an OEM-style replacement Polypak seal for hydraulic cylinders and pneumatic actuators requiring a 0.75 inches ID x 1 inch OD x 0.125 inches thick seal gland geometry.

Installation Notes

This seal is installed by qualified fluid power technicians or hydraulic mechanics. Depressurize and isolate the hydraulic or pneumatic circuit completely before disassembly. Inspect the gland bore and rod surface for scoring or burrs that could damage the new seal during installation. Lubricate the seal lightly with clean system fluid before insertion to avoid tearing the sealing lip.