Parker 426325003000-375 Polypak Seal 3 in Id 2000 Psi

Product Description

The PARKER 426325003000-375 is a Polypak-style rod seal designed for hydraulic and pneumatic cylinder applications requiring a reliable single-lip dynamic seal. With a 3-inch inner diameter, 3.5-inch outer diameter, and a seal thickness of 0.375 inches, this part provides a pressure-rated sealing surface rated to 2000 psi. The operating temperature range spans -20 degrees F to 250 degrees F, making it suitable for a wide range of industrial and mobile hydraulic service conditions. Licensed hydraulic technicians and fluid-power mechanics install this type of seal during cylinder rebuilds or scheduled maintenance intervals.

Polypak seals are commonly used as rod seals in hydraulic cylinders found in industrial machinery, mobile equipment, and fluid-power systems. The 3/8 pipe thread specification indicates this seal is dimensioned for use with standard pipe-thread porting configurations. The seal is sold individually and ships as a single-piece package, consistent with low-volume service and repair work where one cylinder end is being rebuilt at a time.

Key Features

• 3-inch inner diameter and 3.5-inch outer diameter for precise cylinder bore fitment
• Seal thickness of 0.375 inches for consistent groove seating
• Maximum operating pressure rated at 2000 psi
• Temperature range of -20 degrees F to 250 degrees F suits diverse hydraulic fluids and environments
• 3/8 pipe thread compatibility for standard porting configurations
• Single-piece packaging supports individual cylinder service and rebuild work

Compatibility

Designed as an OEM-style replacement Polypak rod seal for hydraulic cylinders requiring a 3-inch ID by 3.5-inch OD by 0.375-inch thick seal profile rated to 2000 psi.

Installation Notes

Hydraulic system technicians and fluid-power mechanics should depressurize and fully bleed the hydraulic circuit before removing any cylinder end caps or rod glands. Inspect the rod and cylinder bore for scoring or contamination before installing the new seal. Use appropriate seal installation tools to avoid cutting or rolling the seal lip during installation. Follow applicable equipment manufacturer service procedures and workplace safety guidelines throughout the repair.