Hydraulic piston rod seal kit — Polypac High-Performance Seals

Hydraulic piston rod seal kit — Reliable sealing engineered by Polypac

Product overview

Polypac's Hydraulic piston rod seal kit is engineered to protect piston rods from leakage, contamination, and wear in high-pressure hydraulic systems. Optimized for reciprocating motion, our kits combine low friction, high abrasion resistance, and excellent extrusion control to extend cylinder life and reduce maintenance intervals.

Materials & formulations

We offer a wide range of sealing materials including filled PTFE options (bronze-filled, carbon-filled, graphite PTFE, MoS2-filled, glass-filled) and elastomers such as NBR, FKM, silicone, EPDM, and FFKM. These selections allow precise balancing of friction, chemical compatibility, temperature tolerance, and wear resistance for each Hydraulic piston rod seal kit configuration.

Manufacturing capability & quality

Polypac’s custom rubber ring and O-ring factory spans over 10,000 m² with 8,000 m² of production space and industry-leading testing equipment. Founded in 2008, we combine decades of PTFE expertise with modern CNC molding and automated inspection to ensure consistent dimensional accuracy and reliable sealing performance.

Customization for special conditions

Whether you require high-speed, high-pressure, abrasive, or chemically aggressive environments, Polypac provides tailored Hydraulic piston rod seal kit solutions. We collaborate with universities and research institutes to develop bespoke compounds and geometries for extreme operating conditions and OEM integration.

Applications & benefits

Common applications include mobile hydraulics, construction machinery, industrial presses, and marine actuators. Benefits include improved sealing life, reduced downtime, lower leak-related contamination, and optimized energy efficiency due to reduced friction.

Testing & certification

Each kit undergoes rigorous performance testing—pressure, cycle life, temperature aging, and compatibility checks—to meet or exceed client specifications. Traceability and material certificates are available to support quality assurance processes.

Why choose Polypac

As one of China’s largest specialized seal manufacturers, Polypac pairs advanced materials science with large-scale precision manufacturing to deliver dependable Hydraulic piston rod seal kit solutions. Contact our engineering team for fast prototyping, competitive OEM pricing, and end-to-end sealing consultation.

Hydraulic piston rod seal kit Display

FAQ:
Why did my O-ring fail prematurely?

Common causes of O-ring failure include: Chemical Incompatibility: Swelling, softening, or cracking due to fluid exposure. Improper Sizing: Using an incorrect size leads to over-compression or inadequate sealing force. Abrasion: Wear and tear from rough surface finishes or contaminated fluid. Extrusion: The seal is forced into the gap between metal parts under high pressure. Installation Damage: Nicks, cuts, or twists during assembly.

What is the difference between a static seal and a dynamic seal?

A Static Seal is used between two surfaces that do not move relative to each other (e.g., pipe flanges, end caps). O-rings and gaskets are common static seals. A Dynamic Seal is used between surfaces that do move (e.g., piston and cylinder, rotating shaft). Rod seals, piston seals, and rotary shaft seals are designed for this purpose.

How do I choose the right material for my sealing application?

Material selection depends on four key factors: Media: What fluid or gas will the seal contact? (e.g., petroleum oil, water, chemicals, steam) Temperature: What is the minimum and maximum operating temperature? Pressure: What is the system's operating pressure? Are there pressure spikes? Application: Is it a static, dynamic, or rotary seal? Example: NBR (Buna-N) is excellent for standard hydraulic oil, while FKM (Viton®) is needed for high temperatures or aggressive chemicals.

What does "AS568" mean?

AS568 is the Aerospace Standard that defines the dimensions for over 360 standard O-ring sizes. It is the most widely accepted sizing system in North America and globally. An AS568 number (e.g., AS568-214) specifies a precise inside diameter and cross-section.

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