Polypac Hydraulic Piston Seal Solutions
Polypac Hydraulic Piston Seal Solutions
Precision Manufacturing and Capacity
Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier with a custom rubber ring and O-ring factory spanning over 10,000 m² and 8,000 m² of production space. Since 2008, our advanced production and testing equipment enable consistent, high-quality hydraulic piston seal output to meet large-volume and precision applications.
Materials Engineered for Performance
We specialize in filled PTFE varieties—bronze, carbon, graphite, MoS₂ and glass-filled PTFE—plus elastomers including NBR, FKM, silicone, EPDM and FFKM. These materials are selected and formulated to extend service life, resist extrusion, minimize friction and handle temperatures, pressures and aggressive fluids commonly encountered by hydraulic piston seal systems.
Custom Sealing Solutions for Special Conditions
Whether you require low-friction seals for high-speed pistons, anti-extrusion designs for high-pressure cylinders, or bespoke compounds for chemical or thermal extremes, Polypac provides tailored hydraulic piston seal designs. Our engineering team collaborates with clients to optimize geometry, tolerances and material blends for specific environments.
R&D and Industry Collaboration
As one of China’s largest seal developers, we maintain long-term partnerships with universities and research institutions worldwide. Continuous R&D allows Polypac to refine sealing polymers and structures—improving durability, sealing reliability and compatibility for modern hydraulic systems.
Quality Assurance and Testing
Rigorous in-line and final testing ensures each hydraulic piston seal meets performance specifications. Our quality protocols cover dimensional inspection, material hardness, wear testing and simulated working-condition trials to guarantee consistent sealing performance in the field.
Why Choose Polypac
With deep material expertise, full-scale production capacity and custom engineering services, Polypac delivers reliable hydraulic piston seal solutions that reduce downtime, lower lifecycle costs and increase system efficiency. Contact Polypac for samples, technical consultation and rapid prototyping tailored to your application.
hydraulic piston seal Display
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.
Can I reuse a seal?
We strongly recommend never reusing seals. Once compressed and used, a seal takes a "set" and its elastic properties are degraded. Reusing it almost always results in a leak. Always install a new seal during any maintenance or repair.
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.
How can I prevent seal damage during installation?
Use Tools: Always use dedicated installation tools (e.g., picks, cones, guides). Lubricate: Always lubricate the seal and the contact surface. Protect Sharp Edges: Cover sharp threads and edges with tape or use an installation sleeve. Check the Groove: Ensure the installation groove is clean, deburred, and undamaged.
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Mini O-Ring Kits-011 SUMITOM | Compact Assortments for Electronics, RC Models & Small Appliances
FKM O-Ring Kits | High-Temp & Chemical Resistant Seal Assortments
FKM O-Ring Kits | High-Temp & Chemical Resistant Seal Assortments
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Buna-N (Nitrile) O-Ring Kits-008 KOMATSU | Oil Resistant Seal Assortments for General Purpose Use
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Metric O-Ring Kits-007 CAT-A | Precision Sized Assortments for European & Asian Machinery
AS568 Standard O-Ring Kits-006 CAT-GM | SAE Dash Size Assortments for Hydraulics & Pneumatics
AS568 Standard O-Ring Kits-006 CAT-GM | SAE Dash Size Assortments for Hydraulics & Pneumatics
O-Ring Kits-005 CAT-Joint | Complete Assortments for Industrial Repair & Maintenance
O-Ring Kits-005 CAT-Joint | Complete Assortments for Industrial Repair & Maintenance
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Plumbing & HVAC O-Ring Kits012 HITACHI | Assortments for Water, Refrigerant & Gas Connections
Mini O-Ring Kits-011 SUMITOM | Compact Assortments for Electronics, RC Models & Small Appliances
Mini O-Ring Kits-011 SUMITOM | Compact Assortments for Electronics, RC Models & Small Appliances
FKM O-Ring Kits | High-Temp & Chemical Resistant Seal Assortments
FKM O-Ring Kits | High-Temp & Chemical Resistant Seal Assortments
Buna-N (Nitrile) O-Ring Kits-008 KOMATSU | Oil Resistant Seal Assortments for General Purpose Use
Buna-N (Nitrile) O-Ring Kits-008 KOMATSU | Oil Resistant Seal Assortments for General Purpose Use
Metric O-Ring Kits-007 CAT-A | Precision Sized Assortments for European & Asian Machinery
Metric O-Ring Kits-007 CAT-A | Precision Sized Assortments for European & Asian Machinery
AS568 Standard O-Ring Kits-006 CAT-GM | SAE Dash Size Assortments for Hydraulics & Pneumatics
AS568 Standard O-Ring Kits-006 CAT-GM | SAE Dash Size Assortments for Hydraulics & Pneumatics
O-Ring Kits-005 CAT-Joint | Complete Assortments for Industrial Repair & Maintenance
O-Ring Kits-005 CAT-Joint | Complete Assortments for Industrial Repair & Maintenance
Nitrile & Viton O-Ring Kits CAT 4C8253 | Chemical & Temperature Resistant Seal Assortments.
Nitrile & Viton O-Ring Kits CAT 4C8253 | Chemical & Temperature Resistant Seal Assortments.
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O-Ring Kits CAT 4C4782 | Assorted Seal Kits for Repair, Maintenance & DIY Projects
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Tube-801 | Industrial & DIY Tubing for Plumbing, Pneumatics, Hydraulics & Protection
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Tubes-T01 | Flexible & Rigid Pipe for Fluid, Air & Electrical Applications
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GSF Piston Seals for Straight Cylinders | Bidirectional Seals for Ram & Plunger CylindersStay Updated with Industry Insights
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Polypac is a trusted global supplier of high-performance sealing solutions, providing OEM & ODM services for industries worldwide.
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