Polypac Pneumatic Seals — Reliable Sealing Solutions
Polypac Pneumatic Seals — Reliable Sealing Solutions
Overview
Polypac is a scientific and technical manufacturer specializing in Pneumatic Seals, hydraulic seals and oil seals. Founded in 2008, we combine decades of material science with scalable production to deliver seals that meet stringent industry demands. Our product portfolio covers filled PTFE variants and versatile elastomers including NBR, FKM, silicone, EPDM and FFKM.
Materials & Performance
Our Pneumatic Seals use optimized materials—bronze-filled, carbon-filled, graphite, MoS₂-filled and glass-filled PTFE—for low friction, high wear resistance and long service life. Elastomeric O-rings in NBR, FKM and FFKM provide superior sealing across pressures and temperatures, ensuring reliable performance in pneumatic actuators, valves and cylinders.
Manufacturing & Testing Capabilities
Polypac’s custom rubber ring and O-ring factory spans over 10,000 m² with 8,000 m² of advanced production space. We deploy industry-leading production and testing equipment to control tolerances, hardness, and material consistency—guaranteeing every Pneumatic Seal meets performance specifications and batch traceability.
Applications & Benefits
Designed for pneumatic systems, our seals reduce leakage, lower friction losses and extend maintenance intervals. Typical applications include pneumatic cylinders, servo systems, air preparation units and industrial automation. Benefits include enhanced energy efficiency, predictable life cycles and minimized downtime.
Customization & Special Conditions
Polypac excels at customized sealing solutions for special working conditions—high temperature, aggressive media, high speed or extreme pressure. Close collaboration with universities and research institutions enables rapid material development and prototype validation tailored to your application.
Quality Assurance & Support
From design consultation to production and testing, Polypac provides full-service support. Our QA processes ensure each Pneumatic Seal adheres to strict standards. Technical support and fast sampling help accelerate your design cycles and reduce time-to-market.
Why Choose Polypac
As one of China’s largest seal manufacturers, Polypac combines advanced materials, precision manufacturing and customer-focused customization. Choose Polypac for durable, high-performance Pneumatic Seals that protect equipment, improve efficiency and lower total cost of ownership.
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.
What is the purpose of the metal spring in a rotary shaft seal?
The garter spring in a shaft seal (e.g., FSKR, SPGO types) provides a constant radial force on the sealing lip. This ensures consistent contact with the rotating shaft, compensating for minor wear, eccentricity, and vibration to prevent lubricant leakage.
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 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.
How important is surface finish on the metal parts that contact the seal?
Extremely important. A rough surface will abrade and wear out the seal quickly, causing leaks. A finish that is too smooth can prevent a lubricating film from forming. A typical recommended surface finish for dynamic applications is 0.2 to 0.8 μm (8-32 μin) Ra.
Plumbing & HVAC O-Ring Kits012 HITACHI | Assortments for Water, Refrigerant & Gas Connections
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
Plumbing & HVAC O-Ring Kits012 HITACHI | Assortments for Water, Refrigerant & Gas Connections
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.
O-Ring Kits CAT 4C4782 | Assorted Seal Kits for Repair, Maintenance & DIY Projects
O-Ring Kits CAT 4C4782 | Assorted Seal Kits for Repair, Maintenance & DIY Projects
Tube-801 | Industrial & DIY Tubing for Plumbing, Pneumatics, Hydraulics & Protection
Tube-801 | Industrial & DIY Tubing for Plumbing, Pneumatics, Hydraulics & Protection
Tubes-T01 | Flexible & Rigid Pipe for Fluid, Air & Electrical Applications
Tubes-T01 | Flexible & Rigid Pipe for Fluid, Air & Electrical Applications
GSF Piston Seals for Straight Cylinders | Bidirectional Seals for Ram & Plunger Cylinders
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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