Polypac — Custom Rod Seals Manufacturer for Precision Hydraulic Sealing
Polypac — Trusted custom rod seals manufacturer for precision hydraulics
Overview
Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier established in 2008. As a leading custom rod seals manufacturer, we specialize in seal production, sealing material development, and customized sealing solutions for demanding working conditions. Our factory spans more than 10,000 m2 with 8,000 m2 of production space and industry-leading production and testing equipment.
Materials & Product Range
We began with filled PTFE seals—bronze, carbon, graphite, MoS₂ and glass-filled PTFE—and have expanded into elastomers. Polypac supplies O-rings and rubber seals in NBR, FKM, silicone, EPDM and FFKM. This full-material portfolio lets our custom rod seals manufacturer team match material properties to pressure, temperature, chemical exposure and wear requirements.
R&D & Technical Strength
Our long-term collaborations with universities and research institutes at home and abroad ensure continual innovation. As a research-driven custom rod seals manufacturer, Polypac develops new compounds and optimizes seal geometries to extend service life, reduce friction and improve sealing stability under special working conditions.
Manufacturing Capabilities
With advanced molding, machining and quality-testing equipment, Polypac supports small-batch prototyping and high-volume production. Every rod seal undergoes dimensional, hardness and performance testing to meet industry standards and customer specifications, ensuring consistent, reliable parts.
Customization Process
Our streamlined process begins with application assessment and material selection, followed by engineering drawings, prototyping and performance validation. As your custom rod seals manufacturer, we provide rapid samples, iterative refinement and scalable production to meet lead-time and budget targets.
Applications & Industries
Polypac seals serve hydraulics, mobile equipment, oil & gas, aerospace, machinery and process industries where high reliability matters. We design rod seals for extreme temperature, high pressure, corrosive media and abrasive environments.
Why Choose Polypac
Choose Polypac for proven sealing expertise, advanced materials, rigorous testing and customer-focused customization. Partner with a custom rod seals manufacturer that combines academic research with practical manufacturing excellence.
Contact & Next Steps
Contact Polypac today to discuss your rod seal requirements, request samples or start a bespoke sealing project. Our team delivers engineered solutions that protect performance and extend equipment life.
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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.
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.
What is the difference between NBR and FKM materials?
NBR (Nitrile/Buna-N): A general-purpose, cost-effective material with excellent resistance to petroleum-based oils and fuels. It has a standard temperature range of -30°C to +100°C (-22°F to +212°F). FKM (Fluoroelastomer/Viton®): A premium material with excellent resistance to high temperatures (up to 200°C+), chemicals, and oils. It is used in more severe environments but is more expensive than NBR.
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.
Are PTFE seals better than elastomers for chemical resistance?
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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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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
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Metric O-Ring Kits-007 CAT-A | Precision Sized Assortments for European & Asian Machinery
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AS568 Standard O-Ring Kits-006 CAT-GM | SAE Dash Size Assortments for Hydraulics & Pneumatics
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O-Ring Kits-005 CAT-Joint | Complete Assortments for Industrial Repair & Maintenance
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Nitrile & Viton O-Ring Kits CAT 4C8253 | Chemical & Temperature Resistant Seal Assortments.
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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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