Metric Rod Seals — Precision Hydraulic Sealing by Polypac
Metric Rod Seals from Polypac — Reliable Sealing for Demanding Hydraulic Systems
High-Performance Materials & Design
Polypac's Metric Rod Seals are engineered using industry-proven materials, including filled PTFE variants and advanced elastomers like NBR, FKM, EPDM, silicone, and FFKM. Our experience with bronze-filled, carbon-filled, graphite, MoS2, and glass-filled PTFE provides rod seals that resist extrusion, wear, and chemical attack while maintaining low friction and long service life.
Custom Solutions for Special Working Conditions
When standard rod seals fall short, Polypac excels at customization. Our 10,000+ m2 facility and collaboration with leading universities allow us to tailor cross-sections, compound formulations, and backup designs for extreme temperatures, high pressures, aggressive media, and high-speed reciprocation. We manufacture Metric Rod Seals to fit ISO and DIN dimensions or bespoke specifications.
Precision Manufacturing & Rigorous Testing
Every Metric Rod Seal is produced on advanced extrusion and moulding equipment and undergoes strict dimensional and performance testing. Polypac's quality labs validate compression set, hardness, permeability, and dynamic sealing performance to ensure consistent sealing integrity and long-term reliability in the field.
Wide Range of Applications
Polypac Metric Rod Seals are ideal for hydraulic cylinders, industrial actuators, mobile equipment, and fluid power systems across construction, agriculture, aerospace ground support, and marine sectors. Their robust construction minimizes leakage, extends maintenance intervals, and protects system efficiency.
Why Choose Polypac
Founded in 2008, Polypac combines technical R&D with large-scale production. As one of China’s leading seal manufacturers, we offer fast prototyping, material development, and long-term supply relationships. Our expertise in PTFE composites and elastomers ensures Metric Rod Seals that meet demanding performance and regulatory requirements.
Ordering & Technical Support
Contact Polypac for sample evaluation, material recommendations, and custom quotes. Our engineering team provides design review and testing support to help you select the right Metric Rod Seals for optimal system uptime and cost-efficiency.
Metric Rod Seals Display
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 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.
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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