Polypac Rod Seals — Wholesale Hydraulic Rod Seals

Polypac offers high-quality rod seals wholesale for hydraulic systems. With advanced manufacturing, broad material options, and custom solutions, Polypac delivers durable, leak-free performance and dependable supply.

Get a free quote

Product Information

Polypac Rod Seals — Wholesale Supplier You Can Trust

Polypac is a scientific and technical manufacturer specializing in hydraulic seals and oil seals. Founded in 2008, we combine advanced production equipment, a large factory footprint, and ongoing R&D partnerships to offer reliable rod seals in wholesale quantities. Our products are designed for long service life, stable performance, and easy installation.

What We Offer

As a dedicated rod seal supplier, Polypac provides a wide range of seals for hydraulic cylinders, including standard sizes and custom profiles. Our experience with filled PTFE materials (bronze, carbon, graphite, MoS2, glass) and elastomers like NBR, FKM, silicone, EPDM, and FFKM lets us match materials to working conditions for optimal sealing performance.

Materials & Compatibility

Choose the right material for your application: PTFE variants for low friction and high wear resistance, NBR for general hydraulic use, FKM for high-temperature and chemical resistance, and FFKM for extreme environments. We help specify seals that resist pressure, temperature, and contaminants to prevent leaks and downtime.

Why Choose Polypac

- Proven manufacturing: Our custom rubber ring and O-ring factory covers over 10,000 m² with 8,000 m² of production space and industry-leading testing equipment.
- Technical depth: Long-term collaboration with universities and research institutions ensures up-to-date sealing solutions.
- Quality control: Every batch undergoes strict testing for dimension, hardness, and performance to ensure consistent quality.
- Customization: Fast turnaround on custom sizes, compounds, and special coatings to meet unique working conditions.

Applications

Polypac rod seals are used in hydraulic cylinders for construction machinery, industrial presses, mobile equipment, agricultural machinery, and marine systems. They provide dependable sealing under high pressure and continuous operation.

Ordering & Support

We supply wholesale quantities with clear lead times and technical support. Contact Polypac with application details or drawings, and our engineers will recommend the best material and design for durable, leak-free performance.

Product Images

Frequently Asked Questions

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.

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.

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 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.

If you have any other questions, please write email to us or call us , we will reply you ASAP.

Leave a Message