Polypac Bidirectional Sealing Solutions

Polypac Bidirectional Sealing: Reliable, Low-Friction Seals for Two-Way Duty

Overview

Polypac specializes in Bidirectional Sealing designed to perform equally well in reversing flow or pressure directions. Our sealing solutions minimize leakage, reduce friction, and extend service life across hydraulic cylinders, rotary joints, and reciprocating systems where two-way containment is essential.

Why Choose Bidirectional Sealing

Bidirectional Sealing prevents performance loss when direction changes, eliminating orientation constraints of single-direction seals. Polypac's designs ensure symmetric sealing lips, optimized cross-sections, and material selection to deliver consistent sealing force and rapid recovery after pressure reversal.

Advanced Materials and Compounds

Drawing on our roots in filled PTFE technology, Polypac offers bronze-filled, carbon-filled, graphite, MoS2-filled, and glass-filled PTFE options tailored for bidirectional wear resistance and low friction. We also supply O-rings in NBR, FKM, silicone, EPDM, and FFKM to match chemical, temperature, and abrasion requirements.

Custom Manufacturing & Testing

Founded in 2008, Polypac operates a custom rubber ring and O-ring factory spanning over 10,000 m2 with 8,000 m2 of production space. Our advanced production and testing equipment, along with collaborations with universities and research institutions, ensure repeatable quality for complex Bidirectional Sealing applications.

Designs for Special Working Conditions

Polypac engineers create customized seal geometries for high-pressure reversal, contaminated fluids, extreme temperatures, and high-speed reciprocation. We combine material science with precision molding and machining to deliver bidirectional seals that resist extrusion, cutting, and thermal aging.

Applications

Typical uses include hydraulic cylinders, valve seats, rotary unions, piston seals, and downhole tools. Where systems see frequent reversal or dual-pressure zones, Bidirectional Sealing from Polypac reduces downtime and maintenance costs.

Quality Assurance & Support

Our QA process includes dimensional inspection, material certification, friction and wear testing, and pressure cycle validation. Polypac provides technical support for installation, groove design, and lifecycle optimization to ensure your bidirectional seal performs as specified.

Get a Custom Solution

Contact Polypac for tailored Bidirectional Sealing solutions—combining decades of PTFE expertise, diverse elastomer capabilities, and scalable manufacturing to solve your toughest sealing challenges.