Ball-Head Ring Seals | Polypac Custom Hydraulic Seals

Ball-Head Ring Seals by Polypac

Overview & Purpose

Polypac Ball-Head Ring seals are engineered to provide high-performance sealing where spherical contact, angular misalignment, or rotary movement occurs. Designed for hydraulic cylinders, rotary unions and special motion joints, Ball-Head Rings combine a precision-shaped elastomeric sealing lip with a rounded head profile to maintain contact under variable loads while minimizing wear and leakage.

Materials & Compatibility

Available in NBR, FKM, silicone, EPDM and FFKM, our Ball-Head Rings are formulated to withstand different temperatures, hydraulic fluids and chemical environments. For extreme applications we offer filled PTFE variants—including bronze, carbon, graphite, MoS₂ and glass-filled PTFE—leveraging our decades of expertise in specialty sealing materials to deliver low-friction, high-durability performance.

Design & Customization

Polypac specializes in custom designs: head radius, cross-section, shore hardness and compound additives are tailored to match your operating pressure, speed and misalignment tolerance. Our in-house engineering team collaborates with clients to convert functional requirements into optimized seal geometry, reducing friction while extending service intervals for critical equipment.

Manufacturing & Quality Assurance

Our custom rubber ring and O-ring factory spans over 10,000 m² with leading production and testing equipment. Every Ball-Head Ring undergoes dimensional inspection, hardness verification and simulated service testing. Long-term partnerships with universities and research institutions reinforce our R&D and ensure consistent, reproducible quality in mass and bespoke production.

Applications & Benefits

Commonly used in hydraulic actuators, rotary joints, pump shafts and pivoting connections, Ball-Head Ring seals reduce leakage, compensate angular offsets and lower torque. Benefits include improved equipment uptime, extended seal life, and compatibility with OEM assembly processes. Polypac offers fast prototyping, volume manufacturing and technical support to streamline product integration.

Why Choose Polypac

Since 2008, Polypac has combined scientific material development with precision manufacturing to deliver sealing solutions for demanding environments. When you specify Ball-Head Ring seals from Polypac, you get proven material science, customizable designs, and industry-grade testing backed by a global supply capability.