High Pressure Rod Seals – Polypac Professional Hydraulic Sealing Solutions

High Pressure Rod Seals by Polypac

Polypac specializes in high pressure rod seals designed to withstand demanding hydraulic environments. Our rod seals combine advanced filled PTFE and elastomer compounds to provide superior extrusion resistance, low friction, and long-term reliability under high pressure. Built for heavy-duty hydraulic cylinders, these seals minimize leakage and downtime while maximizing equipment efficiency.

Advanced Materials and Precision Manufacturing

We use a broad portfolio of materials including bronze-filled PTFE, carbon-filled PTFE, MoS2-filled PTFE, glass-filled PTFE and elastomers such as NBR, FKM, EPDM, silicone and FFKM. Polypac's production facility—over 10,000 m2 with 8,000 m2 of factory space—employs industry-leading molding and CNC finishing equipment plus rigorous inspection systems to ensure each high pressure rod seal meets exact tolerances and surface finish requirements.

Designed for Extreme Conditions

Our high pressure rod seals are engineered for applications with severe pressure, high sliding speeds, and temperature cycling. Optimized sealing lips, anti-extrusion profiles and compatible back-up rings yield reliable performance in hydraulic presses, construction machinery, mining equipment, and subsea actuators. Materials are selected for chemical compatibility and wear resistance to extend service intervals.

Customization & R&D Strength

Founded in 2008, Polypac combines decades of seal expertise with ongoing R&D collaboration with universities and research centers. We offer tailored solutions—custom geometries, compound formulations and rapid prototyping—to meet special working conditions and OEM specifications, delivering sealed prototypes and production volumes on competitive lead times.

Applications and Industries

Polypac high pressure rod seals serve hydraulics across construction, agriculture, oil & gas, marine, material handling and industrial automation. They are ideal where leakage control, energy efficiency and long lifecycle are critical.

Why Choose Polypac

Choose Polypac for proven technical expertise, advanced materials, strict quality control and customer-focused customization. Our seals reduce maintenance costs, improve uptime and are backed by responsive technical support and supply chain reliability.

Technical Support & Ordering

Contact Polypac with rod diameter, pressure, temperature range and media to start a custom high pressure rod seals solution. We provide material recommendations, 3D drawings and testing data to accelerate your development.

high pressure rod seals Display

FAQ:
How important is surface finish on the metal parts that contact the seal?

Extremely important. A rough surface will abrade and wear out the seal quickly, causing leaks. A finish that is too smooth can prevent a lubricating film from forming. A typical recommended surface finish for dynamic applications is 0.2 to 0.8 μm (8-32 μin) Ra.

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 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.

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.

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