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Custom CNC Guide Ring Manufacturer - Polypac Hydraulic Seals

Custom CNC Guide Ring Manufacturer – Polypac

Overview

Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier specializing in precision guide rings, sealing material development, and customized sealing solutions for special working conditions. Founded in 2008, Polypac combines academic collaboration with industry-leading production to serve demanding hydraulic, aerospace, and industrial applications.

Manufacturing Capabilities

As a top custom CNC guide ring manufacturer, our factory spans over 10,000 m² with 8,000 m² of production space and advanced CNC equipment. We produce guide rings and backup rings with tight tolerances and repeatable surface finishes—ideal for piston and rod guidance in high-pressure hydraulic systems. Precision machining ensures consistent wear performance and low friction.

Materials & Product Range

Polypac began with filled PTFE seals and continues to offer bronze-filled, carbon-filled, graphite, MoS₂-filled and glass-filled PTFE guide rings. Our expanded range includes elastomer O-rings in NBR, FKM, silicone, EPDM and FFKM to match compatibility, temperature and chemical resistance needs. We design material blends to optimize friction, swelling and service life.

Quality Control & Testing

Quality is engineered at every step: CNC machining, dimensional inspection, material analysis and performance testing. Our laboratories and test rigs simulate real-world pressure, temperature and abrasion to validate guide ring longevity. Long-term partnerships with universities and institutes ensure continuous R&D improvement.

Why Choose Polypac

Choosing Polypac means reliability, customization and technical support. As an experienced custom CNC guide ring manufacturer, we provide fast prototyping, scalable production and bespoke design guidance to meet special working conditions. Our seal solutions reduce downtime, extend component life and improve system efficiency.

Custom Solutions & Ordering

Contact Polypac for CAD-driven design, material selection and batch manufacturing. Whether you need PTFE-filled guide rings or specialist O-rings for extreme environments, our team delivers engineered sealing solutions with competitive lead times. Request a quote today to optimize your hydraulic system.

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FAQ:

What is the difference between NBR and FKM materials?

NBR (Nitrile/Buna-N): A general-purpose, cost-effective material with excellent resistance to petroleum-based oils and fuels. It has a standard temperature range of -30°C to +100°C (-22°F to +212°F). FKM (Fluoroelastomer/Viton®): A premium material with excellent resistance to high temperatures (up to 200°C+), chemicals, and oils. It is used in more severe environments but is more expensive than NBR.

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.

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.

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.

Table of Contents

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Custom CNC Guide Ring Manufacturer – Polypac
Overview
Manufacturing Capabilities
Materials & Product Range
Quality Control & Testing
Why Choose Polypac
Custom Solutions & Ordering
custom CNC guide ring manufacturer Display

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