Which O-Ring material is suitable for food and medical equipment?

Silicone O-Rings compliant with FDA standards are recommended for food processing, beverage, and medical applications due to their chemical resistance and sterilization compatibility.

Are your O-Rings suitable for high-pressure and high-temperature applications?

Yes, using FKM/Viton or NBR materials, O-Rings can withstand high-pressure and high-temperature environments depending on the selected material and application.

What are the standard tolerances for each O-Ring type?

Each standard (AS568, JIS, Metric) defines its own tolerances for ID, OD, and CS. Refer to the corresponding specification chart for precise tolerances.

Can I request custom O-Ring sizes?

Yes, you can provide required inner diameter (ID), cross-section (CS), outer diameter (OD), material, and quantity. Custom O-Rings can be manufactured according to your specifications.

How do I select the right O-Ring material?

Consider operating temperature, chemical exposure, pressure, and compliance requirements. NBR is good for oils and hydraulic fluids, FKM/Viton for high temperature and chemical resistance, EPDM for outdoor or weathering conditions, and Silicone for food/medical applications.

What is the difference between AS568, JIS, and Metric O-Rings?

AS568 uses Imperial sizing standard, JIS follows Japanese standards, and Metric uses millimeter units. Each standard provides precise dimensions and tolerances for different industrial applications.

O Ring from China, O Ring Manufacturer & Supplier - Cixi Lixu Rubber Products Co., Ltd.

What is an O Ring Gasket?

An O Ring Gasket is a circular cross-section seal used to prevent leakage of liquids or gases in mechanical systems.

Manufactured from durable materials like NBR, FKM, EPDM, and Silicone, O Rings ensure long-lasting performance in hydraulic, pneumatic, automotive, and industrial applications.

O Ring Standards & Sizes

AS568 (Imperial)

Standard sizes with ID, CS, OD and tolerances.

JIS (Japanese)

P, G, V series with ID, CS, OD, tolerances for static and dynamic applications.

Metric

M-series precise dimensions suitable for global industrial use. Interactive tables recommended for filtering by standard, size, and material.

Material & Performance Guide

NBR

Resistant to oils, fuels, and hydraulic fluids, suitable for -40°C to 120°C.

FKM / Viton

Chemical- and heat-resistant, -20°C to 200°C.

EPDM

Weather, ozone, and heat resistant, -50°C to 150°C.

Silicone

FDA and food-grade, -60°C to 230°C. Provides guidance for selecting the right material for your application.

Featured O-Ring Products

Highlights top-selling and specialized O-Rings

AS568 Premium NBR O-Ring

Durable for hydraulic systems.

Learn More

FKM/Viton High-Temp O-Ring

Chemical & heat resistant for automotive use.

Learn More

EPDM Weather-Resistant O-Ring

Ideal for outdoor and industrial equipment.

Learn More

Silicone FDA-Grade O-Ring

Safe for food and medical applications.

Learn More

Applications & Industry Uses

Hydraulic Systems

O-Rings seal cylinders, pumps, and valves. NBR or FKM materials ensure oil and pressure resistance, maintaining leak-free operation under high pressure.
Pneumatic Systems

Provides airtight seals in pneumatic actuators, valves, and tubing. EPDM and Silicone O-Rings ensure reliable performance over wide temperature ranges and with compressed air.
Automotive Engines

O-Rings in fuel injectors, oil seals, and cooling system fittings. FKM or NBR materials resist oils, fuels, and high temperatures, preventing leaks and maintaining engine efficiency.
Oil & Gas

Rubber products play a crucial role in the oil and gas industry, and their unique physical and chemical properties make them an indispensable material in this field.
Agriculture

The application of rubber sealing products in the agricultural industry is mainly reflected in agricultural machinery and various agricultural equipment, ensuring the normal operation and extending the service life of the equipment.
Aerospace & Aviation

O-Rings used in fuel lines, actuators, and hydraulic systems. FKM/Viton materials ensure chemical resistance, high-temperature endurance, and reliability in critical aerospace applications.
Water & Plumbing Systems

EPDM and NBR O-Rings used in pumps, faucets, and water valves to prevent leaks. Suitable for potable water and outdoor environmental conditions.

Custom O-Ring Solutions

Lixu Rubber offers fully customizable O-Ring solutions to meet your unique application requirements. You can specify:

Dimensions: Any inner diameter (ID), cross-section (CS), and outer diameter (OD).
Materials: NBR, FKM/Viton, EPDM, Silicone, or other specialty elastomers.
 Standards: AS568, JIS, Metric, or customer-specific specifications.
 Special Requirements: High pressure, high temperature, chemical resistance, color coding, or FDA compliance for food and medical applications.

Our custom O-Rings are manufactured with precision to ensure optimal sealing performance in hydraulic, pneumatic, automotive, industrial, and medical systems. We support both small-batch prototyping and large-volume production with fast turnaround times.

Frequently Asked Questions

Q Which O-Ring material is suitable for food and medical equipment?

A Silicone O-Rings compliant with FDA standards are recommended for food processing, beverage, and medical applications due to their chemical resistance and sterilization compatibility.
Q Are your O-Rings suitable for high-pressure and high-temperature applications?

A
Yes, using FKM/Viton or NBR materials, O-Rings can withstand high-pressure and high-temperature environments depending on the selected material and application.
Q What are the standard tolerances for each O-Ring type?

A Each standard (AS568, JIS, Metric) defines its own tolerances for ID, OD, and CS. Refer to the corresponding specification chart for precise tolerances.
Q Can I request custom O-Ring sizes?

A Yes, you can provide required inner diameter (ID), cross-section (CS), outer diameter (OD), material, and quantity. Custom O-Rings can be manufactured according to your specifications.
Q How do I select the right O-Ring material?

A Consider operating temperature, chemical exposure, pressure, and compliance requirements. NBR is good for oils and hydraulic fluids, FKM/Viton for high temperature and chemical resistance, EPDM for outdoor or weathering conditions, and Silicone for food/medical applications.
Q What is the difference between AS568, JIS, and Metric O-Rings?

A
AS568 uses Imperial sizing standard, JIS follows Japanese standards, and Metric uses millimeter units. Each standard provides precise dimensions and tolerances for different industrial applications.

Blog & Insights

NEWS

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[News] Sep 02,2024

What Is NBR Materials ?

Nitrile butadiene rubber (NBR) is a copolymer made of acrylonitrile and butadiene monomer polymerization, mainly produced by low temperature emulsion polymerization, It has excellent oil resistance, high wear resistance, good heat resistance, strong adhesion. Its disadvantages are poor low temperatu

Oct 08,2026

Customer Reviews & Testimonials

WHAT OUR CLIENTS SAY

The AS568 NBR O-Rings we purchased from Lixu Rubber exceeded our expectations. Excellent sealing performance in our hydraulic systems, very reliable!

Engineering Manager, Automotive Industry
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We use FKM high-temperature O-Rings in our pneumatic equipment. The material quality and durability are outstanding, and Lixu Rubber's custom sizes fit perfectly.

Maintenance Supervisor, Industrial Machinery
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EPDM O-Rings for our outdoor machinery have held up exceptionally well under weather and chemical exposure. Highly recommended supplier.

Plant Operations Lead
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Silicone FDA-grade O-Rings provided by Lixu Rubber ensure our food processing equipment remains compliant and leak-free. Great service and fast delivery!

QA Manager, Food & Beverage
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Customer support was very responsive. They helped us select the right O-Ring material and size for our aerospace applications. Excellent experience.

Procurement Engineer, Aerospace Industry
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We have been consistently satisfied with Lixu Rubber’s O-Rings. High-quality products, precise tolerances, and reliable shipping.

Production Manager, Water & Plumbing Systems
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What is an O Ring Gasket?

O Ring Standards & Sizes

AS568 (Imperial)

JIS (Japanese)

Metric

Material & Performance Guide

NBR

FKM / Viton

EPDM

Silicone

Featured O-Ring Products

AS568 Premium NBR O-Ring

FKM/Viton High-Temp O-Ring

EPDM Weather-Resistant O-Ring

Silicone FDA-Grade O-Ring

Applications & Industry Uses

Custom O-Ring Solutions

Lixu Rubber offers fully customizable O-Ring solutions to meet your unique application requirements. You can specify:

Frequently Asked Questions

Q Which O-Ring material is suitable for food and medical equipment?

Q Are your O-Rings suitable for high-pressure and high-temperature applications?

Q What are the standard tolerances for each O-Ring type?

Q Can I request custom O-Ring sizes?

Q How do I select the right O-Ring material?

Q What is the difference between AS568, JIS, and Metric O-Rings?

Blog & Insights

What Is NBR Materials ?

How to Choose Rubber Gasket Thickness for a Flange Joint

Rubber Gasket vs. O-Ring: Choosing a Seal for Your Joint Design

How to Measure a Flat Rubber Gasket Without Distorting It

Customer Reviews & Testimonials

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