O-Rings » Rubber Oring Seals

Datwyler's high performance o-rings are available in a variety of materials, in both standard and custom sizes. Our proprietary rubber compounds are designed to perform in a wide range of applications with varying chemical exposures, pressures and temperatures. Our computer controlled camera inspection system for seals insures the highest level of quality for our customers.

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Rubber Orings » by Material Type

Nitrile O-rings (NBR, Buna-N):
     • 70 duro NBR
     • 70 duro NBR, NSF 61
     • 90 duro NBR
     • 70 duro Metric NBR

Custom O-Rings

Datwyler custom orings can be manufactured to:

     • Custom Size
     • Custom Material to Customer Specification
     • Custom Material to ASTM D2000 Specification
     • New Material developed to Solve Application Issue
orings examples

Specialty O-Ring Materials

Special Grade Viton® Orings
     • Viton ® GB, GBL, GLT, GFLT
Liquid Silicone Orings (VMQ)
rubber oring materials
Viton ® is a registered trademarks of E. I. du Pont de Nemours and Company or affiliates. Fluorel ® is a registered trademark of Dyneon LLC
custom oring quote request
oring material selection guide
buy orings online

O-Ring Structure » How to describe an O-Ring

Table: O-Ring Geometry:
Image: O-ring Geomtry
Custom Orings and Metric Orings are typically described by their Internal Diameter (ID), Radial Cross Section (CS), Rubber Material from which they are constructed plus the material Hardness on a Shore A scale or Datwyler Compound Number.
For AS568A Size O-rings, parts are described as the AS568 size with a suffix of the Rubber Material from which they are constructed plus the material Hardness on a Shore A scale or the Datwyler Compound Number. For examples of how to indicate an o-ring size, please visit the as568 oring page or the metric oring page.
O-ring Application Background

O-ring Application » Functional Description

An o-ring is a simple and versatile ring-shaped packing or sealing device with a circular cross section, from which the "O" in its name is derived. O-rings function as compact and reliable sealing devices by absorbing the tolerance stack-up between closely mated surfaces in both dynamic (moving) static (stationary) applications.
An oring seals by blocking any potential leak path of a fluid (liquid or gas) between two closely spaced surfaces. The oring is generally installed in a machined groove in one of the surfaces to be sealed. As the two surfaces are brought together, forming a gland, they squeeze the cross section on the oring.
Datwyler engineers are available to assist you in selecting the right oring for your application, including material, size, and mating gland design and associate seal squeeze. Please contact us today to discuss your application.
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O-Ring Design » Considerations and Tools

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When designing and application utilizing o-rings seals, there are a number of Datwyler tools and reference guides available to help identify the correct starting place in material and application design. These tools and materials are Reference Only, and need to be validated in all applications.
Application Factor:
Preliminary Orings Considerations
Material Chemical Resistance
Selecting a Compound Type
Oring Cross Section & ID Sizing
Design to a Standard Size
Gland Sizing Starting Point
Specifying the Rubber for a Part Print
Listing of Preliminary Design Considerations
Datwyler Elastomer Chemical Resistance Guide
Datwyler Material Guide
O-ring Cross Sectional and ID Sizing Calculation Guidelines
AS568A Standard Size O-rings
Datwyler Gland Design Reference by Application Type
ASTM D2000 Standard Classification System for Rubber Products
Products Examples by Category
Rubber Molding & Manufacturing:
Engineering, R&D, Product Realization:
Industry Experience & Solutions:
Molded Rubber