O-Rings of NewDealSeals

An O-ring is a torus shaped seal placed between two parts to prevent the passing of fluids and gasses. It is an efficient sealing element for both static and dynamic applications. In industries from aerosol to aerospace, O-rings are the most commonly used seals in the world. Why? Because they are effective, economical, and easy to use.

Although the O-ring is a simple sealing concept, there are many factors to take into account when selecting the right O-ring for a specific application. Our O-ring Technical Handbook explains the factors involved when selecting the right O-ring.

We deliver O-rings according to or any custom size/tolerance required. O-rings are also available in accordance with different standards(AS 568A, DIN 3701, BS 1806/ BS 4518, JIS B2401, JIS NFT47-501, SMS 1568 and ISO 3601) and with various approvals (KTW, USP, NSF 51 61, WRC, WRAS, FDA, R67 01).

Rubber O-Rings

The selection of the right material is crucial for the appropriate applicability of an O-ring. NewDealSeals has all basic materials available with more than 500 rubber compounds. We gladly advise you with making the right choice.

Presented below, the most commonly used O-ring materials. All other basic materials such as FVMQ, HNBR, PU or CR can be found on our rubber materials page.

NBR, Nitrile O-Rings

Temperature range (-40 to 108 °C). Low material price, good oil resistance and good mechanical properties.

NBR, Nitril ► 

VMQ, Silicone O-Rings

Temperature range (-54 to 232 °C). Very suitable for mineral oils. Good flexibility, low compression set, ozone and UV-resistant.

VMQ, Silicone ►

FKM, Viton® O-Rings

Temperature range (-25 to 204 °C). Very good resistance to chemicals, oils, ozone and UV. Suitable for static and light dynamic applications.

FKM, Viton® ►


FFKM, Fluorezi® O-Rings

Temperature range (-30 to 325 °C). Superior chemical resistance to meet the most critical requirements.

FFKM, Fluorezi® ►

EPDM O-Rings

Temperature range (-55 to 150 °C). Good resistance to steam, brake and hydraulic fluids.


FEPM, Aflas® O-Rings

Temperature range (-20 to 204 °C). Unique chemical-, heat resistance and electrical resistivity.

FEPM, Aflas® ►

O-ring Options

Back-Up Rings

Back-up rings are used to prevent extrusion of O-rings in high pressure applications.

Back-Up Rings 

Coated O-Rings

Elastomeric O-rings can be coated to improve the chemical resistance or friction properties.

More info 

FEP, PFA O-Rings

FEP/PTFE encapsulation provides high chemical and temperature resistance while maintaining its resilience.

FEP, PFA Encapsulated 

Hollow O-rings

Hollow core O-rings can be used in applications where low closing force is available.

Hollow O-rings

Advantages O-Ring

  1. Reliable sealing solution
  2. Simple mounting requirements
  3. Suitable for high and low pressure applications
  4. Relatively cheap

Advantages NewDealSeals

  1. More than 500 elastomeric compounds available
  2. Seamless O-Rings available from ID 0.4 – 2000 mm
  3. 100% controlled production process
  4. Polymer laboratory dedicated to the development of custom compounds
  5. Engineering support (design, development, failure analysis & reverse engineering)

How does the O-ring work

An O-ring is an elastic part placed between two parts and then squeezed to fill up the gap between the two parts. When placed under pressure, the O-ring is forced to “flow” within the groove toward the clearance gap. As the O-ring flows against the gap, it produces zero clearance and prevents the sealed substance from escaping.

Staying in shape

An important factor in the effectiveness of any O-ring is its memory, or ability to remember its shape. O-rings are made to always try to regain its original shape despite being squeezed and/or distorted by pressure. O-rings are used for a wide range of applications and environments. An O-ring is a simple concept, but there are over 20 types of materials with more than 500 compound types to choose from in virtually any possible size. The right material and design choice is critical for staying in shape.

Alternative Products

O-rings are ideal for a wide variety of applications but they cannot solve every sealing design project. For this purpose NewDealSeals has a range of alternative seals available that can be used into standard O-ring groove designs.



  1. Minimized risk of spiral failure
  2. High extrusion resistance
  3. Easy to install

D-Rings ►



  1. Space included for lubrication
  2. Low friction
  3. Improved stability


Metallic Seals


  1. High temperature range (-269 up to 980 °C)
  2. High maximum pressure (Up to 10.000 Bar)
  3. Low gas permeation

Metallic Seals

O-rings client cases

Grade A+ O-rings

1. The Challenge

Can you improve dimensional tolerances of Aerospace class A O-rings?

2. The Process

Standard industrial O-rings are being produced according to class B or A tolerances.

Class A O-rings have tighter inside diameter tolerances then class B O-rings and are suitable for industrial or aerospace applications when the application or the housing require tighter tolerances.

In order to further improve our class A O-Rings it was needed to create a new precision multi point injection moulding production tool. The new tool in conjunction with our latest injection moulding machine and a slightly revised FKM compound formulation further reduced tolerances of our class A O-rings by 35%!

Tolerance example:

  • Class B O-ring 36.09 X 3.53 (Tolerances ±0.38 X ±0.10)
  • Class A O-ring 36.09 X 3.53 (Tolerances ±0.30 X ±0.08)
  • Class A+ O-ring 36.09 X 3.53 (Tolerances ±0.22 X ±0.06)

3. The Result

Reduction dimensional tolerances by 35% compared to class A O-Rings
No cost increase due to optimized automatic production process.
A satisfied customer!

Permanent Marking Identification


O-ring Tracers

1. The Challenge

Can you easily detect original spare parts from non original copies?


2. The Process

NewDealSeals supplies millions of O-rings to famous companies such as HITACHI, EMERSON & the Volkswagen Group. In order to protect the quality of spare parts NewDealSeals was invited to find a solution to easily detect original spare parts from non original copies. Together with our client we gather all needed information and developed a custom  compound range with a unique tracer inside the O-ring material. With the existence of the tracer it is easy to detect whether the O-ring is original or not. This will further help our clients to protect themselves against claims and potential losses on the spare part market.

3. The Result

  • Successful introduction of a tracer inside O-ring compounds.
  • No cost increase due to cost effective tracer ingredient.
  • A satisfied customer!



We believe in the quality of our products and service. Fill out the form and one of our skilled engineers will contact you.


+31 (0) 226 362 233


Energiestraat 2-5, 1749 DN Warmenhuizen, The Netherlands