O Ring Mechanical Seals WM104B

The O Ring Mechanical Seals WM104B is made of elastic polymer in the shape of a letter ‘O’. It provides a mechanical seal to contain liquids or gases. It typically sits in a groove, compressed between a piston and a cylinder. The O Ring Mechanical Seals WM104B is also used to seal static, or non-moving, circular joints between metal components. The fundamental feature of modern o ring mechanical seals is the material they’re made out of rubber. O Ring Mechanical Seals WM104B are used in industrial machinery, farming equipment, cars, airplanes, even spacecraft.

Product Description

Successful o ring mechanical seals joint design requires a rigid mechanical mounting that applies a predictable deformation to the O-ring. This introduces calculated mechanical stress at the O-ring contacting surfaces. As long as the pressure of the fluid being contained does not exceed the contact stress of the O-ring, leaking cannot occur. The pressure of the contained fluid transfers through the essentially incompressible o ring mechanical seals material and the contact stress rises with increasing pressure. For this reason, an O Ring Mechanical Seals WM104B can easily seal high pressure as long as it does not fail mechanically. 


Performance Capabilities of O Ring Mechanical Seals WM104B

Pressure: ≤ 0.6-3.0MPa

Speed: ≤ 13m/s

Temperature: -20℃ ~+200℃    


Combined Materials of  O Ring Mechanical Seals WM104B

● Stationary Ring (Ceramic/SiC/TC)

● Rotary Ring ( Carbon/SiC/TC)

● Secondary Seal(NBR/EPDM/Viton)

● Spring and Punched Parts(Steel)


Common Elastomer Materials of O Ring Mechanical Seals WM104B


1. Buna-N(NBR)

Buna-nitrile is the most common elastomer used in mechanical seals. Depending on the exact compound, Buna is good for moderate temperatures, from about -35 °F to about 250 °F. Buna's chemical resistance is narrow, and it is used mostly for water-based applications. Buna is the lowest cost elastomer used in mechanical seals.


2. Fluoroelastomer (Viton/FKM)

Fluoroelastomers (Viton) offer the best all-around chemical resistance value for mechanical seal applications. Fluoroelastomers can be used at continuous temperatures up to 400 °F. There are some applications — such as steam — and some specific chemicals — such as organic acids and ketones — where EPDM or Kalrez® are specified. While much more expensive than Buna, Viton is still moderately priced.


3. Ethylene Propylene(EPDM)

Ethylene propylene (EPDM) offers outstanding performance in steam and hot water. There are also specific chemical applications where EPDM is the best choice. EPDM is recommended for use up to 300 °F. EPDM is often priced between Buna and Viton.


4. Perfluorocarbon (FFKM)

FFKM offers excellent resistance to chemicals and extreme temperatures. Special compounds can operate beyond 300°C. FFKM is resistant to most chemicals including inorganic acids, alkalines, ketones, esters, alcohols, fuels, and hot water. It is ideal for applications in aggressive chemical environments.

Our Standard FFKM compound has outstanding heat resistance with service temperatures of -10°C to 310°C. Sealcon can offer direct equivalents to Kalrez, Simrez, Perlast, Chemraz, grades.


5. Aflas

Aflas is a specialty, non-conventional fluoroelastomer. A cousin of Viton, it offers higher heat resistance and performs well in high concentrations of acids, oxidants, and alkalis. Aflas is usually somewhat more expensive than Viton.


6. Kalrez

Kalrez is usually the most expensive elastomer option available. With specialty compounds available for use with nearly any chemical, and the ability to withstand temperatures up to 600 °F, Kalrez is an amazing elastomer. O-rings often cost hundreds of dollars each, so Kalrez is only used where absolutely necessary.


7. Specialty Elastomers

There are a variety of specialty elastomers on the market, most of which compete with one of the above materials. Sometimes these are specified by a seal or pump OEM, and Infinity Pump can source these materials for you.



WM104B-650


WM104B-800


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