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Mechanical Seal Face Materials
Aug 23, 2017

Mechanical Seals come in a wide range of designs however the most important factor when determining how long a seal is going to last, is deciding on the right seal face materials.


Selecting Your Seal Face

 

The materials used for your mechanical seal are dependant on the liquid that is being pumped. The first material is used on the rotating face of the mechanical seal. The second material is the stationary face of the seal. (rotating / stationary)

 

Carbon/Ceramic (Car/Cer):

 

1.Used for clean liquids. No particles to scratch the face of the seal. Pump must always have liquid in the system before and during start-up. Failure to do so will result in failure of the mechanical seal.


Carbon/Silicon Carbide (Car/SiC):

 

2.Used for applications that may have a dry start-up. The pump can start without water in the pump for a few seconds. The Carbon face prevents the face of the seal from burning up during a dry start-up.

 

Silicon Carbide/Silicon Carbide (SiC/SiC):

 

Used for liquids with abrasives. Silicon Carbide is a hard surface that prevents scratching.

 

Pump must always have liquid in the system before and during start-up. Failure to do so will result in failure of the mechanical seal.

 

Selecting Your Seal and O-ring Elastomers

 

Buna:

 

Water applications

Oil Solutions

Aromatic fuels and solvents

Capable of handling temperatures up to 225°F


Viton:

 

Oil Solutions

Good chemical resistance

Animal/Vegetable Oil

Aniline

Hydraulic Fluid

Capable of handling temperatures up to 400°F


EPR/EPDM:

 

Used in the presence of heat or steam

Ozone

Acids

Alkalis

Capable of handling temperatures up to 350°F


Contact Us:

Shaanxi DaoLin Mechanical & Electrical Co.,Ltd

Room1107, Building B, Sail Times Plaza, Hou Wei Zhai, Wei Yang 

District, 710085, Xi’an  City, Shaanxi Province, China

Tel.:+86(029)84523807-802 Fax: +86(029)84523807-808

Email: sales@inseals.com

www.inseals.com

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