The choice of seal materials depends on the types and condition of the working medium (liquid, gas, steam, temperature, pressure, oxidizing ability, etc.), features of using seals (reciprocating or rotational motion, speed of movement), features of the seal design ( radial contact or face) and others.

The material must provide the necessary tightness of the connection and the specified durability of the seal.

Materials for parts of mechanical seals

Material Material
(detailed description)
Material Specifications and Application < /td>

Friction pairs
Carbon Carbon graphite Low cost, good lubricating properties. Resistant to: corrosion, heat. Used for   water and oil environments, operating temperature: + 200 ... + 350

Ceramics, Aluminum Oxide

Resistant to: abrasion, wear. Used for contaminated water and lubricant
SIC Silicon carbide Resistant to: heat, abrasion, corrosion. Used for industrial, submersible, drainage pumps, etc.
TC Tungsten Carbide Resistant to: abrasion, corrosion, heat. Used for industrial, submersible, drainage pumps, etc.

Bellows < /strong>

NBR Butadiene-acryl-nitrile rubber Resistant to: lubricant, liquid fuel: gasoline, diesel fuel and fuel oil. Suitable for water and lubricant.
TEMPERATURE RANGE: -30 ° C to +40 ° C, briefly up to +60 ° C
EPDM Ethylene Propylene Rubber Resistant to: heating, freezing, exposure to chemical reagents.
TEMPERATURE RANGE: -50 ° C to +120 ° C
Viton Fluorine rubber Resistant to: heat, lubricant, reagents, beer, milk, acetone. It is used for hydraulic equipment operating at elevated temperatures.
TEMPERATURE RANGE: -20 ° C to +120 ° C, briefly to + 150 ° C

Compression springs SS304SUS 304 grade steelCorrosion-resistant steel X5CrNI18-10.
SS316 SUS 316 grade steel Stainless steel. Steel enhanced corrosion-resistant ordinary X5CrNiMo17-12-2.

Materials for mechanical seals