Materials

The choice of seal materials depends on the type and condition of the working environment (liquid, gas, steam, temperature, pressure, oxidation capacity, etc.), features of the use of seals (reciprocating or rotary motion, travel speed), seal design features (radial-contact or face), etc.

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

Materials of mechanical seal parts

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Description	Material	Material (detailed description)	Material Specifications and Applications
Friction couples	Carbon	carbon graphite	Low cost, good lubricating properties. Resistant to: corrosion, heating. Applicable for water and oil media, working temperature: +200℃... +350℃
	Ceramic	Ceramic, Aluminum Oxide	Resistant to: abrasion, wear. Suitable for contaminated water and lubricant
	SIC	Silicon carbide	Resistant to: heat, abrasion, corrosion. Used for industrial submersible, drainage pumps, etc.
	TC	Wolfram carbide	Resistant to: abrasion, corrosion, heat. Used for industrial submersible, drainage pumps, etc.
Bellows	NBR	Acrylic Nitrile Butadiene Rubber	Resistant to: lubricants, liquid fuels: gasoline, diesel fuel and oil. Applicable for water and lubricant. TEMPERATURE RANGE : -30 °C to +40 °C, short-term up to +60 °C
	EPDM	Ethylene propylene rubber	Resistant to: heat, freezing, chemicals. TEMPERATURE RANGE : -50°C to +120°C
	Viton	Fluoroelastomer	Resistant to: heat, lubricants, chemicals, beer, milk, acetone. It is applied to the hydraulic equipment working at elevated temperature. TEMPERATURE RANGE : -20°C to +120°C, short-term - up to +150°C
Compression springs	SS304	Steel Grade SUS 304	Steel corrosion-resistant ordinary X5CrNI18-10.
	SS316	Steel Grade SUS 316	Stainless steel. Steel increased corrosion-resistant ordinary X5CrNiMo17-12-2.