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Seal Composition Options and Limits

Guide to Mechanical Seal Types and Component Properties - Page 5
Materials of Construction for Types C, D and E
Base Materials Metals Elastomer Bellows Sealing Faces
Standard Steel
Brass
10-8 SS
316 SS
Monel
Buna
Viton
Ethylene
Propylene
*AFLAS

Secondary Seals
Teflon
Non Asbestos
Carbon Graphite
Molded Plastic
Ceramic
NiResist
Cast Iron

Tungsten Carbide
Silicon Carbide
Optional Special Alloy for all purpose applications.
Special secondary sealing element.
Note 1) Tungsten Carbide is available off the shelf for obtaining a better seal life.
2) Special Carbon Abrasion resistance type P66 - Silicone Carbide material available upon request.
Temperature Limits for Elastomers
Buna Viton AFLAS Neoprene EPR
225 °F 400 °F 350 °F 350 °F 300 °F
Secondary Seals Pressure Limits for Seal Types
Teflon A & B C,D & E W & X
500 °F 75 psi 200 psi 350 psi
Elastomers Washers Metal Parts Seats Springs
Buna
Viton
Neoprene
EPR
AFLAS
Bronze
Carbon
Glass Filled PTFE
Silicone Carbide
Molded Plastic

Tooled Steel
Micarta
Tungsten
Carbide
Brass
Monel
Stainless Steel

Cast Iron
Ceramic
NiResist
Plated Steel
Cast Iron
Ceramic
NiResist
Silicon Carbide
Tooled Steel
Tungsten Carbide
Monel
Stainless Steel

Plated Steel
Secondary Seals
Teflon
Non Asbestos

* Information presented hereinis intended only to assist in the identification of an existing seal based on its environment and/or service.

* NE SEAL recommends obtaining independent consultation before deviating from currently employed materials.

* Serious injury or damage could occur if incorrect materials or components are substituted or if incorrect materials or components are substituted.

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