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.

Information Guide: