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Butterfly valve Main Part Material

Body of Material

Type of Material Material Standard
Cast Iron GG20 GG25, ASTM A126 Class B
Ductile Iron GGG40,ASTM A536 60-40-18
Cast Bronze ASTM B584 G90500
Stainless Steel CF8M, CF8, ZG1Cr18Ni9Ti
Carbon Steel WCB

Disc Material

Ductile Iron (Nickel Plated or Nylon Coated) ASTM A536 60-40-18 DI
Stainless Steel SS410, SS304, SS316
Aluminum Al-Bronze

Stem Material

Stainless Steel SS410, SS304,SS316
Cast Steel WCB (chrome plated)

Seat Material of Body Liner Material

Material Temperature  Ratio
Buna-N(NBR) -12----85 +10----185
Buna-N(Abrasive Resistant) -12----85 +10-----185
Neoprene -7----93 20----200
EPDM -35----135 -30----275
EPDM (Food Grade) -35-----110 -30----230
Hypalon -32----135 0-----275
Vinton -12----135 10---275
PTFE 4.4----121 40---250

Seat Materials are capable of standing lower temperatures without damage. However it would become hard and torques would increase .Some flow media may further rest published temperature limits or significantly reduce seat life.

Butterfly Valve

Butterfly Valve Overview
Hard Sealed Type
Flanged Type
Grooved End Butterfly Valve
Antiseptic Butterfly Valve

Material of parts
Definition of CV Value

Order Code
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Butterfly Valve Wafer check valve Balance valve Gate Valve Globe Valve Ball Valve Y Strainer Flange Pipe fitting

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