Dimensions & Weights

Wafer Butterfly FKM Seat Dimension Diagram
Valve Size (inch)22 1/2345681012
Valve Size (mm)506580100125150200250300
d (mm)506580100125150200250300
H (mm)191199217227265277287381406
H1 (mm)147155173183211223248304329
H2 (mm)677591101127139169229254
L (mm)434646525656606878
D (mm)90104124146176206257316367
C (mm)125145160180210240295355410
D1 (mm)180180180180230230350250250
L1 (mm)-------250250
E (mm)-------6060
F (mm)-------6363

Pressure / Temperature

Wafer Butterfly FKM Seat Pressure/Temperature Graph

Pressure / Temperature Rating


Test Pressures (Hydraulic)

Shell: 15 bar
Seat: 10 bar 


BearingStainless Steel
BodyDuctile Iron
Disc, StemsStainless Steel
PlugZinc die-cast
SeatFKM (Viton)
Stem BearingMulti-layered bearing


Wafer Butterfly FKM Seat

Wafer Butterfly FKM Seat

  • FKM (Viton) seat
  • FDA requirements, PED-CE, ATEX
  • Suitable for various flanges
  • Integral ISO 5211 actuator mounting flange
  • High performance stem
  • Backup ring to maintain stem sealing
  • Stainless Steel bearing features

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