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Hygienic butterfly valves model F250 & F251
Appendix A - Technical specification
Butterfly valve ordering code
- F250 for imperial tubing (inch sizes)
- F251 for metric tubing (mm sizes)
Butterfly valve material
All metal parts that come into contact with the liquid are made of stainless steel according to W.
Nr. 1.4404. The other metal parts are made of stainless steel W. Nr. 1.4301. The bearings are made
of POM.
Seat and flange seal material
The seat can be made of:
VMQ (white)
EPDM (black)
NBR (black)
FPM (red)
The flange seal (butterfly valve wafer style) is made of EPDM - FDA. Alternatives are available.
Liquid operating pressure
The maximum liquid operating pressure is 10 bar, the minimum is full vacuum, both at 20°C.
Operating temperature
Butterfly valves with standard seat and flange seal can resist temperatures between minus 10 and
95°C.
Air supply actuator F 257
Double acting:
3 - 8 bar
Spring return:
5.5 - 8 bar
Pentair reserves the right to change the contents without notice
- FDA
- FDA
- FDA
page 4
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