21WA-W and 21X are indirect acting solenoid valves.
A minimum operating pressure differential of 0,1-0,2 bar
is required for correct operation. A large selection of seal
materials provides wide chemical compatibility. AC/DC
interchangeability of the coil is possible for both NC
and NO configurations. Slow closing, manual operator,
NSF/ANSI 61-G versions are available on request.