Can be operated without differential pressure, e.g. can be used in closed media circuits. The force pilot operated valves from the VZWF series use relatively small solenoids to control high pressures with large nominal diameters. They can switch at pressures as low as 0 bar and close automatically via a normally closed function in the case of a pressure loss in the circuit. The special feature of this type of actuation is the support by the pressure of the medium. This means that smaller coils can be used in comparison with direct operated valves as less power is required at the coil to open the valve. The energy of the pressure of the medium is also used for this purpose.
Can be operated with water, air and neutral media
Possible to control high pres sures with large nominal diameters
Generally suitable for use in all cases where the medium can be vented downstream of the valve into the atmosphere or into a tank
