The new Festo solenoid valve VZWP, featuring a piston seal instead of a diaphragm seal, is an ideal universal process valve for water, air, and neutral media.
The valve can be operated wherever there is a pressure difference between the valve input and output. This can include applications where the medium is expelled into the open air or flows into an unpressurized container downstream of the valves. The VZWP is used for gaseous and liquid material flows up to a viscosity of maximum 22 mm²/s in factory and process automation.
The use of a sealing piston instead of a diaphragm means that even high pressures can be controlled with a large nominal diameter. The valve closes automatically if power is lost.
The VZWP are 2/2-way valves, normally closed and are piloted piston poppet valves. The valves come with either NPT or G threads. Units should preferably be mounted with the coil on top. Sizes range from 1/2 to 1 inch. Operating pressure is from .5-40 bar. Process valve nominal pressure is PN 40. Differential pressure is .5 Bar.
Image credit: Festo Corporation