These vacuum valves are of the three-way type, with two positions and with pneumatically controlled conical valves.

They can be used either normally closed or normally open.

Their application is recommended in all those cases where a quick exchange between suction of the vacuum pump and the incoming of air into the circuit, for a quick recovery of the atmospheric pressure is required.

They are made up of a body in anodized aluminium, two vulkollan valves put on a stainless steel stem, a membrane in a special rubber for the servo control and a spring for the valves return.

The particular execution of these valves allows to reduce frictions and internal dynamic stresses as much as possible, the result being a high response speed and a guarantee of long lasting operation.

Working pressure: from 0 to 3 bar abs.

Pressure required at the servo control: from 4 to 8 bar (g).

Technical Data Sheet