SOLENOID VALVES

KLINGER Finland offers magnetic valves from the German company GSR Ventiltechnik GmbH & Co. KG, renowned for their high quality and durability. The GSR range includes various types of magnetic valves designed for different applications and requirements.

Pilot operated valves are characterized by their simple, solid design. As sealing elements, the options are a diaphragm for pressure up to 20 bar or a piston for pressure up to 40 bar. Valves of this type need a pressure differential of the operating pressure for opening and closing. The minimum required pressure is specified as minimum pressure in the technical data sheet. The solenoid system only has a pilot function which relieves the main sealing element, i.e. the diaphragm or the piston. The medium pressure or the present pressure differential lifts the main seal.

Force pilot operated valves operate from 0 bar and can be installed where directly acting valves are used. However, beyond the range of the latter, they are supplied with smaller solenoids for higher pressures and larger nominal sizes. The actuator of a force pilot operated valve opens a pilot orifice and then lifts the sealing element from its seat directly or supported by the delta p of the operating pressure. The special feature of force pilot operated valves is that the actuator in the pressure range can open and close the valve without using the operating pressure. In the case of pressure differential, usually when opening the valve, the collective energy is used.

Direct acting valves switch the sealing element directly via the magnetic system. In this case the seal usually needs to be lifted against the effective operating pressure from the seat simply by the actuator. A closing spring keeps the valve closed, supported by the medium pressure. The function depends on the size of the seat, the effective operating pressure and magnetic force.

Pressure controlled valves are suitable for the control of gaseous, highly viscose, polluted and aggressive media. The actuator is separated from the medium. Neutral or liquid medium of 4-10 bar is necessary for the actuation. The pilot valve is available in standard supply voltages and can be delivered, by request. With compressed air being widely available, this type of valve control is preferable for problematic media. On average, only 0.4 liter of air are consumed for each switching. A return line for the control medium air is not necessary because the air will be returned into the atmosphere during the switching periods.