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Solenoid valves, servo-assisted, 2/2-way

In this case, a plunger-type solenoid is used as the pilot valve. The main valve seat is opened and closed by means of a diaphragm.

With this, closing is performed both by the force of the compression spring and by the medium pressure. the medium pressure builds up again above the diaphragm through a restrictor port in the diaphragm or through a bypass channel. The system closes as the result of the higher area ratio (above the diaphragm).

Advantages:

  • Economical mechanical construction
  • Low electrical power consumption
  • Good closing-impact damping
  • Low pressure differential required.

Servo-assisted 2/2-way solenoid valve, normally closed, with diaphragm. Shown closed at left and open at right

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