control of solenoid valve

Discussion in 'The Projects Forum' started by mah, Apr 26, 2015.

  1. mah

    Thread Starter Active Member

    Mar 15, 2010
    276
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  2. MaxHeadRoom

    Expert

    Jul 18, 2013
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    No, these usually have a proportional valve that is controlled by a ±10vdc amplifier or controller.
    Max.
     
  3. mah

    Thread Starter Active Member

    Mar 15, 2010
    276
    2
    what do you mean by "these"?
     
  4. Marcusone

    New Member

    Apr 25, 2015
    6
    0
    the one you link will draw power to open the valve (you can not control via voltage how open it is; its ether open (via 12v energized) or closed (no power)).
     
  5. BillB3857

    Senior Member

    Feb 28, 2009
    2,400
    348
    Valves similar to the one linked to in post #1 usually use the supply side pressure to assist in closing the valve. When the solenoid is energized, a small bleed port is opened in the diaphragm which allows the pressure holding the valve closed to bleed off and the valve to open. This type valve is not designed to modulate flow, just full or none.
     
  6. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Ones that will perform the task you describe via PWM etc.
    They are called proportional valves as the pilot spool is moved 'proportionally' according to the applied signal. They are used with an appropriate amplifier in closed circuit control of hydraulic equipment and are very expensive compared to the simple single movement spool valve.
    Max.
     
    KansaiRobot likes this.
  7. M Tate

    New Member

    Aug 5, 2015
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    Your problem may be not on the electrical side. I notice that this valve is a pilot-operated valve, not a direct acting solenoid.
     
  8. MaxHeadRoom

    Expert

    Jul 18, 2013
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    The OP has not got back for 4 months now?
    Max.
     
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