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Electrical control of a mechanical valve needed

Dig
I have to open a valve 90 degrees in 200-300ms, I need about 150in-lbs to assure operation. Closing can take longer. (4 full 360 degree turns to open or close)
One caveat, I need to do this electrically.

I am considering a servo or stepper motor on the valve. Servo's have low torque a low speeds, and steppers lose torque at higher speeds. Both of which may prove to not able to handle the job.
 
Any other suggestions you can make?
 
D
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    If you need to open the valve with a 90 degree turn quickly, I would use a solenoid.  You can set up the trigger off of a microcontroller and then add a good high current driver transistor to pop the coil.  You can use a set of lever arms to get the distance translation from the solenoid travel length to the valve.  You shoul be able to easily move the valve in the time you need.

    It looks like you could use a motor with a pulley or gear arrangement to fully close the valve.  A simple limit switch and a DC motor and soom control logic and you turn on the motor and it rotates the valve until it reaches a closed position or when it triggers the limit switch.

     

    If you can replace the valve, go to the hardware store and look into electrically controlled valves for water softners or ice makers.  They should be inexpensive and you could trigger them with switches.

     

    Hope this helps,

    DAB

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  • 0

    If you need to open the valve with a 90 degree turn quickly, I would use a solenoid.  You can set up the trigger off of a microcontroller and then add a good high current driver transistor to pop the coil.  You can use a set of lever arms to get the distance translation from the solenoid travel length to the valve.  You shoul be able to easily move the valve in the time you need.

    It looks like you could use a motor with a pulley or gear arrangement to fully close the valve.  A simple limit switch and a DC motor and soom control logic and you turn on the motor and it rotates the valve until it reaches a closed position or when it triggers the limit switch.

     

    If you can replace the valve, go to the hardware store and look into electrically controlled valves for water softners or ice makers.  They should be inexpensive and you could trigger them with switches.

     

    Hope this helps,

    DAB

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