I'm hoping to control the flow of chemical by shutting a solenoid valve periodically over short intervals, similar to this video: https://youtu.be/O49mqn33vBI?t=6

Does anyone know if conventional solenoids can be controlled by PWM to produce, say, 500 cycles per minute? Is banging a 'conventional' solenoid that rapidly a good idea usually? By conventional solenoids, I mean those found in coffee machines and others commonly available:

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If not, how are PWM solenoids constructed differently?

Any thought appreciated.

  • 1
    \$\begingroup\$ It's product dependent and not general so contact a solenoid/valve supplier. \$\endgroup\$ – Andy aka Nov 15 '20 at 15:16
  • \$\begingroup\$ See if proportional-valves helps your understanding. \$\endgroup\$ – Transistor Nov 15 '20 at 16:30
  • \$\begingroup\$ @Transistor I've looked into them but they cost way too much for me (upward of $200 each?). \$\endgroup\$ – John M. Nov 15 '20 at 16:35
  • \$\begingroup\$ As an example, a GM automotive EGR valve uses 3 solenoid coils that pass airflow at rates of 1, 2, and 4. Digital switching activates these coils in combination to achieve 8 distinct flow rates including zero. The 3 coils operate a single tapered pintle valve. \$\endgroup\$ – John Canon Nov 15 '20 at 16:59
  • \$\begingroup\$ Most components with moving parts should include a “lifetime” rating in cycles. A 1,000,000 cycle rated solenoid valve at 500 cycles/minute gives 2000 minutes as the rated usage time. Is that enough to make your design practical ? \$\endgroup\$ – Mark Leavitt Nov 15 '20 at 19:31

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