September 5, 2012 AT 2:50 pm

NEW PRODUCT – Plastic Water Solenoid Valve – 12V – 1/2 NPT

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NEW PRODUCT – Plastic Water Solenoid Valve – 12V – 1/2 NPT. Control the flow of fluid using the flow of electrons! This liquid valve would make a great addition to your robotic gardening project. There are two 1/2″ (Nominal NPT) outlets. Normally, the valve is closed. When 12VDC is applied to the two terminals, the valve opens and water can push through. The valve has a gasket arrangement inside, so there is a minimum pressure requirement of 0.02 Mpa (3 PSI). Also, liquid can only flow one direction.

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We tried this solenoid at various DC voltages and found we could actuate it down at 6VDC (although it was a little slower to open). Here is the current draw table for various voltages. We suggest a TIP120 or N-Channel power FET with a 1N4001 kickback diode to drive this from a microcontroller pin. For a power supply, our 9V 1A or 12V 1A power adapters will do the job.

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If you want a beefier water valve, we also carry a brass version which does not have a minimum pressure requirement and can be used with liquid flow in either direction.

In stock and shipping now!


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1 Comment

  1. Cool product!

    I’d like to put a finer point on the description- this valve is a “pilot-assist” diaphragm type, which is a design that allows for a much smaller and less hungry solenoid. (like a tenth of the power).

    The trade-off is slower actuation time, uni-directional flow, and the requirement for a certain minimum pressure in order for the valve to operate. Fortunately, these limitations are seldom a problem, which is why the vast majority of solenoid-operated valves use this principle.

    The brass one is of a direct-acting design, with the opposite characteristics, but there are some folks who will need it.

    Choice. It’s a beautiful thing!

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