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 non-taped National Pipe) 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,
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.
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.
These solenoids are not rated for food safety or use with anything but water.
1/2" Nominal NPS
Working Pressure: 0.02 Mpa - 0.8 Mpa
Working Temperature: 1 ℃ - 75 ℃
Response time (open): ≤ 0.15 sec
Response time (close): ≤ 0.3 sec
Actuating voltage: 12VDC (but we found it would work down to 6V)
Actuating life: ≥ 50 million cycles
Weight: 4.3 oz
Dimensions: 3.3" x 1.69" x 2.24"