Solenoid valve for water duty 1

[toolmantwo]

I have an application for a valve to use for cold low-pressure de-ionized water. The flow is now in 1/2 PVC waterline. My question is will the standard electric solenoid valves work OK? The catalog information says they are general service, suitable for air, water, oil, or gases. Would brass constuction be better than stainless steel? Should one type of seal be used over another? I want a large flow rate (Over 4 Gallons per Minute). This is all USA application.

The temperature is 70 degrees F and the pressure is less than 60 PSI. I was planning on using a filter and strainer in the line before the valve to avoid problems with dirt in the valve. The main risk is that if the valve would fail to close we would over-flow coolant on the shop floor for some time. It is not a “Lights out” operation, because the operator will be in the same room. The solenoid valve is intended as the second safety of a mechanical float valve. If the mechanical float valve would fail the switch would turn off the flow. I was planning to use a switch that is liquid level control in the same tank that would turn off the power to the NC solenoid valve.

 

[pennpoint]

toolmantwo
It would not be in your best interest to use a brass bodied valve with de-ionized water (over time). Because the ion starved water will corrode the valve. Four gallons is not a large flow rate. Stainless would be better than brass but sence your using 1/2" PVC why not use a PVC valve.
Look at:

http://www.ryanherco.com/

As they should have something that will suite your needs without worry of the de-ionized water.

good Luck
pennpoint

 

[toolmantwo]

Thanks Pennpoint,

I think Ryanherco will have a valve to serve my needs. This is a great site with very helpful people.

Take care, John