A couple of 12VDC 3-way stainless universal solenoid valves for water use with little success.  They need to operate in the 20-30 psi range but have a proof pressure above 1,000 PSI.  (The HP pump will be locked out and system pressure reduced before the valve operates.)
Other requirements are:
3/8" NPT fittings preferred on one and 3/4" on the other.
CV > .7
I have an Asco solenoid catalogue which probably has your valve in it ( Red Hat Series) -  operating pressure  differential for water ( with 3/8" connections) is 35 psi-
proof pressure is 5 times safe working pressure -above is from Ascoelectric Asco Solenoid valve catalogue # 32C-

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