You cannot use the screen wire as a ground wire. Normally the screen wires are grounded at only one place and that too at the control room end. DCS or PLC panels. You can use a 3 core cable and ground one core at the solenoid valve. But in many applications I have seen, 110 VAC solenoids are...
I have workded on valves with shut off time less than 1 second. It is mandatory for the gas expansion turbines we use and this quick shutoff is generally tested for less than 1 second by giving a trip command and checking the feedback time in the PLC / DCS. I use a piston operated valve with air...
