Hi!
How are you?

I have absolutely stupid question, but I'll appreciate you for your assistance.

I faced the problem. I am going to design some valves like solenoid valves or some pressure regulators and all instructions say I have to design according to the pressure drop across the valve. How this pressure drop should be calculated?

For example, I have a system (R717) with an anhydrator (8TR). I need to calculate solenoid valve on the line from the anhydrator to HP receiver. What the pressure drop?

Thank you!