Can you advise if its best to start a pump against a closed valve then gradually open to the fully open postion, or start the pump when the discharge is full open to the system?

Does anyone know when to use a surge relief valve?

Energize solenoid A and fluid flows through check-valve on left and out A to actuator. I cannot see how fluid flows out of B circuit? What is that solid black triangle symbol in a rectangle above the

I have customers that are asking for SIL (safety integrity level) certification on industrial valves.

How do you warm pumps? I've heard about warm-up lines that bypass discharge check valves, holes drilled in check valves, and operators cracking the suction with a line to process sewer off the discha

Aside from the fact that the actual star rotors device might not function as hoped, what problems will probably keep the entire concept from working as advertised?

Do you know if it is a requirement that the distance between the compressor surge connection take off from the discharge line and the discharge check valve to be minimum? If so, what is the standard?

I was referred an abnormal noise arising out of a motor driven screw compressor (4 lobe compressors) during unloading.