Sequence of control valves and check valves

All of them can~~~~~~~~~~~~

If I had to choose, I would definitely put the check valve behind the control valve!

This should be specific to the operating conditions; it’s very difficult to find a satisfactory answer for a single, isolated issue. It’s necessary to narrow down the scope to a specific range in order to find an appropriate solution! Both situations occur; for example, at the pump outlet, the check valve is located in front of the control valve ； Check valves must be installed at the inlet of certain devices, with control valves on the pipeline ahead of them. Your question is quite strange. A check valve is designed for use with equipment, taking into account the characteristics of that equipment and the flow of materials; if it’s not allowed for the flow of materials within the equipment to reverse, then a check valve should be installed ； A control valve is used to regulate the flow rate in a logistics context; its function of regulation is something entirely different from that...

Regarding the order of placement of check valves and control valves, the poster must decide based on the specific circumstances; that is, it is necessary to consider the purpose of the control valve’s function as well as the position where the check valve should be placed. When working on a steam pipeline regulation issue, the check valve is at the front and the control valve is at the back. This is because the steam control valve is used to regulate the steam pressure delivered to the steam network, while the check valve is installed at the boiler to prevent steam from the network from flowing back into the boiler. I hope this will be helpful to the original poster in choosing the valve location.

It seems like it really doesn’t matter; I’ve seen both