Function of the small pipeline on the outlet valve of the circulating water pump
Thread Content
Dear colleagues and seniors, I would like to ask what the small pipeline attached to the check valve at the outlet of the circulating water pump is for – is it used to balance pressure? I appreciate your advice.
Are you referring to a slow-closing check valve?
That is the oil pipeline of the slow-closing check valve, with a small piston at the top.
It’s used for heat pumps; there seems to be another term as well, something like pressure equalization
This post was last edited by CHANGBAISHI on 2022-10-6 at 06:59. It should be used for cooling mechanical seals. It is recommended to include a video when asking such questions, as it facilitates discussion. For reference.
A slow-closing check valve can prevent the occurrence of water hammer in water tanks, thereby achieving a slow-closing and noise-reducing effect. That is: 1. When the circulation pump stops suddenly, to avoid the high-speed impact caused by backflow of liquid at the pump outlet, slowly close the valve seat of the check valve. 2. Specifically, the closing speed of the check valve can be controlled by adjusting the opening degree of the valves in the small inlet and outlet pipes (copper or stainless steel pipes). 3. During the first adjustment, keep the inlet valve of the small pipeline fully open, and set the outlet valve at 50% opening.