Installation location of the check valve
Thread Content
Should the check valve at the pump outlet be installed in front of the outlet valve, behind it, or is either location acceptable?
A check valve is installed at the outlet of the pump, while a filter is generally installed at the inlet. The purpose is to prevent backflow and reverse rotation of the pump, as well as to facilitate maintenance.
We usually install it in front of the outlet valve, as this facilitates the maintenance of pumps; it also makes it easier to carry out repairs in case the check valve is damaged. Today I met a worker from the construction site who said that elsewhere it’s installed behind the outlet valve, and that sulfuric acid is used. I thought different media had special requirements, so I came to ask the experts here.
Normally, it is installed in front of the outlet valve, but there have also been many cases where it is installed behind the outlet valve, mainly due to the owner’s request. In fact, none of these affect usage; the installation is carried out based on the owner’s requirements for maintenance.
Install in the order of pump outlet — check valve — manual valve
Everything shall be constructed according to the plans. In cases where special requirements arise, a written document issued by the relevant department along with an authorized signature is required for the engineering change order; as long as someone is responsible for giving approval, it doesn’t matter where it’s installed – what’s important is that the payment can be processed. This cannot just be left at words alone.
Similar discussions have taken place many times on the forum; I’d like to recommend a relatively well-structured post to everyone! https://bbs.hcbbs.com/thread-2692402-1-1.html
The check valve is generally installed in the direction of the pump outlet, and it can be placed either before or after the control valve. When installing, pay attention to the direction of the water flow and the direction of the check valve.
The check valve at the pump outlet should be installed in front of the outlet valve; this is covered in books such as \"National Industrial Pipeline Design and Engineering Applications\" and \"Petrochemical Pipeline Design\"
Every year, new people come to Haichuan, starting with the basic questions