止回閥的安裝是為了保證泵內的水流，從而保證泵的正常運行。因此，止回閥的安裝位置可分為兩種情況：

The installation of the check valve is to ensure the water flow inside the pump, thereby ensuring the normal operation of the pump. Therefore, the installation position of check valves can be divided into two situations:

一種安裝在水泵前面的垂直吸管末端，也稱為底閥。其目的是在不抽水的情況下向水泵注水一次，因為當水泵和泵前的吸管中沒有水時，水泵只能空轉，不能抽水，因此水泵必須充滿水才能抽水。這種水泵的安裝方法高于液位，也稱為負壓法。

A vertical suction pipe end installed in front of a water pump, also known as a bottom valve. The purpose is to inject water into the water pump once without pumping, because when there is no water in the pump and the suction pipe in front of the pump, the pump can only idle and cannot pump, so the pump must be filled with water to pump. The installation method of this water pump is higher than the liquid level, also known as negative pressure method.

另一個安裝在水泵的后面。這種安裝方法是在液位高于水泵的情況下，在啟停水泵時，特別是對于母管水泵系統，不需要關閉水泵出口閥，以防止回流。

Another one is installed behind the water pump. This installation method is used when the liquid level is higher than the water pump, and when starting and stopping the water pump, especially for the main pipe water pump system, there is no need to close the water pump outlet valve to prevent backflow.

閥門生產廠家說泵出口必須安裝止回閥.出口控制閥前的位置用于維修止回閥。一般泵的第1個出口是軟連接(減震器)，其次是止回閥，然后是隔斷閥(如蝶閥).閘閥.截止閥等）

The valve manufacturer said that a check valve must be installed at the pump outlet. The position in front of the outlet control valve is used for repairing the check valve. The first outlet of a typical pump is a soft connection (shock absorber), followed by a check valve, and then an isolation valve (such as butterfly valve), gate valve, globe valve, etc

先裝止回閥，再裝閘閥或蝶閥

Install the check valve first, then the gate valve or butterfly valve

優點：可保護止回閥，特別是在并聯泵中，當泵不啟動時，出口門關閉，另一個泵啟動時，沖擊力由閘閥或蝶閥承擔。止回閥故障后，可關閉進出口閥隔離系統進行維修。

Advantages: It can protect the check valve, especially in parallel pumps. When the pump is not started, the outlet valve closes, and when another pump starts, the impact force is borne by the gate valve or butterfly valve. After the check valve malfunctions, the inlet and outlet valve isolation system can be closed for maintenance.

先安裝閘閥或蝶閥，然后回閥

First install the gate valve or butterfly valve, then the return valve

優點：能保護蝶閥或閘閥，沖擊力由止回閥承擔。

Advantages: It can protect butterfly or gate valves, and the impact force is borne by the check valve.

本文由上海良工閥門山東銷售處整理發布，您是不是對這些內容有所了解了呢?更多的內容請點擊:http://www.zscjzm.com我們會有更多精彩內容等你查看。

This article is compiled and published by the Shandong Sales Office of Shanghai Lianggong Valve. Have you gained some understanding of these contents? For more information, please click on: http://www.zscjzm.com We will have more exciting content waiting for you to check out.