描述

截止止回阀是一种可起到截止和止回两种作用的阀门。这种阀门是把阀杆和阀瓣的连接设计成可以开的结构，所以，在关闭阀门时，阀杆可顶住阀瓣运动，使阀瓣密封面与阀座密封面密合，达到关闭阀门状态。此时，阀门起切断管路中介质的截止阀作用。当开启阀门时，是阀杆与阀瓣脱开，此时，阀门可作为防止介质倒流的止回阀用。

The stop check valve is a kind of valve that can play the two functions of cut-off and check. The valve is designed to connect the valve stem and the valve to the open structure, so when the valve is closed, the stem can hold the valve movement to close the valve seal face to the seat sealing surface to close the valve state. At this point, the valve starts cutting off the valve of the medium in the pipeline. When the valve is opened, the stem is disconnected from the disc. At this time, the valve can be used as a check valve to prevent the backflow of the medium.

特点

以前在泵的出口处往往都需要安装一个截止阀（或闸阀）和一个止回阀，现在就可以用这种截止、止回、两用阀来代替了。这种阀门尤其适合于安装位置受到限制的场合。

A cut-off valve (or gate valve) and a check valve are often required to be installed at the outlet of the pump, which can now be replaced by this cut-off, check, and dual use valves. This valve is especially suitable for occasions where the installation position is limited.

用途--

截止止回阀广泛用于给排水、煤气、电力、冶金、石油、化工、热油系统、蒸汽系统、冷热水、系统轻纺以及城建等行业，在蒸汽、水、油、气、燃气、氮气、氢气、液体、硝酸类、醋酸类类介质的管路上作启闭用。