可安装止回阀或订制自带止回功能的阀。
Can be installed or custom built non-return valve function of the valve.
可安装止回阀或订制自带止回功能的阀门。
Can be installed check valve or custom comes with a return function of the valve.
此外，第一和第二止回模块是相同的，可以互换。
Also, the first and second check module are identical and can be interchanged.
安装在阀门内的止回模块其阀座应该面对阀门进口。
Check modules are installed in the valve body with the seats facing the valve inlet.
该阀门有四个功能：流量测量、止回、再循环控制和多级降压。
The valve has the four functions of flow measure, flow checking, recirculating control and multistage pressure reducing.
本发明中的止回装置既可采用单向棘 爪棘齿式离合装置，也可以采用单向滚柱超越离合器。
The block device in the invention can adopt one-way pawl-ratchet type on-off devices and one-way roller overrunning clutches.
文中分析认为较经济而可行的方法是在支流下游设立止回闸，防止河水倒流从而保护支流水体。
A suggest is put forward after investigation and analysis that a return flow prevention gate be built for the benefits of economy and environment.
倒流的流体通过倒流的流体压力将止回关闭装置与阀体紧密密封，从而实现阻止倒流的“止回”功能。
Reversed flow is stopped or held in "check" by fluid backflow pressure which seats the closure device against the valve body.
整个阀门无法在线检测，但是，每个止回模块部件编号SA7B 16可以按照下列方法单独进行检测。
Complete valve cannot be tested in the line, however, each check module Part no. SA7B16 can be tested individually as follows.
两个止 回阀和安全阀的阀座和阀座阀瓣应该是可更换的，更换过程不需要特殊工具。
Seats and seat discs shall be replaceable in both check valves and the relief valve without the use of special tools.
上部装置——有上部机壳、上罩、卸料口(装有防回料板)、头轴装配、逆止器等部件。
Upper device — includes parts of upper casing, top cover, discharge outlet (with anti back feed plate), head shaft and backstop.
上部装置——有上部机壳、上罩、卸料口(装有防回料板)、头轴装配、逆止器等部件。
Upper device — includes parts of upper casing, top cover, discharge outlet (with anti back feed plate), head shaft and backstop.
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