A checkvalve should be installed on return piping if there will be a pressurized return line or the trap drains to an overhead return line (Fig. B).
如果存在一个压力回路,或者疏水阀排放口位于回路管道的上方,则应该安装一个止回阀(图b)。
2
Can be installed checkvalve or custom comes with a return function of the valve.
可安装止回阀或订制自带止回功能的阀门。
3
This paper derives the characteristic formula of control pressure in hydro-control checkvalve and the mechanical characteristics formula of inlet and return circuit.