The design and lectotype of circulatingpump, automatic return water switch valve, expansion tank and atmospheric connection pipe in atmospheric hot water heating boiler room are discussed.
对常压热水供热锅炉房的循环泵、回水自动启闭阀、膨胀水箱、大气连通管的设计选型进行了探讨。
2
In the hot water system a high water tank with solenoid valve controlled water feeder is used to replace the secondary circulatingpump.
热水系统中，采用电磁阀根据水箱液位进行补水，省去二次循环泵。
3
And a by-pass pipe with check valve is set between the inlet and outlet of circulatingpump.