Cooperated with RD safety circulatingvalve, it can entirely take the place of APR-M2 tool with the character of accurate sampling, reducing construction period, simple and safe sampling etc.
The design and lectotype of circulating pump, 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。
3
In the hot water system a high water tank with solenoid valve controlled water feeder is used to replace the secondary circulating pump.