Huaihua Loudi constant pressure water supply equipment, water supply equipment manufacturers Huaihua Loudi constant pressure water supply equipment, water supply equipment, water supply equipment manufacturers China are specialized in manufacturing in Hunan water equipment manufacturers, following briefly the role and purpose of classification according to the valve shut-off valve ①: shut-off valve also known as closed valves, and its role is to connect or disconnect the line media. truncated valve including gate valves, globe valves, plug valves, ball valves, butterfly valves and diaphragm valves, etc. ② Check Valves: Check valves, also known as one-way valve or check valve, whose role is to prevent the line of medium back. Pump suction pipe valve bottom valve also belong to category. ③ Safety valve: valve class is to prevent the line or apparatus medium pressure exceeds the set value, so as to achieve the purpose of security protection. ④ regulating valve: Valve class includes control valve, throttle valve and pressure relief valve, which role is to regulate the pressure of the media, the flow and other parameters child. ⑤ shunt valve: shunt valve including various distribution valve and steam trap, its role is assigned, the line of separation or mixed media. Vacuum valve at nominal classification ① refers to the work pressure is lower than standard atmospheric pressure of the valve. ② low pressure valve means nominal pressure PN ≤ 1. 6MPa valve. ③ medium pressure valve means, PN 2.5MPa, 4.OMPa, 6.4MPa valve. ④ pressure valve means, PN 10 - 80MPa valve. ⑤ high pressure valve means valve nominal pressure PN ≥ 1OOMPa. Huaihua Loudi constant pressure water supply equipment, water supply equipment, water supply equipment manufacturers Hua Du Tel: 15073127301 0731-89740696 QQ: 1502743851 Contact: Peng Jingli Address: Changsha, Hunan rain Flower District No. 488 Shaoshan Road no negative pressure water supply equipment water equipment http://cshuadu168.qqkkaa.com/ http://cshuadu1688.kuyibu.com/ Waldo supply equipment http://www.cshuadu.com/ Ali Pu secondary water supply equipment http://shop1345798006943.cn.1688.com/ equipment http://cshygs.co.bokee.net/ conversion water supply equipment manufacturers http://blog.sina.com.cn/hygs168