bottom valve is a kind of energy-saving valve, generally installed in the pump suction at the bottom of the underwater. Restrict fluid return pump pipe water into play not only the function. Valve cover have a number of water supplies and strengthen the tendons, played a hard block, mainly used in pumping the tube on the road. watercourses and supporting role. caliber with Rosa xanthina, double-valve, multi-jaw type. a flange connection and thread connection.

Structure and principle:

Estimated by the  valve flap, valve cover, bushings, seals and other components formed, see figure below the water into the water from the valve cover body. In the fluid under pressure, the valve flap to open water, when the show stopped After the exit pipe of the pressure to quickly close the flap valve, liquid water would not back down and played a flow that saves water pumping losses role.