A pipeline control valve works an independent, open valve: When Kai pump water through the inlet end of the pressure valve 8, 9 and micro filter blocking control valve 10 leads to the lower chamber chamber, push lever line, while large 2 small valve plate driven hydraulic valve plate at 12 with a slow push to open, complete open valve. Pressure water through the needle into the buffer device 3 6 piston chamber, so that the buffer piston rod. 2, off valve: When the pump stops, the valve inlet side pressure is lower than a predetermined value, large quick closing valve plate 2 under the action of gravity, cut off most of the water, buffering device to prevent impact of the sealing surface, the cavity through the media 6 back to the needle valve inlet side. Automatically open the small valve plate 12, in addition to the outlet end portion back vent water, reduce water hammer peak. The outlet end of the return pressure valve 4 water filter 5 through the control chamber into the chamber, push the lever down, slowly making small valve plate 12 is closed, to achieve off valve.