多功效水泵把持阀的简介、结构及义务事理(国外英文资料).docVIP

多功能水泵控制阀的简介、结构及工作原理(国外英文资料) The pump valve is a professional pump valve network Introduction, structure and working principle of multi-function pump control valve In the feed water pump station, for the centrifugal pump light load startup, usually require close the outlet valve of the pump first, then start the pump unit, when its velocity after the rated speed, and then gradually open the outlet valve; To prevent the flow of medium in the system, the check valve must be installed in the pump outlet. The effective water hammer removal device is also set up due to the instantaneous closure of the normal swing check valve which causes the water hammer to endanger the pump system. More USES is currently supporting electric butterfly valve (brake) micro resistance slow close check valve to achieve the above purpose, but in the field use electric butterfly valve (brake) often appear closed lax, motor burn out and damage such as gear reduction drive mechanism failure: micro resistance slow close check valve to adapt to the narrow range, cannot adapt to the large variation of the flow, pressure, and its regulating needle valve block, such as to the action of damper is not failure, affect the normal safe water supply. Introduction of multi-function pump control valve Multi-function pump control valve is a kind of new hydraulic control valve, one valve can replace the electric butterfly (brake) valve, check valve and water hammer eliminator three kinds of devices. It will be able to automatically drive the pump when the pump is open, and the speed and closure of the pump will not require any electrical control and other power and manpower, and no oil pressure equipment. The main advantages of multi-function pump control valves are: No operation control is needed. The water pressure difference between the valve and the pump is used as the control power, and it has the function of the opening and closing of the pump. (2) the valve opening and closing action can be effectively