First, the multi-function pump control valve Structural features 
 Multi-function pump control valve by the main valve and control valve and take over the system, the valve body with a DC valve, the main valve control chamber for the diaphragm or piston double control room structure, Control room than the general increase of a hydraulic control valve, an increase of the main valve control functions, to achieve a slow opening of the pump outlet, fully open, slow closing, cut-off and other multi-functional control, a valve, a regulation of the pump Multi-outlet control. 
 
 The product takes over the control system using the valve control, by setting the opening of the control valve can be easily achieved all the necessary control parameters, such as the opening of the main valve speed, slow closing speed and so on. 
 
 Second, the principle of multi-function pump control valve 
 When the pump starts, the pressure acting on the main valve plate below the control room and the lower chamber, the pressure to open the main valve, the control room after the water chamber slowly through the control valve B To the outlet, the main valve slowly open. Setting the opening of the control valve results in a proper main valve opening speed. When the pump stops working, the water pressure at the inlet decreases rapidly, most of the opening is quickly closed under dead weight and spring pressure to prevent the water from flowing back. The remaining opening degree is controlled by the combination of the water pressure in the upper chamber and the water pressure in the lower chamber Slowly shut down, slow down the closure of the formation of a buffer to prevent the pressure surge. 
 
 Set the control valve A, B opening and opening ratio can be a suitable valve opening and closing speed. 
 
 Third, the multi-function pump control valve working characteristics 
 1, to prevent the water hammer effect is good, the slow open, check the closure speed, slow closing, etc. to eliminate water hammer technology integration, to prevent the pump does not hammer and stop the pump back and water hammer Water supply pipe and pump damage. 
 
 2, easy to operate, no need to reprovision the valve with electronic control system, the valve with the pump to open and stop automatically and in order to complete the control function. By setting the valve opening degree can get the appropriate control parameters. 
 
 3, the valve body with a full channel, DC, streamlined design. Small hydraulic loss, energy-saving effect. 
 
 Four,Multifunctional pump control valve function and purpose 
 The valve is installed on the pump outlet, the order to achieve a slow opening, full open, closed fast, slow closing and other functions. 
 
 This product is used in high-rise building water supply system and other water supply system of the pump outlet pipeline, to prevent and reduce the water hammer on the pipeline when the water hammer start and stop water to prevent water back to protect the pump to maintain pipeline safety.

Five, multi-function pump control valve main technical parameters

 Sixth, multi-function pump control valve main parts and materials

 Seven, multi-function pump control valve parts list:
 1, the main valve 2, the flow control valve 3, the filter

 Eight, multi-function pump control valve connection size