Practical Application of Multifunctional Pump Control Valve

Multifunctional pump control valve is a new type of hydraulic valve with automatic operation in the whole process. It can fully realize the slow opening when the centrifugal pump is started, and two-stage fast closing and slow closing when it is stopped, so as to prevent the backflow of medium in the pipeline. The valve can replace the water hammer eliminator of operation valve, double speed valve and slow closing check valve in the pump outlet pipeline at the same time.

2. Some characteristics of design
1) The main valve plate and the stem form sliding fit, the valve plate opening changes with the flow rate, so that it is close to zero flow to close, to eliminate the ideal state of water hammer.
2) The diaphragm design is adopted in the control room to avoid the switching failure caused by the resistance of the control room of the piston cylinder. At the same time, the action pressure is reduced. The diaphragm material was reinforced with neoprene reinforced with nylon fiber net, and its service life can reach 650000 times.
3) Compared with the swing check valve, the power consumption is reduced by 31%. The design reduces the weight of the main valve plate. Streamlined and spacious seat design. The resistance coefficient is 3.8, which is much lower than that of swing check valve with resistance coefficient of 5.6.
4) The valve cover is easy to repair and the valve cover is wide. All parts in the valve can be removed without removing the connecting flange.

3. Use effect
1) In order to meet the requirements of centrifugal pump shutdown and start-up, it can ensure that the pump motor can start under light load, without electricity and oil pressure. It can directly control the start and stop of the pump. It not only completely solves the water hammer impact and medium backflow caused by sudden power failure, but also greatly reduces the labor intensity of workers.
2) The effect of eliminating water hammer is ideal. When the pump stops, the valve is stable, quiet and vibrates, and the valve is closed tightly. Because the control valve is completely controlled by hydraulic pressure, no special management is needed.