Multifunctional pump control valve brief
Zhoushan Dinghai Jinsheng Bimetallic Plastic Machinery Factory (General Partners) , https://www.jinshenggalloy.com
January 16 09:05:48, 2023
Multifunctional pump control valve works: Multifunctional pump control valve also has a gate valve, check valve, water hammer eliminator three kinds of valve. These three valves play different roles in the operation of the pump. Gate valve function is usually in the closed valve state, the valve starts slowly open the valve, the pump down, the valve slowly closed first. Pump closed and closed parking brake, can effectively prevent the pump water hammer and pump stop water hammer at the same time, reduce the motor load when the pump starts, the pump at zero flow when the shaft power minimum, generally only the design axis 30% of power. Another function of the gate valve is that when the gate valve is closed, the valve and the pump installed between the gate valve and the pump can be provided with safe maintenance conditions to prevent the water return of the pressure pipe. Check valve function Check valve to prevent sudden power outages caused by changes in the flow of water to prevent backflow. Sudden closure of check valve easy to produce water hammer phenomenon. When the geometry of the pump is high, the severe water hammer instantaneous high pressure can cause the pipe to rupture and serious production accidents occur. The function of water hammer eliminator The water hammer eliminator can effectively eliminate the irregular water shock waves that occur in the water hammer and surge of various fluids in the transmission system without stopping the fluid flow so as to eliminate Destructive shock wave, play a protective purpose. Therefore, in order to prevent water hammer on the water pipeline damage methods, often in the water pump pressure pipe to install water hammer eliminator. The overall size of the multi-function pump control valve is equivalent to that of the ordinary check valve, and consists of the main valve and the external accessories (bypass pipe system). Among them, the main valve includes the valve body, pressure plate and diaphragm, the main valve plate, slow closing valve plate, valve seat, stem assembly and other components. Slow valve plate assembly with the pressure plate and the diaphragm connected together, the diaphragm pressed between the bonnet and the diaphragm seat, the diaphragm up and down movement slow down valve plate up and down. Stem through the center of the main valve plate hole so that the main valve plate can slide along the stem within a certain range. Multifunctional pump control valve external accessories installed on both sides of the valve diaphragm and the valve into and out of the pipe, diaphragm and valve inlet side of the lower connection pipe is equipped with control valves, filters and a special anti-stop Valve; the diaphragm cavity and the valve on the water side of the connection pipe only filter and a special check valve. The movement of the main valve plate and the slow closing valve plate determines the change of the working state of the valve. Valve external accessories at any time before and after the valve pressure changes delivered to the valve by the diaphragm into the cavity and the lower chamber to control the main valve plate and slow closing valve plate movement and can be adjusted by changing the main valve plate and slow closing valve Plate speed, so that the valve opening and closing time within the prescribed range. 1 multi-function pump control valve in the parked state, the valve plate (the main valve, slow valve plate) in the outlet end and diaphragm cavity under static pressure all closed. 2 start the pump, the water from the valve before the bypass pipe into the diaphragm under the diaphragm to push the diaphragm upward movement of diaphragm cavity water discharge valve outlet pipe, the main valve plate and slow closing valve plate at the inlet and the diaphragm under the chamber Water pressure slowly open. 3 In the water inlet pressure, the valve plate rose to the maximum opening state, the opening height by the flow of the decision. 4 sudden stop pump flow and pressure suddenly decreased, the main valve plate under gravity began to slide down. 5 multi-function pump control valve When the flow is close to zero, the main valve is closed, the main valve plate has a bleed hole to weaken the impact of water hammer, the main valve plate, forming a pressure difference, the valve outlet water from the bypass pipe Into the diaphragm on the cavity to promote the diaphragm platen downward movement of the diaphragm under the water into the valve inlet pipe, slow closing valve plate in the diaphragm under the action of water began to slow closure. 6 slow closing valve plate completely close the drain hole, the valve back to the initial state of the pump. The overall size of the valve is equivalent to the normal check valve, the main valve and external accessories. Among them, the main valve includes valve body, pressure plate and diaphragm, large valve plate, slow closing valve plate, valve seat, stem assembly and other components. Slow valve plate assembly with the pressure plate and the diaphragm connected together, the diaphragm pressed between the bonnet and the diaphragm seat, the diaphragm up and down movement slow down valve plate up and down. Stem through the center of the large hole in the valve plate, because of the large valve plate can slide along the stem within a certain range. Normally, the large valve plate is pressed against the valve seat by its own weight, so that the valve is closed. Multifunctional pump control valve external accessories installed on both sides of the valve diaphragm and the valve into and out of the pipe, diaphragm and valve inlet side of the lower connection pipe is equipped with control valves, filters and a special anti-stop valve. The upper chamber of the diaphragm and the outlet side of the valve are provided with a filter and a control valve only. Main valve in the valve plate and the slow closing plate movement and the location of the valve determines the status changes and opening and closing. Valve external fittings and piping at any time before and after the valve pressure changes delivered to the valve by the diaphragm into the upper chamber and the lower chamber to control the large valve plate and slow closing valve plate movement and accessories can be adjusted by changing the large valve plate and Slow closing valve plate speed, so that the valve opening and closing time within the prescribed range. Working pressure This type of multi-function pump control valve working pressure points 1.0MPa, 1.6MPa, 2.5MPa, 4.0MPa, 6.4MPa, 10.0MPa six kinds of action pressure greater than or equal to 0.03MPa, medium temperature 0 - 80 ℃, slow closing time can be adjusted in 3-120s, the pipeline pressure loss of 2m / s when the pressure loss is less than 0.01MPa, water hammer peak less than 1.5 times the working pressure, nominal diameter DN50-DNl400.