water conservancy project

water conservancy project

The hydraulic control valve is driven by the pressure difference △ p between the upstream and downstream of the pipeline system, and controlled by the pilot valve to make the diaphragm (piston) hydraulically operated in a differential manner, which is completely automatically adjusted by water, so that the main valve disc is fully opened, fully closed or in a regulated state. When the pressure medium entering the control room above the diaphragm (piston) is discharged to the atmosphere or the downstream low-pressure area, the pressure value acting on the bottom of the valve disc and below the diaphragm is greater than the pressure value above, and the main valve disc is pushed to the fully open position by relying on the pipeline medium: when the pressure medium entering the control room above the diaphragm (piston) cannot be discharged to the atmosphere or the downstream low-pressure area, The pressure above the diaphragm (piston) is greater than the pressure below, and the medium in the pipeline presses the main valve disc to the fully closed position; When the pressure value in the control room above the diaphragm (piston) is between the population pressure and the outlet pressure, the main valve disc is in the regulating state, and its regulating position depends on the joint control effect of the needle valve and the adjustable pilot valve in the attached pipeline system.

The hydraulic control valve is driven by the pressure difference △ p between the upstream and downstream of the pipeline system, and controlled by the pilot valve to make the diaphragm (piston) hydraulically operated in a differential manner, which is completely automatically adjusted by water, so that the main valve disc is fully opened, fully closed or in a regulated state. When the pressure medium entering the control room above the diaphragm (piston) is discharged to the atmosphere or the downstream low-pressure area, the pressure value acting on the bottom of the valve disc and below the diaphragm is greater than the pressure value above, and the main valve disc is pushed to the fully open position by relying on the pipeline medium: when the pressure medium entering the control room above the diaphragm (piston) cannot be discharged to the atmosphere or the downstream low-pressure area, The pressure above the diaphragm (piston) is greater than the pressure below, and the medium in the pipeline presses the main valve disc to the fully closed position; When the pressure value in the control room above the diaphragm (piston) is between the population pressure and the outlet pressure, the main valve disc is in the regulating state, and its regulating position depends on the joint control effect of the needle valve and the adjustable pilot valve in the attached pipeline system.