1. what is control valve in hydraulic system

Control valves can also work with hydraulic actuators (also known as hydraulic pilots). These types of valves are also known as automatic control valves. The hydraulic actuators respond to changes of pressure or flow and will open/close the valve. Automatic control valves do not require an external power source, meaning that the fluid pressure is enough to open and close them.

Automatic control valves include pressure reducing valves, flow control valves, back-pressure sustaining valves, altitude valves, and relief valves.

categorie005-hydraulic control valve
control valve in hydraulic system
pressure reducing valve 200p working principle
pressure reducing valve 200p working principle

2. pressure reducing valve 200P working principle

The pressure reducing valve is installed in the pipeline, mainly to stabilize the outlet pressure within the set range, to ensure that the outlet pressure does not change due to the change of the inlet pressure, when the outlet pressure is lower than the set value, the valve flap opens under the action of the spring force , the water flows through, when the outlet pressure reaches the set value, the outlet pressure is directly transmitted to the lower part of the diaphragm, and forms a confrontation with the spring, so that the valve disc is closed and the water is cut off.

3. silent check valve dhh44x working principle

When the silent check valve is used in the drainage pipeline, it is installed at the outlet of the pump to prevent the backflow of the medium or eliminate the destructive water hammer when the pump starts to work or to prevent the pressure from starting to rise. The valve disc is opened under the action of the inlet pressure, a large amount of medium passes through, and at the same time, the medium enters the pipe wall cylinder, so that the piston moves to the working position. When the water pump stops or the inlet pressure drops, the valve disc is quickly closed first under the action of the return water pressure. Ninety percent of the time, because the piston is in the working position, the remaining ten percent is closed, which is slowly closed by the piston organization, thereby eliminating the water hammer formed by the rapid closing.

dhh44x silent check valve working principle
dhh44x silent check valve working principle
check valve hh44x working principle
check valve hh44x working principle

4. check valve HH44X working principle

When the check valve is used in the drainage pipeline, it is installed at the outlet of the pump to prevent the backflow of the medium or eliminate the destructive water hammer when the pump starts to work or to prevent the pressure from starting to rise. The valve disc is opened under the action of the inlet pressure, a large amount of medium passes through, and at the same time, the medium enters the pipe wall cylinder, so that the piston moves to the working position. When the water pump stops or the inlet pressure drops, the valve disc is quickly closed first under the action of the return water pressure. Ninety percent of the time, because the piston is in the working position, the remaining ten percent is closed, which is slowly closed by the piston organization, thereby eliminating the water hammer formed by the rapid closing.

5. butterfly check valve hh49x working principle animation

This series of valves are mainly used in the drainage pipes of sewage, clean water, seawater and other media. It can not only prevent the backflow of the medium, but also effectively limit the destructive water hammer and ensure the safety of the pipe shape. When the medium pressure enters the valve, the valve will be eliminated. The flap is opened under the action of the medium, a large amount of medium passes through, and at the same time the medium enters the large oil cylinder, so that the small piston is in the working position. When the pressure of the medium at the inlet of the valve drops and the system pressure medium returns, the small valve flap is quickly closed under the action of the backflow medium. Eighty-five percent, and the remaining 15 percent or so of closure is formed by the slow closure of the small flap tissue, which eliminates the damaging water hammer created by rapid closure.

butterfly check valve working principle
butterfly check valve working principle
pump output control valve k7h44x working principle
pump output control valve k7h44x working principle

6. pump output control valve k7h44x working principle

The pump output control valve is installed in the pipeline, mainly controls the reverse flow of the medium, and at the same time eliminates the destructive water hammer caused by the sudden reverse flow of the medium. When the inlet pressure suddenly decreases and the medium in the pipeline reverses, the check valve on the main valve is closed. The pressure at the outlet end of the main valve enters the control room through the conduit, the pressure in the control room gradually rises, and the main valve flap slowly closes.

7. safety relief valve k8hhx working principle animation

The safety relief valve is installed in the pipeline and mainly hydrolyzes the upstream pressure to the specified downstream pressure to ensure the safety of downstream water. The downstream pressure is set on the pilot valve in advance according to the needs. When the downstream pressure is lower than the set value, the pilot valve will be in Opened under the action of the spring, the pressure water in the control room on the main valve flows to the downstream through the pilot valve, the pressure in the control room is reduced by one, the valve flap is opened under the action of the upstream water, and a large amount of water is supplied to the downstream, and the downstream pressure rises to At the set value, the pilot valve closes, the pressure in the control chamber rises, and the valve closes.

safety relief valve working principle
safety relief valve working principle
water level control valve k9h44x working principle
water level control valve k9h44x working principle

8. water level control valve k9h44x working principle

The water level control valve is mainly used in the automatic water supply system of water tanks, pools and water towers in industrial and mining, enterprises and high-rise buildings to ensure that the liquid level of the pool is within the specified height. Under the action of hydraulic power, when the water level drops, the small float valve opens, and the main valve controls the indoor The water flows to the pool through the floating ball valve, the main valve flap is opened under the action of the inlet pressure water, and a large amount of water is supplied to the pool. When the water level rises to the specified water level, the small floating ball valve closes, the pressure in the control room rises, and the main valve closes.

9. safety relief valve k10h44x working principle animation

The pressure of the valve before the control valve in the pipeline does not exceed or is not lower than the ideal set value to ensure normal upstream water consumption. When the upstream pressure is higher than the pre-set pressure value on the pilot valve, the pilot valve will be at the inlet pressure. Under the action of automatic opening, the pressure water in the control room of the main valve flows to the downstream through the pilot valve, the pressure in the upper control room decreases, the main valve flap opens under the action of the inlet pressure, and starts to release pressure until the inlet pressure is equal to the set value or slightly lower , the pilot valve is automatically closed, the pressure in the control room rises, the main valve is closed, and the upstream pressure is maintained normal.

safety relief valve k10h44x working principle
safety relief valve k10h44x working principle
pressure reducing and sustaining valve y110 working principle
pressure reducing and sustaining valve y110 working principle

10. pressure reducing and sustaining valve y110 working principle

The pressure reducing and sustaining valve is installed in the pipeline, mainly to stabilize the outlet pressure within the set range, to ensure that the outlet pressure does not change due to the change of the inlet pressure. When the outlet pressure is lower than the set value, the valve disc opens under the action of the spring force, and the water flows through , When the outlet pressure rises to the set value, the outlet pressure is directly transmitted under the diaphragm, and forms a confrontation with the spring to close the valve disc and cut off the water.

11. direct actuated pressure reducing valve yz11x working principle animation

Installed in the pipeline, it mainly stabilizes the outlet pressure within the set range to ensure that the outlet pressure does not change due to the change of the inlet pressure. When the outlet pressure is lower than the set value, the valve flap opens under the action of the spring force, and the water flows through. When the outlet pressure rises to the set value, the outlet pressure is directly transmitted under the diaphragm, and forms a confrontation with the spring to close the valve disc and cut off the water flow.

direct actuated pressure reducing valve yz11x working principle
direct actuated pressure reducing valve yz11x working principle
pump control valve zb700x working principle
pump control valve zb700x working principle

12. pump control valve zb700x working principle

The pump control valve is installed in the pipeline and mainly controls the backflow of the medium when the water pump is stopped, and prevents the water hammer caused by the backflow of the medium, so as to ensure the safe stop of the pump. The pressure water in the control room flows to the downstream through the one-way valve at the outlet, and the main valve disc is in easy operation. When the pump starts to stop, the main valve disc is quickly closed by 90% under the action of the backflow water, and the pressure in the main control room is The water is supplied from the inlet end. At this time, the solenoid valve is opened when the control of the switch is turned off, and the pressure water in the control is slowly supplied from the outlet end, so that the remaining ten percent of the main valve flap is slowly closed, eliminating the need for Destructive water hammer.

13. pressure reducing and sustaining valve zc500x working principle animation

The pressure of the valve before the control valve in the pipeline does not exceed or is not lower than the ideal set value to ensure normal upstream water consumption. When the upstream pressure is higher than the pre-set pressure value on the pilot valve, the pilot valve will be at the inlet pressure. Under the action of automatic opening, the pressure water in the control room of the main valve flows to the downstream through the pilot valve, the pressure in the upper control room decreases, the main valve flap opens under the action of the inlet pressure, and starts to release pressure until the inlet pressure is equal to the set value or slightly lower , the pilot valve is automatically closed, the pressure in the control room rises, the main valve is closed, and the upstream pressure is maintained normal.

pressure reducing and sustaining  valve zc500x working principle animation
pressure reducing and sustaining valve zc500x working principle animation
hydraulic electric control valve zd600x working principle
hydraulic electric control valve zd600x working principle

14. hydraulic electric control valve zd600x working principle

The valve is in the pipeline, and it can be opened or closed by remote and local remote control, and the medium in the pipe is controlled to flow or cut off. When the valve needs to be opened, the start button is turned on in advance, the solenoid valve is energized, and the main valve controls the indoor pressure water. The valve flows to the outlet, the pressure in the control chamber decreases, the main valve disc opens, and a large amount of water starts to flow. When the stop button is clicked, the solenoid valve is closed due to power failure, the pressure in the main valve chamber rises, the main valve disc is closed, and the water flow stops.

15. combined pressure reducing and relief valve zfy47t working principle animation

The pressure of the valve before the control valve in the pipeline does not exceed or is not lower than the ideal set value to ensure normal upstream water consumption. When the upstream pressure is higher than the pre-set pressure value on the pilot valve, the pilot valve will be at the inlet pressure. Under the action of automatic opening, the pressure water in the control room of the main valve flows to the downstream through the pilot valve, the pressure in the upper control room decreases, the main valve flap opens under the action of the inlet pressure, and starts to release pressure until the inlet pressure is equal to the set value or slightly lower , the pilot valve is automatically closed, the pressure in the control room rises, the main valve is closed, and the upstream pressure is maintained normal.

combined pressure reducing and relief valve zfy47t working principle
electric remote control valve zj145x working principle
electric remote control valve zj145x working principle

16. electric remote control valve zj145x working principle

The valve is mainly used in various drainage systems of industrial and mining, enterprises, high-rise buildings and power stations. It can be opened or closed according to electrical signals or manual operation. When the inlet solenoid valve and the outlet solenoid valve are energized, the inlet solenoid valve is turned from open to closed, and the outlet solenoid valve is turned from closed to open. Otherwise, the main valve is closed.

17. emergency shut off valve zj900x working principle animation

The valve is mainly used in parallel water supply systems of industrial and mining enterprises, domestic water, and fire water. When the fire protection system needs water, open the ball valve at the inlet of the valve and close the ball valve at the outlet at the same time, the inlet pressure directly enters the pilot valve control room, so that the pilot valve is closed, the pressure in the main valve room rises, the main valve is closed, and the downstream For domestic water, when the fire is over, open the ball valve at the outlet and close the ball valve at the inlet at the same time, and the domestic water will return to normal.

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