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DR5 Pilot Pressure Reducing Valve
DR5 pilot pressure reducing valve is a pressure control element widely used in hydraulic systems. The following is introduced from its structure, working principle, functional characteristics, technical parameters and applications:
1. Structural composition
The DR5 pilot pressure reducing valve mainly consists of two parts: the main valve and the pilot valve. The main valve is responsible for controlling the on-off and flow rate of the fluid to adjust the pressure; the pilot valve is used to sense the changes in outlet pressure and control the action of the main valve according to the set value. In addition, there are usually springs, diaphragms (or pistons) and other components to assist in the regulation and control of pressure.
2. Working principle
Before starting state: Before the pressure reducing valve is started, the main valve spool is in the closed or initial position under the action of spring force. At this time, the main valve port is in the closed or small opening state to prevent fluid from passing through. The pilot valve is also closed, isolating the upper chamber of the main valve from the outlet pressure.
Starting and preliminary pressure reduction: When fluid enters the inlet of the pressure reducing valve, the fluid pressure acts on the main valve core. If the inlet pressure is higher than the pressure value set by the pilot valve, the pilot valve will open. Some fluid enters the upper chamber of the main valve from the inlet through the pilot valve. Since the area of the upper chamber of the main valve is greater than the area below the main valve core, according to the Pascal principle, the pressure of the upper chamber will generate a downward force, which will push the main valve core downward, increase the opening of the main valve opening, and the fluid can flow from the inlet to the outlet, achieving preliminary pressure reduction.
Pressure stabilization regulation: As the fluid flows to the outlet, the outlet pressure will gradually increase. The outlet pressure acts onto the diaphragm (or piston) of the pilot valve through the feedback channel. When the outlet pressure reaches the set pressure of the pilot valve, the force exerted by the diaphragm (or piston) of the pilot valve reaches equilibrium, and the pilot valve begins to close, reducing the amount of fluid entering the upper chamber of the main valve. The pressure in the upper chamber of the main valve gradually decreases. Under the action of the spring force and the inlet and outlet pressure difference, the main valve core moves upward, reducing the opening of the main valve opening, thereby limiting the fluid flow and maintaining the outlet pressure at the set value.
Dynamic balance maintenance: During actual work, the outlet pressure will fluctuate due to changes in downstream gas usage and other factors. When the outlet pressure increases, the pilot valve will be further closed, the upper chamber pressure of the main valve increases, the opening of the main valve opening decreases, the outlet flow rate is reduced, and the outlet pressure is reduced; conversely, when the outlet pressure is reduced, the pilot valve will be opened, the upper chamber pressure of the main valve decreases, and the opening of the main valve opening increases, and the outlet flow rate is increased, and the outlet pressure is increased. Through such a dynamic adjustment process, the pilot pressure reducing valve can always maintain the outlet pressure within a set range, achieving precise pressure control.
3. Functional characteristics
The structure is novel and reasonable: combined with the hydraulic principle, the structure is more reasonable and efficient.
Stable and reliable work: Excellent performance when high flow is passed, the valve disc opens and closes slowly, reduces the impact of the water hammer and ensures smooth work.
High pressure reduction and stabilization accuracy: keep the outlet pressure stable when the inlet pressure and flow rate change.
Large adjustment range: adapt to different working pressure needs.
Good sealing performance: Ensure long service life.
Easy to install and repair: The design makes the installation and repair process relatively simple and convenient.
DR5 pilot pressure reducing valve is a pressure control element widely used in hydraulic systems. The following is introduced from its structure, working principle, functional characteristics, technical parameters and applications:
1. Structural composition
The DR5 pilot pressure reducing valve mainly consists of two parts: the main valve and the pilot valve. The main valve is responsible for controlling the on-off and flow rate of the fluid to adjust the pressure; the pilot valve is used to sense the changes in outlet pressure and control the action of the main valve according to the set value. In addition, there are usually springs, diaphragms (or pistons) and other components to assist in the regulation and control of pressure.
2. Working principle
Before starting state: Before the pressure reducing valve is started, the main valve spool is in the closed or initial position under the action of spring force. At this time, the main valve port is in the closed or small opening state to prevent fluid from passing through. The pilot valve is also closed, isolating the upper chamber of the main valve from the outlet pressure.
Starting and preliminary pressure reduction: When fluid enters the inlet of the pressure reducing valve, the fluid pressure acts on the main valve core. If the inlet pressure is higher than the pressure value set by the pilot valve, the pilot valve will open. Some fluid enters the upper chamber of the main valve from the inlet through the pilot valve. Since the area of the upper chamber of the main valve is greater than the area below the main valve core, according to the Pascal principle, the pressure of the upper chamber will generate a downward force, which will push the main valve core downward, increase the opening of the main valve opening, and the fluid can flow from the inlet to the outlet, achieving preliminary pressure reduction.
Pressure stabilization regulation: As the fluid flows to the outlet, the outlet pressure will gradually increase. The outlet pressure acts onto the diaphragm (or piston) of the pilot valve through the feedback channel. When the outlet pressure reaches the set pressure of the pilot valve, the force exerted by the diaphragm (or piston) of the pilot valve reaches equilibrium, and the pilot valve begins to close, reducing the amount of fluid entering the upper chamber of the main valve. The pressure in the upper chamber of the main valve gradually decreases. Under the action of the spring force and the inlet and outlet pressure difference, the main valve core moves upward, reducing the opening of the main valve opening, thereby limiting the fluid flow and maintaining the outlet pressure at the set value.
Dynamic balance maintenance: During actual work, the outlet pressure will fluctuate due to changes in downstream gas usage and other factors. When the outlet pressure increases, the pilot valve will be further closed, the upper chamber pressure of the main valve increases, the opening of the main valve opening decreases, the outlet flow rate is reduced, and the outlet pressure is reduced; conversely, when the outlet pressure is reduced, the pilot valve will be opened, the upper chamber pressure of the main valve decreases, and the opening of the main valve opening increases, and the outlet flow rate is increased, and the outlet pressure is increased. Through such a dynamic adjustment process, the pilot pressure reducing valve can always maintain the outlet pressure within a set range, achieving precise pressure control.
3. Functional characteristics
The structure is novel and reasonable: combined with the hydraulic principle, the structure is more reasonable and efficient.
Stable and reliable work: Excellent performance when high flow is passed, the valve disc opens and closes slowly, reduces the impact of the water hammer and ensures smooth work.
High pressure reduction and stabilization accuracy: keep the outlet pressure stable when the inlet pressure and flow rate change.
Large adjustment range: adapt to different working pressure needs.
Good sealing performance: Ensure long service life.
Easy to install and repair: The design makes the installation and repair process relatively simple and convenient.
