Cast steel flow and pressure regulating valve is a key component used to regulate liquid flow and pressure, widely used in various hydraulic systems.
1、 Structural composition
Valve body: As the main body of the entire valve, it bears the pressure of the liquid.
Piston: It is driven by a crank slider mechanism to achieve an axially symmetrical annular flow channel.
Piston guide rail: ensures the stability and accuracy of piston movement.
Built in crank slider mechanism: used to drive piston movement and control flow area.
Sealing: Ensure that the valve is leak free during operation.
Internal components: including springs, adjustment devices, etc., used to regulate flow and pressure.
2、 Working principle
1. Liquid entering the valve body: After entering the valve body through the inlet, the liquid will pass through the flow channel on the piston.
2. Piston motion: The crank slider mechanism drives the piston to move, changing the cross-sectional area of the flow channel.
3. Adjust flow rate and pressure: As the cross-sectional area of the flow channel changes, the flow rate and pressure of the liquid will also change accordingly. By creating multiple holes in the circumferential direction, a jet collision is formed towards the center of the pipeline, thereby achieving the purpose of energy dissipation, pressure reduction, and flow regulation.
3、 Characteristics
1. Not afraid of sewage blockage: Its structural design and material selection make it not afraid of sewage blocking the slide, not afraid of scaling, and not easy to get stuck.
2. Automatic adjustment: It can automatically adjust the pre-set pipeline medium parameter values to maintain a constant value within a certain accuracy, and the accuracy range can also be adjusted.
3. Anti cavitation characteristics: The rib plate on the inner wall of the valve body also serves as a rectifier plate, which can disperse water flow and prevent cavitation. At the same time, it also reduces the noise of the valve and the vibration of the piston.
4. Control system: The control system can use integrated electronic circuits, which are small in size, reliable, highly sensitive, and easy to install and debug.
4、 Selection
Work pressure and temperature: Ensure that the valve can operate normally under the predetermined working conditions.
Flow range: Select valves that can meet the needs of flow regulation.
Medium characteristics: Select appropriate materials and structures based on the properties of the medium, such as corrosiveness, viscosity, etc.
Installation space: Consider the space limitations of valve size and installation location.