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Hydraulic Valve Combined Use
Jul 20, 2017

Hydraulic valve is a pressure oil operation of the automation components, Hydraulic Valve which is controlled by the pressure valve oil pressure, usually combined with the use of electromagnetic pressure valve can be used for long-distance control of hydropower station oil, gas,Hydraulic Valve water pipe system off. Commonly used in clamping, Hydraulic Valve control, lubrication and other oil. There are direct and pilot type of the points, multi-use pilot type.

Used to reduce and stabilize the system in a branch of the oil pressure, commonly used in clamping, control, lubrication and other oil. Direct-type, pilot type, superposition of the points.

According to the use of one-way valve and valve. Check valve: only allows the fluid in the pipeline in one direction, reverse that cut off.Hydraulic Valve Directional valve: change the relationship between the different pipe between the break. According to the number of the control of the number of channels in two, three, Hydraulic Valve four, five, etc.; Hydraulic Valve according to the spool drive way manual, mobile, Hydraulic Valve electric , Hydraulic and so on.

According to the use of overflow valve, pressure relief valve and sequence valve.

 ⑴ relief valve: to control the hydraulic system to achieve the set pressure to maintain a constant state. A relief valve for overload protection is called a safety valve. Hydraulic Valve When the system fails, Hydraulic Valve the pressure rises to the limit may cause damage, Hydraulic Valve the valve port will open and overflow, to ensure the safety of the system. 

⑵ pressure reducing valve: can control the branch circuit to get lower than the main circuit pressure and low pressure. Decompression valve according to its control of the pressure function is different, Hydraulic Valve but also divided into the value of the pressure relief valve (output pressure is constant) ﹑ differential pressure valve (input and output pressure difference is set) and the ratio of pressure reducing valve (The input and output pressure to maintain a certain ratio).

 ⑶ sequence valve: can make an implementation of components (such as hydraulic cylinders, hydraulic motors, etc.) after the action, and then in order to make other elements of the action. The pressure generated by the pump first to promote the movement of the hydraulic cylinder 1,Hydraulic Valve while the inlet valve through the sequence of action on the area A, when the hydraulic cylinder 1 after the movement is complete, the pressure increases, the role of the upward thrust in the area A greater than the spring Value, the spool up so that the inlet and outlet port connected to the hydraulic cylinder 2 movement.

The flow rate is adjusted by adjusting the area of the orifice between the valve plug and the valve body and the local resistance it produces to control the speed of movement of the actuator. Flow control valves are divided into five types.

 ⑴ throttle valve: in the adjustment of the orifice area, Hydraulic Valve can make the load pressure is not changed and the movement uniformity of the implementation of the component is not high speed basically stable. 

⑵ speed control valve: the load pressure changes can keep the throttle valve inlet and outlet pressure for the fixed value. In this way, after the throttle area is set,Hydraulic Valve regardless of how the load pressure changes, the governor can keep the flow through the throttle constant, thus stabilizing the speed of the actuator.

 ⑶ diverter valve: regardless of the size of the load, can make the same oil source of the two actuators are equal flow equal to the diversion valve or synchronous valve; Hydraulic Valve get proportional distribution of the proportion of the flow distribution valve. 

⑷ collector valve: the role of the opposite with the diversion valve, so that the flow into the flow of the proportional distribution of the valve. 

⑸ shunt flow valve: both flow distribution valve and two functions.

1) flexible action, the role of reliable, Hydraulic Valve the impact of work and vibration, noise, long life.

2) When the fluid passes through the hydraulic valve, Hydraulic Valve the pressure loss is small; when the valve port is closed, Hydraulic Valve the sealing performance is good, the internal leakage is small, no leakage.

3) The controlled parameters (pressure or flow) are stable and subject to external disturbances.

4) compact, installation, commissioning, use, easy maintenance, good versatility.


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