German Anwochi aventics ED02 proportional valve spot supply

The control of flow by valves can be divided into two types:German Anwochi aventics ED02 proportional valve spot supplyAVEENTICS/Germany Anwochi R414002408

One type is switch control: either fully open or fully closed, the flow rate is either maximum or minimum, without any intermediate state, such as ordinary electromagnetic through valves, electromagnetic directional valves, and electro-hydraulic directional valves.

Another type is continuous control: the valve port can be opened to any desired degree to control the flow rate. This type of valve can be manually controlled, such as throttle valves, or electronically controlled, such as proportional valves and servo valves.

So the purpose of using proportional valves or servo valves is to achieve throttling control of flow through electronic control (although pressure control can also be achieved through structural modifications). Since it is throttling control, there is inevitably energy loss. Unlike other valves, servo valves have greater energy loss because they require a certain amount of flow to maintain the operation of the front-end control oil circuit.German Anwochi aventics ED02 proportional valve spot supplyAVEENTICS/Germany Anwochi R414002408Automatic control can be divided into intermittent control and continuous control. Intermittent control refers to switch control. In pneumatic control systems, on-off directional valves with lower operating frequencies are used to control the on/off of the pneumatic circuit. Adjust the required pressure with a pressure reducing valve and adjust the required flow rate with a throttle valve. This traditional pneumatic control system requires multiple pressure reducing valves, throttle valves, and directional valves in order to have multiple output forces and multiple motion speeds. In this way, not only do the components need to be numerous, the cost is high, and the system is complex, but many components also require manual adjustment in advance. Electric proportional valve control belongs to continuous control, which is characterized by the output quantity changing with the input quantity, and there is a certain proportional relationship between the output quantity and the input quantity. Proportional control can be divided into open-loop control and closed-loop control.