Hydraulic threaded cartridge check valve CV16-20-05 flow valve

Proportional valve is a new type of hydraulic control device.

In the ordinary pressure valve, flow valve and direction valve, the proportional electromagnet is used to replace the original control part, and the pressure, flow or direction of the oil flow is controlled remotely according to the input electrical signal continuously and proportionally. Proportional valves generally have pressure compensation performance, and the output pressure and flow rate can be unaffected by load changes

1, the ordinary valve can not be proportional to the continuous step control, is a pure single action type switch valve, the valve opening direction, opening amount or spring setting force are certain, can not change according to the actual situation.

2, proportional valve is proportional to the continuous step control, according to the actual situation changes in the information collected back to the target automatic compensation control, the valve opening direction, opening amount or spring setting force are followed, to achieve a series of continuous controllable changes in the action.

Valve control of flow can be divided into two kinds: one is switch control: either fully open, or fully closed, the flow rate is either Zda, or Z small, there is no intermediate state, such as ordinary electromagnetic through valve, electromagnetic reversing valve, electro-hydraulic reversing valve.

The other is continuous control: the valve port can be opened according to the need of any degree of opening, thereby controlling the size of the flow through, such valves have manual control, such as throttle valves, but also electronically controlled, such as proportional valves, servo valves.