What are the introductions of proportional valves?

Proportional valve is a new type of hydraulic control device. On ordinary pressure valves, flow valves and directional valves, proportional electromagnets are used to replace the original control part, and the pressure, flow or direction of oil flow can be controlled continuously and proportionally according to the input electrical signal. Proportional valves generally have pressure compensation performance, and the output pressure and flow can not be affected by load changes.

With the development of hydraulic transmission and hydraulic servo system, there are some hydraulic systems that require continuous control of pressure, flow and direction, and do not require high control accuracy. Because ordinary hydraulic components cannot meet certain servo requirements, and the use of electro-hydraulic servo valves is too wasteful due to low control accuracy requirements, in recent years, there have been continuous control) between proportional control valves.

The electro-hydraulic proportional control valve (proportional valve for short) is essentially a cheap electro-hydraulic control valve with good anti-pollution performance. The development of proportional valves has gone through two paths. One is to replace the manual adjustment input mechanism of traditional hydraulic valves with proportional electromagnets. On the basis of traditional hydraulic valves: various proportional direction, pressure and flow valves are developed; On the basis of electro-hydraulic servo valve, electro-hydraulic servo valve manufacturers have developed after reducing the design and manufacturing accuracy.