Features of Solenoid Operated Directional Valves

1. The external leakage is blocked, the internal leakage is easy to control, and it is safe to use

Internal and external leakage is an element that endangers safety. Other automatic control valves usually extend the valve stem, and the rotation or movement of the spool is controlled by electric, pneumatic, or hydraulic actuators. This must solve the problem of external leakage of the dynamic seal of the long-term action valve stem; only the solenoid valve is completed by using electromagnetic force to act on the iron core sealed in the magnetic isolation sleeve of the electric control valve. There is no dynamic seal, so the external leakage is easy to block. . The torque control of the electric valve is not easy, and it is easy to cause internal leakage, or even break the head of the valve stem; the structure of the solenoid valve is easy to control the internal leakage until it is reduced to zero. Therefore, the solenoid valve is particularly safe to use, especially suitable for corrosive, toxic or high and low temperature media.

2. The system is simple, easy to connect to the computer, and the price is low

The solenoid valve itself has a simple structure and low price, and is easier to install and maintain than other types of actuators such as regulating valves. What's more remarkable is that the composed automatic control system is much simpler and the price is much lower. Since the solenoid valve is controlled by a switch signal, it is very convenient to connect with the industrial computer. In today's era when computers are popular and prices have dropped sharply, the advantages of solenoid valves are even more obvious.

3. Express action, small power, light and compact appearance

The response time of the solenoid valve can be as short as several milliseconds, and even the pilot solenoid valve can be controlled within tens of milliseconds. Due to its self-contained circuit, it is more sensitive than other automatic control valves. The power consumption of a properly designed solenoid valve coil is very low, which is an energy-saving product; it can also be achieved by triggering the action and automatically maintaining the valve position without consuming any power at ordinary times. The shape and size of the solenoid valve are small, which not only saves space, but also is light and beautiful.

4. The adjustment accuracy is limited and the applicable medium is limited

The solenoid valve usually only has two states of switch, the valve core can only be in two limit positions, and it cannot be adjusted continuously, so the adjustment accuracy is still limited.

Solenoid valves have high requirements on the cleanliness of the medium, and the medium containing particles cannot be used. If it is an impurity, it must be filtered out first. In addition, viscous media cannot be applied, and the viscosity range of specific products is relatively narrow.

5. Variety of models and wide range of uses

Although solenoid valves have inherent deficiencies, their advantages are still very prominent, so they are designed into a variety of products to meet various needs and have a wide range of uses. The advancement of solenoid valve technology also revolves around how to overcome inherent deficiencies and how to better utilize inherent advantages.