The difference between pneumatic valve and electric valve

Update:26-01-2019
Summary:

With the continuous improvement of technology, pneumati […]

With the continuous improvement of technology, pneumatic valves and electric valves have replaced the use of manual valves in many working conditions. Many users are not sure how to choose to use pneumatic valves and electric valves. To properly select pneumatic and electric valves, first understand the comparison between pneumatic and electric valves.

Pneumatic valves and electric valves are equipped with various types of valves by electric actuators and pneumatic actuators, which are used for automatic control instead of manual valves in working conditions. The difference between the two types of valves is the difference between the driving sources. How to choose these two valves in actual use depends mainly on which valve is suitable for the actual working conditions. The general differences between the two valves are described below.

First, the operating time of the pneumatic valve is faster than that of the electric valve. Moreover, the pneumatic valve can be repeatedly opened in a short time, and the electric valve switching frequency is too high, which will cause the motor to heat up. Therefore, pneumatic valves are more suitable for applications that require quick shut-off. Because the electric valve actuators are all electronic components, sparks are easily generated in the event of a fault.

Therefore, pneumatic valves are more suitable for use in flammable and explosive environments than electric valves. In terms of maintenance, pneumatic valves are easy to maintain and have low technical requirements for maintenance personnel. Electric valves are the opposite. However, the maintenance cost of the pneumatic valve is much higher than the electric valve. In terms of field conditions, the use of  check valve requires a gas source at the site, and the electric valve can be used when the power is turned on. This is much more convenient than pneumatic valves.