A pneumatic valve usually refers to a valve driven by compressed air. When using pneumatic valves, it is usually necessary to configure some auxiliary parts to enhance the performance of pneumatic valves or improve the efficiency of pneumatic valves. Common accessories for pneumatic valves include air filters, directional solenoid valves, limit switches, electronic positioners, and so on.
Pneumatic technology will be air filters, pressure-reducing valves, oil mist three air source processing components assembled, known as the pneumatic triplex. Used in the pneumatic instrumentation of the air source purification and filtration and depressurization to the instrumentation to supply the nominal pressure of the air source. The article on the pneumatic triplex, limit switch (switch indicator), and the role of the solenoid valve to do a detailed introduction:
1. Filter
The pneumatic valve triplet in the role of the air filter is to filter the water in the air source. Because most of the air is not purified, containing water, and water in the air source will cause damage to the solenoid valve, cylinder, and valve. So the air source into the valve before the need to connect the air filter to reduce water.
There are two types of filters, one is automatic drainage and the other is manual drainage.
Automatic drainage is more expensive but easy to use. The filter sets the air pressure and humidity proportional to the amount of water when the amount of water reaches a limit level, and then automatically drains. Manual drainage requires manual drainage at least once a month.
2. solenoid valve
The pneumatic valve through the solenoid valve controls the expansion and contraction, to control the role of the valve switch. In general, a 3/2way solenoid valve is usually used with single-acting pneumatic actuators. A 5/2-way solenoid valve is usually used with double-acting pneumatic actuators.
3. limit switch
Because of the valve device in the pipeline. We can not directly see the valve switch state and observe the valve opening. Limit switch, also known as a valve position indicator. It’s through linkage with the cylinder spindle point to the valve opening. So you can visualize the valve outside the switching state.
