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Imported pneumatic valve fittings types and selection instructions

In the use of pneumatic valves, it is usually necessary to configure some auxiliary components to improve the performance of pneumatic valves or to improve the efficiency of pneumatic valves. Common accessories for pneumatic valves include: air filters, reversing solenoid valves, limit switches, electrical positioners, etc. In the pneumatic technology, the three air source treatment components of the air filter, the pressure reducing valve and the oil mister are assembled together and called a pneumatic triple joint, which is used to enter the air source of the pneumatic instrument to purify the filter and decompress the air supply to the rated supply of the instrument. The pressure is equivalent to the function of the power transformer in the circuit.

Pneumatic valve accessories type:

Double acting pneumatic actuator: Two-position control for opening and closing the valve. (double acting)
Spring-return actuator: The valve automatically opens or closes when the circuit air circuit is cut off or fails. (single acting)

Single solenoid valve: The valve is opened or closed when the power is supplied, and the valve is closed or opened when the power is off (explosion-proof type is available).
Double electronically controlled solenoid valve: the valve opens when one coil is energized, the valve closes when the other coil is energized, and has a memory function (explosion-proof type is available).

Limit switch echo: Signal for the switch position of the remote transmission valve (explosion-proof type).

Electrical positioner: The medium flow control of the valve (explosion-proof type) according to the current signal (standard 4-20mA).
Pneumatic positioner: adjust the medium flow control of the valve according to the pressure signal (0.02-0.1MPa).

Electrical converter: converts the current signal into a pneumatic signal for use with a pneumatic positioner (explosion-proof).
Air source treatment triplex: including air pressure reducing valve, filter, oil mister, lubrication of gas source, cleaning, moving parts.

Manual operation mechanism: Automatic control can be operated manually under abnormal conditions.

Pneumatic valve fittings selection:
Pneumatic valves are complex automated control instruments that consist of a variety of pneumatic components that require detailed selection by the user.
1. Pneumatic actuator: 1 double acting, 2 single acting, 3 model specifications, 4 action time.
2, solenoid valve: 1 single control solenoid valve, 2 dual control solenoid valve, 3 use voltage, 4 explosion-proof type.
3, signal feedback: 1 mechanical switch, 2 proximity switch, 8 output current signal, 4 use voltage, 5 explosion-proof type.
4, positioner: 1 electric positioner, 2 pneumatic positioner, 8 current signal, 4 air pressure signal, 5 electrical converter, 6 explosion-proof type.
5, gas source treatment triple piece: 1 filter pressure reducing valve, 2 oil mister.
6, manual operation mechanism.

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