Control valve extras are different, some of them are vital for the exhibition of the entire machine. Positioners are principal frill. Pneumatically worked valves rely upon a positioner to take an information signal from an interaction regulator and convert it to valve travel. Solenoid valve complex is likewise a significant sort of control valve adornment. The actuator type and the ideal safeguard activity decide the determination of the appropriate solenoid valve. The solenoids can be utilized on twofold acting cylinders or single-acting stomach actuators.
Limit switches additionally have cozy relationship with control valves. Limit switches work discrete contributions to a conveyed control framework, signal lights, little solenoid valves, electric transfers, or cautions. The cam-worked type is ordinarily utilized with two to four individual switches worked by development of the valve stem. A get together that mounts on the actuator houses the switches. Each switch changes independently and can be provided for either rotating current or direct current frameworks. Different styles of valve-mounted limit switches are additionally accessible.
Supply pressure controllers generally called airsets, which can lessen plant air supply to valve positioners and other control hardware. Normal diminished air-supply pressures are 20, 35 and 60 psig. The controller mounts essentially to the positioner or areola mounts or rushes to the actuator.
Pneumatic lock-up frameworks van điều khiển điện are utilized with control valves to secure in existing actuator stacking strain in case of supply pressure disappointment. These gadgets can be utilized with volume tanks to supply move the valve to the completely open or shut position on loss of pneumatic air. Typical activity continues naturally with reestablished supply pressure. Practically comparable plans are accessible for control valves utilizing stomach actuators.
Electro-pneumatic transducer gets an immediate flow input sign and uses a force engine, spout flapper, and pneumatic transfer to change the electric sign over completely to a relative pneumatic result signal. Spout pressure works the transfer and is funneled to the force engine criticism roars to give an examination between input sign and spout pressure. As displayed, the transducer can be mounted straightforwardly on a control valve and work the valve without need for extra supporters or positioners. Also, the electro-pneumatic positioners are utilized in electronic control circles to work pneumatic stomach control valve actuators.