Pneumatic control valve accessories role < / div >

pneumatic valve adjustment in the process of production, the control system to put forward the special requirements of various pneumatic valve, in order to improve the performance of regulating pneumatic valve and enlarge the using range of regulating pneumatic valve, thus regulating pneumatic valve must with all kinds of accessory device ( Referred to as the attachment) To meet the needs of the production process, also can choose the suitable adjustment according to different working condition of pneumatic valve accessories, here small make up to introduce different to adjust the action of pneumatic valve accessories to choose from.
pneumatic regulating pneumatic valve commonly used several kinds of accessories are: pneumatic valve positioner, electromagnetic, limit switch, air filtration pressure pneumatic valve
the locator: pneumatic valve positioner is to adjust the main accessories, pneumatic valve with pneumatic control pneumatic valve, regulator output signal, and then to the output signal to control the pneumatic pneumatic valve adjustment. When regulating pneumatic valve action, pneumatic valve rod displacement and feedback through mechanical device to the pneumatic valve positioner; Pneumatic valve positioner can increase to adjust the output power of the pneumatic valve, reduce the number of control signal transmission lag, accelerate the pneumatic valve rod movement speed, to improve the linearity of the pneumatic valve, overcome the friction of the pneumatic valve stem and eliminate the influence of unbalanced force, so as to ensure the correct positioning of regulating pneumatic valve.

a, regulating pneumatic valve using the following conditions must be put in the locator to control

increase the output power of the actuator. Origin of
when a failure occurs, adjust the pneumatic valve movement direction does not conform to, control system security requirements.
require a change to adjust flow rate characteristics of pneumatic valve
adjusting instruments for electrical signal

actuator with double acting pneumatic valve control right
stuffing box of high friction
fluid or mud particle in the fluid viscosity
actuator sliding friction major
adjustment between instrument and regulating pneumatic valve gas input signal line is longer than the
solenoid pneumatic valve: in addition to consider when choosing a solenoid pneumatic valve/( Straight) Power flow and voltage, frequency, potting coil and other requirements, must pay full attention to the electromagnetic pneumatic valve and regulating pneumatic valve type, the relationship between adjusting pneumatic valve can with normally open or normally closed type solenoid pneumatic valve.
limit switch: ( Also known as: stroke switch) If a termination point shows pneumatic valve core position, limit switch can be installed in the pneumatic valve in full open position or in a seated position, if shows two terminal location, two limit switches shall be installed in the position of full open and close.
air filtration pressure pneumatic valve: it is the most typical in regulating pneumatic valve accessories accessories, it is used to purify air supply from the air compressor, and can adjust the pressure to the desired pressure value, has the function of automatic voltage regulator.