Pneumatic control valve stem preventing six big secret

common pneumatic pneumatic valve products are pneumatic regulating pneumatic valve, pneumatic to clip hard seal butterfly valve, pneumatic hard seal flange butterfly valve, pneumatic flange multi-layer metal hard seal butterfly valve, pneumatic diaphragm reciprocating pneumatic valve, pneumatic valve CV series pneumatic products, including pneumatic regulating pneumatic valve is one of the more important. Such products in use to avoid congestion caused by the improper maintenance, introduce several preventive measures below:

) Cleaning method

pipeline welding slag, rust, pulp are under the throttle mouth, guiding parts, pneumatic valve cover balance hole blockage or stuck pneumatic valve core surface, surface strain and scratch etc. Encounter this situation, it is necessary to remove for cleaning, remove the slag content, such as the sealing surface damage should also grinding; At the same time open the bottom plug to flush out from under the balance hole fall into the slag content in pneumatic valve cover, and the pipeline to wash. Before put into operation, to adjust the pneumatic valve fully open, the medium flows into normal operation again after a period of time.

) External flushing method

for some easy to precipitate, medium containing solid particles using ordinary pneumatic valve adjustment, often at the throttle mouth jam, guide, can the pneumatic valve cover bottom plug in an external erosion gas and steam. When regulating pneumatic valve is blocked or jammed, open external pneumatic valve, gas or steam can be completed in fixed adjustment under the condition of pneumatic valve flushing work, make the normal operation of pneumatic valve.

) Installation of pipeline filter method

for small diameter regulating pneumatic valve, especially ultra-small flow control pneumatic valve, the throttling clearance, small, even a little residue will be blocked in the medium, the best line in front of the pneumatic valve installation of a strainer, to ensure that the media to go through. With the adjustment of the positioner used pneumatic valve, locator is not normal work, the pneumatic throttle mouth blockage is the most common fault.

) Method of increasing the throttle clearance

medium solid particles or washed off in pipe welding slag and rust due to pass the throttle mouth such as jam, jam, such as fault, can convert the throttle gap bigger throttle piece - Throttling area of a window, open the pneumatic valve core, sleeve, rather than the circumference of a circle because of the throttling area of concentration distribution, fault can easily be ruled out. If you are single, two-seater pneumatic valve can change the plunger type pneumatic valve core to 'V' shape of the mouth pneumatic valve core, or into a sleeve pneumatic valve etc.

) Dielectric flushing method

use medium their energy flushing, flushing and take things easy to precipitate, easy to jam, thus improve the combat the function of the pneumatic valve. Common methods include: (1) flow into closed type use; (2) in pneumatic valve; (3) puts throttling mouth wash the worst place, using this method to pay attention to improve the resistance to erosion ability of throttling parts.

) Direct to the Angle

the pass-through for S flow, flow complex, upper and lower chamber should dead zone, provides the medium of precipitation. Angle connection, flows through ℃ medium like elbow, washing performance is good, dead zone is small, easy to design into a streamline.