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2019

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Pneumatic ball valve repair and maintenance matters: What should you pay attention to during use?

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With the rapid development of China's industry, pneumatic ball valves are used more and more widely in metallurgy, petrochemical and other fields. Their stability and reliability are becoming more and more important. Their working status directly affects the automatic control process. This article will explain the characteristics of pneumatic ball valves. Use and maintenance.

  With the rapid development of China's industry, pneumatic ball valves are used more and more widely in metallurgy, petrochemical and other fields. Their stability and reliability are becoming more and more important. Their working status directly affects the automatic control process. This article will explain the characteristics of pneumatic ball valves. Use and maintenance.

  When using pneumatic ball valves, you need to pay attention to the following points:

  1. Pneumatic ball valves are on-site instruments. The ambient temperature should be within the range of -25 - 60℃, and the relative humidity should be ≤95%. If the equipment is in the open air or in a high temperature environment, waterproofing and cooling measures should be taken. Stay away from the earthquake source or add anti-vibration measures where there is a earthquake source.

  2. Pneumatic ball valves should generally be installed vertically. They can be tilted in special circumstances. If the tilt angle is too large or the weight of the valve itself is too large, additional support and protection should be provided to the valve.

  3. Under normal circumstances, the distance between the pipeline with pneumatic valve and the ground or ground should not be too high. When the pipe height is greater than 2m, a platform should be set up as much as possible to facilitate handwheel operation and maintenance.

  4. Before installing the pneumatic ball valve, the pipeline should be cleaned to remove dirt and welding slag. After installation, in order to ensure that impurities do not remain in the valve body, the valves should be cleaned again, that is, all valves should be opened when entering the medium to avoid clogging by impurities. After use, the handwheel mechanism should be returned to its original neutral position.

  5. In order to enable the production process to continue in the event of failure or repair of the pneumatic ball valve, a bypass should be added to the regulating valve bypass line. At the same time, special attention should be paid to whether the position of the adjustment device meets the process requirements.

 

  The electrical part of the pneumatic ball valve should be carried out in accordance with the construction requirements of relevant electrical equipment. If so, explosion-proof products should be installed in accordance with the requirements of the "Code for Electrical Equipment and Devices in Explosive Hazardous Locations". Such as field copper clad SBH type or other six or eight core, outer diameter is 11.3 mm Φ rubber cable. During use and maintenance, it is strictly prohibited to open the cover or pry open the flameproof surface. At the same time, do not knock or scratch the explosion-proof surface during disassembly and assembly, and restore it to the original explosion-proof state after maintenance.

  7. Pay attention to lubrication after repairing the actuator of the reducer. Low-speed motors are generally not disassembled, cleaned and refueled. After assembly, you should also check whether the position of the valve and the opening indication of the valve are consistent.

  The so-called "be cautious", don't take it lightly just because the valve is a small matter. When using pneumatic valves, you should pay attention or pay more attention to some matters. Don't cause an irreversible situation due to a moment of negligence.

 

Keywords in this article: Pneumatic ball valve

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