What should be paid attention to when installing and using the regulating valve?

In the field use of regulating valves, many of them are not caused by the quality of the regulating valve itself, but caused by improper installation and use of the regulating valve, such as the installation environment, improper installation position and direction, or unclean pipelines. Therefore, the following aspects should be paid attention to when installing and using the electric control valve:

(1) The regulating valve is a field instrument, and the ambient temperature should be in the range of -25～60℃, and the relative humidity should be ≤95%. If it is installed in the open air or in a high-temperature place, waterproof and cooling measures should be taken. Keep away from the vibration source or increase anti-vibration measures where there is a seismic source.

(2) The regulating valve should generally be installed vertically, and can be tilted under special circumstances. For example, when the tilt angle is large or the valve itself is too heavy, the valve should be protected by supporting parts.

(3) Generally, the pipeline for installing the regulating valve should not be too high from the ground or the floor. When the pipeline height is greater than 2 m, the platform should be set as far as possible to facilitate the operation of the hand wheel and facilitate the maintenance.

(4) The pipeline should be cleaned before installation of the regulating valve to remove dirt and welding slag. After installation, in order to ensure that no impurities remain in the valve body, the valve should be cleaned again, that is, all valves should be opened when the medium is introduced to prevent the impurities from getting stuck. After using the handwheel mechanism, it should be restored to the original neutral position.

(5) In order to enable the regulating valve to continue the production process in the event of failure or maintenance, the regulating valve should be equipped with a bypass pipeline.

(6) The installation of the electrical part of the electric control valve should be carried out in accordance with the construction requirements of the relevant electrical equipment. If it is an explosion-proof product, it should be installed in accordance with the "Specifications for Installation of Electrical Equipment in Hazardous Locations". For example, the field wire adopts SBH type or other six-core or eight-core rubber installation cable with an outer diameter of about Φ11.3 mm. During use and maintenance, it is strictly forbidden to open the cover for maintenance and pry on the explosion-proof surface in explosive places. At the same time, do not knock or scratch the explosion-proof surface during disassembly and assembly, and restore to the original explosion-proof requirement state after maintenance.

(7) Pay attention to lubrication after disassembly and repair of the reducer of the actuator. Generally, do not disassemble, wash and refuel the low-speed motor. After assembly, check whether the valve position is consistent with the valve position opening indication.
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