The new control system design and installation, in order to ensure that the valves in driving to work, and make the system safe operation, before installing the new valve should first check whether the valve on the nameplate labeled with the design requirements. At the same time also to deal with the following items for debugging.
Basic error limit; total travel deviation; return difference; dead zone; leakage (in the strict requirements of occasions).
If the original system is to overhaul the valve, in addition to the above for calibration, but also to deal with the old valve stuffing box and connection and other parts of the seal.
In field use, many are not because of quality control valve itself is caused by, but the valve caused by improper installation, such as the installation environment, or improper installation location and direction of pipe is dirty due to other reasons. Therefore, the installation and use of electric control valve should pay attention to the following aspects:
The regulating valve belongs to field instruments, requirements of environmental temperature should be at - 25 to 60 DEG C, relative humidity is less than 95%. If it is installed in the open air or high temperature, should be taken to water, cooling measures. In a place away from the local oscillator source or increase the anti vibration measures.
The valve should be installed vertically, can be tilted under special circumstances, such as the tilt angle is large or the valve itself is too large weight bearing parts of the valve should be increased protection.
The installation of the pipeline control valve is generally not too high off the ground or floor, the pipe height is greater than 2m should be possible to set a platform to facilitate the operation of wheel and easy maintenance.
The valve piping should be cleaned before installation, remove dirt and welding slag. After installation, in order to ensure that impurities remain in the body, but also should be cleaned again, that is, through the media should make all the valve open, so as to avoid impurities stuck. After using the hand wheel, should be restored to its original neutral position.
In order to make the valve in the event of failure or maintenance of the case so that the production process can continue, bypass valve should be added to the pipeline.
At the same time also should pay special attention to the installation location of the regulator valve is in line with the requirements of the process.
No electrical part of the electric control valve should be installed according to the construction requirements for electrical equipment. If it is an explosion - proof products should be according to the "explosion hazardous areas of electrical equipment installation specification" requirements for installation. If the wire by SBH or other six or eight core, diameter of about 11.3mm?? rubber cable installation. In the use of maintenance, in the explosive site is strictly prohibited through the open cover maintenance and to pry open the surface to play. At the same time and do not knock or scratch injury flameproof surface, after overhaul to restore the original state of explosion-proof requirements.
Is the executive body of the reducer overhaul should be noted that after lubrication, low-speed motor is generally not washable. Assembly should also check the valve position and valve position indication is consistent.
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