How to control various factors of pipeline medium with electric control valves
Release time：
2021-11-12 11:03
Electric regulating valves are important execution unit instruments in industrial automation process control, which use power to drive electric actuators and then drive valves for throttling. With the increasing level of automation in the industrial field, it is being increasingly applied in various industrial production fields. Compared with the traditional pressure regulating valve series, electric regulating valves have obvious advantages: electric single seat regulating valves are energy-saving, environmentally friendly, and installed more quickly and conveniently.
The electric regulating valve drives the differential pressure regulating valve series door by receiving signals from the industrial automation control system to change the cross-sectional area between the valve core and valve seat, control the flow rate, temperature, pressure and other process parameters of the pipeline medium, and achieve automated regulation functions.
The electric actuator of the electric sleeve regulating valve is an electronic integrated structure, with a servo amplifier inside. The control signal and power supply of the field and pneumatic grinding regulating valve series can be input to control the valve opening, achieving the adjustment of pressure, flow, liquid level, temperature and other working parameters. Attention: In order to ensure the normal operation of the regulating valve during driving and ensure the safe operation of the system, before installing a new valve, it is necessary to first check whether the nameplate markings on the valve comply with the design requirements.
Article 3: If the control valve in the original system is overhauled, in addition to the calibration of the above items, the sealing inspection shall also be carried out on the stuffing box and connection of the old valve.
Article 4: In on-site use, many regulating valves are not caused by the quality of the regulating valve itself, but by improper installation and use of electric regulating valves, such as improper installation environment, installation position and direction, or unclean pipelines.
Article 1: The regulating valve belongs to on-site instruments and requires an ambient temperature range of -25~60 ℃ and a relative humidity of 95%. If installed in outdoor or high-temperature environments, waterproof and cooling measures should be taken. Stay away from the vibration source or increase anti vibration measures in areas with seismic sources.
Article 2: Electric control valves should generally be installed vertically, and can be tilted in special circumstances. If the tilt angle is large or the valve itself has too much self weight, support components should be added to protect the valve.
Article 3: The pipeline for installing the regulating valve should generally not be too high from the ground or floor. When the pipeline height is greater than 2 meters, a platform should be set up as much as possible to facilitate the operation of the handwheel and maintenance.
Article 4: Before installing the electric control valve, the pipeline should be cleaned to remove dirt and welding slag. After installation, to ensure that no impurities remain in the valve body, the valve should also be cleaned again, that is, all valves should be opened when the medium is introduced to prevent impurities from getting stuck. After using the handwheel mechanism, it should be restored to its original neutral position.
Article 5: In order to continue the production process in the event of malfunction or maintenance of the electric control valve, a bypass pipeline should be added to the control valve.
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