The structure of electric control valve and key points for installation
Electric regulator power supply is used to drive electric actuators and then drive to throttling valve, it is an important execution units in industrial automation process control instrumentation. As in the field of industrial automation degree is higher and higher, is being more and more application in the field of all kinds of industrial production. Electric regulator has obvious advantages: electric single-seat regulating valve and energy saving, environmental protection, and installation more convenient. Industrial automation control system of electric control valve by receiving signal to drive the differential pressure regulating valve series door change between the cross-sectional area of the valve core and valve seat size control pipe medium flow, process parameters, such as temperature, pressure, automatic regulating function. Electric sleeve valve electric actuator for electronic integration structure, with servo amplifier, in order to ensure that the regulator can while driving to work properly, and make the system safe operation, a new valve before installation, should first check valve nameplate on whether mark is consistent with the design requirements. If it is on the original system of regulating valve for overhaul, except to check all the information, also respond to the stuffing box and the connection of the old valve sealing check etc. Regulating valve in use at the scene, many often caused by the quality, not because the regulator itself but the electric control valve installation that caused by improper use, such as: installation environment, installation position and direction due to reasons such as caused by improper or line is not clean. Article 1: electric regulator belongs to the field instruments for environmental temperature should be in - 25 ~ 60 ℃, relative humidity 95%. If it is installed in the open air or high temperature applications, waterproof, cooling measures should be taken. Where there is the source to stay away from source or increase the antivibration measures. Article 2: general electric regulating valve should be installed vertically, special circumstances can tilt, such as the Angle is very big, or too much weight on the valve when the valve itself should increase support protection. Article 3: the installation of electric control valve pipe generally do not too high above the ground or floor, height is greater than 2 m in pipe should try to set up the platform, facilitate the handwheel operation and easy maintenance. Article 4: the electric control valve before installation for pipeline cleaning, eliminate dirt and welding slag. After installation, to ensure that no residue in the body, should also again to the valve and clean, the access into the medium should make all open valve, in order to avoid impurity stuck. After using the handwheel institutions, should be restored to the original neutral position. Article 5: in order to make the electric regulator in the case of failure or repair can continue to make the production process, the regulator should add by-pass line.