The use of electric pneumatic control valve carefully

Electric pneumatic control valve is an important execution units in industrial automation process control instrumentation. Well versed in valve which is a kind of new materials, as in the field of industrial automation more and more high, is being more and more application in the field of all kinds of industrial production. Compared with traditional pneumatic pneumatic - valve has obvious advantages: energy saving (electric pneumatic regulator Only electricity when at work) , environmental protection, No carbon emissions) Fast installation, convenient, No need for complicated pneumatic pipe and pump stations) 。 Valve by their ticket enforcement agencies use the power, according to its functions and features are divided into linear features, such as percentage and parabolic characteristics three installation note: new design, installation of control system, in order to ensure that the pneumatic - valve when driving to work, and make the system safe operation, a new valve before installation, should mark on the first check valve nameplate is consistent with the design requirements. At the same time also respond to the following project debug. The basic error limits; All the schedule deviation; Back to the poor; Dead zone; Leakage ( In demanding situations) 。 If it is on the original system of pneumatic control valve repair, except to check all the information, also respond to the stuffing box and the connection of the old valve sealing check etc. In use at the scene, many are often not because of quality caused by the pneumatic - valve itself, but rather that caused by improper use of pneumatic control valve installation, such as installation environment, installation position and direction due to reasons such as caused by improper or line is not clean. So electric pneumatic - valve during installation should pay attention to the following aspects: 1, pneumatic control valve belongs to the field instruments, require the environment temperature should be in 25 ~ 60 ℃, relative humidity & le; 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. 2, pneumatic control valve should be installed vertically, commonly 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. 3, pneumatic control valve installation of 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. 4, pneumatic 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. 5, in order to make the pneumatic control valve in the event of a fault or repair can continue to make the production process, under the condition of pneumatic control valve should add by-pass line. At the same time also should pay special attention to, the installation of the pneumatic control valve position whether accord with the requirement of technological process. Part 6, electric pneumatic - valve electrical installation shall be in accordance with the relevant requirements for electrical equipment construction. So flameproof products should be according to the explosive dangerous location electrical equipment installation specification requirements for installation. Such as the scene copper-clad SBH type or other six or eight core, outer diameter of 11. About 3 mm rubber cable installation. In the use of maintenance, in the explosive place the flame-proof surface electricity open repair and shall be strictly forbidden to pry. At the same time in dismantling the harm upon or scratch flame-proof surface, after repair to be reverted to the original state of flame-proof requirement. 7, actuator reducer lubrication, should be paid attention to after repairing and low speed motor generally don't cheer unpick and wash. After assembly also should check whether the valve position and the opening of the valve position indicator.