Regulator of daily maintenance

Regulating valve repair work includes the following content.

1. Eliminate stress. All kinds of stress due to improper installation or combination. High temperature medium produce thermal stress, for instance, when installation tight. Solid force imbalance caused by stress, etc. Imbalance effect of stress on regulating valve, make the valve stem, lead to deformation, can''t correct and seat to cause leakage, poor increase, etc. Therefore, in the daily maintenance repair work should be performed to eliminate stress.

2. Remove the rust and dirt. Check valve connecting pipe presence of rust, welding slag, dirt, etc., should keep clear of in time. Because these dirt will cause regulator valve core and valve seat wear and tear, affect the normal operation of the valve. Usually, can be equipped with filter screen in front of the control valve filter unit, and regular cleaning.

3. Check the regulator. Regulator support make the regulator parts are not affected by gravity and position. If improper support from the valve stem and valve seat can''t, make variation increases, sealing performance degradation. Therefore, we should check valve support.

4. Remove air, hydraulic oil, such as the supply of energy waste. Air and hydraulic source is energy source of regulating valve operation. Instrument with compressed air, hydraulic oil contains impurities may clog orifice and pipe, cause of failure. Therefore, regularly check the gas source, hydraulic oil, regular to sewage filtering device is very important.

5. Gear check. Rival wheel mechanism, electric actuator and the hydraulic actuator gear should be checked regularly, add lubricant, prevent the bite card phenomenon. Check the brake and limit device is flexible to use.

6. Check the stuffing box. Should check the wear condition of packing and compaction force, regular replacement of stuffing box, the packing can be in a sealed at the same time, reduce the friction of shadow to the mouth. The oil free stuffing box should not add lubricating oil.

7. The safe operation of the check. For use in explosive dangerous places the regulator and the related attachment shall check its safety operation, for example, sealing cover are tight, the operation situation of safety barrier, power supply, etc., ensure to safe operation of the regulator and related accessories.

8. Transportation and storage. Regulating valve during transportation and storage, application of special bracket, prevent loose; Installed on the control valve of the related accessories, such as the valve positioner, the handwheel agencies should be solid, feedback should prevent and control valve connection rod and other components by external injury; The connection interface application plastic sleeve to prevent external things invasion; Regulating valve connectors available supporting flange and blind flange seal, seal, also can use sticky paper to prevent outside intrusion. Transportation should be equipped with strong wooden, and take the bad transportation environment, such as wind, rain and dust. Transportation and storage conditions should meet the product specifications.