Burner control valve plays an important role in the regulation of the burner, fuel flow, pressure, temperature and other parameters can not be regulated without the participation of the control valve, so the need for regular inspection of the burner control valve.
1.Stress relief.
Various stresses due to improper installation or combination. For example, high temperature media produce thermal stress and tight installation. Unbalance of solid force causes stress and so on. The imbalance of stress on the control valve, so that the control valve stem, guide parts deformation, can not be correct and the seat in the middle of the leakage, increase in variation. Therefore, stress relief should be carried out in daily maintenance.
2.Remove rust and dirt.
Check regularly whether there is rust, welding slag, dirt and so on in the connecting pipe of the regulating valve, and remove it in time when found. Because these dirt will cause the valve core and seat wear, affect the normal operation of the valve. Usually, can be installed in front of the regulator filter screen and other filtering devices, and regular cleaning.
3.Check the support of regulating valve.
The support of the regulating valve enables the parts of the regulating valve to be in a position free from the influence of gravity, etc. Improper support will cause the valve stem and seat can not be aligned, so that the difference increased, sealing performance decreased. Therefore, check whether the regulator support is appropriate.
4.Clean up the air source, hydraulic oil and other energy supply dirt.
Air source and hydraulic source are the energy source of regulating valve operation. Impurities contained in the compressed air and hydraulic fluid used in the instrument can clog the throttling holes and pipes, causing faults. Therefore, it is very important to check the air source and hydraulic oil regularly and carry out sewage treatment regularly to the filter unit.
5.Inspection of gear transmission.
The gear transmission of the hand wheel mechanism, electric actuators and hydraulic actuators should be checked regularly and lubricants should be added to prevent the occurrence of biting and jamming. Check that brake and limit devices are in good working order.
6.Stuffing box inspection.
The packing shall be inspected for wear and compression force, and the stuffing box shall be replaced regularly to ensure that the packing can seal while reducing the friction of the hole. Do not add lubricating oil to the grease-free stuffing box.
7.Check the safe operation.
The safe operation of the regulator and related accessories used in explosive dangerous places should be checked, for example, whether the sealing cap is tightened, the operation of the safety grid, the supply of power, etc., to ensure the safe operation of the regulator and related accessories.
8.Transportation and storage.
During transportation and storage, the regulating valve shall be fixed with special support to prevent looseness; The relevant accessories installed on the control valve, such as valve positioner, handwheel mechanism, etc., should be firm, should prevent the feedback rod connected with the control valve and other components from being damaged by external forces; Each connection interface shall be sealed with plastic film to prevent the invasion of external objects; The connecting mouth of the regulating valve can be sealed with matching flange and blind plate, or can be sealed with adhesive paper to prevent invasion of external materials. During transportation, solid wooden boxes should be installed and be protected against wind, sand, rain, dust and other adverse transportation environmental conditions. The environmental conditions for transportation and storage shall meet the requirements of the product specification.
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