Adjust the pneumatic valve maintenance specification

on a regular basis to preventive maintenance and regulating pneumatic valves, pneumatic valves not only can improve work efficiency, and can reduce the pneumatic valve wear and tear, reduce the maintenance cost and therefore is very important for the maintenance and maintenance, the following is a regulating pneumatic valve maintenance specification, for your reference.
a pneumatic valve, adjustment daily inspection and maintenance work include the following contents:
and eliminating stress. All kinds of stress due to improper installation or combination. For example, high temperature medium produce thermal stress, installation time is tight. Solid power imbalance caused by stress and so on. Imbalance effect of stress on regulating pneumatic valve, pneumatic valve to adjust the pneumatic valve stem, leads to a distortion, not correct to cause leakage with the pneumatic valve seat, increases variation, etc. Therefore, in the daily maintenance repair work should be performed to eliminate stress.
, remove rust and dirt. Regularly check whether there is any rust on regulating pneumatic valve connection pipe, welding slag, dirt, etc. , should keep clear of in time. Because these dirt will adjust the pneumatic valve pneumatic valve core and pneumatic valve seat wear and tear, affect the normal operation of the pneumatic valve adjustment. Usually, can be equipped with filter screen in front of the regulating pneumatic valve filter unit, and regular cleaning.
, check the pneumatic valve to support the adjustment. Adjust the regulating pneumatic valve pneumatic valve support with the components in the position of the is not affected by gravity, etc. If support can cause improper regulation pneumatic pneumatic valve stem and valve seat can't, make variation increases, sealing performance degradation. Therefore, we should check the regulating pneumatic valve support.
, clear air, hydraulic oil, such as the supply of energy waste. Air and hydraulic source is adjust the energy source of pneumatic 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.
and 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.
, 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.
, the safe operation of the inspection. In the adjustment of the explosive dangerous sites use pneumatic valve and the related attachment shall check its safety operation, for example, sealing cover are tight, the operation situation of safety barrier, power supply, such as regulating pneumatic valve and related accessories to ensure safe operation.
, transportation and storage. Adjust the pneumatic valve during transportation and storage, application of special bracket, prevent loose; Installed on regulating pneumatic valve related accessories, such as pneumatic valve positioner, the handwheel agencies should be strong, should prevent and adjust the feedback rod part of the pneumatic valve connected by external injury; The connection interface application plastic sleeve to prevent external things invasion; Regulating pneumatic valve connectors available mating 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.
2, adjust the pneumatic valve and accessories the main content of the daily maintenance is as follows:
, actuator diaphragm replacement. Pneumatic diaphragm actuator diaphragm in the process of running by scale, therefore, the fatigue damage. When replacement should use the same specification of rubber diaphragm, binding should make diaphragm stress even when, prevent leakage and crush the diaphragm.
and grinding. Pneumatic valve core and pneumatic seat cause leakage, in operation after a certain period of time between the cylinder can cause internal leakage between piston and cylinder, then should be grinding. Can be carried out manually grinding, mechanical grinding, coating process and set the set of methods, such as grinding with emery particle size should be appropriate, grinding force should be uniform and appropriate. Should be done after grinding, polishing, and meet the required finish and accuracy requirement, and satisfaction of the pneumatic valve core and the pneumatic valve seat to the requirement, etc. , need a tightness test after assembly.
and packing replacement. 。 Packing replacement should use the same type of stuffing box, tick the replacement should be careful when the packing, right demolition of packing, to prevent the pneumatic valve stem damage. Installation of new packing shall be in accordance with the specifications, incision should be misplaced, prevent pneumatic valve stem thread on the scratch of packing, packing pressure force should be uniform and appropriate, prevent cause stress and increase the friction.
and transmission parts replacement. Adjust the driving part if part of the pneumatic valve and accessories worn parts can be replace, repair, etc. After replacement and repair should guarantee the flexible transmission, transmission clearance small as far as possible.
cleaning, pneumatic amplifier. Caused by instrument use compressed air in the dirt of pneumatic amplifier orifice jams to throttle hole cleaning, suitable wire used for dredging and cleaning. Back pack, amplifier diaphragm should be uniform stress, prevent blockage or leakage. Can be adjusted by adjusting the clamping force of steel ball amplifier gain and avoid resonance.