Pressure gauge common failures and repair skills

Use common faults are: (pressure gauge 1) Pointer, when pressure, pressure gauge pointer. The reason may be that: the cock not open; Cock, pressure gauge tube or trap tube jam; Pointer spindle and loose or pointer is stuck. （ 2) Pointer jitter, the causes of pointer jitter are: hair damage: cock or partial blockage of trap tube channel; Bending on both ends of the central axis, axis rotation on both ends. （ 3) Pointer back to less than zero, in the absence of pressure of the cause of the phenomenon is: spring bend produce permanent deformation lose elasticity; Pointer towel spindle and loose, or pointer stuck; Cock, pressure gauge channel plugging pipe or trap. （ 4) Instructions is not correct, exceed the permitted error, this is mainly due to the excessive deformation due to high temperature or overload spring tube: loose gear wear and tear; Hair disorder; Plug the leak and reasons for this. Pressure gauge, have one of following cases should stop using: ( 1) Limited check pin gauge, in the absence of pressure after the hands and not to limit with nails; Infinite check pin gauge, in the absence of pressure, the pointer from the zero value exceed the permissible error of pressure gauge; （ 2) The dial and glass broken or dial scale fuzzy; （ 3) Seal damage or exceed the calibration validity; （ 4) Spring in the table loose tube leakage or pressure gauge pointer; （ 5) Other defects affecting the pressure gauge accurate instructions. After pressure is removed, Pointers can't return to zero. 1) Pointer to bending or loose, tweezers correction are available, and after check out. 2) Balance spring torque is insufficient, can release center gear and sector gear meshing, counter clockwise swirl center gear shaft to increase one beholds the moment. 3) Transmission gear with friction. Adjust the gear meshing clearance. Pressure gauge pointer have beats or dull small turning phenomenon. 1) A pointer into the surface of glass or dial with friction. Can rectify pointer, thickening glass washer or pointer shaft hole below ground. 2) L center gear shaft bending, trunnion different heart, don't match, desirable bligh gear correction with wooden hammer knock, or with a cutting pliers straightening; 3) There is dirt, between the two gear mesh can remove the two gears to clean. 4) Between the connecting rod and sector gear screw loose screws not activities or activities, available file file thin thickness of the connecting rod.