Some common fault analysis pressure gauge

In our daily inspection gauge, often meet with faulty pressure gauge, when faced with pressure gauge failure in need of repair, pressure gauge shall be mounted on pressure gauge validator to check, find out the fault parts, determine the cause, before we decide to repair methods and components. Pressure gauge is the use of different kinds of deformation of the elastic element under the action of pressure to measure pressure or vacuum. The deformation through the drive mechanism, and finally by the pointer driving instructions. This pressure gauge is simple in structure, cold resistant, heat resistant, easy to use, wide measuring range, the characteristic of high accuracy, is widely used in production and living. Pressure gauge common faults are: ( 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 to the central axis and loose or pointer is stuck. ( 2) Pointer jitter, the causes of pointer jitter are: hair damage; Cock or trap pipe local blocked; 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 to the central axis 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; The gear wear loose; Hair disorder; Plug the leak and reasons for this.