1, freezing, vibration: pressure gauge installed outside the boiler, is influenced by the external conditions. If the outside temperature is too low, frozen, or from boiler and pressure gauge vibration inside, will be on the sensitivity and accuracy of the pressure gauge pointer impact. Preventive measures: one is to install heat insulation device; two is to install a buffer device, such as the three way cock is a shockproof device.
2, the effect of temperature: the pressure gauge pressure is the pressure that the spring bending deformation. If the medium temperature is higher, the function of the temperature will also cause the deformation of the pipe. And high temperature medium for a long time in the spring of the pipe, but also to produce permanent deformation of the bend. All this will have a negative impact on measurement. Prevention approach is between the pressure gauge and the boiler barrel, with different forms of water in pipe, to the accumulation of condensation water and can prevent steam directly into the pipe spring.
3, the overload effect: the pressure gauge pipe springs, a hairspring and elastic components, as often in the limit or close to the limit state. After long time work will lead to the weakening or loss of elastic, even permanent deformation. If the pressure gauge is often greater than or equal to the full scale dial 2/3 position, is detrimental to the long-term work pressure gauge. The way is to prevent, first choose the pressure gauge, to choose a reasonable range, the working pressure in the range of 1/2 is the best. Secondly, to strictly prevent boiler overpressure operation.
