适用于测量无爆炸危险，不结晶，不凝固及对钢合金不起腐蚀作用的液体、蒸汽和气体等介质的压力。 The pressure gauge is suitable for measuring the pressure of liquid, steam and gas without explosion danger, non-crystallization, non-solidification and non-corrosive effect on steel alloys. The equipment used to measure the pressure of the medium, the pressure gauges measure the pressure through elastic sensitive elements such as spring tubes. With the popularity of industrial automation and the need for process control processes, pressure gauges are increasingly used in industrial production. The quality of a pressure gauge determines its performance and use results, so how to judge the quality of a pressure gauge? 1. Dials and dials of pressure gauges are the parts to be observed when judging the quality. The numbers on the dials of the pressure gauges should be clear, complete and easy to identify. The scales should be evenly distributed and the center angle should be 270 °. A reasonable distance should be maintained between the pressure gauge pointer and the plane of the index plate, generally about 1-3mm. 2. Elasticity sensitive elements, elasticity sensitive elements of pressure gauges, such as spring tubes, are the most important components in pressure gauges. It determines whether the measurement performance of the pressure gauge can meet the needs of use. The spring tube of the pressure gauge must have sufficient elasticity to meet the measurement requirements. If the elastic sensitive element is too small, it will affect the accuracy level of the pressure gauge. 3. There is generally a certain error in the displayed value and the measurement result of the pressure gauge. This is the situation of every pressure gauge, but the displayed value of the pressure gauge cannot exceed the allowable error. If the indication of the pressure gauge exceeds the allowable range, adjust the adjustment screw. If the pressure gauge cannot be adjusted, it can only be judged as unqualified. 4. The casing and pressure gauge's casing is solid and reliable. The sealed pressure gauge's casing should have no leakage. The pressure gauge's casing should be designed with safety holes, and the safety control should be dust-proofed to protect the internal components from being affected. Corrosion or pollution, especially for pressure gauges such as diaphragm pressure gauges used in corrosive or other complex environments, pay more attention to the quality of the housing.
是生产生活中用来实现压力测量的设备，压力表使用中最重视的就是压力表指示的精度。 Pressure gauge is a device used to realize pressure measurement in production and life. The most important thing in the use of pressure gauge is the accuracy indicated by the pressure gauge. The pressure gauge indicates whether the indication is accurate or not. In addition to some factors of the pressure gauge itself, external factors will also affect the indication result. 1. The pressure gauge is affected by vibration; the pressure gauge will also be inaccurate under the vibration environment. The severe vibration will directly cause the deformation of the elastic element of the pressure gauge, affecting the sensitivity, accuracy and pressure of the user. Reading of the indicated value of the pressure gauge. The anti-vibration measures of the pressure gauge are mainly to install a buffer device and a shock absorbing device. 2. The pressure gauge is affected by overload; the overload operation of the pressure gauge does not just mean that the indicated value of the pressure gauge reaches the maximum of the scale, in fact, when the position exceeds 2/3 of the full scale, the elastic element of the pressure gauge is already near Limit state. The pressure gauge works for a long time under an overloaded state, and its internal elastic elements such as spring tubes and diaphragms will weaken or even lose their elasticity because of a long-term or near-limit deformation state, and eventually undergo permanent deformation. 3. The pressure gauge is affected by temperature; the pressure gauge's measurement of pressure mainly depends on its elastic components such as spring tubes. In high or low temperature environments, the elastic components of the pressure gauge will occur under the action of temperature. Deformation, especially for long-term pressure gauges working in high-temperature media, the elastic components may be permanently deformed, which will cause errors in the display of the pressure gauge.
的使用中，必然要尽量减少温度对压力仪表指示值的影响，最直接和有效的方法是避免压力仪表在异常温度环境下工作，如果无法避免则应当对压力表做防高温或防寒处理，例如为压力表安装冷凝装置或保温装置等。 In the use of pressure gauges , it is necessary to minimize the effect of temperature on the indicated value of the pressure gauge. The most direct and effective method is to avoid the pressure gauge to work in abnormal temperature environment. If it cannot be avoided, the pressure gauge should be protected from high temperature or cold. For example, install condensing device or insulation device for pressure gauge.