Spring tube pressure gauge and installation points

At present, the most widely used on-site pressure gauge in production is the mechanical pressure gauge. Mechanical pressure gauges are mainly divided into spring tube (Bourdon tube) pressure gauges, diaphragm pressure gauges, bellows pressure gauges, and bellows pressure gauges according to their different elastic sensitive components. This article mainly takes the spring tube pressure gauge as an example. Spring tube pressure gauges come in various varieties and specifications, with the characteristics of simple structure, convenient use, high accuracy, durability, and low price. Therefore, they are widely used in various pressure measurement occasions in industrial production. Spring tube pressure gauge, also known as Bourdon tube pressure gauge, is divided into C-tube, reed tube, spiral tube and other types.

The elastic deformation of the spring tube under the pressure of the internal medium is utilized to convert the pressure into elastic displacement at the free end of the spring tube, which is then amplified by the gear transmission mechanism of the pressure gauge. The pressure gauge will display the relative value (high or low) relative to atmospheric pressure. The pressure value within the measurement range is displayed by the pointer, and the measurement range of the spring tube is generally between 0.1MPa and 250MPa. For the installation of pressure gauges, the following precautions should be taken: 1. The installation position of the pressure source component should be selected in a place where the medium flow rate is stable. 2. When measuring the pressure of turbid media such as dust, solid particles, or sediment, the source component should be installed tilted upwards. 3. When installing pressure source components on horizontal and inclined process pipelines, the orientation of the pressure tap should comply with the following regulations: (1) When measuring gas pressure, it should be located in the upper half of the process pipeline. (2) When measuring liquid pressure, within the range of 0-45 degrees between the lower half of the process pipeline and the horizontal centerline of the process pipeline. (3) When measuring steam pressure, within the range of 0-45 degrees between the upper and lower halves of the process pipeline and the horizontal centerline of the process pipeline.