Pressure gauges refer to instruments that use elastic elements as sensitive elements to measure the pressure of gases, steam, and liquids. They are widely used in almost all industrial processes and scientific research fields. The pressure value of gas, steam and liquid measured by the pressure gauge is called gauge pressure.
The size of gauge pressure is based on standard atmospheric pressure. Instruments that measure pressure values higher than standard atmospheric pressure are called positive pressure gauges or pressure gauges, and instruments that measure pressure values lower than standard atmospheric pressure are called negative pressure gauges or vacuum pressure gauges.
Instruments that can measure both positive and negative pressures are called pressure vacuum gauges. It can be seen everywhere in heat pipe network, oil and gas transmission, water and gas supply system and other fields.
There are many kinds of pressure gauges, which are classified according to the purpose: it not only has conventional series, but also digital series; not only has ordinary medium application series, but also special medium application series; not only switch signal series, but also remote signal series, etc.,
such as General-purpose pressure gauges include: oxygen pressure gauge, ammonia pressure gauge, hydrogen pressure gauge, electric contact pressure gauge and remote pressure gauge, etc., and special-purpose pressure gauges include: diaphragm pressure gauge, anti-corrosion pressure gauge and shock-resistant pressure gauge, etc. .
According to the classification of elastic components: there are "C" spring tube pressure gauges (single coil spring tubes), spiral spring tube pressure gauges (multi-coil spring tubes), and a complete series of pressure gauges. They are all derived from practical needs and constitute a complete series successively.
The specifications and models of the pressure gauge are complete, and the structure is perfect.
From the nominal diameter, there are Φ40mm, Φ50mm, Φ60mm, Φ75mm, Φ100mm, Φ150mm, Φ200mm, Φ250mm, etc. From the perspective of the installation structure, the radial pressure gauge has the radial direct installation type, the radial belt diameter side is also called the convex (wall mounted) type, and the axial pressure gauge has the axial eccentric type, the axial concentric direct installation type, and the embedded type.
Mounted (panel mounted) and axial concentric convex mounted (wall mounted). Among them, the radial direct installation type is the basic installation type. Generally, when the installation structure type is not specified, it refers to the radial direct installation type. Common precision grades are 4, 2.5, 1.6, 1, 0.4, 0.25, 0.16, 0.1, etc. The accuracy grade should generally be marked on its dial, and its mark is also regulated accordingly.
The general pressure gauge is used for the following points:
- Monitor the working condition of the medium filled in the pressure vessel in order to properly control the pressure capacity and protect the safety of production equipment;
- Understand the state of material changes during the production process, so that certain process parameters are controlled under given conditions to ensure that the quality of the product meets the requirements;
- Provide reliable data for operators to monitor, control and adjust production by mastering pressure parameters.
Privacy settings