Pressure gauge manufacturers tell you how pressure gauges are classified.

There are many kinds of pressure gauges, including general (ordinary) pointer indicating type and digital type; There are not only conventional types, but also special types; Not only contact type, but also remote transmission type; Not only has vibration resistance, but also earthquake resistance; Not only diaphragm type, but also corrosion-resistant type. Pressure gauge series is complete. It has not only regular series, but also digital series; There are not only ordinary media application series, but also special media application series; There are not only switching signal series, but also remote transmission signal series, etc. They all come from practical needs and have formed a complete series. The specifications and models of pressure gauges are complete, and the structural type is perfect. From the nominal diameter, there are φ Φ40mm, φ 50mm, φ Φ60mm, φ Φ75mm, φ Φ100mm, φ Φ150mm, φ Φ200mm, φ Φ250mm, etc. 　　

From the installation structure type, there are direct installation type, embedded type and convex type, in which embedded type is divided into radial embedded type and axial embedded type, and convex type is also divided into radial convex type and axial convex type. Direct installation is divided into radial direct installation and axial direct installation. Among them, the radial direct installation type is the basic installation type, and generally it refers to the radial direct installation type when the installation structure type is not specified. Considering the stability of its own support, the axial direct installation type is generally only selected on pressure gauges with nominal diameter less than 150 mm. The so-called embedded and convex pressure gauges are the pressure gauges with edges (mounting rings) that we often say. Axial embedded pressure gauge with axial front band, radial embedded pressure gauge with radial front band and radial convex pressure gauge (also called wall mounted pressure gauge) with radial rear band. 　　

pressure gage

From the range and range section, the positive pressure range is divided into micro-pressure range section, low-pressure range section, medium-pressure range section, high-pressure range section and ultra-high-pressure range section, and each range section is subdivided into several measuring ranges (instrument range); There are three kinds of negative pressure (vacuum gauge) in the negative pressure range (vacuum); The pressure gauge with positive pressure and negative pressure is a cross-range pressure gauge. Its specification name is pressure vacuum gauge, and it is also called vacuum pressure gauge and stainless steel shock-resistant gauge. It can measure not only positive pressure but also negative pressure. 　　

The accuracy classification of pressure gauges is very clear. Common accuracy levels are 4, 2.5, 1.6, 1, 0.4, 0.25, 0.16 and 0.1. Generally, the accuracy grade should be marked on its dial, and its marking is also stipulated accordingly. For example, "①" indicates that its accuracy grade is Grade 1. For some pressure gauges with very low accuracy level, such as level 4, and others that only need to indicate the pressure range without measuring the accurate pressure value, such as the diaphragm pressure gauge on the fire extinguisher, the accuracy level may not be marked. 　　

Diaphragm pressure gauge manufacturers introduce the working principle of diaphragm pressure gauge to you.

The pressure guide system and shell of stainless steel corrosion-resistant diaphragm pressure gauge are all stainless steel, which has strong corrosion resistance. It is mainly used to measure the tiny pressure of gas and liquid in chemical, petroleum and textile industries, especially in corrosive and viscous media (non-solidified and non-crystallized).

The vibration-resistant diaphragm pressure gauge is filled with damping liquid and supporting buffer device, which has good vibration-resistant performance. The vibration-resistant diaphragm pressure gauge can be used to measure stably when the pressure of the measured medium has a strong pulse change or pressure shock and is often suddenly unloaded in the production process, as well as in places with large environmental vibration. The corrosion-resistant and shock-resistant diaphragm pressure gauge has the characteristics of both corrosion-resistant and shock-resistant diaphragm pressure gauges.

diaphragm manometer

Structure principle of diaphragm pressure gauge;

The instrument consists of measuring system (including flange joint and corrugated diaphragm), transmission indicating mechanism (including connecting rod, gear transmission mechanism, pointer and dial) and shell (including watch case and cover ring). The instrument shell is a splash-proof structure with good tightness, so it can protect its internal mechanism from contamination.

The function principle of the instrument is based on the deformation of the elastic element (diaphragm on the measuring system). Under the pressure of the measured medium, the diaphragm is forced to produce corresponding elastic deformation-displacement, which is amplified by the transmission mechanism of the connecting rod group, and the measured value is indicated on the dial by the pointer fixed on the gear.

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