What is a diaphragm pressure gauge? Structural Principle Analysis
Diaphragm pressure gauge is also called micro pressure gauge. It is suitable for measuring low micro pressure of liquids, gases or vapors without explosion hazard, without crystallization, without solidification, and without corrosive effect on copper and copper alloys.
The bellows pressure gauge uses the bellows as a sensitive element for measuring small pressures. It is widely used in boiler ventilation, gas pipeline, combustion equipment and other similar equipment to measure the corrosion effect on copper alloy, the micro pressure and sound pressure of non-explosive dangerous gas.
The stainless steel diaphragm pressure gauge is made of stainless steel according to the induction pressure system and the casing. In the process of corrosion resistance, it is used to measure the micro pressure and sound pressure of various gases.
The stainless steel diaphragm pressure gauge is a micro pressure gauge with anti-corrosion developed by referring to the structural characteristics of the original diaphragm pressure gauge. It is used in equipment such as boiler ventilation and gas pipelines to measure the micro-pressure and sound pressure of various gaseous media in the process of high anti-corrosion requirements. Accuracy class 33602.5.
Structural principle
The instrument consists of measuring system, transmission mechanism, parts and casing.
The working principle of the instrument is based on the corresponding elastic deformation of the free end of the corrugated bellows under the pressure of the medium to be measured, which is then driven and amplified by the gear transmission mechanism. The value is indicated on the dial. There is also a zero adjustment device, which can easily adjust the zero position. The measurement range is -80~60000Pa, but different bellows pressure gauges should be selected according to the pressure range. It is recommended to use a disk box pressure gauge between -1000Pa and 60000Pa, and when it is -80Pa, it is recommended to use a rectangular bellows pressure gauge.
The difference between a diaphragm pressure gauge and a pressure gauge is as follows:
1. Ordinary pressure gauges are used to measure the pressure of oxidizing liquids and gases.
2. The diaphragm pressure gauge is usually used in two aspects:
(1) For food hygiene applications, when the pressure gauge is generally used to measure the pressure, the test object will not move outside the pressure gauge, so it is spread simply and repeatedly. The measurement principle of the bellows pressure gauge is as follows: adopting indirect measurement, creating deformation under the influence of the measured pressure, the sealing fluid is pressed, forming a pressure equal to P, which is transmitted to the pressure instrument to reveal the measured pressure value. It is suitable for measuring the pressure of liquid, gas or granular solid with high viscosity, easy crystallization, high oxidation and high temperature. Capsule pressure gauges have a variety of raw materials to adapt to a variety of different oxidation.
The bellows manometer uses the bellows as a sensitive element for measuring small pressures. It is widely used in boiler ventilation, gas pipelines, combustion devices and other similar equipment to measure the corrosion effect of copper alloys, the micro pressure and sound pressure of non-explosive dangerous gases.
(2) Measure the pressure when there is an application for oxidation resistance (the medium to be measured is oxidative, and different oxidizing media should adopt different diaphragm raw materials).
