What are the different types of pressure gauges? There are several types of pressure gauges

Stainless steel diaphragm box pressure gauge.

Stainless steel diaphragm pressure gauge is a corrosion-resistant micro-pressure gauge developed with reference to the structural characteristics of the original diaphragm pressure gauge. It is used in boiler ventilation and gas pipelines and other equipment to measure the micro pressure and negative pressure of various gas media in the process with high corrosion resistance requirements. It is an ideal supporting product for domestic users to realize the localization of similar instruments in the introduction of foreign advanced technology and equipment.

Structural principle: The instrument is composed of a measuring system including joints, corrugated diaphragm boxes, etc., a transmission mechanism including a pulling rod mechanism, a gear transmission mechanism, an indication component including a pointer and a dial, and a shell including a case, a lining ring and a watch glass. The working principle of the instrument is based on the corresponding elastic deformation of the free end of the corrugated diaphragm box under the pressure of the measured medium, and then it is driven and amplified by the gear transmission mechanism, and the measured value is indicated on the dial by the pointer fixed on the gear shaft.

There is also a zeroing device, which can easily adjust the zero position.

Stainless steel pressure gauge.

Stainless steel pressure gauges are widely used in petroleum, chemical, chemical fiber, metallurgy, power stations and other industrial sectors to measure the pressure of various fluid media in the process of high requirements for corrosion resistance and vibration resistance. The overall structure of the stainless steel pressure gauge is reasonable in design, exquisite in process, with high measurement accuracy and lasting stability, so it can not only provide exports, but also domestic users for the introduction of foreign advanced technology and equipment in the similar instruments to achieve localization of ideal supporting products.

Structural principle: The instrument is composed of a pressure guide system including joints, springs, current limiting screws, gear transmission mechanism, indicator pointer and dial and shell including case, cover, glass, etc. The shell is an airtight structure, which can effectively protect the internal parts from environmental influences and dirt ingress.

For instruments that are generally filled with silicone oil or glycerin in the housing, it can resist the vibration of the working environment and reduce the pulsating effect of the medium pressure.

Seismic pressure gauge.

It is used to measure the pressure of non-corrosive, non-corrosive, non-crystallized, non-precipitating gases or liquids on copper and copper alloys. The most important feature of the seismic pressure gauge is that it can measure the pressure normally in the machine tool or equipment with severe vibration. The seismic grade is suitable for measuring the pressure of machinery and equipment in the place of intense vibration with frequent pressure pulses and long-term working conditions, and can be used instead of general pressure gauges.

Ten ways to classify pressure gauges.

According to its measurement accuracy, pressure gauge can be divided into precision pressure gauge and general pressure gauge. The measurement accuracy levels of precision pressure gauges are as followsLevel 4; The measurement accuracy level of the general pressure gauge is as follows

Level 0. Pressure gauge according to its measurement benchmark: pressure gauge according to its indication of pressure benchmark is different, divided into general pressure gauge, absolute pressure gauge, stainless steel pressure gauge, differential pressure gauge.

The general pressure gauge is based on atmospheric pressure; The absolute pressure gauge is based on absolute pressure zero; A differential pressure gauge measures the difference between two pressures to be measured.

According to its measurement range, pressure gauge is divided into vacuum gauge, pressure vacuum gauge, micro pressure gauge, low pressure gauge, medium pressure gauge and high pressure gauge. Vacuum gauges are used to measure pressure values that are less than atmospheric pressure; The pressure vacuum gauge is used to measure the pressure value less than and greater than the atmospheric pressure; Micropressure gauges are used to measure less than 60000

pressure value of PA; The low pressure gauge is used to measure the pressure value of 0 6MPa; Medium pressure gauge is used to measure 10 60MPa pressure value;

Pressure gauges are divided into pointer pressure gauges and digital pressure gauges according to their display methods.

Pressure gauge according to its use function: pressure gauge can be divided into local indication type pressure gauge and live signal control type pressure gauge according to its different use functions.

Generally, pressure gauges, vacuum pressure gauges, seismic pressure gauges, stainless steel pressure gauges, etc. are all local indication pressure gauges, and there is no other control function except for the indicated pressure.

Choose a pressure gauge and come to Tianjin to make an instrument.

<> pressure gauge. There are general pressure gauges, vacuum pressure gauges, seismic pressure gauges, stainless steel pressure gauges, pressure vacuum gauges, etc.

1. General pressure gauge: refers to the instrument that uses the spring tube as the sensitive element of the elastic element to measure and indicate the pressure higher than the environment.

2. Vacuum pressure gauge: atmospheric pressure.

It is used as a benchmark to measure instruments that are less than atmospheric pressure.

3. Seismic pressure gauge: This series of instruments has good seismic performance, especially suitable for strong mechanical vibration and severe fluctuation of medium pressure.

4. Stainless steel pressure gauge: stainless steel pressure gauge is widely used in petroleum, chemical, chemical fiber, metallurgy, power station, food and other industrial sectors with high requirements for corrosion resistance and high temperature resistance.

The pressure of various fluid media is measured.

5. Pressure vacuum gauge: The pressure vacuum gauge is widely used in gas transportation, pipeline liquids and closed containers to measure the pressure of various liquids, gases, steam and other media without corrosiveness, no danger, no crystals and non-condensable solids. It has the advantages of simple structure, high cost performance, intuitive indication and reliable performance.

Pressure gauges are divided according to the type of display: digital pressure gauge, mechanical pressure gauge, and the pressure gauge we usually say are all pointer pressure gauges.

Pressure gauges are divided into general pressure gauges, pressure vacuum gauges and vacuum pressure gauges according to the type of measurement.

According to the use environment, there are ordinary pressure gauges, seismic pressure gauges, stainless steel pressure gauges, phenolic shell pressure gauges, etc.

According to the accuracy: precision pressure gauge, general pressure gauge.

According to the use requirements: electric contact pressure gauge, oxygen pressure gauge, ammonia pressure gauge, acetylene pressure gauge, etc.

According to the diameter size: generally 40 50 60 75 100 150 160 200 250, etc., commonly used as 60; 100mm

According to the installation method: generally there are radial installation, axis installation, thread installation, flange installation, clamp quick assembly, back flange side installation, etc.

Large pressure gauge manufacturers, Shanghai No. 4 Factory (Baiyun), Brady (BLD), Shanghai Jingfu (J&F), imported WIKA (WIKA).

Various classifications are different, hopefully.

The classification methods of pressure gauges are: 1, according to the different elastic elements of the pressure gauge, it can be divided into:

A, C spring tube pressure gauge;

b, coil spring tube pressure gauge;

c, diaphragm pressure gauge;

d, diaphragm pressure gauge;

e, bellows pressure gauge.

2. According to the different uses of pressure gauges, it can be divided into:

a. General purpose pressure gauges such as general pressure gauges, oxygen pressure gauges, ammonia pressure gauges, electrical contact pressure gauges, etc.

b. Special purpose pressure gauges such as diaphragm pressure gauge, anti-corrosion pressure gauge, seismic pressure gauge, diaphragm box pressure gauge, etc.

3. According to the different pressures to be measured, it can be divided into:

a. Micro pressure gauge measuring range: below 10000pa;

b, low pressure pressure gauge measuring range: 10-600kpa;

c, Medium pressure gauge measuring range:;

d, high pressure gauge measuring range: 10-600MPa;

e, ultra-high pressure pressure gauge measuring range: more than 600MPa.

4. According to the accuracy of the pressure gauge, it can be divided into:

a, general pressure gauge - accuracy for grade 1, grade, grade, grade 4;

b, precision pressure gauge - the accuracy is grade, grade, grade, grade.

5. According to the different installation methods of the pressure gauge, it can be divided into:

a, threaded connection pressure gauge;

b, disc connection pressure gauge;

c, flange connection pressure gauge;

d, clip-type connection pressure gauge.

Abstract:In the major industrial fields and scientific research fields, it is necessary to test the pressure, so the pressure gauge will be used, which is composed of overflow holes, pointers, glass panels, throttle valves and other parts, through the internal sensitive elements under the action of pressure elastic deformation, and then the pressure deformation is transmitted to the pointer, causing the pointer to rotate to show the pressure. The application of pressure gauge is wide, and there are many types, such as Bourdon tube pressure gauge, diaphragm box pressure gauge, explosion-proof pressure gauge, explosion-proof pressure gauge, etc., and the appropriate type should be selected according to the production requirements.

Let's take a look at the types of pressure gauges. 1. What kind of instrument is the pressure gauge?

Pressure gauge, as the name suggests, is an instrument used to measure pressure, which is a sensitive element with an elastic element as a sensitive element to measure and indicate higher than the ambient pressure, which is widely used in major industrial fields.

The structure of the pressure gauge is composed of overflow holes, pointers, glass panels, throttle valves and other parts, and its basic principle is through the elastic deformation of the sensitive elements in the gauge (Bourdon tube, diaphragm box, bellows), and the pressure deformation is transmitted to the pointer by the conversion mechanism of the movement in the gauge, causing the pointer to rotate to display the pressure.

The function of the pressure gauge is to measure and indicate the pressure in the pressure product, help the operator to operate the pressure product correctly, and ensure safe and economical operation, which is widely used in industrial processes and scientific research fields such as thermal pipe network, oil and gas transmission, water supply and gas supply system, vehicle repair and maintenance plant shop, etc.

2. There are several types of pressure gauges.

There are many types of pressure gauges, which can be mainly divided into the following categories:

1. Bourdon tube pressure gauge.

It is a kind of pressure gauge through the deformation of the Bourdon tube, the movement indirectly displays the pressure of the measured medium by the pointer, and the sensitive element of the Bourdon tube is an elastic C-shaped tube bent into a circle, and the cross-sectional area is oval, and a certain ring stress will be formed due to the slight deformation of the Bourdon tube. This ring stress causes the Bourdon tube to extend outward, and the magnitude of its deformation depends on the pressure of the medium in which the Sparrow is measured.

2. Diaphragm box pressure gauge.

The sensing element of the diaphragm cassette consists of two wavy diaphragms connected together in a circular mold, and the deformation generated by the diaphragm cassette can be used to indirectly measure the pressure of the medium, which is generally used to measure the pressure of the gas.

3. Explosion-proof pressure gauge.

It is mainly used in flammable and explosive occasions, and can be divided into intrinsically safe explosion-proof pressure gauge and flameproof pressure gauge according to the explosion-proof coefficient; According to the performance, it can be divided into electric contact explosion-proof pressure gauge, pointer explosion-proof pressure gauge, digital display explosion-proof pressure gauge, etc.

4. Vacuum pressure gauge.

Vacuum pressure gauge is based on atmospheric pressure, used to measure greater than and less than atmospheric pressure of the instrument, often used to measure steel, copper and copper alloy non-corrosive, non-condensing liquid Danshan, gas or vapor medium pressure or negative pressure, including seismic vacuum pressure gauge, electric contact vacuum pressure gauge, stainless steel pressure vacuum gauge, acid pressure vacuum gauge, etc.

A general pressure gauge is a gauge used to measure the pressure of gases, vapors and liquids that do not corrode copper and copper alloys. Generally, the main components of the pressure gauge that are in contact with the working medium to be measured (such as joints and spring tubes) are made of copper or copper alloy. It has good anti-corrosion and anti-rust properties.

The highest accuracy of the general pressure gauge is 1 class 0, and the general pressure gauge includes a pressure gauge, a vacuum gauge and a pressure vacuum gauge.

General pressure gauges have the following advantages:

1) Simple structure, reliable and durable, easy to use and maintain.

2) Small shape, light weight, wide measurement range, obvious indication, direct reading.

3) There is sufficient accuracy and good stability of the indication value.

4) Inexpensive.

Pressure gauge refers to an instrument that uses an elastic element as a sensitive element to measure and indicate a pressure higher than the environment, and is widely used in almost all industrial processes and scientific research fields. It can be found everywhere in the fields of thermal pipe network, oil and gas transmission, water supply and gas supply system, vehicle repair and maintenance plant and shop.

Especially in the process of industrial process control and technical measurement, mechanical pressure gauges are more and more widely used due to the high mechanical strength and convenient production characteristics of the elastic sensing elements of mechanical pressure gauges.

The pressure gauge transmits the pressure deformation to the pointer through the elastic deformation of the sensitive elements in the gauge (Bourdon tube, diaphragm box, bellows), and then conducts the pressure deformation to the pointer by the conversion mechanism of the movement in the gauge, causing the pointer to rotate to display the pressure. The pressure gauge transmits the pressure deformation to the pointer through the elastic deformation of the sensitive elements in the gauge (Bourdon tube, diaphragm box, bellows), and then conducts the pressure deformation to the pointer by the conversion mechanism of the movement in the gauge, causing the pointer to rotate to display the pressure.

Upper limit of measurement: 1. The size of the upper limit of the pressure gauge is designed according to the outer dimensions, stiffness and nonlinear conditions of the spring tube, and the upper limit of measurement has 1 10N, five series, and N is a positive integer, a negative integer or zero.

2. Digital pressure gauge pressure range: -100kpa 2kpa 260mpa.

3. The accuracy of the pressure gauge is lower than 1 3 and the range part is low, so it should not be used. When selecting the upper limit of measurement, in order to ensure the safe and reliable operation of the pressure gauge and maintain its service life, it should generally be greater than 1 3 of the maximum operating pressure.

4. When selecting the range of use, according to the versatility of the load condition, it is advisable to choose 1 3 2 3 of the full scale, because the accuracy of this range of use is high, and it can be used under both stable and fluctuating loads. The maximum range of use shall not exceed 3 4 of the full scale of the dial.