A, product introduction
Bellows pressure because of the pressure sensor is composed of two pieces of corrugated metal diaphragm, so called bellows pressure gauge, it is different from the general pressure gauge of pressure on its energy pressure of relatively small, so it is also called micro pressure table, called the water table in Taiwan or micro pressure gauge, and because it usually used in gas equipment and gas piping so also someone called gas pressure gauge.The mechanical pressure gauge pressure sensitive components are usually connected by two pieces of circular corrugated metal diaphragm, also has a single diaphragm structure, its material is usually copper box of gold, such as phosphor copper, beryllium copper, used in special working environment or for special pressure medium usually choose stainless steel or other metal alloy, stainless steel usually type use SUS304, SUS316 or SUS316L type.
Principle of bellows pressure gauge is measuring the pressure of medium role in the bellows inside of the cavity, the resulting usually linear elastic deformation and pressure, pressure sensitive element deformation amplitude depends on the size of the medium pressure, can be used to indirectly measure the pressure of the medium.Pressure value by the size of the gear and the connecting rod is passed to the terminal indicating device (pointer and dial).Bellows pressure gauge are commonly used to measure the pressure of the gas, and energy micrometer, pressure range and the precision of measurement, often depends on the dial size (the size of the bellows) and the material of pressure sensitive element, PIONEER micro pressure table usually have over-voltage protection device, can to a certain extent, prevent damage of stress caused by the instrument, but its role is limited, can't rely on this feature, it is important to note that when choosing range so as to avoid unnecessary losses.When several bellows sensitive element stacked together will produce larger first to measuring the pressure of a tiny, heritability of bellows pressure gauge measuring range in 0 ~ 2.5 mbar to 0 ~ 1 bar, the precision of measurement in 0.1 ~ 5 level.For all the different at high altitude area, and using the instrument working environment temperature is different, because of its extremely sensitive pressure indicator, and will cause the pointer is not zero, PIONEER of micro pressure table have zero device, can be suitable for all kinds of working environment. Another PIONEER engineers suggest that the uniqueness of bellows pressure gauge because of its structure, in the measurement of liquid will be influenced by gravity and tension, precision will have fallen sharply, in theory, the bellows pressure gauge does not apply to measure liquid pressure, such as certain feature-the liquid micro pressure, please contact our technical department, we will serve you wholeheartedly.
Second, the technical parameters
Meter diameter※63mm(2.5inch)※70mm(2.75inch)※76mm(3inch)※100mm(4inch)※150mm(6inch)Type of installationRadial installation typeThe axial installation typeShaft assembly (flange) bring forward edge typePressure rangeVacuum type: - 76 ~ 0 cmHg (MAX)-1.5~0 KPa (MIN)Pressure vacuum type: 1 ~ 0 ~ 1 kpa (MIN)-30~0~30 KPa(MAX)Low voltage type: 0 ~ 250 pa...3 kpaMedium-pressure type: 0 ~ 3 kpa...50 kpaHigh pressure type: 0 ~ 50 kpa...100 kpaJoint the self-contained lines63 mm (2.5 inch) : M14 G1/4 * 1.5 or a quarter of the pt70 mm (2.75 inch) : G3/8 pt or 1/8 or 1/4 pt76 mm (3 inch) : M16 * 1.5 pt or G3/8 or 3/8100 mm (4 inch) : M20 G1/2 * 1.5 or 1/2 pt150 mm (6 inch) : M20 G1/2 * 1.5 or 1/2 ptShell materialCarbon steel of the lacquer that bake, iron shell plastic spraying and chrome plated iron shell, cast aluminum1 cr18ni9ti stainless steel (SUS304)Protection gradeIP65Pointer to the materialWith molding does aluminumPrecision gradeHeader: under the condition of the63 mm (2.5 inch) : 5% or 1.6% f.s. F.s70 mm (2.75 inch) : 2.5% or 1.5% f.s. F.s.76 mm (3 inch) : 2.5% or 1.5% f.s. F.s.100 mm (4 inch) : 1.5% or 1.0% f.s. F.s.150 mm (6 inch) : 1.0% or 0.6% f.s. F.s.Bellows materialBronze, phosphor copper, stainless steel SUS304, SUS316, SUS316LMachine core materialCopper alloy, stainless steel SUS316Installation environmentStainless steel shells: can adapt to acid, alkali or corrosion of stainless steel without gas or liquid mist working environment.All stainless steel class: can adapt to weak acid, weak base or of stainless steel corrosion of gas or liquid mist working environment.Joint materialCopper alloy, stainless steel SUS316Calibration unitmBar,kpa,mmAQ,mmHg, inH2O,mmWater, met H2O,mmH2O,paRecognized standardsGB1226-86/ASME B40.1Dial materialaluminumaccessoriesCertificate of approval, the directions for useShield ring material1 cr18ni9ti stainless steel (SUS304)Optional items* high temperature medium quality measuring optional: fin radiator, condenser radiator.* if you have any restriction on the installation position of optional: stainless steel connection pipe, stainless steel to extend connecting hoses.* such as larger pressure pulse used medium can choose to go: stainless steel pipe bending buffer or damper.* if necessary without or replacing pressure gauge non-stop nigt, partition pressure gauge and the measured medium pressure gauge switch is optional.Mirror materialThe force that press a gram, PC, glass, toughened glassThe use of temperature- 30 ~ 50 ℃ (working temperature higher than 80 ℃ recommend additional cooling device)Relative humidity10%~80%(RH)Ordering information1, please indicate the required pressure gauge header size.2, please indicate the range of pressure gauge required.3, please indicate the required pressure gauge installation form.4, please indicate the required pressure gauge interface type.5, please indicate the required working temperature gauge measurement medium.Applicable mediumIron shell and carbon steel shells: suitable for static pressure of copper and copper alloy non-corrosive gas or steam, such as air and gas, etc.Stainless steel shells: suitable for copper and copper alloy non-corrosive, the static pressure of a gas or vapour.All stainless steel: with 316 or 316 l stainless don't react the gas or vapour.
Three, characteristics
1, USES the overpressure prevent structure, can effectively prevent overvoltage caused the damage, prolong the life of the instrument. 2, the instrument has zero device, can effectively guarantee the pressure gauge can use in various areas, zero at any time. 3, different shell material can make the bellows pressure gauge has widely using space, dispense with the working environment of pressure gauge on the use of various constraints. 4, flexible installation, easy to remove.The appearance of bright display value more make use of equipment. 5, numerous pressure range, can better adapt to the requirement of customers. 6, a variety of bellows materials to choose from.
Fourth, exterior structure
Five, the selection of
Does common bellows pressure gauge used for measuring the copper and copper alloy non-corrosive gas or steam the small pressure.
Does the bellows vacuum gauge pressure gauge used for measuring the copper and copper alloy non-corrosive tiny negative pressure of gas or steam. Does the bellows pressure vacuum gauge used to measure of copper and copper alloy non-corrosive gas or vapour is tiny negative pressure, can be a dial indicator on positive pressure and negative pressure. Does the stainless steel bellows pressure gauge is suitable for the corrosive strong for stainless steel components to detect gas medium and severe external corrosion environment or wild, open, unusual working conditions, high temperature and high humidity, tiny pressure measuring gas or steam Does electric contact bellows pressure gauge Used to measure various explosive dangerous gas medium small pressure and measured pressure (control) system for automatic control and a letter (alarm).
Six, application
Our company production of micro pressure table adopts advanced technology and excellent craft, widely used in pipe terminal, according to the gas pressure is suitable for the measurement of the air and corrode the copper alloy micro pressure and negative pressure gas, the product is applied to gas burning equipment, coating systems and all kinds of industrial gas heating system, gas, natural gas pipeline project, the high pressure bellows pressure gauge is also applicable to coating equipment and spraying machinery, air pipeline, gas pipeline, burning device and other similar devices, such as building adjustable dividers, gasification station, gas station position, burner, boiler, oven, oven, kitchen utensils and appliances and other industrial equipment gas measuring display instrument, is also sometimes used to switch on the power industry, precise micromanometer mountain can also be used to measure atmospheric pressure, alternative altimeters, according to the change of the atmospheric pressure is used to determine altitude, and can according to change of atmospheric pressure to estimate the state of the weather.
Seven, use and maintenance
(1) meter must be installed vertically: should be used when the wrench to tighten, should not be strong torsional case;Transportation should avoid collision.
2 meter using appropriate at ambient temperature is 25 ~ 55 ℃.
(3) the use of the work environment vibration frequency < 25 hz, the amplitude is not greater than 1 mm.
(4) use arising from working environment temperature is too high or made into earth and use of low atmospheric pressure and temperature difference, instrument indicated value return to zero, or appear, indicating error please zero before use.
5] instrument using range, should be between the upper limit of 1/3 to 2/3.
[6] in gas medium or high temperature corrosive medium, please pay attention to the choice of stainless steel, and USES the safety glass mirror.
Once the instrument should be regular check (at least once every three months)
Being needed measuring instrument of corrosive medium, in order, shall indicate the requirements conditions such as medium material.
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