Basic Info.
Type
Resonant Pressure Sensor
Component
Mechanical Structure Type
For
Strain Gauge Pressure Transmitter
Output Signal Type
Direct Display
Production Process
Integration
Wiring Type
Threaded Connection
Product Description
Pressure gauge product introduction
Pressure gauge refers to the instrument with elastic element as the sensitive element to measure and indicate the pressure higher than the ambient pressure. It is widely used. It covers almost all industrial processes and scientific research fields. It can be seen everywhere in the fields of heating pipe network, oil and gas transmission, water supply and gas supply system, vehicle maintenance plants and stores. Especially in the process of industrial process control and technical measurement, because the elastic sensitive element of mechanical pressure gauge has the characteristics of high mechanical strength and convenient production, mechanical pressure gauge has been more and more widely used.
working principle
The pressure gauge displays the pressure through the elastic deformation of the sensitive elements (Bourdon tube, bellows and bellows) in the gauge, and then the pressure deformation is transmitted to the pointer by the conversion mechanism of the movement in the gauge, causing the pointer to rotate.
Main classification
There are many kinds of pressure gauges, including not only general (ordinary) pointer indication type, but also digital type; There are not only conventional types, but also special types; There are not only contact type, but also remote transmission type; There are not only vibration resistant type, but also seismic type; There are not only diaphragm type, but also corrosion-resistant type. The pressure gauge series is complete. It has not only conventional series, but also digital series; There are not only ordinary media application series, but also special media application series; There are not only switch signal series, but also remote signal series. They all come from practical needs and form a complete series successively. The specifications and models of the pressure gauge are complete and the structural type is perfect. From the nominal diameter, there are Φ 40mm, Φ 50mm, Φ 60mm, Φ 75mm, Φ 100mm, Φ 150mm, Φ 200mm, Φ 250mm, etc. There are radial convex mounting type and axial convex mounting type, which can also be divided into axial convex mounting type and axial convex mounting type. Direct installation type is divided into radial direct installation type and axial direct installation type. Radial direct installation type is the basic installation type. Generally, when the installation structure type is not specified, it refers to radial direct installation type. Considering the stability of its own support, the axial direct installation type is generally selected only for pressure gauges with nominal diameter less than 150mm. The so-called embedded and convex pressure gauges are what we often call pressure gauges with edges (mounting rings). The axial embedded type refers to the axial forward band edge, the radial embedded type refers to the radial forward band edge, and the radial convex type (also known as wall mounted) refers to the radial backward band edge pressure gauge. From the perspective of measurement 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. Each range section is subdivided into several measurement ranges (instrument range); In the negative pressure range (vacuum), there are three kinds of negative pressure (vacuum meter); The pressure gauge with positive pressure and negative pressure is a kind of pressure gauge across the range. Its specification name is pressure vacuum gauge, also known as vacuum pressure gauge. It can measure not only positive pressure but also negative pressure. The accuracy classification of pressure gauge is very clear. Common accuracy levels include level 4, 2.5, 1.6, 1, 0.4, 0.25, 0.16, 0.1, etc. Generally, the accuracy grade should be marked on its dial, and its identification also has corresponding provisions. For example, "" indicates that its accuracy grade is grade 1. For some pressure gauges with low accuracy level, such as those under level 4, others do not need to measure their accurate pressure value and only need to indicate the pressure range, such as the pressure gauge on the fire extinguisher, the accuracy level can not be marked.According to its measurement accuracy, pressure gauge can be divided into precision pressure gauge and general pressure gauge. The Measurement Accuracy grades of precision pressure gauge are 0.1, 0.16, 0.25, 0.4 and 0.05 respectively; The Measurement Accuracy grades of general pressure gauges are 1.0, 1.6, 2.5 and 4.5 respectively Level 0.
Pressure gauges are divided into general pressure gauges, absolute pressure gauges, stainless steel pressure gauges and differential pressure gauges according to their measurement datum: pressure gauges are divided into general pressure gauges, absolute pressure gauges and differential pressure gauges according to their indicated pressure datum. The general pressure gauge is based on atmospheric pressure; The absolute pressure gauge is based on the zero position of absolute pressure; The differential pressure gauge measures the difference between the two measured pressures.
The pressure gauge is divided into vacuum gauge, pressure vacuum gauge, micro pressure gauge, low pressure gauge, medium pressure gauge and high pressure gauge according to its measurement range. Vacuum gauge is used to measure the pressure value less than atmospheric pressure; Pressure vacuum gauge is used to measure the pressure value less than and greater than atmospheric pressure; Micro pressure gauge is used to measure the pressure value less than 60000 Pa; Low pressure gauge is used to measure 0 ~ 6Mpa pressure value; The medium pressure gauge is used to measure the pressure value of 10 ~ 60MPa;
According to its display mode, the pressure gauge is divided into pointer pressure gauge and digital pressure gauge.
Pressure gauges are divided according to their use functions: pressure gauges can be divided into local indicating pressure gauges and live signal control pressure gauges according to their use functions.
Installation modeAccording to the threaded joint and installation method, the instruments in article 4.1.2 of the national standard of pressure gauge general pressure gauge GB / t1226-2001 are divided into direct installation pressure gauge, embedded (panel mounted) pressure gauge and convex (wall mounted) pressure gauge.
1. The installation position of the pressure gauge shall meet the requirements of the installation state. Generally, the dial shall not be placed horizontally. The height of the installation position shall be convenient for the staff to observe.
2. The distance between the installation position of the pressure gauge and the pressure measuring point shall be as short as possible to ensure good sealing and no leakage.
3. There shall be a buffer at the front end of the installed pressure gauge; In order to facilitate inspection, a shut-off valve shall be installed under the instrument; When the medium is dirty or has pulse pressure, filter, buffer and stabilized pressure gas can be used
Accuracy level
1. The accuracy grade of the pressure gauge reflects the accuracy of the indicated value close to the real value in the comparison between the tested gauge and the precision gauge. It is equal to the percentage of the ratio of the absolute value of the maximum basic error to the upper limit of measurement, which is determined according to the error generated in the calibration.
2. China's general industrial pressure gauges are divided into four accuracy levels, which comply with the allowable error of the pressure gauge in the verification regulation of spring tube general pressure gauge, pressure vacuum gauge and vacuum gauge (jjg52-1999). The four accuracy levels are: Level 1, level 1.6, level 2.5 and level 4. The allowable error (calculated as a percentage of the upper limit of measurement) is ± 1%, ± 1.6%, ± 2.5% and ± 4% respectively.
3. China's new verification regulation of digital pressure gauge was published and implemented in 2005, which is in line with jjg875-2005 verification regulation of digital pressure gauge. The accuracy of pressure is specified as ± 0.01%, ± 0.02%, ± 0.05%, ± 0.1%, ± 0.2%, ± 0.5%, ± 1.0% and ± 1.6% respectively.
4. The method of reasonably selecting the accuracy grade of pressure gauge shall be based on the requirements of production process, economy and practicality, detection method, etc., and the accuracy grade shall be selected according to the allowable error required by the minimum value of the measured pressure.Overhaul and maintenance
1. After a period of use and pressure, the movement of the pressure gauge will inevitably appear some deformation and wear, and the pressure gauge will produce various errors and faults. In order to ensure its original accuracy without distortion of quantity value transmission, it shall be replaced in time to ensure that the indication is correct, safe and reliable.
2. The pressure gauge shall be cleaned regularly. Because the inside of the pressure gauge is not clean, it will increase the wear of all parts, which will affect its normal work. In serious cases, the pressure gauge will fail and be scrapped.
3. According to jjg52-1999, the verification cycle of the pressure gauge installed at the pressure measuring part generally does not exceed half a year. For pressure gauges related to production safety and environmental monitoring, the verification cycle must be in accordance with the verification regulations and can only be less than half a year; If the industrial and mining conditions are bad, the verification cycle must be shorter.
4. If the medium at the pressure measuring part fluctuates greatly, is used frequently, has high accuracy requirements, and has strict requirements on safety factors, the verification cycle can be appropriately shortened according to the specific situation.
Address:
607-2803 Oak Bay Residence, Huishan District, Wuxi, Jiangsu, China
Business Type:
Manufacturer/Factory
Business Range:
Electrical & Electronics, Industrial Equipment & Components, Instruments & Meters, Manufacturing & Processing Machinery, Tools & Hardware
Management System Certification:
ISO 9001
Company Introduction:
At present, Wuxi Yuansheng New Energy Equipment Co., Ltd. Takes liquid level transmitter, thermocouple, thermal resistance, bimetallic thermometer, flow instrument, pressure instrument, pressure transmitter, regulating valve, gate valve, stop valve, ball valve and pipe valve as the leading products, takes market demand as the guidance, and takes continuous innovation, research and production of new automatic instruments as its own responsibility. The company has completed product design, raw material procurement, production and processing, logistics and transportation Efficient industrial chain integration of order processing, wholesale operation and terminal retail. Through years of hard work, the enterprise has formed a large-scale enterprise - Wuxi Yuansheng New Energy Equipment Co., Ltd. With its own efforts and the strong support of the majority of users, it has been growing and has made achievements recognized by the industry. The products are exported to more than 20 provinces, cities and autonomous regions across the country. In the fierce market competition, the enterprise has made the products increasingly mature and perfect in the spirit of "seeking new and pragmatic". Being imitated all the time and never being surpassed is the firm business philosophy of Wuxi Yuansheng, which constantly updates equipment and introduces professional and technical personnel. It has formed a modern management and operation system integrating development, production and sales. The production process is strictly controlled to ensure that the product quality reaches the standard. Its strong strength is favored by customers. We also look forward to the presence and cooperation of new customers.
