| Warranty: | 18 Months |
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| Accuracy: | 0.5% 1.0% 1.5% |
| Main Application: | Water, Wastewater, Diesel Fuel, Fuel Oil, Nature Gas, Corrosive Liquid/Gas, Gas, Liquid, Steam |
| Size: | DN15-DN2000 |
| Sensor: | Throttling Gear |
| Application: | Industrial Production |
| Samples: |
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| Customization: |
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features
High linearity and good repeatability
Because the HJP series porous balance flow sensor has the characteristics of porous symmetrical structure and a large number of test data show that the porous balance flow sensor can balance the flow field, reduce the eddy current, reduce the vibration and signal noise, greatly improve the stability of the flow field, and make the linearity It is 5~10 times higher than the orifice plate, and the repeatability is increased by 54% to 0.15%. From the perspective of its comprehensive performance, the porous orifice flowmeter has high-end flowmeter performance and can be used for trade measurement.
Linearity up to ±0.3% at 5:1 turndown
Linearity up to ±0.7% at 7:1 turndown
Linearity up to ±1.0% at 10:1 turndown
overview
There are many ways to measure the flow of the medium through the pipeline, but the most widely used and common is the differential pressure flowmeter. It is composed of throttling device and multi-parameter transmitter or differential pressure transmitter together with the secondary table, the throttling device is a differential pressure measurement component, people use it in the pipeline to make the fluid pressure difference, the use of the pressure guide tube before and after the throttling device produced by the differential pressure transfer to the multi-parameter transmitter or differential pressure transmitter, and then input to the secondary instrument, It shows the instantaneous flow or cumulative flow of the fluid in the pipe. Throttling device has a long history and has been standardized both at home and abroad. The throttling device includes standard orifice plate, nozzle, non-standard orifice plate, etc. Can measure the flow of liquid, steam, gas, it is widely used in petroleum, chemical, metallurgy, electric power, light industry and other sectors.
Working principle
When the fluid filled with pipe flows through the throttling part in the pipe, the flow rate will form a local contraction at the throttling part, so the flow rate increases, the static pressure decreases, and the pressure difference is generated before and after the throttling part. The larger the fluid flow rate, the larger the pressure difference, so that the flow rate can be measured according to the pressure difference. This measurement method is based on the flow continuity equation (law of conservation of mass) and Bernoulli equation (law of conservation of energy). (The pressure difference depends not only on the flow rate but also on many other factors. For example, when the form of throttling device or the physical properties of the fluid in the pipeline (density, viscosity), the pressure difference produced at the same flow rate is different.) So by measuring the differential pressure, the flow rate can be measured.
characteristic
Throttle device structure is easy to copy, simple, firm, stable and reliable performance, long service life, low price.
Orifice plate calculation adopts international standard and processing. All single-phase flows can be measured and some miscible flows can be applied. Standard throttling devices can be used without real current calibration. One type orifice plate is simple to install, no pressure tube, can be directly connected to the differential pressure transmitter and pressure transmitter.
Structure type
Angular pressure standard orifice plate belongs to standard orifice plate. It is also divided into ring chamber pressure and separate hole Angle pressure. As the pressure is taken directly from both ends of the orifice plate, the measurement accuracy is improved and the minimum length of the straight pipe section required for installation is shortened. It can be used universally.
Flange pressure standard orifice plate: belongs to the standard orifice plate. No matter the diameter of the pipe, the center of the upper and downstream pressure extraction holes are located 1 inch (25.4mm) away from the end face of the hole plate on both sides. This form is widely used in the oil refining system.
Standard orifice plate: It belongs to standard orifice plate. The pressure taking mode is pipeline pressure taking. The center of the upstream pressure taking hole is located at one times the inner diameter of the pipeline in front of the orifice plate, and the center of the downstream pressure taking hole is located at a place half of the inner diameter of the pipeline from the rear end face of the orifice plate.
Nozzles: Nozzles are divided into long neck nozzles, ISA-1932B standard nozzles and non-standard nozzles. Its pressure loss is small, mainly used in power industry main steam flow measurement and flow control detection system.
Embedded (integral) orifice plate: a non-standard orifice plate. For measuring fluid in 10 mm to 50 mm diameters.
Double orifice plate: a non - standard orifice plate. It is composed of two standard orifice plates installed in a straight pipe at a certain distance from each other. According to the direction of the flow beam, the front orifice plate is called the auxiliary orifice plate, and the back orifice plate is called the main orifice plate. The section ratio of the auxiliary orifice plate is larger than that of the main orifice plate m. The two orifice plates form a nozzle similar to that with liquid wall, which is used for the flow measurement of low Reynolds number fluid or high viscosity fluid.
Round hole plate: a non-standard hole plate. It is suitable for the measurement of the fluid flow of dry and dirty, or with bubble precipitation, or containing solid particles, and the measurement accuracy is low.
High pressure lens orifice plate: It belongs to standard orifice plate. High mechanical strength, excellent material, good high temperature and high pressure resistance. Suitable for all kinds of high temperature, high pressure liquid, gas or superheated steam flow measurement with pressure greater than 20MPa.
Venturi: double Venturi is used to measure smoke, air, air volume and other media, it has almost no resistance loss, large differential pressure signal, high pressure sensitivity, stable performance, reliable work, simple structure, convenient maintenance and other advantages, suitable for large flow, large pipe diameter especially rectangular pipe flow measurement, is the ideal device for measuring low velocity large flow volume measurement.
Main technical parameters
Accuracy grade :±0.5%, ±1%, ±1.5%
Nominal diameter :10mm~DN1000mm
According to the national standard GB/T2624-93 design and manufacture
Verification according to the national verification regulations JJG 640-94
Pressure method: Angle pressure, flange pressure, D-D/2 pressure
Nominal pressure :0.6~32(MPa)
Medium under test: liquid, gas, steam, other mixed media
Measured medium temperature :-10ºC~+450ºC
Straight pipe length requirements and throttling device installation in accordance with GB/T26224-93 relevant provisions
overview
HX3052 multi-parameter transmitter is a new type of intelligent transmitter which integrates differential pressure, pressure, temperature transmitter and flow integrator. Display pressure, differential pressure, temperature, instantaneous flow and cumulative flow at the same time. Can replace intelligent differential pressure transmitter, pressure transmitter, temperature transmitter and flow integrator 4 instruments.
Easy to install, no need to debug, install can be used. And can automatically calculate the temperature and pressure compensation for gas, steam and other media, and realize the direct display of parameters such as standard flow rate. The multi-parameter transmitter works with 24V power supply and built-in lithium battery. In the case of external 24V power supply, it can provide current 4-20mA(two-wire system) or RS485(four-wire modbus-rtu system) for remote transmission.
The multi-parameter transmitter can be directly matched with any differential pressure type standard throttling device (V cone flow sensor, orifyplate flow sensor, elbow flow sensor, nozzle flow sensor, Venturi single flow sensor, Aniuba flow sensor, Weiba flow sensor, Bitoba flow sensor, wedge flow sensor, Delta flow sensor, uniform pitot tube flow sensor, etc.) Used to form a multi-parameter differential pressure flowmeter (V cone flowmeter, orifice flowmeter, variable tube flowmeter, nozzle flowmeter, venturi flowmeter, A Niuba flowmeter, Weiba flowmeter, Bitoba flowmeter, wedge flowmeter, Delta flowmeter, uniform pitot tube flowmeter, etc.).
The introduction of multi-parameter transmitter brings a revolution of differential pressure flowmeter, which is more convenient for customers to use. This kind of multi-parameter transmitter has made a major breakthrough in the micro power consumption (built-in lithium battery can be self-powered for 2-3 years) range ratio (up to 1:500) micro differential pressure (10pa-1500pa).
Suitable for all differential pressure flow sensors
It can be powered by battery and can work for 2-3 years without external power supply on site (no output).
Full isolation output super anti-interference design, shielding all interference
Power supply 24VDC(4-20mA two-wire system or RS485 communication four-wire system)
Built-in temperature and pressure sensor
Automatic temperature and pressure compensation for gas and steam
The range ratio is 1:2000/1:4000/1:500
Precision class 0.25
Gas can display temperature, pressure, standard flow and other parameters
Steam can display temperature, pressure, mass flow and other parameters
The flow sensor linearity can be corrected in ten stages
Differential pressure can be measured at a minimum of 10Pa
Users do not need to do any debugging installation to use high reliability, users do not need to do any maintenance
Chongqing Hongxing Instrument Co., Ltd. is a high-tech industrial enterprise specializing in R&D, production, sales, and service of industrial automation instruments. The company has introduced advanced technology from developed countries, combined with its own years of industry experience, developed various automation control instruments and industrial automation process instruments, which have been widely used in metallurgy, chemical industry, electric power, light Industrial, thermal power, machinery, hydraulic, boiler, paper, pharmaceutical, and other industries.
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