Beijing North Ruida Medical Technology Co., Ltd! 
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 Welcome to telephone consultation! 
 Contact: Miss Li 
 Tel: 18,910,282,511 15,303,362,410 15,303,362,401 15,369,678,940 
 E-mail: 1508566524@qq.com 
 Fax :010 -58,411,891 
 Address: Langfang City, Hebei Province, North Industrial Park Gu'an Gu'an 
 Postal Code: 065500 
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 Power bar meter Model: JNZYV150 bank number: M394978 
 Power bar meter JNZYV150 more>>> 
 midwest-group 
 West Group 

 First, an overview 

 Verabar Pitot tube is based on principles of design and production of a new type of plug-flow measuring device. Average rate mainly reflected Verabar average rate of flow of the latest research results. Sensors, such as bullet shape, in line with the principle of fluid dynamics, to produce accurate, stable and reliable differential pressure signal, high strength, impermeable, anti-clogging. Has high accuracy, reliability, and good stability. Can be used to measure gas, liquid, steam and corrosive media and other fluids, to adapt to various sizes of pipes used in high temperature and pressure of the occasion. 
 Second, the measurement principle 
 JNZY-250B average rate Verabar is a plug-flow measuring device. Inserted in a pipeline Verabar average rate, when the fluid flow through the meter, in its front (Ying flow direction) to generate a high voltage distribution, the Department produces a low pressure in the following 
 Distribution. Meter in high and low pressure area has arranged more according to certain rules to take pressure of the hole, the whole fluid pressure were measured (including static pressure and average velocity pressure) Pl and static pressure P2. P1 and P2 were introduced into the differential pressure transmitter, pressure measuring travel △ = P1-P2, △ P reflects the size of the average velocity of fluid in order to calculate the fluid flow. 

 Flow calculation formula 
 Where:, - are the mass flow rate (kg / s) and volume flow (m3 / s); 
 - Flow coefficient; 
 - Can be expansion coefficient; 
 - Pipe diameter, m; 
 - The measured fluid density, kg / m; 
 - Differential pressure, Pa; 
 Design Features 
 (1) the bullet shape of the special process 
 Average rate used Verabar sectional shapes such as bullet-shaped probe, integrated dual-chamber stainless steel corrosion resistant metal construction, high-pressure hole in the front of the probe to form a high pressure zone, to prevent fluid particles into the take the pressure hole, low-voltage lateral holes in both sides of the probe, the probe in the fluid and before the separation point can reduce the likelihood of low pressure holes are blocked. In the front surface of the metal probe, for the rough treatment, according to the principles of aerodynamics, fluid flow through the rough surface, forming a stable turbulent boundary layer, enabling the state to improve the measurement accuracy of low flow, making the fluid in the low speed, probe can be stable and accurate differential pressure signal, which extends the lower limit of sensor range, flow coefficients remain stable. 
 (2) attempts to prevent a significant effect 
 Average rate Verabar its attempts to prevent a significant effect, solve the other the average rate of flow meter probe is easy to plug into the issue, so that the average rate of flow of the attempts to prevent the situation reached a new level. First, the average rate of the power bar meter (probe) flow side of the welcome will not plug the hole pressure in the flow meter has just put into operation, the fluid under the effect of static pressure in the pipeline, high voltage probe entered the chamber hole, and soon formed pressure equilibrium. When the pressure balance can be formed, not into the high-pressure fluid hole, due to high pressure at the inlet face and bypass, to probe both sides of the shunt becoming more open to leave, the back of the probe to form a vortex, under normal circumstances, particles impurities in the vortex under the action of traction, concentrated in the rear of the probe, due to low pressure on both sides of the hole in the probe and fluid separation point trails the front, so to avoid impurities in the low hole gathering area, and attempts to prevent the realization of the nature eddy current signal generated by fluctuations. Therefore, the average rate on a fundamental Verabar prevent clogging, and thus produce a very stable differential pressure signal. 

 3, Features 
 1, the differential pressure signal stability, high accuracy, attempts to prevent the design, minimal pressure loss, low energy consumption, maintenance-free. 
 2, the unique structure, integrated dual-chamber structure, high strength, high temperature and pressure to adapt to situations. 
 3, the wide range of applications to adapt to various sizes of tube and square tube. 
 4, with the temperature, pressure measurement, the density compensation. 
 5, opening a small, easy to install, straight pipe requirements low, installation and maintenance line with pressure. 

 Fourth, the main technical parameters 
 1, the range ratio: the case of the pressure to meet the range 1:10; 
 2, Universal diameter: 8mm ~ 15000mm; 
 3, straight pipe requirements: Normally before 7D, after the 3D to ensure measurement accuracy of 0.5% to 1.0%; 
 4, measurement accuracy: ± 0.5% ~ ± 1.0%; 
 5, Repeatability: ± 0.1%; 
 6, applied pressure: 0 ~ 25Mpa, special applications up to 40Mpa; 
 7, suitable temperature: -100 ℃ ~ 500 ℃, for special applications up to 800 ℃; 
 8, Medium: air, gas, gas, water, boiler feed water, with rotten solution, steam and other liquid media 
 9, reference standard: ISO 3966-197, JB/T5325-1991 and GB/T2624-2006 
 10, connection: Plug-in flange, plug-in threaded connections, pipe flange connections, pipe-thread connection 

 V. Structure 
 According to the average rate of the power bus structure and form of the average rate of installed power of Pakistan can be divided into: split, integration, installation with a pipe structure. 
 Power bar meter JNZYV150