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LWQJ Intelligent Gas Turbine Flowmeter
LWQ series gas intelligent turbine flowmeter is a new generation of high-precision, high-reliability integrated temperature, pressure, flow sensor and intelligent flow totalizer developed by our company in accordance with ISO9951 standard and combined with advanced technology of domestic and foreign flow meters Precision metering instrument with multiple * technologies, its excellent low- and high-pressure metering performance, multiple signal output methods, and low sensitivity to fluid disturbances, making the LWQ series flowmeter a particularly good instrument that can accurately measure gas accumulation Commercial trade meter.
The flowmeter is widely used in: urban gas pipeline (network) gas measurement, industrial gas measurement, gas pressure regulation station measurement, energy management and other various non-corrosive gas measurement or flow control and other occasions.
This product has been approved by the quality inspection department of explosion-proof products according to GB3836.1-2010 "Electrical Equipment for Sexual Gas Environment Part 1: General Requirements", GB3836.2-2010 "Electrical Equipment for Sexual Gas Environment Part 2: Explosion-proof Type" "d" "and GB3836.4-2010" Electrical Equipment for Sexual Gas Environment Part 4: Essential ~ Type "i" "passed the standard inspection. The explosion-proof marks are ExdⅡBT4 (flameproof type), ExiaⅡBT4, ExiaⅡCT4 (intrinsically safe). It is suitable for dangerous places 0 and 1 (only intrinsically safe type) containing T1 ～ T2 temperature group gas mixtures of type ⅡA, ⅡB and ⅡC.
2. Main features
Meet the technical requirements of ISO9951 standard, the length of the meter body is 3DN (DN is the diameter of the flowmeter), and subjected to high and low level disturbance tests;
Can detect the temperature, pressure and flow of the measured gas, can perform automatic flow tracking compensation and compression factor correction, and display standard status
Cumulative gas volume (Pb = 101.325KPa, Tb = 293.15K);
Wide flow range (Qmax / Qmin≥20: 1), good repeatability, high accuracy (up to 1.0 level), small pressure loss, and low initial flow;
With five-segment meter coefficient setting and automatic correction function;
Adopt * integrated rectifier (utility model number: ZL 03210043.4), low requirements for front and rear straight pipe sections of the flow meter (previously ≥ 2DN, no requirements downstream);
Built-in pressure and temperature sensors, high performance, compact structure and beautiful appearance (appearance *: ZL 03332262.7);
The pressure and temperature sensors can be diagnosed by themselves and displayed directly on the LCD screen;
A lithium battery can be used continuously for more than 3 to 5 years, and has a two-level alarm output function for battery undervoltage, which is more suitable for supporting the use with the IC card management system;
The intelligent flow totalizer can be positioned at any angle (the rotation angle is 350 °), which makes the reading of the flow meter more convenient and direct under various installation conditions;
Unique time display and real-time data storage function, no matter what the situation, can ensure that the internal data will not be lost, and can be stored for a long time;
The meter has the function of RS-485 communication interface, and is equipped with a powerful and rich data management software system, which can print various automatically generated charts;
The instrument has explosion-proof and protection functions. The explosion-proof marks are ExdⅡBT4, ExiaⅡBT4, ExiaⅡCT4, and the protection level is IP66.
Available upon request
GSM network function, realize low-cost, long-distance wireless data transmission;
The function of setting the pressure and temperature is especially suitable for the medium pressure and relatively stable temperature;
3. Technical performance indicators
3.1 Main Implementation Standards
Implementation of ISO9951 * standard and GB / T18940-2003 * standard;
Meets the prEN 12261 European Community standard;
Implementation of Q / NCS 001-2012 "LWQ Series Gas Intelligent Turbine Flowmeter" enterprise standard;
Implementation of JJG1037-2008 "Turbine Flowmeter" verification procedures.
3.2 accuracy class
All flowmeters have a larger allowable error of ± 1.0% or ± 1.5% respectively within their specific entire flow range, that is, accuracy class 1.0 or 1.5 (when the smaller flow rate is less than 0.2Qmax, in the range of Qmin ～ 0.2Qmax The larger allowable errors are ± 2.0% or ± 3.0%, respectively).
3.3 Conditions of use
Ambient temperature: -30 ℃ ～ + 60 ℃;
Medium temperature: -30 ℃ ～ + 80 ℃;
Atmospheric pressure: 86kPa ～ 106kPa;
Relative humidity: 5% ~ 95%.
3.4 Mechanical performance indicators
3.4.1 The model specifications and basic parameters of the flowmeter are shown in Table 1.
Note: ① The flow range listed in the table is the flow range at the time of factory inspection (the medium is air at normal temperature and pressure, ρ = 1.205kg / m3);
② As the pressure increases, the flow range also expands;
③ S, M, and L respectively represent smaller, medium, and larger flow ranges for the same caliber;
④ Explanation of symbols: ★ —General factory configuration; ☆ —Optional configuration;
⑤ Without special instructions, the products are delivered at level 1.5;
⑥ For other flow ranges, please specify when ordering.
The flowmeter adopts flange connection method. The flange dimensions are in accordance with GB / T 9112-2000 and GB / T 9113-2010 standards. The outline of the flowmeter is shown in Figure 4. The dimensions are listed in Table 2 (this table is the method at PN1.6MPa). Blue size).