Pulse signal gas turbine flowmeter

1、 Overview of Pulse Signal Gas Turbine Flow Meter
The pulse signal gas turbine flowmeter is a new generation of high-precision and high reliability gas precision measuring instrument that integrates temperature, pressure, flow sensors, and intelligent flow integrator, which has been independently developed by absorbing advanced flow instrument technology optimization design at home and abroad, and integrating gas mechanics, fluid mechanics, electromagnetics and other theories. It has excellent low-pressure and high-pressure measuring performance and is widely applicable to the measurement of natural gas, coal to gas, liquefied gas, light hydrocarbon gas and other gases.
2、 Characteristics of pulse signal gas turbine flowmeter
Adopting a new type of sensor, it has low starting flow rate, small pressure loss, good anti vibration and anti pulsating flow performance, is not easy to corrode, has good reliability, and has a long service life.
Adopting a new type of microprocessor and high-performance integrated chips, it has high computational accuracy, powerful overall functions, and superior performance.
Adopting advanced low-power high-tech, the whole machine has low power consumption.
According to the flow frequency signal, the instrument coefficient can be automatically linearly corrected in eight segments, which can improve the calculation accuracy of the instrument according to user needs.
Easy to install and use.
High precision, generally up to ± 1.5% R and ± 1.0% R.
Good repeatability, short-term repeatability can reach 0.05% to 0.2%. It is precisely because of its good repeatability that flow meters are preferred in trade settlement.
3、 Main parameters of pulse signal gas turbine flowmeter

Execution standards	Measurement of Gas Flow in Closed Pipelines - Gas Turbine Flowmeters (GB/T8940-2003)
Instrument diameter (mm) and connection method	20. 25, 32, 40, 50, 65, 80, 100, 125, 150, 200, 250, 300 are connected by flanges 25, 40, and 50 can be connected using threaded connections
Accuracy level	± 1.5% R (± 1% R needs to be customized)*
Range ratio	1:10 ； 1:20 ； 1:30
Instrument material	Table body: 304 stainless steel or cast aluminum Impeller: anti-corrosion ABS or high-quality aluminum alloy Converter: Cast aluminum
Usage conditions	Medium temperature:- 20℃～+80℃ Environmental temperature:- 30℃～+60℃ Relative humidity: 5% to 90% Atmospheric pressure: 86Kpa to 106Kpa
Working power supply	External power supply:+ 24VDC ± 15%, ripple ≤ ± 5%, suitable for pulse output, RS485, etc
Whole machine energy consumption	External power supply:<> Internal power supply: average power consumption ≤ 1W, can be used continuously for more than three years.
Signal output function	Pulse signal
Communication output function	RS485 communication
Signal wiring port	Internal thread M20 × 1.5 or other
Explosion proof grade	Exd Ⅱ BT6 or Exia Ⅱ CT4
Protection level	IP65

4、 Measurement range of pulse signal gas turbine flowmeter

Nominal Diameter （mm）	model	Standard range （m³/h)		Expand range （m³/h）		Conventional voltage withstand level （Mpa）	Specially designed high voltage level （Mpa）	Installation method
DN20	LWQ－20	A	2.2-25	B	4-40	1.6	2.5,4.0	flange
DN25	LWQ－25	A	2.2-25	B	4-40	1.6	2.5,4.0	Flange (thread)
DN32	LWQ－32	A	5-50	B	6-60	1.6	2.5,4.0	flange
DN40	LWQ－40	A	5-50	B	6-60	1.6	2.5,4.0	Flange (thread)
DN50	LWQ－50	A1	6-65	B1	5-70	1.6	2.5,4.0	flange
	LWQ－50	A2	10-100	B2	8-100
DN65	LWQ－65	A	15-200	B	10-200	1.6	2.5,4.0	flange
DN80	LWQ－80	A1	13-250	B	10-160	1.6	2.5,4.0	flange
	LWQ－80	A2	20-400					flange
DN100	LWQ－100	A1	20-400	B	13-250	1.6	2.5	flange
	LWQ－100	A2	32-650					flange
DN125	LWQ－125	1	25-700	B	20-800	1.6	2.5	flange
DN150	LWQ－150	A1	32-650	B	80-1600	1.6	2.5	flange
	LWQ－150	A2	50-1000					flange
DN200	LWQ－200	A1	80-1600	B	50-1000	1.6	______	flange
	LWQ－200	A2	130-2500					flange
DN250	LWQ－250	A1	130-2500	B	80-1600	1.6	______	flange
	LWQ－250	A2	200-4000					flange
DN300	LWQ－300	1	200-4000	B1	130-2500	1.6	______	flange
				B2	320-6500	1.6

5、 Selection of Pulse Signal Gas Turbine Flow Meter

Instrument model	LWQ-N
signal output	pulse
power supply	+24VDC±15%
accuracy class	Level 2.5-1.5
measuring range	Standard range
monitor	not have
temperature and pressure compensation	not have
communication interface	not have
Real time recording	not have
Instrument material	Aluminum alloy or stainless steel
Explosion proof grade	ExdIIBT6 or ExiaICIT4
protection grade	IP65
Overall Power Consumption	<>
Instrument communication	DN25～DN300
Installation method	flange mounting
medium temperature	-20℃～80℃
ambient temperature	-30℃～60℃