Turbine flowmeter (flange connection)-Fornitore globale

1、 Overview of liquid turbine flowmeter:
TM-LWGY turbine flowmeterIt is composed of a turbine flow sensor and a display head, and is one of the ideal flow meters for liquid flow measurement.It has the characteristics of simple structure, high precision, and easy installation, maintenance, and use.Widely used in petroleum, chemical, metallurgical, water supply, papermaking, environmental protection, food and other fields, suitable for measuring stainless steel in closed pipelines1Cr18Ni9Ti、2Cr13And corundumAl2O3Hard alloy is a liquid that does not corrode and has no impurities such as fibers or particles. If used in conjunction with display instruments with special functions, it can be used for automatic quantitative control, over limit alarm, and other purposes.

2、 Characteristics of liquid turbine flowmeter:
1The pressure loss is small, and the impeller has anti-corrosion function.
2Has high resistance to electromagnetic interference and vibration, reliable performance, and long working life.
3Adopting advanced ultra-low power single-chip microcomputer technology, the whole machine has strong functions, low power consumption, and superior performance. Intelligent flow display with non-linear accuracy compensation function. The accuracy of the correction formula is better than0.02%.
4The instrument coefficient can be set online by pressing the button and can be displayed on the screenLCDOn the screen,LCDThe screen is intuitive, clear, and highly reliable.
5The intelligent turbine flowmeter adoptsEEPROMProvide power-off protection for accumulated flow and instrument coefficients. Protection time greater than10Year.

High precision, generally up to ± 1% R, ± 0.5% R, and high-precision models up to ± 0.2% R;

·Good repeatability, short-term repeatability can reach 0.05%~0.2%, precisely due to its good repeatability, such as regular calibration or online calibration can be obtained

High precision flow meters are preferred for trade settlement;

·Output pulse frequency signal, suitable for total measurement and computer connection, no zero drift, strong anti-interference ability;

·Can obtain high frequency signals (3-4kHz) with strong signal resolution;

·Wide range, with a medium to large caliber of up to 1:20 and a small caliber of 1:10;

·Compact and lightweight structure, easy installation and maintenance, and high circulation capacity;

·Suitable for high voltage measurement, there is no need to open holes on the instrument body, making it easy to make high voltage instruments;

·There are various types of specialized sensors that can be designed according to the specific needs of users, such as low-temperature, bidirectional, and downhole sensors

Type, sand mixing special type, etc;

·Can be made into an insertion type, suitable for measuring large diameters, with low pressure loss, low price, can be removed without interruption, and easy installation and maintenance.

3、 Working principle of liquid turbine flowmeter:
Liquid turbine flowmeterThe fluid flows through the sensor housing, and due to the angle between the blades of the impeller and the flow direction, the impulse of the fluid causes the blades to have a rotational torque. After overcoming the friction torque and fluid resistance, the blades rotate. After the torque is balanced, the speed is stable. Under certain conditions, the speed is proportional to the flow rate. Due to the magnetic conductivity of the blades, they are in the magnetic field of the signal detector (composed of permanent magnet and coil). The rotating blades cut the magnetic field lines and periodically change the magnetic flux of the coil, causing electrical pulse signals to be induced at both ends of the coil. This signal is amplified and shaped by the amplifier, forming a continuous rectangular pulse wave with a certain amplitude, which can be transmitted to the display instrument remotely to display the instantaneous flow rate and cumulative flow rate of the fluid.

4、 Technical performance of liquid turbine flowmeter:
1.Nominal diameter: （4～200）mmBasic parameters are shown in Table 1;
2.Medium temperature: （-20～80）℃ （-20～120）℃；
3.Environmental temperature: （-20～55）℃；
4.accurate true Degree:±0.2%、±0.5%、±1％；
5.Detector signal transmission line system: three wire voltage pulse (three core shielded cable);
6.Power supply: Voltage:12V±0.144V,electric current:≤10mA；
7.Output voltage amplitude: high level≥8V, low level≤0.8V；
8.Transmission distance: The distance from the sensor to the display instrument can reach500Rice;
9.On site display power supply:3VPowered by lithium batteries, it can be used continuously3Year);
10.Display mode: On site LCD displays 6-digit instantaneous flow and 8-bit cumulative flow;
11.On site display with signal output power supply:24V；4～20mATwo wire current output, long-distance transmission1000Rice.

5、 Selection Table for Liquid Turbine Flowmeters:

TM	LWGY□	□□□	□	□	□	Explanation
class type	LWGYA					Flow sensor, pulse output three wire system+ 12V power supply;
	LWGYB					On site display type 3V battery power supply;
	LWGYC					On site display with 4-20mA, two-wire current output+ 24V power supply;
	LWGYD					Transmitter; 4-20mA output current output+ 24V power supply;
state-owned call open up or clear out by poking or jabbing footpath		4				Normal flow range m³/h	0.04～0.25	Expand traffic range m³/h	0.04～0.4
		6					0.1～0.6		0.06～0.6
		10					0.2～1.2		0.15～1.5
		15					0.6～6		0.4～8
		20					0.8～8		0.45～9
		25					1~10		0.5～10
		32					1.5～15		0.75～15
		40					2~20		1～20
		50					4~40		2～40
		65					7~70		3.5～70
		80					10~100		5～100
		100					20~200		10～200
		125					25~250		12.5～250
		150					30~300		15～300
		200					80~800		40～800
explosion-proof						Unmarked, non explosion proof type
explosion-proof			B			Explosion proof type
accuracy class				A		Accuracy level 0.2
				B		Accuracy level 0.5
				C		Accuracy level 1.0
Turbine type					A	Normal flow range
Turbine type					B	Expand traffic range
explain: Sensors with diameters ranging from DN4 to DN40 are threaded connections, equipped with front and rear straight pipe sections and filters, with a maximum pressure of 6.3 Mpa. Sensors with diameters ranging from DN50 to DN200 are connected via flanges, with a maximum pressure of 2.5Mpa. DN15~DN40 pipe diameter can be equipped with front and rear straight pipe sections or flexible joints, and the materials are divided into carbon steel and stainless steel. If flange connection is required for DN15~DN40 pipe diameter, please specify when ordering. ★ High voltage type and special requirements should be specified when ordering.

6、 Installation requirements for liquid turbine flowmeter:

1. The instrument installation adopts flange connection, threaded connection and clamping type;

2. The direction of liquid flow during installation should be consistent with the direction indicated by the arrow on the sensor housing, and the upstream straight pipe section should be ≥ 20dn, and the downstream straight pipe section should be ≥ 5dn (dn is the inner diameter of the pipeline).

3. Sensors should be kept away from external magnetic fields. If unavoidable, necessary measures should be taken;

4. In order to avoid affecting the normal transportation of liquids during maintenance, bypass pipelines should be installed outside the straight pipe sections at both ends of the sensor (as shown in Figure 4);

5. When installing sensors outdoors, please ensure that the amplifier plug is waterproofed;

6. The wiring of sensors and display instruments should be selected according to the power supply of the amplifier. Please refer to the relevant "User Manual" for details.

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