pharmaceutical productionPurified water flow meter
1、 Overview
The LWGY series turbine flow sensor (hereinafter referred to as the sensor) is based on the principle of torque balance and belongs to the speed type flow instrument. Sensors have the characteristics of simple structure, lightweight, high accuracy, good repeatability, sensitive response, easy installation, maintenance and use, and are widely used
Widely used in industries such as petroleum, chemical, metallurgy, water supply, and papermaking, it is an ideal instrument for flow measurement and energy conservation. Sensors are used in conjunction with display instruments and are suitable for measuring liquids in closed pipelines that do not corrode stainless steel 1Cr18Ni9Ti, 2Cr13, and corundum Al O alloys, and are free of impurities such as fibers and particles. If compared to displays with special functions
Equipped with instruments, it can also perform quantitative control, over limit alarm, etc. Choosing this product
Explosion proof type (ExmIIT6), can be used in environments with explosive hazards.

Sensors are suitable for media with viscosity less than 5 × 10 m/s at operating temperature,
-6
2
For liquids with viscosity greater than 5 × 10 m/s, the sensor needs to be calibrated with real liquid before use
use.
If the user needs a special form of sensor, they can negotiate to place an order and require explosion-proof transmission
Please specify the sensor in the order.
2、 LWGY basic turbine flow sensor
1. Structural features and working principle
1




(1) Structural features
The sensor is a hard alloy bearing thrust type, which not only ensures accuracy and improves wear resistance, but also has the characteristics of simple structure, firmness, and easy disassembly and assembly.
(2) Working principle
The fluid flows through the sensor housing. 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 stabilizes. Under certain conditions,
The rotational speed is proportional to the flow velocity. Due to the magnetic conductivity of the blades, they are located in the magnetic field of the signal detector (composed of permanent magnet and coil). The rotating blades cut the magnetic field lines, periodically changing the magnetic flux of the coil, thereby inducing electrical pulse signals at both ends of the coil. This signal is amplified and shaped by an amplifier to form a continuous rectangular pulse wave with a certain amplitude, which can be transmitted to a display instrument to display the instantaneous flow rate or total amount of the fluid. Within a certain flow range, the pulse frequency f is related to the fluid flowing through the sensor
The instantaneous flow rate Q is proportional, and the flow equation is:
Q  3600 f
k
In the formula:
F - Pulse frequency [Hz]
3
K - the instrument coefficient of the sensor [1/m], given by the calibration sheet.
3
Q - Instantaneous flow rate of fluid (under working conditions) [m/h]
2




3600- conversion factor per second
The instrument coefficient of each sensor is filled in the calibration certificate by the manufacturer, with a value of k
By installing it into the accompanying display instrument, the instantaneous flow rate and cumulative total amount can be displayed.

Pharmaceutical purified water flowmeterProduct Features
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%. It is precisely because of its good repeatability that frequent calibration or online calibration can achieve extremely high accuracy, making it a preferred flowmeter in trade settlement;
Turbine flowmeter outputs pulse frequency signals, suitable for total measurement and connection with computers, with no zero drift and strong anti-interference ability;
Turbine flowmeter can obtain high frequency signals (3-4kHz) with strong signal resolution;
The turbine flowmeter has a wide range, with a medium to large diameter of up to 1:20 and a small diameter of 1:10;
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, downhole, sand mixing, etc;
The turbine flowmeter can be made into an insert type, suitable for measuring large diameters, with low pressure loss, low price, can be removed without interruption, and easy installation and maintenance.
Pharmaceutical purified water flowmeterProduct Features
The international standard for turbine flow meters can replace similar imported products;
Anti corrosion and anti rust material, suitable for the hygiene industry;
Quick installation structure, easy to install and maintain;
The turbine flowmeter has high accuracy and good repeatability;
High quality turbine flowmeter, beyond the conventional range;


Measurement range and working pressure of turbine flowmeter

Instrument caliber （mm）	Normal flow range （m3/h）	Expand traffic range （m3/h）	Conventional stress tolerance （MPa）
DN 4	0.04～0.25	0.04～0.4	1.0
DN 6	0.1～0.6	0.06～0.6	1.0
DN 10	0.2～1.2	0.15～1.5	1.0
DN 15	0.6～6	0.4～8	1.0
DN 20	0.8～8	0.45～9	1.0
DN 25	1~10	0.5～10	1.0
DN 32	1.5～15	0.8～15	1.0
DN 40	2~20	1~20	1.0
DN 50	4~40	2~40	1.0

Pharmaceutical purified water flowmeterapplication
Pharmaceutical industry: filling and metering of infusion products such as glucose water;
Food and beverage industry: filling and measuring of liquid foods such as vegetable juice, fruit juice, beer, and finished oil.

Quick fitting clamp type sanitary turbine flowmeter
Quick installation (clamp type) is easy to install (disassemble), convenient for maintenance, and easy to clean. The body part is made of SUS316L material; The impeller is made of SUS329J1 duplex stainless steel material and can be disinfected by steam.
Turbine flowmeter is the most practical instrument for measuring liquid flow rate It has high accuracy, good stability, and is easy to use. It has the lowest price among all smart flow meters, so it is widely used in flow measurement in various industries.




1. Basic parameters of turbine flowmeter:

Instrument caliber	4. 6, 10, 15, 20, 25, 32, 40, 50
Accuracy level	± 1% R, ± 0.5% R, ± 0.2% R (to be customized)
Range ratio	1:10；1:15；1:20
Instrument material	316 (L) stainless steel
Temperature of the tested medium (℃)	-20～＋120℃
Environmental conditions	Temperature -10~+55 ℃, relative humidity 5%~90%, atmospheric pressure 86~106Kpa
Output signal	Sensor: Pulse frequency signal, low level ≤ 0.8V, high level ≥ 8V Transmitter: two-wire 4-20mADC current signal
Power supply for turbine flowmeter	Sensor:+ 12VDC+ 24VDC (optional) Transmitter:+ 24VDC On site display type: The instrument comes with a 3.2V lithium battery
Signal transmission line	STVPV3 × 0.3 (three wire system), 2 × 0.3 (two wire system)
Transmission distance	≤1000m
Signal line interface	Basic type: Hausman connector or self-contained three core cable; Explosion proof type: Internal thread M20 × 1.5
Explosion proof grade	Basic type: non explosion proof product; Explosion proof type: ExdIIBT6
Protection level	IP65

JKM-LWS series antifreeze flowmeter selection table:

Model number						Explanation of Turbine Flow Meter
-LWS	□	/□	/□	/□	/□
state-owned call open up or clear out by poking or jabbing footpath	4					4 mm
	6					6 mm
	10					10 mm
	15					15 mm
	20					20 mm
	25					25 mm
	32					32 mm
	40					40 mm
	50					50 mm
Type		N				Sensor type:+ 12V or 24V power supply, output three wire pulse signal
		A				Transmitter type:+ 24V power supply, output two-wire 4-20mA
		B				Intelligent type: Powered by lithium batteries, no signal output displayed on site
		C				Intelligent type:+ 24V power supply, on-site display and output of two-wire 4-20mA
		C1				Intelligent type:+ 24V power supply, on-site display with RS485 communication protocol
		C2				Intelligent type:+ 24V power supply, on-site display with HART communication protocol
Accuracy level of turbine flowmeter			05			Level 0.5
			10			Level 1.0
			02			0.2 level (negotiated ordering, longer production cycle)
Turbine Type				W		Expand measurement range
				S		Standard measurement range
Explosion proof					N	Non explosion proof type
					E	Explosion proof type, Exd Ⅱ BT6
The turbine flowmeter flow sensor consists of a main body, front support, turbine, preamplifier, rear support, guide vane, bearings, etc. The preamplifier is equipped with permanent magnets, induction coils, and amplification units. When the measured fluid passes through the flowmeter, it drives the turbine to rotate, and the turbine periodically changes the magnetic resistance value of the magnetic circuit, causing the magnetic flux passing through the coil to undergo periodic changes. This induces a pulsating electrical signal in the coil, which is amplified and processed before being transmitted to the secondary instrument or displayed on site to achieve flow accumulation. The turbine flowmeter is within the measurement range, and the speed of the impeller is proportional to the instantaneous flow rate, that is, the total pulse amount is proportional to the cumulative flow rate. The ratio of the two is called the instrument constant, expressed in "K" (times/L). Obtain the instrument constant values of each flowmeter through real flow calibration. The instantaneous flow rate q (L/s) and cumulative flow rate Q (L) can be obtained by dividing the pulse frequency f and total number of pulses N measured by the flowmeter by the instrument constant K of the flowmeter. Namely: q = ƒ/K (L /s ) Q = N/K （L） C、 Main technical parameters Medium viscosity range: ≤ 50mPɑ·S Fluid temperature range: -20~+100 ℃, high temperature type -20~+150 ℃ Environmental temperature:- 25～55℃ Environmental humidity: ≤ 80% RH (non condensing) Turbine flowmeter power supply voltage: preamplifier 24VDC (can drive PLC)