| Place of Origin: | China |
|---|---|
| Brand Name: | NUOYINGJIAYE |
| Certification: | Explosion-proof certificate |
| Model Number: | NYLD |
| Minimum Order Quantity: | 1 |
|---|---|
| Price: | $300 to $2000 |
| Packaging Details: | Export standard packing |
| Delivery Time: | 7 work days |
| Payment Terms: | T/T |
| Supply Ability: | 300 pcs/ pre month |
| Nominal Diameter(mm) And Connection Method: | 4,6,10,15,20,25,32,40 (tread Connection) 15,20,25,32,40 (tread And Flange Connection) 50,65,80,100,125,150,200 ( Flange Connection) | Ambient Conditions: | Temperature：－10～＋55℃, Relative Humidity: 5％～90％ Atmosphere Pressure:86～106Kpa |
|---|---|---|---|
| Accuracy Class: | Regular Accuracy ±1%R, ±0.5%R, Highest Accuracy ±0.2% R | Signal Transmission Line: | STVPV 3×0.3 (three Wires), 2×0.3(two Wires) |
| Measurement Range Rate: | 1:10,1:15,1:20 | Instrument Material: | 304 Stainless Steel; 316L Stainless Steel; Etc. |
| Explode-proof Class: | ExdIIBT6 | Protection Class: | IP65 |
| High Light: | High Precision Turbine Flow Meter,Turbine Flow Meter Sensor 1000m,1000m turbine gas meter |
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NYLD Turbine Flowmeter
The NYLD turbine flowmeter (Abbr. TUF) is a main type of Impeller Flowmeters also including the Anemoscope and Water meter. TUF is made up of Sensor and Conversion-Show. The Sensor reacts to the average velocity of fluid with multi-blades rotor so as to speculating the flow value and the accumulative flow value. The velocity (or circles) of rotor can be picked up by the way of mechanism, electromagnetic induction, photoelectricity, before displaying and transmitting the records by reading device.
It is said that America announced the first TUF patent early in 1886. The patent in 1914 recorded that the TUF flow value is relevant to frequency. The first developed TUF in 1938 is applied to measuring the fuel flow in the aircraft. It is eventurelly achieved to use in the industry until the end of the world war two, since it is urgent for the jet engine and liquid jet fuel to demand high accuracy, quick responses flow measurement instrument. Nowadays, it can be extensively used in the fields of oil,chemical,defence,science,measuring, etc..
NYLD series Turbine Flowmeters draw the leading technology integrating with advanced design to produce the new generation of turbine flowmeter with the features of simple structure, light weight, high accuracy, good repeatability, flexible reaction, convenient installation/maintenance/application etc.. It is widely applied to measuring the liquid of which kinematic viscosity is under 5*10-6㎡/s and have no impurify of fibre,grain etc.,and no corrosive interaction with the stainless steel 1Cr18Ni9Ti,2Cr13,and A12O3, and hard alloy in seal pipes. The liquid of kinematic above 5*10-6㎡/s can be measured after real liquid calibration of flowmeter. It can be used in value control, siren when excess, if co-ordination with special display instrument. So it is the ideal instrument of measuring flow value and saving energy.
NYLD Turbine Flowmeter Basic Parameters / Technical Specification
Technical Specification
|
Nominal Diameter(mm) and Connection method |
4,6,10,15,20,25,32,40 (tread connection) 15,20,25,32,40 (tread and flange connection) 50,65,80,100,125,150,200 ( flange connection) |
| Accuracy Class |
Regular accuracy ±1%R, ±0.5%R, Highest accuracy ±0.2% R |
| Measurement Range Rate | 1:10,1:15,1:20 |
| Instrument material | 304 stainless steel; 316L stainless steel; etc. |
| Medium Temperature(℃) | －20 ～ ＋120 ℃ |
| Ambient Conditions |
Temperature:－10～＋55℃, Relative Humidity: 5％～90％ Atmosphere Pressure:86～106Kpa |
| Signal Output |
Sensor: pulse frequency signal, low level≤0.8V high level≥8V. Transmitter: current signal 4～20mA DC two wires |
| Supply Power |
Sensor: +12V DC, +24V DC (option) Transducer: +24V DC Scene display type meter: 3.2V Lithium cell |
| Signal Transmission Line | STVPV 3×0.3 (three wires), 2×0.3(two wires) |
| Transmission Distance | ≤1000m |
| Signal Line Interface | Internal thread M20×1.5 |
| Explode-proof Class | ExdIIBT6 |
| Protection Class | IP65 |
Measurement range and Working pressure for liquid
|
Nominal Diameter (mm) |
Regular Flow rate (m3/h) |
Expanding flow rate (m3/h) |
Regular tolerance pressure(Mpa) |
Special tolerance pressure(Mpa) (flange connection) |
| DN4 | 0.04—0.25 | 0.04—0.4 | 6.3 | 12, 16, 25 |
| DN6 | 0.1—0.6 | 0.06—0.6 | 6.3 | 12, 16, 25 |
| DN10 | 0.2—1.2 | 0.15—1.5 | 6.3 | 12, 16, 25 |
| DN15 | 0.6—6 | 0.4—8 | 6.3, 2.5(flange) | 4.0, 6.3, 12, 16, 25 |
| DN20 | 0.8—8 | 0.45—9 | 6.3, 2.5(flange) | 4.0, 6.3, 12, 16, 25 |
| DN25 | 1—10 | 0.5—10 | 6.3, 2.5(flange) | 4.0, 6.3, 12, 16, 25 |
| DN32 | 1.5—15 | 0.8—15 | 6.3, 2.5(flange) | 4.0, 6.3, 12, 16, 25 |
| DN40 | 2—20 | 1—20 | 6.3, 2.5(flange) | 4.0, 6.3, 12, 16, 25 |
| DN50 | 4—40 | 2—40 | 2.5 | 4.0, 6.3, 12, 16, 25 |
| DN65 | 7—70 | 4—70 | 2.5 | 4.0, 6.3, 12, 16, 25 |
| DN80 | 10—100 | 5—100 | 2.5 | 4.0, 6.3, 12, 16, 25 |
| DN100 | 20—200 | 10—200 | 2.5 | 4.0, 6.3, 12, 16, 25 |
| DN125 | 25—250 | 13—250 | 1.6 | 2.5, 4.0, 6.3, 12, 16 |
| DN150 | 30—300 | 15—300 | 1.6 | 2.5, 4.0, 6.3, 12, 16 |
| DN200 | 80--800 | 40—800 | 1.6 | 2.5, 4.0, 6.3, 12, 16 |
Measurement range and Working pressure for gas
| Model |
Diameter (mm) |
Flow Rate (m3/h) |
Initial Flow Rate (m3/h) |
Tolerance pressure(Mpa) (flange connection) |
| 25A |
25 (1”)
|
0.7—7 | 0.6 | 4.0 Flange or Thread |
| 25B | 1.5—15 | 1.0 | 4.0 Flange or Thread | |
| 25C | 3—30 | 2.0 | 4.0 Flange or Thread | |
| 40A | 40 (1.5”) | 4—40 | 2.5 | 4.0 Flange or Thread |
| 40B | 8—80 | 3 | 4.0 Flange or Thread | |
| 50A | 50 (2”) | 10—100 | 3.5 | 4.0 Flange |
| 50B | 15—150 | 4 | 4.0 Flange | |
| 80 | 80 (3”) | 15—300 | 4 | 1.6 Flange |
| 100 | 100 (4”) | 20—400 | 5 | 1.6 Flange |
| 150 | 150 (6”) | 50—1000 | 8 | 1.6 Flange |
| 200 | 200 (8”) | 100—2000 | 20 | 1.6 Flange |
| 250 | 250 (10”) | 150—3000 | 30 | 1.6 Flange |
| 300 | 300 (12”) | 200—4000 | 40 | 1.6 Flange |
NYLD Turbine Flowmeter Operating Principle
As the measured liquid flows through the sensor, the drived vane begins to turn, which velocity is in direct proportion to average flow one in the pipe. The turn of vane periodically changes the magnetic resistance value of magnetoelastic transducer. Magnetic flux in the magnetic test coil happens to change cyclically with it to produce periodic induced voltage, it is the pulse signal, that will be sent to the display to show after amplified by magnifier.
Flow rate equation of Turbine Flowmeter includes both practical and theoretical one:
- Practical equation:
Qv=f／k
Qm= Qv vρ
Qv refers to volume flow rate, (unit: m3/s)
Qm refers to mass flow rate, (unit ㎏/s)
f : refer to output signal frequency (unit Hz)
k : refer to the Flowmeter factor, (unit P/m3).
The related curve of flowmeter factor and flow rate is in the graph (Diagram: Turbine flowmeter characteristic curve). As your seeing, the factor curve can be divided into two parts of linearity and non-linearity. The linear part accounts for two-thirds of the entire curve which feature is related to the structure, size of sensors, and fluid viscosity. The feature in non-linearity part is influenced by friction force from bearing, the viscosity resistance of liquid. When flow rate is below the lower limit of sensor, the instrument factor are quickly increasing with it. The value of pressure loss and the flow rate are similar to be square relations. If flow rate surpassed the upper limit, pay attention to preventing from cavitation. When the turbine flowmeters have similar structure, their curves have similar feature but have different system errors.
The sensor factor can be worked out by calibration instrument, which may have no consideration of the sensor’s inside fluid mechanism, and can be confirmed by inputed flow rate and outputed pulse signals of frequency. So we can see the sensor as a black box , that is convenient for application. But please note that the conversion factor (or instrument factor) should comply with some conditions which calibration condition is the reference condition . If it deviate from this condition, the factor will happen to change. The changes would be determined in terms of the sensors type, the pipe installation condition,and fluid physical parameters.
- Theoretical flow rate equation:
According moment of momentum theorem can list the equation of motion impeller.
J dw dt =M1-M2-M3-M4
In the formula,
J: impeller inertia moment;
dw dt: rotational acceleration;
M1 : Liquid-driven torque
M2 : Viscous resistance moment
M3 : Bearing friction moment
M4 : Magnetic moment.
When impeller is rotating according to constant velocity, J dw dt =0, and M1=M2+M3+M4. Through the analysis in theory and verification in experiment ,the formula can be deduced that is:
n=Aqv+B- C qv
In the formula,
n: refers to impeller rotational speed;
qv: refers to volume flow rate;
A: the factors related to fluid physical properties ( include density, viscosity etc.), impeller structure parameters (blade angle, impeller diameter, flow channel cross-sectional area etc.);
B: the factors related to top vane gap, and fluid flow velocity distribution;
C: the factor related to friction moment.
The scholars domestic and abroad have put forward to many flow equations in theory, applied to various sensors structures and fluid working conditions. Until now, the hydrodynamic characteristic of turbine instrument ones is still unclear, for it has complicated relationship with fluid physical property, and flow characteristics. For instance, when there appears to swirling and unsymmetry velocity distribution in flow field, the hydrodynamic characteristics are very complicated.
So instrument factors can not be deduced by theoretical formula, can be confirmed by real flow calibration. But theoretical formula has been significant in practice. It can be used in instruction in the design of sensor structure parameter and the forecast ,and assessment of instrument factor changing rule.
NYLD Turbine Flowmeter Feature
- High accuracy (regular accuracy±1%R, ±0.5%R, highest accuracy±0.2% R);
- Good repeatability (short-term one reaches 0.05%--0.2%), priority to be used in trade settlement for its extremely high accuracy in the regular calibration or on-line calibration.
- Pulse frequency signal output is applicable to totality calculation and computer connection with no zero drift and strong anti-interference capacity.
- High frequency (3-4kHz) can be achieved, and has high resolution.
- Wide rangeability: medium or large diameter may reach 1:20,and small diameters are 1:10.
- Compact and light weight structure, convenient installation and maintenance, extensive application ability.
- Application to high pressure measurement with its unnecessary opening hole to be made into high pressure instruments.
- Complete tailored version sensors can be designed to different kinds of types according to users special needs. For instance, low temperature type, high pressure type, sanitary type, etc.
- Insertion type can be made, that is applicable to large normal diameters measurement for its little pressure loss, low price, unnecessary stopping flow to take out it, and convenient installation and maintenance.
NYLD Turbine Flowmeter Category
1.NYLD series can be divided into two categories by function:
- Turbine flow sensor / transmitter
- Intelligent integration Turbine Flowmeter
2.Function illustration:
Turbine flow sensor/ transmitter
This kind of products have no scene display function,only produce signals to transmit output to far distance. The flow signals can be divided into pulse or current (4-20ma) signal. This instrument has low price, high assemble, small size, so can be applicable to match second displayer,PLC,DCS so on computer control system to use.
According to different signal outputs, its can be divided into NYLD-N and NYLD-A types.
NYLD—N sensor
12--24V DC power supply, three wires pulse outputs,
high level≥8V, low level≤0.8V, signal transmission distance≤1000M.
NYLD—A transmitter
24V DC power supply, two wires current (4—20mA) signal output, signal transmission distance≤1000M.
Intelligent integration turbine flowmeter
It adopts an advanced super-low power consumption single-chip microprocessor technology to make up of new intelligent flowmeter with turbine flow sensor and accumulative calculation displayer integration. It has many obvious advantages which are double-row LCD display at the scene, compact structure, direct and clear reading, high reliability, anti-interference from outside power, anti-thunder attack, and low cost ,etc.
It has the instrument factors’ three points rectified, non-linear intelligently compensated, and revision at the scene.
High clear LCD display simultaneously shows both instant flow rate (four valid figures) and accumulative flow rate (eight valid figures, and accumulative flow rate (eight valid figures with reset). All valid data can be kept for ten years. This kind of turbine flowmeters all are explosion-proof products, and the explosion-proof class is ExdIIB6.
This type of turbine flowmeters can be divided into type NYLD—B and NYLD—C in terms of supply power and the remote signal transmitting methods.
NYLD—B type: supply power 3.2V10AH(Lithium battery) can continuously run more than four years, but no signal output.
NYLD—C type: supply power 24V DC outside, output normal two wires current signal (4-20 m A) , and can add RS485 or HART communication according to different scene demand.
NYLD Turbine Flowmeter Type Choice
| Model | Explanation | ||||||||||||
| NYLD- □/ □/ □/ □/ □/ □/ □ | |||||||||||||
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DN (mm)
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4 |
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