Thread Type Turbine Flow Meter Explosion Proof Simple Structure
Easy Installation
1. Introduction
LWGYML series intelligent liquid turbine flow meter is a new type
of intelligent instrument with integrated turbine flow sensor and
display product calculation developed by advanced ultra-low power
single-chip microcomputer technology, which has obvious advantages
such as compact mechanism, clear reading, high reliability,
undisturbed by external power supply, lightning resistance and low
cost.
2. Features
- High accuracy, usually reach ±1%R,±0.5%R,or even reach ±0.2%R for
high-precision type.
- Good repeatability, it can reach 0.05%-0.2% in short term, if
regular calibration or online calibration can get an extremely high
accuracy, so it is preferred in foreign trade.
- Pulse signal output, it is suitable for totalizer measurement and
computer connection, no zero drift,strong capacity of resisting
disturbance.
- High frequency signal(3-4KHz), strong signal resolution.
- Wide range, middle and big diameter can reach 1:20, and small
diameter can reach 1:10.
- Compact structure, easy installation and maintenance.
3. Application
Turbine flow meters are widely used in the following measurement
objects: petroleum, organic liquid, inorganic liquid, liquefied
gas, natural gas, gas and low temperature fluids. In foreign
liquefied petroleum gas, refined oil and light crude oil and other
transshipment and collection stations, large crude oil pipelines
are used in large numbers for trade settlement. In Europe and the
United States, turbine flow meters are second only to the
perforated flow meters of natural gas meters, the Netherlands alone
in the natural gas pipeline using more than 2,600 various sizes,
pressure from 0.8MPa to 6.5MPa gas turbine flow meters, they have
become excellent natural gas flow meters. Although the excellent
measurement characteristics of turbine flow meters are favored by
people, but give the impression that by the moving parts, the use
of short, in the selection of inevitable, after people's
unremitting efforts, it should be said that the situation has
greatly improved. Turbine flow meter as the most common flow meter,
its products have developed into a variety, full range, multi-size
mass production scale.
4. Working Principle
The working principle of turbine flowmeter: the fluid flows through
the sensor housing. Since the blade of impeller has a certain angle
with the flow direction, the blade has rotational torque due to the
impulse of fluid. After overcoming the friction torque and fluid
resistance, the blade rotates. After the moment is balanced, the
speed is proportional to the flow rate. Because the blade has
magnetic conductivity, it is in signal detection In the magnetic
field of the device (composed of permanent magnet steel and coil),
the rotating blade cuts the magnetic line of force and changes the
magnetic flux of the coil periodically, so that the electric pulse
signal is induced at both ends of the coil. The signal is amplified
and shaped by the amplifier to form a continuous rectangular pulse
wave with a certain amplitude, which can be transmitted to the
display instrument to display the instantaneous flow and cumulative
measurement of the fluid.
5. Specifications
Pipeline Diameter(mm)
and
Connection | 4,6,10,15,20,25,32,40
Thread Connection |
(15,20,25,32,40) 50,65,80,100,125,150,200
Flange Connection |
| Accuracy | ±1%R,±0.5%R,±0.2%R(Special Order) |
| Turn Down Ratio | 10:1; 15:1; 20:1 |
| Material | 304SS,316(L)SS, etc |
| Medium Temperature | -20℃~+110℃ |
| Environmental Conditions | Temperature: -10℃~+55℃
Relative humidity: 5%~90%
Atmospheric pressure: 86~106KPa |
| Power supply | Sensor:+12VDC,+24VDC(Option)
Transmitter:+24VDC
Local Display:3.2V Lithium Battery |
| Output Signal | Sensor:Pulse Frequency Signal(Low level≤0.8V, High level≥8V)
Transmitter:Two Wired 4-20mA Current Signal |
| Signal Cable | STVPV 3x0.3(Three Wired),2x0.3(Two Wired) |
| Signal Cable Connection | Houseman Connector(Standard Type)
Inner Thread M20x1.5(Explosion Type) |
| Transmission Distance | ≤1000m |
| Explosion Proof | None(Standard Type)
EXdIIBT6(Explosion Proof) |
| Protection Class | IP65 |
6. Flow Range & Work Pressure
| Pipeline Diameter | Normal Flow Range
(m³/h) | Extended Flow Range
(m³/h) | Normal Pressure
(MPa) | Pressure Rate(MPa)
(Flange Connection) |
| DN4 | 0.04~0.25 | 0.04~0.40 | 6.3 | 12,16,25 |
| DN6 | 0.10~0.60 | 0.06~0.60 | 6.3 | 12,16,25 |
| DN10 | 0.20~1.20 | 0.15~1.50 | 6.3 | 12,16,25 |
| DN15 | 0.60~6.00 | 0.40~8.00 | 6.3,2.5
(Flange Connection) | 4.0,6.3,12,16,25 |
| DN20 | 0.80~8.00 | 0.45~9.00 | 6.3,2.5
(Flange Connection) | 4.0,6.3,12,16,25 |
| DN25 | 1.00~10.00 | 0.50~10.00 | 6.3,2.5
(Flange Connection) | 4.0,6.3,12,16,25 |
| DN32 | 1.50~15.00 | 0.80~15.00 | 6.3,2.5
(Flange Connection) | 4.0,6.3,12,16,25 |
| DN40 | 2.00~20.00 | 1.00~20.00 | 6.3,2.5
(Flange Connection) | 4.0,6.3,12,16,25 |
| DN50 | 4.00~40.00 | 2.00~~40.00 | 2.5 | 4.0,6.3,12,16,25 |
| DN65 | 7.00~70.00 | 4.00~70.00 | 2.5 | 4.0,6.3,12,16,25 |
| DN80 | 10.00~100.00 | 5.00~100.00 | 2.5 | 4.0,6.3,12,16,25 |
| DN100 | 20.00~200.00 | 10.00~200.00 | 1.6 | 4.0,6.3,12,16,25 |
| DN125 | 25.00~250.00 | 13.00~250.00 | 1.6 | 2.5,4.0,6.3,12,16 |
| DN150 | 30.00~300.00 | 15.00~300.00 | 1.6 | 2.5,4.0,6.3,12,16 |
| DN200 | 80.00~800.00 | 40.00~800.00 | 1.6 | 2.5,4.0,6.3,12,16 |
7. Installation Dimension
According to the diameter, choose thread or flange connection to
install the senor. As to installation method, please check Pic4,
Pic5, Pic6.
Pic4 LWGYML-4~10 Structure & Installation Dimension Diagram
Pic5 LWGYML-15~40 Structure & Installation Dimension Diagram
Pic6 LWGYML-50~200 Structure & Installation Dimension Diagram
| Pipeline Diameter | L | Thread Connection | Flange Connection |
| (mm) | G | D
(mm) | d
(mm) | n |
| DN4 | 295 | G1/2 | | | |
| DN6 | 330 | G1/2 | | | |
| DN10 | 450 | G1/2 | | | |
| DN15 | 75 | G1 | θ65 | θ14 | 4 |
| DN20 | 80 | G1 | θ75 | θ14 | 4 |
| DN25 | 100 | G1-1/4 | θ85 | θ14 | 4 |
| DN32 | 120 | G2 | θ100 | θ14 | 4 |
| DN40 | 140 | G2 | θ110 | θ18 | 4 |
| DN50 | 150 | | θ125 | θ18 | 4 |
| DN65 | 170 | | θ145 | θ18 | 4 |
| DN80 | 200 | | θ160 | θ18 | 8 |
| DN100 | 220 | | θ180 | θ18 | 8 |
| DN125 | 250 | | θ210 | θ25 | 8 |
| DN150 | 300 | | θ250 | θ25 | 8 |
| DN200 | 360 | | θ295 | θ25 | 12 |
8. Configuration
| LWGYML Series Turbine Flow Meter Configuration |
| Model | LWGYML |
| Pipe Material | 4 | 4mm |
| 6 | 6mm |
| 10 | 10mm |
| ...... | |
| 200 | 200mm |
| Model Description | N | No Display,12VDC Power Supply,Pulse Output, High Level≥8V Low
Level≤0.8V |
| A | No Display,4-20mA 2 Wired Current Output |
| B | Local Display,Battery Operated |
| C | Local Display,4-20mA 2 Wired Current Output |
| C1 | Local Display,RS485 Output |
| C2 | Local Display, HART Output |
| Accuracy | 05 | 0.5 Grade |
| 10 | 1.0 Grade |
| Turbine Type | W | Extended Ratio |
| S | Standard Ratio |
| Material | S | SS 304 |
| I | SS 316(L) |
| Explosion Proof | N | None |
| E | Explosion Type(ExmIICT6 or ExdIIBT6) |
| Pressure Rate | N | Normal Pressure |
| H | High Pressure |
| Connection Type | T | Thread Connection |
| F | Flange Connection |
| Filter | N | None |
| F | With Filter |
9. Details
