China DN100 Turbine Flowmeter Measure Liquid Gas Turbine Flow Meter
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. Application
Turbine flowmeter is widely used in the following measurement
objects: petroleum, organic liquid, inorganic liquid, liquefied
gas, natural gas, coal gas and cryogenic fluid. In foreign
countries, liquefied petroleum gas, refined oil and light crude oil
are used for trade settlement in the first and last stations of
large crude oil pipelines. In Europe and the United States, turbine
flowmeter is second only to orifice flowmeter, while in the
Netherlands alone, more than 2,600 turbine flowmeters with various
sizes and pressures ranging from 0.8MPa to 6.5MPa have been used in
natural gas pipelines, and they have become excellent natural gas
flowmeters. Although the excellent metering characteristics of
turbine flowmeter are favored by people, it gives people the
impression that it is made up of moving parts and has a short
service life, so it is inevitable to hesitate when choosing them.
After people's unremitting efforts, it should be said that the
situation has changed greatly. As the most universal flowmeter, the
turbine flowmeter has developed into a mass production scale with
multiple varieties, full series and multiple specifications.
Turbine flowmeter is widely used in some special departments
besides the aforementioned industrial departments, such as
scientific research and experiment, national defense science and
technology, and metering departments. The use of these fields just
avoids its weakness (not suitable for long-term continuous use) and
gives full play to its characteristics (high precision, good
repeatability, and can be used in high pressure, high temperature,
low temperature and micro-flow conditions). In these fields, most
of them are designed according to the special requirements of the
measured objects, and they are special instruments without mass
production.
3.Turbine flow meter Advantages and Disadvantages
Turbine Meter Advantages
- The cost is moderate.
- Very good at clean, low viscosity fluids of moderate velocity and a
steady rate.
- Turndown is very good as it can read very low compared to the
greatest flow.
- They are reliable if put in a clean fluid especially if it has some
lubricity.
- AGA and API approved for custody transfers.
- They do cause some pressure drop where that may be a factor such as
gravity flows.
- High accuracy. Among all flowmeters, it is the most accurate
flowmeter.
- No zero drift, good anti-interference ability.
- High accuracy. Among all flowmeters, it is the most accurate
flowmeter.
- No zero drift, good anti-interference ability.
Turbine Meter Disadvantages
- Not reliable for steam.
- Bearings wear out.
- Requires constant backpressure to prevent cavitation.
- Accuracy adversely affected by bubbles in liquids.
- Turbine meters can be used with clean liquids and gases only (may
need to install a strainer upstream to prevent damage from
particulates).
- Not applicable for measuring corrosive fluids.
- May not function properly with high viscosity fluids where the flow
profile is laminar.
- Cannot maintain calibration characteristics for a long time.
4. 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 |
5. 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 |
6. Details
