vortex shedding flowmeters for cooling water flow measurement Pipe size DN15-300
General introduction
The vortex shedding flow meter: when a fluid passes by an object or obstruction, oscillations can occur. Examples of these oscillations in nature include the whistling caused by wind blowing by the branches of trees, the swirls produced downstream of a rock in a rapidly flowing river, and the waving of a flag in the wind. Note that in all of these examples, when the flow is slowed, the oscillations stop. That is, the whistling stops when the wind dies down, the water flows calmly around the rock when the river is not flowing rapidly, and the flag does not wave in a mild breeze.
Features
- Less pressure loss, as less as 1 Kpa
- Accuracy 1%, and customizable to 0.5%
- Low flow rate measurable 1.5 m/s
- Temperature and pressure compensation
- GRW self lubricate bearing, or add lubrication oil
- Output: Pulse, 4-20 mA
- Diameter: 15, 25, 40, 50, 80, 100, 150, 200, 250, 300mm
- Backlit LCD display, compact or remote design
- Communication (optional): RS485
- Combined converter with top and bottom limit alarm, equivilent output
Turbine blade option
Technical data
| Diameter | Flow range | Temp. | Ambient Temp. | RH | Pressure | Pressure loss |
| mm | +/- 1% | +/- 1.5% | +/- 2.5% | ℃ | ℃ | - | Mpa | KPa |
| LWGQ15 | - | - | 1.5 ~ 7.5 | -20 ~ 60 | -20 ~ 50 | ≤95% | 6.4 | 1 |
| LWGQ25 | - | - | 6 ~ 42 | 1 1.6 2.5 |
| LWGQ40 | 8.4 ~84 | 8.4 ~160 | 6.5 ~200 |
| LWGQ50 | 16.8 ~168 | 16.8 ~336 | 11 ~336 |
| LWGQ80 | 34 ~340 | 34 ~680 | 34 ~1000 |
| LWGQ100 | 51 ~510 | 51 ~1020 | 51 ~1850 |
| LWGQ150 | 98 ~980 | 98 ~1960 | 130 ~3000 |
| LWGQ200 | 170 ~1700 | 170 ~2550 | 140 ~4000 |
| LWGQ250 | 200 ~2000 | 200 ~3450 | 200 ~6000 |
| LWGQ300 | 400 ~4000 | 400 ~6000 | 250 ~7500 |
Model selection
Calculation logic of gas work flow and standard cubic flow converting
Formula: pV=nRT
P-pressure, V-measurement, n-material weight, R-constant, T-absolute temperature
Under ideal gas status, unit: pa (pressure), m3, mol,k, R=8.31
It’s actually to convert work flow into standard cubic flow at 20 C, 101.325kpa.
For example, work temp. T=32C, work pressure:P= 0.6 Mpa, work flow Qw=100 m3/h, the standard flow Qs:
Qs=100 * (701325*273) / (101325*305)=619.5345 m3/h
Applications:
For air, natural gas, coal gas flow metering volumetric measurement in petroleum, chemical processing, metallurgy. Combined with our accumulator, it can measure the gas / air cubic flow or weight flow.
Competitive advantage:
- well education background staff
- wide field application experience, include but not limit to: oil field, petroleum, chemical process, environment protection, power grid, metellurgy, machinery, textile, etc
- complete manufacturing qualifications in flow instrument
Lab equipment - Piston pressure regulator
Lab equipment - static flow calibrating line
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Horizontal 25mm Vortex Flow Meter For Cooling Water Less Pressure Loss Images
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