SUP-LWGY Turbine flowmeter flange connection
SAV-LWGY series liquid turbine flowmeter is a kind of speed instrument, which has the advantages of high accuracy, good repeatability, simple structure, slight pressure loss and convenient maintenance. It measures the volume flow of low-viscosity liquid in a closed pipe. In the petroleum, chemical, metallurgy, water supply, paper and other industries with a wide range of applications.
Features
Pipe diameter: DN4~DN200
Accuracy: 0.5%R, 1.0%R
Power supply: 3.6V lithium battery; 12VDC; 24VDC
Ingress protection: IP65
Introduction
SAV-LWGY series liquid turbine flowmeter is a kind of speed instrument with high accuracy, good repeatability, simple structure, small pressure loss and convenient maintenance. It measures the volume flow of low-viscosity liquid in a closed pipe.
SPECIFICATIONS
| Product | Turbine flowmeter |
|---|---|
| Model | SUP-LWGY |
| Diameter Nominal | DN4~DN200 |
| Nominal Pressure | 1.0MPa~6.3MPa |
| Accuracy | 0.5%R, 1.0%R |
| Medium viscosity | Less than 5×10-6m2/s |
| (for the liquid with >5×10-6m2/s, | |
| the flowermeter needs to be calibrated before using) | |
| Medium Temperature | -20℃～＋120℃ |
| Power Supply | 3.6V lithium battery; 12VDC; 24VDC |
| Output Signal | Pulse, 4-20mA, RS485 Modbus |
| Ingress protection | IP65 |
- Measuring principle
A fluid flowing with a certain velocity and passing a fixed obstruction generates vortices. The generation of vortices is known as Karman’s Vortices.The frequency of vortex shedding is a direct linear function of fluid velocity and frequency depends upon the shape and face width of the bluff body.
Since the width of the obstruction and inner diameter of the pipe will be more or less constant, the frequency is given by the expression:
f=StV/d
In the formula:
f – Karman vortex frequency generated at one side of bluff body (Hz)
St – strouhal number (non-dimensional number)
V – average speed of fluid (m/s)
d – width of bluff body (m)