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Introduction

Principle & Structure

Turbine flowmeters are a type of velocity flowmeter. A turbine is placed in the center of the pipeline, and the two ends are supported by bearings. When the fluid passes through the pipeline, it impacts the turbine blades and generates a driving torque for the turbine, so that the turbine can overcome the friction torque and fluid resistance torque to generate rotation. Within a certain flow range, for a certain viscosity of the fluid medium, the rotational angular velocity of the turbine is proportional to the fluid flow rate. Therefore, the fluid flow rate can be obtained from the rotational angular velocity of the turbine, so that the fluid flow through the pipeline can be calculated. The rotational speed of the turbine is detected by a sensor coil mounted outside the casing. When the turbine blade cuts through the magnetic field lines created by the permanent magnet steel in the casing, it causes a change in the magnetic flux in the sensing coil. The sensing coil sends the detected magnetic flux periodic change signal to the preamplifier, amplifies and shapes the signal, generates a pulse signal proportional to the flow rate, and sends it to the unit conversion and flow accumulation circuit to obtain and display the cumulative flow value; At the same time, the pulse signal is also sent to the frequency-current conversion circuit, and the pulse signal is converted into an analog current, thereby indicating the instantaneous flow value.

Features

Excellent repeatability for dosing

Excellent low flow measurement performance

Very fast response, suitable for batch control and proportioning control occasions

Rotor with multi-blade structure, high precision

Steam cleaning allowed

Compact type suitable for equipment installation

application

Refined oil, light crude oil, gasoline, light oil, jet fuel, light diesel oil, naphtha, ethylene, etc.

Lubricating oil, hydraulic oil, etc.

Water, pure water, distilled water, deionized water, desalinated water, demineralized water, etc.

Alcohol, benzene, toluene, xylene, butadiene, carbon tetrachloride, methylamine, acrylonitrile, etc.

Formaldehyde, acetic acid, caustic soda, carbon disulfide, etc.

milk, coffee, etc.

Heat transfer oil, hot kerosene and other high temperature media

technical parameter

Accuracy:0.5% of rate and 0.25% of rate
Repeatability:±0.1% of measured value
Response time:50 ms max relative to input change
stability:Stability over 6 months is ±0.1% of measured value
Influence of ambient temperature:Over the operating temperature range is ±0.25% of the measured value
Influence of installation location:It is necessary to ensure that the sensor is full of pipes and to ensure that there are enough straight pipe sections before and after, then the installation has no effect
Start Time:50ms from zero traffic
Preheat time:5 minutes from power-on to rated measurement accuracy
Sensor parameters
size:DN4 to DN250
Measured fluid temperature range:-40 to 120°C, (>120°C and ≤180°C customized type can be contacted by sales engineer)
Sensor body material:Stainless steel 1.4301 (304), stainless steel 1.4435 (316L)
Impeller and accessories material:430F stainless steel, stainless steel 1.4435 (316L)
Pressure rating:PN10 to PN63
Coil Impedance:1600Ω
Junction box parameters
Ambient temperature range:-20 to 140° F (-29 to 60 ℃ )
Junction box material:Stainless steel 1.4301 (304), IEC60529 IP66 (standard), can be customized stainless steel 1.4435 (316L)
Converter seal:O-ring rubber seal
power supply:DC 12V to 30V, 1A fast fuse fuse;
Protection class:P65&IP67
Electrical Interface:PG13.5
power:max 0.3 W
output:Pulse output (for total)

Selection table

FR55-Turbine flowmeter

The way to

DN4 DN6 DN10 DN15 DN20 DN25 DN32 DN40 DN50 DN65 DN80 DN100 DN125 DN150 DN200 DN250

output signal

pulse

Process connection type

Threaded seal connection 

Flange connection

Sanitary clamp connection

precision

Accuracy 0.25% (applicable to pipelines above DN15)

Accuracy 0.5% (applicable to pipelines above DN10)

Accuracy 1.0% 

Wiring

Cast aluminum junction box IP65

Cast aluminum junction box IP67

Pressure rating

EN 1092-1 (DIN) PN10
ASME B16.5(ANSI)CLASS150

EN 1092-1 (DIN) PN16
ASME B16.5(ANSI)CLASS300

EN 1092-1 (DIN) PN25
ASME B16.5(ANSI)CLASS600

EN 1092-1 (DIN) PN40
ASME B16.5(ANSI)CLASS900

EN 1092-1 (DIN) PN63
ASME B16.5(ANSI)CLASS1500

EN 1092-1 (DIN) PN100
ASME B16.5(ANSI)CLASS2500

EN 1092-1 (DIN) PN250
HE IS 10K

EN 1092-1 (DIN) PN400
HE IS 20K



Product application specific standards

System power supply

12~30V DC

Body material

Stainless steel 1.4301(304) 

Stainless steel 1.4435 (316L) 

Internal Impeller and Attachment Material

430F Stainless Steel

Stainless steel 1.4435 (316L) 

(special option) VARIO

Customized with special parameters
The complete data of this selection table, please contact the sales staff or email to sales@kewill-auto.cn for complete samples.
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