Variable Area Flow Meter / Rotameter

Glass Tube Variable Area Flowmeter / Rotameter - GTG20

Glass Tube Variable Area Flowmeter. The flow meter operates is based on the variable area principle: fluid flow raises a float in a tapered tube, increasing the area for passage of the fluid. The greater the flow, the higher the float is raised. The height of the float is directly proportional to the flowrate.

A change in flowrate upsets this balance of forces. The float adjusts itself so that the buoyancy force B acting on it, wall tube resistance W and its downward gravitational force by weight of the float G are in equilibrium: G = B + W

It is important to note that because the float position is gravity dependent, flowmeter must be vertically oriented and mounted.


Features

• Stainless steel housing

• Different material available for process connection e.g Stainless steel, PVDF

• Thead, flange & hose connection

• Process Temperature: - 20°C to 100°C

• Operating pressure up to 10 bar (depending on meter size)

• Install up to 2 flow limit switches


Applications

Designed for flowrate measurements in many of industry including, food industry, water treatment plants and the chemical industry.


Specifications

Technical Details
Thermal Mass Flowmeter 20 Series - Without Display
Type In-line Integral Insertion Integral In-line Remote In-line Remote
Model FGL20 FGI20 FRL20 FRI20
Sensor Two reference grade platinum RTD clad in 316SS sheath
Wetted Part SS316
Power 24VDC Standard (12VDC or 115/230VAC optional)
Power Dissipation <6 W
Electronics Microprocessor based Remote-style Microprocessor based
Electronics Enclosure Integral mount, weathertight NEMA 4X blind enclosure Junction Box is Explosion Proof, Class 1, Div 1 & 2, Group B, C, D (no electronics)
Display Not Available
Turn Down 100 to 1
Resolution 1000 to 1
Low End Sensitivity 5 SFPM
Field Calibration Check Optional diagnostics Yes - Digital system
allows raw signal
validation (milli-watts)
Not Available
Communications RS232 Communication and software (upon request)
Approvals Not Available
Field Configurable Yes (upon request)
Flow Accuracy +/- 0.5% of Full Scale +/- 1% of reading
Flow Repeatability 0.2%
Respond Time 1 second
Gas Temperature Range -40°C to 90°C Standard (if higher temperature needed, contact Flotech)
Gas Pressure 500 PSIG (if higher pressure needed, contact Flotech)
Flow Output 4 to 20 mA for Rate, or 5VDC pulse for Totalized value (Transistor Output)
Temperature Output Optional 0-5VDC (if Flow Output disabled)
Ambient Temperature -20°C to 65°C
Flow Body In-line Integral (FGL20): 316SS Schedule 40 Flow Bodies sized from 1/4" x 6" long to 4" x 12" along. Male NPT ends standard (Flanges and other options available)
Insertion Integral (FGI20): Not Applicable
In-line Remote (FRL20): 316SS Schedule 40 Flow Bodies sized from 1/4" x 6" long to 4" x 12" long. Male NPT ends standard (Flanges and other options available)
Insertion Remote (FRI20): Not Applicable
Probe Style / Length In-line Integral (FGL20): Not Applicable
Insertion Integral (FGI20): 1/2" OD Probe (3/4" optional) Lengths 6" to 36"
In-line Remote (FRL20): Not Applicable
Insertion Remote (FRI20): 1/2" OD Probe (3/4" optional) Lengths 6" to 36"
Relays Not Available
Cable Length Not Applicable 7.5 m Standard (max. length 300 m)
Flow Conditioning In-line Integral (FGL20): Flow Conditioners
are built in to In-Line Style Flow Bodies from 1/2" to 4"
(Insertion Integral FGI20): Captive Flow Conditioners available upon request with meter purchase
In-line Remote (FRL20): Flow Conditioners are built in to In-Line Style Flow Bodies from 1/2" to 4"
Insertion Remote (FRI20): Captive Flow Conditioners available upon request with meter purchase
Note: Specifications are subject to change without notice

Enquiry

For all inquiries, you may contact us through Telephone, Email or Live Chat Support.

Operating Hours

Monday to Friday: 8.00am to 5.30pm

Technical Support (After Office Hours)

Tel: (65) 9876 6258

Contact Information

By Phone / FaxBy Email
Tel: (65) 6553 0366
Fax: (65) 6553 0828
info@flotech.com.sg

Flotech Approvals