Variable Area Flow Meters (Air or Liquid)




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VAF83 & VAF120 Series Variable Area Flow Meters are suitable for measuring the instantaneous flow rate of virtually any process liquid or gas. The principle of operation of the variable area flow meter is simple: the height attained by the float in its tapered flow tube is directly related to the flow rate which is exhibited by a calibrated scale.

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Readings should always be taken from the centre of the ball.

Low Flow Rates From 2-20cc/min (Air)

Direct Reading of Instantaneous Flow Rates

Easy To Read Scale

56mm or 93mm Tube Lengths

Minimal Maintenance

Long Service Life

Typical applications include gas flow control, dosing systems, purge metering, leak detection, blending systems & analytical instrumentation.

Standard Ranges VAF 83 Series (20C at 1013mb abs)

AIR:     2-20, 5-50, 10-100, 25-250, 50-500 cc/min       0.1-1.0,   0.2-2.5,   0.5-5.0,   1-10,   2-10 L/min

WATER: 5-50, 10-100,   25-250,   50-500 cc/min

Standard Ranges VAF 120 Series (20C at 1013 mb abs)

AIR:       25-250, 50-500, 100-1000 cc/min         0.5-5.0,   1-10,   2.5-25,   4-40 L/min

WATER: 5-50, 10-100,   25-250,   60-600, 100-1000 cc/min

Product Details

Model

VAF83 Series & VAF120 Series (Non Valved Design)

 

Sizes

Mounting Centres 83mm or 120mm

 

Chassis

Brush Finished Stainless Steel

 

Process Connections

Rear Facing 1/8" NPT Female (1/8" BSPP Female Optional)

 

End Blocks

Stainless Steel (Nickel Plated Brass Optional)

 

Cover

Polycarbonate

 

Seals

Viton (Nitrile Optional)

 

Measuring Tube & Scale

Borosilicate Glass With Permanently Fired Black Scale

 

Ball Floats

Black Glass, Stainless Steel, Ruby, Tungsten or Ceramic

 

Maximum Working Pressure

20 Bar (Liquid & Gas)

 

Maximum Working Temperature

60C Nitrile Seals & 100C Viton Seals

 

Accuracy

+/- 3% For Calibrated Scales

 

Weight

VAF83 - 170 Grams, VAF120 - 225 Grams

 

Options

Valved Design, Rear of Panel Mounting Kit, Alarm Function For Certain Flow Rates