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. Readings should always be taken from the centre of the ball.
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
| 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 |
Call us on 0044 (0)1233 730999 for more information |
Tel: 0044 (0)1233 730999
Fax: 0044 (0)1233 731133
sales@ashfordinstrumentation.com