The variable area flow meter is used to measure the flow rate of liquids and gases  and consists of vertically tapered tube through which the fluid to be measured is passed from smaller end of the taper and up to the larger end.  The fluid flow raises an indicator f(float) in the tapered tube increasing the area for passage of the fluid. The indicator moves up or down is in proportional to the fluid flow rate.  By varying the taper of the tube, the mass of the float, the length of the tube, different flow ranges can be calibrated. The standard turn-down ratio of this flow meter is about 10-to-1.  It has simple structure and cost effective and is widely used in various industry applications.  

Key Features 

• Dual scale: dual scale reads in SCH 40 and SCH 80
  
• Re-engineered: Now with even better accuracy, and we've kept the Classic
  
• Look including the Signature Red Cap.
• New Pitot Tube Design: For smooth fluid flow.
• Better float stability 
• Improved Accuracy: 1" through 2" = ±5% of rate, 2-1/2" through 8" = ±10% of rate.
• Reduced space needed
• New Red Float: Plastic will never corrode 
• Easy Reading: Bold, black, permanent printing.Large distance between lines
• Additional Accessory: Optional flow switch can be ordered separately for alarm feedback.
• Determine Circulation System flow rate in seconds.
• Quick installation 
• One piece machined acrylic meter body – polished to a clear finish.
• Read flow from either side of the meter body.
• Ships complete with gasket seal and mounting clamps
• Models for mounting on horizontal or vertical pipe
• F-300 Horizontal flow; D-300 Vertical down flow; U-300 Vertical up flow

Typical Applications 

• Ultra filtration equipment(reverse osmosis systems)
• Manufacturing and management of de-ionized water
• Commercial swimming pool industry
• Solar panel manufacturing and processing
• Water treatment systems   
• Coolant circulation