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Variable Area Flowmeters

VARIABLE AREA FLOWMETERS

Pure Aqua distributes variable area flowmeters from Blue White Industries that are designed to be highly durable, polished, and with a one piece meter body. These flowmeters are annealed for maximum strength and resistance to harmful chemicals. They are suitable for outdoor installations and exposure to direct sunlight. 
Additional features include a comprehensible permanent scale, with a back reflector for simple instructions, and stainless steel coating for resistance against corrosive environments. 
F-300 Acrylic Flowmeter

F-300 ACRYLIC FLOWMETER

  • Pipe sizes: 1" - 8"
  • Flow Rates: 4 to 2,200 GPM
  • Material: Acrylic
  • Clamp-On Saddle Mount
FLOWREAD

FLOWREAD

  • Pipe sizes: 1½" - 2½"
  • Flow Rates: 10 to 150 GPM
  • For use on PVC Pipes
  • Clamp-On - Insertion Mount
F-400 Acrylic Flowmeter

F-400 ACRYLIC FLOWMETER

  • Pipe sizes: ¼", ⅜" & ½"
  • Flow Rates: 0.025 to 5 GPM
  • Accuracy: +/- 5%
  • For UltraPure Applications
F-410N Acrylic Flowmeter

F-410N ACRYLIC FLOWMETER

  • Pipe sizes: ¾" and 1" NPT
  • Flow Rates: 5 to 20 GPM
  • Full Scale Accuracy: +/- 5%
  • Material: Acrylic
F-420N Acrylic Flowmeter

F-420N ACRYLIC FLOWMETER

  • Connection Sizes: 1"- 1 ½" NPT
  • Flow Rates: 5 to 50 GPM
  • Pipe sizes: 1 ½" MNPT
  • Full Scale Accuracy:+/- 5%
F-430N Acrylic Flowmeter

F-430N ACRYLIC FLOWMETER

  • Pipe sizes: 1 ½" & 2"
  • Accuracy: +/- 5%
  • Flow Rates: 4 to 100 GPM
  • Direct Reading Scale
F-550 Acrylic Flowmeter

F-550 ACRYLIC FLOWMETER

  • Connection Sizes: ¼" - ¾"
  • Flow Rates: 0.025 - 20 GPM
  • Accuracy: +/- 5%
  • Material: Machined Acrylic
F-440 Polysulfone Molded

F-440 POLYSULFONE MOLDED

  • Connection Sizes: ⅜" - ¾" NPT
  • UV Resistant
  • Flow Rates: .025 to 5 GPM
  • Compact Size
F-450N Polysulfone Molded

F-450N POLYSULFONE MOLDED

  • Connection Sizes: ⅜" - ¾" NPT
  • Panel Mount, Adjustable
  • Flow Rates: 0.1 - 10 GPM
  • Brass Adapters Available
F-451 Polysulfone Flowmeter

F-451 POLYSULFONE FLOW METER

  • Connection Sizes: 1 - 1-½" FNPT
  • Flow Rates: 0.5 - 40 GPM
  • Accuracy: +/- 2%
  • Material: Polysulfone
F-452N Polysulfone Moulded

F-452N POLYSULFONE MOLDED

  • Connection Sizes: 2" FNPT
  • Flow Rates: 2 - 175 GPM
  • Accuracy: +/- 2%
  • Material: Polysulfone
F-460 Polysulfone Molded

F-460 POLYSULFONE MOLDED

  • For UltraPure Applications
  • Flow Rates: .1 to 5.0 GPM
  • Material: Polysulfone
  • ½" - ¾" FNPT/Fusion
F-462 Polysulfone Molded

F-462 POLYSULFONE MOLDED

  • Connection Size: 2" FNPT
  • For UltraPure Applications
  • Flow Rates: 2 - 80 GPM
F-461 Ultrapure

F-461 ULTRAPURE

  • Connection Size: 1" FNPT
  • Rib Guided Float
  • Flow Rates: 1 - 35 GPM

The variable area flow meter is used in industrial applications to monitor vapor flow rates. A funnel and float make up the variable area flow meter. The float's fluctuation to changes in the rate of flow is very straightforward.

Variable area flow meters are also designed to allow for significantly more versatility. There is a fairly large measuring area, plus higher pressure during operation that makes this flow meter desirable. It's easy to set up and manage.

Variable Area Flow Meter: Operational Principles

The variable area approach governs the functioning of the meter: fluid flow lifts a float in a tapered tube, increasing the area available for fluid passage. The float is lifted higher as the flow increases. The flowrate is related to the elevation of the float. The float is increased in liquids by a mixture of the liquid's buoyancy and the fluid's velocity head. With gases, buoyancy is almost non-existent, and the float reacts solely to the velocity head. The fluid flowrate and the annular area between the float and the tube wall determine how far the float goes up or down in the tube.

This equilibrium of pressure is thrown off by a change in the rate of flow. The float then changes direction until it gets to a point in which the conditions are balanced once more. For each steady flowrate, the variable area flow meter float adopts an unique place to fulfill the power formula. Variable area flow meter, on the other hand, must be vertically orientated and installed because the float position is gravity dependant.