Dwyer VFLO Venturi Flowmeter with Magnehelic® Gage
Dwyer VFLO Venturi Flowmeter with Magnehelic® Gage

Dwyer VFLO Venturi Flowmeter with Magnehelic® Gage

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Dwyer VFLO Venturi Flowmeter with Magnehelic® Gage is fabricated from aluminum and has a gradual Venturi profile to reduce pressure losses through the meter. Flowmeter can be used in a vertical or horizontal position just by rotating the Magnehelic® gage.

The Magnehelic® gage provides a large, clear and accurate display of your differential pressure reading. Each meter is calibrated at standard atmospheric conditions. The dual scale reads in SCFM and in w.c. The meter is supplied with easy to read reference charts for various flow conditions. It is available in line sizes from 1″ to 4″ and can handle vacuum and pressure applications.

Dwyer VFLO Venturi Flowmeter Features

  • Gradual Venturi profile reduces pressure losses through meter helping to insure a more accurate measurement to meet measurement specifications
  • Easy to read gage through undistorted plastic face permits viewing from far away
  • Patented design provides quick response to pressure changes means no delay in assessing critical situations
  • Durable and rugged housing and high-quality components combined provides longservice life and minimized down-time


  • Filter monitoring
  • Air velocity with Dwyer pitot tube
  • Blower vacuum monitoring
  • Fan pressure indication
  • Duct, room or building pressures
  • Clean room positive pressure indication
Another Article:

Dwyer VFLO Venturi Flowmeter Specification

Service Air and non-combustible, compatible gases.
Wetted Materials Aluminum, silicone, acrylic, polycarbonate, high carbon steel, low carbon steel, brass, paper, acrylic paint, enamel paint, alkyd coating, nickel plate, zinc plate, helsel FC, 300 series stainless steel, PTFE, Loctite® AV sealant, commercial black rubber, neoprene, samarium cobalt, nickel alloy steel cover, beryllium copper.
Housing Die cast aluminum case and bezel, with acrylic cover. Exterior finish is coated gray to withstand 168 hour salt spray corrosion test.
Accuracy ±2.5% FS.
Pressure Limits -20″ Hg to 15 psig (-0.677 bar to 1.034 bar); MP option: 35 psig (2.41 bar). For applications with high cycle rate within gage total pressure rating, next higher rating is recommended.
Overpressure Relief plug opens at approximately 25 psig (1.72 kPa).
Temperature Limits 20 to 140°F (-6.67 to 60°C).
Size 4″ (101.6 mm) diameter dial face.
Mounting Orientation Diaphragm in vertical position. Consult factory for other position orientations.
Process Connection Female NPT of nominal line size.
Weight Gage only: 1 lb 2 oz (510 g), MP & HP 2 lb 2 oz (963 g)

Download Data Sheet: Series VFLO Venturi Flow Meter with Magnehelic® Gage

Ref: dwyer-inst.com

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