Hoffer Positive Displacement Flowmeter, Oval Gear Series
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Oval Gear Series Positive Displacement Flowmeter

Brand: Hoffer Flow Controls
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The unique design of Hoffer’s Oval Gear meter incorporates two SMOOTH (toothless) oval gears 90 degrees out of phase. 

The measurement gears are held together by two timing gears. 

The timing gears have a pitch diameter equal to the outside diameter of the measurement gears. 

The flow through the meter measurement chamber follows the path of least resistance. 

Therefore no liquid passes through the center cavity between the measurement gears.
Features
  • Patented toothless oval gear construction. U.S. Patent 5,992,230
  • High accuracy
  • Compact design
  • High resolution electronic output
  • Stainless steel ball bearing, self-lubricating
  • 316 stainless steel with brass thrust plate construction (standard)
  • No special gears needed for high viscosity
  • Linearity unaffected by viscosity changes
  • 1" Male NPT End Fitting (Standard)

Specifications

Brand

Approvals & Certifications

  • ATEX: EX II 2 GD Ex d TD IIC, IP66/68
  • CE
  • CSA: Class I, Div. 1, Groups A, B, C, D, Class II, Div. 1, Groups E, F, G, Class III, Type 4X EX D IIC, Class I, Zone 1, IP66
  • FM: Class I, Div. 1, Groups A, B, C, D, Class II/III, Div. 1, Groups E, F, G, Type 4X
  • IEC EX D IIC IP68
  • PED

Bearing Material

  • Stainless Steel

Enclosure, Body Material

  • 316 Stainless Steel with Brass Thrust Plate Construction (Standard)

Environmental Protection

  • IP66
  • IP68

Flange Material

  • 316 Stainless Steel
  • Carbon Steel

Flange Size - 1” (DN 25)

  • 1” (DN 25) - 150#
  • 1” (DN 25) - 300#
  • 1” (DN 25) - 600#
  • 1” (DN 25) - 900#

NPT Connection

  • 1” NPT Male

O-Ring Material

  • Viton

Operating Temperature

  • -28.9° to 190.6° C (-20° to 375° F)

Documentation

Data Sheets

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