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Series OP Orifice Plate Flowmeter

Brand: Dwyer Instruments, LLC

The Series OP Orifice Plate Flowmeter is a complete orifice plate flow metering package.

It incorporates a stainless steel orifice plate with a unique holder or carrier ring containing metering taps and integral gaskets. 

It was designed for use wherever there is an application for a conventional flow orifice plate. It can also be used in place of other primary differential producers for efficiency and cost effectiveness.

Installation is accomplished simply by slipping the unit between standard flanges (orifice flanges are not required). The Series OP is available in line sizes from 1/2" to 24" and can be used with compatible liquids and gases.
Features
  • Mounted with Standard Flanges
  • Corner Type Metering Taps
  • Corrosion Free Material
  • Simplified Installation
  • Stainless Steel Wetted Parts
  • Proven through a Wide Range of Applications for Energy Efficiency
  • Assures Long Term Reliability and Accuracy

1 - 12 of 48 Part Numbers
OP-A-1
OP-A-1
DWYER Orifice Plate Flowmeter, 0.5" Line Size, 0.200" Bore, 0.32 Beta, Water Capacity: 20" D.P. W.C., 0.62 GPM Flow, Air Capacity: 2.35 SCFM @ 14.7 psia, 3.63 SCFM @ 20 psig, 6.61 SCFM @ 100 psig, 1 Lb.
  • Line Size - 1/2"
  • Flow Capacity - Water - 20 in d.p. w.c. (Air - 20 in d.p. w.c.)
OP-A-2
OP-A-2
DWYER Orifice Plate Flowmeter, 0.5" Line Size, 0.310" Bore, 0.50 Beta, Water Capacity: 100" D.P. W.C., 3.44 GPM Flow, Air Capacity: 100" D.P. W.C., 12.21 SCFM @ 14.7 psia, 19.58 SCFM @ 20 psig, 36.37 SCFM @ 100 psig, 1 Lb.
  • Line Size - 1/2"
  • Flow Capacity - Water - 100 in d.p. w.c. (Air - 100 in d.p. w.c.)
OP-A-3
OP-A-3
DWYER Orifice Plate Flowmeter, 0.5" Line Size, 0.430" Bore, 0.69 Beta, Water Capacity: 320" D.P. W.C., 13.00 GPM Flow, Air Capacity: 200" D.P. W.C., 32.77 SCFM @ 14.7 psia, 56.15 SCFM @ 20 psig, 107.47 SCFM @ 100 psig, 1 Lb.
  • Line Size - 1/2"
  • Flow Capacity - Water - 320 in d.p. w.c. (Air - 200 in d.p. w.c.)
OP-B-1
OP-B-1
  • Line Size - 3/4"
  • Flow Capacity - Water - 20 in d.p. w.c. (Air - 20 in d.p. w.c.)
OP-B-2
OP-B-2
  • Line Size - 3/4"
  • Flow Capacity - Water - 100 in d.p. w.c. (Air - 100 in d.p. w.c.)
OP-B-3
OP-B-3
  • Line Size - 3/4"
  • Flow Capacity - Water - 320 in d.p. w.c. (Air - 200 in d.p. w.c.)
OP-C-1
OP-C-1
  • Line Size - 1"
  • Flow Capacity - Water - 20 in d.p. w.c. (Air - 20 in d.p. w.c.)
OP-C-2
OP-C-2
  • Line Size - 1"
  • Flow Capacity - Water - 100 in d.p. w.c. (Air - 100 in d.p. w.c.)
OP-C-3
OP-C-3
  • Line Size - 1"
  • Flow Capacity - Water - 320 in d.p. w.c. (Air - 200 in d.p. w.c.)
OP-D-1
OP-D-1
  • Line Size - 1.25"
  • Flow Capacity - Water - 20 in d.p. w.c. (Air - 20 in d.p. w.c.)
OP-D-2
OP-D-2
  • Line Size - 1.25"
  • Flow Capacity - Water - 100 in d.p. w.c. (Air - 100 in d.p. w.c.)
OP-D-3
OP-D-3
  • Line Size - 1.25"
  • Flow Capacity - Water - 320 in d.p. w.c. (Air - 200 in d.p. w.c.)
1 - 12 of 48 Part Numbers

Specifications

Accuracy

  • ± 0.7 % of Full Scale - Beta > 0.6
  • 0.6 % of Full Scale Flow - Beta = 0.2 to 0.6

Bore Size

  • 0.20” to 10.70” (5 to 23 mm)

Flow Rate

  • 0.62 to 8008 gpm (3 to 36,405 LPM) - Water
  • 2.35 to 66,737 scfm (4 to 1,13,387 m³/hour) - Air

Gasket Material

  • Buna-N

Materials of Construction

  • 304L Stainless Steel

Maximum System Pressure

  • psi: 100 (kPa: 689.5, bar: 7)

Media

  • Compatible Gas
  • Compatible Liquids

NPT Connection

  • 1/4” NPT Female

Orifice Size

  • 0.125”

Size

  • Line: 1/2” to 24”

Temperature Range

  • -45° to 93° C (-50° to 200° F)

Wetted Materials

  • 304 Stainless Steel

  • Fluid Flow Rates in Building Water Lines
  • Boiler Feedwater
  • Cooling Water
  • Combustion or Compressed Air
  • Steam Flow
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