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Variable Area Flow Meters by Orange Research

Series 2020 Variable Area Flow Meters
Orange Research’s Series 2020 flow meters use a fixed Derlin orifice centered on a flexible Buna-N or Viton diaphragm to provide sensitive response to changes in flow. Series 2020 features include:
Series 2020 variable area flow meter
  • Aluminum or 316 stainless steel bodies
  • Flow Range 0 – 20 gph
  • ¼ NPT inlet and outlet ports
  • Line pressures to 3000 psig
  • One or two reed switches
  • NEMA-4 enclosure for switch or relay (Model 2023 only)

    More Information
    Model 2021FG
    Model 2021FGS



    Series 2220 Variable Area Flow Meters
    Orange Research’s Series 2220 flow meters use a variable-area orifice design. The meters cone is Derlin standard or PTFE optional. Series 2220 features include:
    Series 2220 variable area flow meter
  • Aluminum, stainless steel, or naval bronze bodies
  • Flow Range 0 – 5 gpm
  • ¼ NPT inlet and outlet ports
  • Line pressures to 3000 psig (5000 optional)
  • One or two reed switches
  • NEMA-4 enclosure for switches or relays (Model 2223 only)


    Series 2320 Variable Area Flow Meters
    Orange Research’s Series 2320 employs the variable-area orifice design and features ½ inlet and outlet ports to accommodate higher flows than the 2220 Series. Series 2320 features include:
    Series 2320 variable area flow meter
  • Aluminum, stainless steel, or naval bronze bodies
  • Flow Rates 0 – 8 gpm
  • ½ NPT inlet and outlet ports
  • Line pressures to 3000 psig (5000 optional)
  • One or two reed switches
  • NEMA-4 enclosure for switches or relays (Model 2323FGS only)


    Series 2420 Variable Area Flow Meters
    For higher flows to 30 gpm Orange Research’s Series 2420 flow meters use the variable-area orifice design. The oversized dimensions and compact flow-through of Series 2420 flow meters ensures low-pressure drops. Series 2420 features include:
    Series 2420 variable area flow meter
  • Aluminum or 316 stainless steel bodies
  • Flow Rates 0 – 30 gpm
  • Line pressures to 1500 psig
  • One or two reed switches
  • NEMA-4 enclosure for switches or relay (Models 2423FGS and 2423FS only)


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