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Product CategoriesFlow Meters - RotametersELF Purge flow metersEFR3 Constant flow regulatorEM-series flow metersEFR14 Constant flow regulatorEH-series flow metersEB-series flow metersELC Purge flow metersEMC-series flow metersEHC-series flow metersEBC-series flow meters

Esko EFR3 Constant Flow Regulator

Automatic regulation of flow rate for flows up to 3 liters/minute. Commonly supplied with ELF purgemeters, the EFR3 maintains low level liquid flows in applications where supply or backpressure varies, and for gas flows when backpressure varies.

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  • Applications

    • Liquid and gas purge applications
    • Tank level measurement
    • Designed for use with Esko ELF and Kytola LH / LT / LR flow meters
  • Features

    • Solid heavy-duty construction
    • Clearly labelled connection points
    • Compatible with variable area flow meters of corresponding flow range
  • Options

    • Viton / EPDM seals
SpecificationsOrder GuideData sheet (PDF)Request information

Technical Specifications

Maximum Flow

50 USGPH / 3 LPM H2O

Nominal Flow

36 USGPH / 2.3 LPM H2O

Body material

SS 316



O-ring seals

Nitrile (optional Viton / EPDM)

Maximum differential pressure

290 psi

Maximum static pressure

290 psi

Maximum temperature

167°F / 75°C


1/4" NPT or BSP


1.66bs / 0.75kg

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