• Overview

    The DK46/47/48/800 is a variable area (VA) flowmeter for monitoring and adjusting extremely small flow rates of liquids (from ≥0.04 l/h or ≥0.1 GPH) and gases (from ≥5 Nl/h or 0.22 SCFH). It is thus particularly useful for sample flow monitoring in analyser systems and gas chromatographs or measuring liquids and gases in laboratories and pilot installations. Blinds and supports are available for panel mounting to purge panels or similar applications. By using a lab support, the flowmeters can be converted into a desktop unit.

    Product features and options depend on device configuration: Contact us to make sure that your preferred functionality can be combined in one device.

    • * Cost-effective small purgemeter
    • * Low-cost measuring principle without auxiliary power
    • * Maximum measuring error: ±1 / ±2.5 / ±4% (acc. to VDI/VDE 3513-2) or ±1 / ±2 / ±3% of full scale
    • * Fine metering of very small volumes of liquids and gases
    • * Integrated high quality needle valve in foot or head piece
    • * Stainless steel, brass or PVDF fittings
    • * Suitable for use in Safety Instrumented Systems with SIL 2, in redundant design (1oo2) also in SIL 3 applications (type A device)
    • * No wearing parts

  • Specifications

    Depending on selected device configuration

    General information

    Product typeFlowmeter
    Product family nameDK
    Product positioningFor low flow gas or liquid applications and sample flow monitoring
    Measurement principleVariable area float
    Measured mediaLiquids, Gases

    Operating conditions

    Process pressuremax. 10 barg/
    145 psig
    Process temperature0…+100°C/
    -40…+392°F

    Materials

    Measuring tubeBorosilicate glass
    GasketsEthylene propylene diene monomer (EPDM), Polytetrafluoroethylene (PTFE), Perfluoroelastomer rubber (FFKM), Fluoroelastomer rubber (FPM)
    Process connectionAustenitic stainless steel (1.4404/316L), Polyvinylidene fluoride (PVDF), Nickel-plated brass

    Process connections

    Flange connectionsEN (1092-1): DN15…25
    ASME (B 16.5): ½…1"
    Thread connectionsFemale:
    G¼ ¼ NPT
    Other connectionsSwagelok;Serto, Ermeto; Hose; Gyrolok

    Approvals/Standards

    Certificates/Approvals NuclearNuclear qualification on request (e.g. acc. to ASME III, RCC-M/E, etc.)
    Certificates/Approvals ExATEX, NEPSI, PESO, UKEX
    Certificates/Approvals SafetySIL 2

    Communication

    Discrete outputsLimit switches
KROHNE DK46/47/48/800 Variable area flowmeter
Variable area flowmeter for low flow gas or liquid applications and sample flow monitoring
* Glass tube with analogue scale, valve and switches
* For low flows from ≥0.04 l/h or ≥0.1 GPH
* G and NPT threads; others on request
* -5…+100°C / +23…+212°F; max. 10 barg / 145 psig
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