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DW 18 Series Mechanical Flow Controller

Brand: Krohne
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The DW 18 series of flow controller is ideal for locally indicating the flow of homogenous clean liquids.

Adjustable switches generate alarms once switching points are reached.

The units are robust.

Several variants are available to suit a wide variety of applications.
Features
  • Proven technology - for more than thirty years
  • Bistable reed switches, SPDT switches and relays available
  • Optional second limit switch
  • Switch position can be adjusted under process conditions
  • Suitable for pipes DN 15 to 3000 or 1/2" to 120" in diameter
  • High-temperature version (without indicator) for operating conditions 0° to 300° C (0° to 570° F )
  • Housing is removable under process conditions
  • Optional approval for EEx I or EEx d applications
  • No maintenance needed
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The DW 18 series of flow controller is ideal for locally indicating the flow of homogenous clean liquids.

Adjustable switches generate alarms once switching points are reached.

The units are robust.

Several variants are available to suit a wide variety of applications.
Features
  • Proven technology - for more than thirty years
  • Bistable reed switches, SPDT switches and relays available
  • Optional second limit switch
  • Switch position can be adjusted under process conditions
  • Suitable for pipes DN 15 to 3000 or 1/2" to 120" in diameter
  • High-temperature version (without indicator) for operating conditions 0° to 300° C (0° to 570° F )
  • Housing is removable under process conditions
  • Optional approval for EEx I or EEx d applications
  • No maintenance needed
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Specifications

Brand

Accuracy

  • ± 15 %

Ambient Temperature Range

  • High-Temperature: -25° to 60° C (-13° to 140° F)
  • Standard: -40° to 80° C (-40° to 175° F)

Applications

  • Air Conditioning (HVac)
  • Cavitation Alarm
  • Chemical Industry
  • Cooling Systems
  • Flow Detection
  • Lubrication Control
  • Oil & Gas Applications
  • Petrochemical
  • Pump Protection
  • Water

Approvals & Certifications

  • ATEX II 1 G/D EEx ia, 1/2 G/D EEx d IIC T6 to T3 IP65 T195° C to T80° C
  • CE

BSP Connection

  • G 1”
  • G 1-1/2”
  • G 2”
  • G 3/4”

Cable Entry

  • Exd: 3/4” NPT
  • Exd: M20 x 1.5
  • Exd: M25 x 1.5
  • HT: PG9
  • Non-Ex/Exi: PG13.5

Cap Material

  • 316L Stainless Steel, 1.4401

Connection Material

  • 316L Stainless Steel, 1.4401
  • DW 181: Bronze
  • DW 183, DW 184: Carbon Steel
  • XC 18 (1020) Steel

Current

  • EEx I: < 500 mA for K1 & K2 Switch

Electrical Contacts

  • Normally Closed
  • Normally Open

Electrical Rating

  • K1 & K2 Switch: Max.
  • K1 Switch: Max.
  • K1(HT) & K2(HT) Switch: Max.
  • KV1 & kV2 Relay: Max.

Enclosure, Body Material

  • Ex d Version: Aluminum
  • Non-Ex/Ex I Versions: Polycarbonate

Environmental Protection

  • EEx d: IP65 According to EN 60529
  • High-Temperature: IP44 According to EN 60529
  • Standard Variants: IP55 According to EN 60529

Flange Material

  • DW 183, DW 184: Carbon Steel

Flange Size - 1-1/2” (DN 40)

  • 1-1/2” (DN 40) - 150# ANSI/ASME B16.5
  • 1-1/2” (DN 40) - 300# ANSI/ASME B16.5
  • 1-1/2” (DN 40) - PN 40

Flange Size - 1” (DN 25)

  • 1” (DN 25) - 150# ANSI/ASME B16.5
  • 1” (DN 25) - 300# ANSI/ASME B16.5
  • 1” (DN 25) - PN 40

Flange Size - 1/2” (DN 15)

  • 1/2” (DN 15) - 150# ANSI/ASME B16.5
  • 1/2” (DN 15) - 300# ANSI/ASME B16.5
  • 1/2” (DN 15) - PN 40

Flange Size - 2-1/2” (DN 65)

  • 2-1/2” (DN 65) - 150# ANSI/ASME B16.5
  • 2-1/2” (DN 65) - 300# ANSI/ASME B16.5
  • 2-1/2” (DN 65) - PN 16

Flange Size - 2” (DN 50)

  • 2” (DN 50) - 150# ANSI/ASME B16.5
  • 2” (DN 50) - 300# ANSI/ASME B16.5
  • 2” (DN 50) - PN 40

Flange Size - 3” (DN 80)

  • 3” (DN 80) - 150# ANSI/ASME B16.5
  • 3” (DN 80) - PN 40

Flange Size - 4” (DN 100)

  • 4” (DN 100) - 150# ANSI/ASME B16.5
  • 4” (DN 100) - PN 16

Flange Size - 5” (DN 125)

  • 5” (DN 125) - 150# ANSI/ASME B16.5
  • 5” (DN 125) - PN 16

Flange Size - 6” (DN 150)

  • 6” (DN 150) - 150# ANSI/ASME B16.5
  • 6” (DN 150) - PN 16

Flange Size - 8” (DN 200)

  • 8” (DN 200) - 150# ANSI/ASME B16.5
  • 8” (DN 200) - PN 10

Flow Rate

  • DW 181 & 182: 0.09-0.70 to 35.22-88.06 gpm (20-160 to 8,000-20,000 L/hr)
  • DW 183: 44-106 to 440-1,101 gpm (10-24 to 100-250 m³/hour)

Function

  • Flow Monitor in Horizontal or Vertical Pipes

Gasket Material

  • FKM
  • FPM
  • High-Temperature (HT): Klingerit
  • Per Buna-N
  • Silicone

Materials of Construction

  • DW 183: Carbon Steel
  • Electric Cable Sheath - HT Version: Fibre Glass
  • Measuring Tube: 316L Stainless Steel, 1.4401
  • Measuring Tube: Bronze for DW 181
  • Measuring Tube: XC 18 (1020) Steel for DW 183
  • Switch Sheath - HT Version: PTFE
  • Wiring Box - HT Version: Aluminum

Operating Pressure

  • Maximum

Operating Temperature

  • 0° to 300° C (32° to 572° F)

Power

  • EEx d: 20 VA, Max.

Power Supply

  • Instrument Terminal - kV1, kV2 Relay: 110 Vac
  • Instrument Terminal - kV1, kV2 Relay: 110 Vdc
  • Instrument Terminal - kV1, kV2 Relay: 24 Vac
  • Instrument Terminal - kV1, kV2 Relay: 24 Vdc
  • Instrument Terminal - kV1, kV2 Relay: 240 Vac
  • Instrument Terminal - kV1, kV2 Relay: 48 Vac
  • Instrument Terminal - kV1, kV2 Relay: 48 Vdc

Pressure Range

  • psig: 232 (kPa: 1,600, bar: 16) for DW 183
  • psig: 580 (kPa: 4,000, bar: 40) for DW 181, 182

Process Temperature

  • High-Temperature: -25° to 300° C (-15° to 570° F)
  • Standard: -40° to 120° C (-40° to 248° F)
  • Ventilated: -40° to 150° C (-40° to 302° F)

Repeatability

  • ± 3 %

Response Time

  • KV1, kV2 Relay: 5 to 12 milliseconds

Storage Temperature

  • -40° to 85° C (-40° to 185° F)

Switch Type

  • DPDT
  • SPDT
  • SPST

Viscosity

  • Special Variants: ≤ 250 MPas / 0.168 lbs / fts
  • Special Variants: ≤ 90 MPas / 0.06 lbs / fts
  • Standard Variants: ≤ 30 MPas/0.02 lbs/fts
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