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DW 18 Series Mechanical Flow Controller
Brand: KrohneThe 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
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