| The Mechanical Flow Controller
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.
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 | Mechanical, autonomous flow switches - no power supply needed
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| For horizontal and vertical pipes from DN 15 up to DN 3000 - and higher
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| High reliability and repeatability
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| Proven technology - for more than thirty years
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| Bistable reed switches, SPDT switches and relays available
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| Optional second limit switch
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| Switch position can be adjusted under process conditions
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| High-temperature version (without indicator) for operating conditions up to 300°C / 570°F
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| Housing is removable under process conditions
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| Optional approval for EEx I or EEx d applications
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| No maintenance needed |
| DW 181 flow controller
The DW 181 inline flow controller is suitable for horizontal or vertical pipes. It can have G or NPT threaded connections, sizes ranging from ¾...2".
The measuring tube and connection are made of either bronze or 316 L (1.4404) stainless steel.
There are two types of indicator available for this variant: | a linear scale with up to two alarm positions at the top and bottom of the indicator (as shown) or
| | a dial which has been made specifically for this instrument and tested on a calibration rig. |
For information on DW 181 flow ranges, please refer to the flow range tables.
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| DW 182 flow controller
The DW 182 inline flow controller is suitable for horizontal or vertical pipes. It has flanged connections, sizes ranging from DN 15...DN 65 or from ½...2½".
The measuring tube and connection is made of 316 L (1.4404) stainless steel. There are two types of indicator available for this variant: | a linear scale with up to two alarm positions at the top and bottom of the indicator or
| | a dial (as shown) which has been made specifically for the instrument and tested on a calibration rig. |
For information on DW 182 flow ranges, please refer to the flow range tables.
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| DW 183 flow controller
The DW 183 inline flow controller is suitable for horizontal or vertical pipes. It has with flanged connections , sizes ranging from DN 65...DN 200 and 2½...8".
The measuring tube and connection is made of either XC 18 (1020) carbon steel or 316 L (1.4404) stainless steel.
Carbon steel flanges with nominal diameters bigger than 100 or 4" can have 316 L stainless steel cladding. There are two types of indicator available for this variant:
| a linear scale with up to two alarm positions at the top and bottom of the indicator or
| | a dial (as shown) which has been made specifically for this instrument and tested on a calibration rig. |
For information on DW 183 flow ranges, please refer to the flow range tables.
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| DW 184 flow controller
The DW 184 insertion-type flow controller checks flow velocity. It is suitable for horizontal and vertical pipes with nominal diameters of 250 mm / 10" or bigger - there is no maximum pipe diameter.
It is installed on a DN 150 PN 16/40 or 6" ASME150/300 lbs mounting flange. The measuring tube and connection is made of either 1020 (XC 18) carbon steel or 316 L (1.4404) stainless steel.
A mounting flange made of carbon steel can also have 316 L stainless steel cladding. One type of indicator is available for this variant:
• a linear scale with alarm positions at the top and bottom of the indicator.
For information on DW 184 flow velocity ranges, please refer to the flow range tables.
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