Overview
The DW 181 is an inline flow controller for locally indicating the flow of homogeneous clean liquids without auxiliary power. It is suitable for horizontal or vertical pipes. The flow controller can have G or NPT threaded connections with sizes ranging from sup>3⁄4…2″. The measuring tube and connection are made of either bronze or stainless steel (1.4404 /316 L). Two types of indicator are available: a linear scale with up to two alarm positions at the top and bottom of the indicator or a dial.
The DW 181 is particularly suitable for cost-effective flow detection in various applications where high accuracy is not required. It can deal with flows of up to 30,000 l/h or 132.09 GPM (US). There is also a high-temperature version on offer for operating conditions up to +300°C / +570°F. The DW 181 is available as non-hazardous, intrinsically safe and explosion-proof version.
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 inline device
- Housing removable under process conditions
- Permanent readings in any position
- With dial or linear scale with up to two alarm positions
- High reliability and repeatability (±3% of switching point)
- Individually calibrated and tested
Specifications
Depending on selected device configuration
General information
| Product type | Flow controller |
| Product family name | DW |
| Product positioning | For clean liquids |
| Measurement principle | Deflector plate |
| Measured media | Liquids |
Operating conditions
| Process pressure |
max. 40 barg/ 580 psig |
| Process temperature |
-40…+300°C/ -40…+570°F |
Materials
| Measuring tube | Austenitic stainless steel (1.4435/316L) |
Process connections
| Thread connections |
Male: G¾, G1, G1¼, G1½, G1¾, G2 ¾ NPT, 1 NPT, 1¼ NPT, 1½ NPT, 1¾ NPT, 2 NPT |
Approvals/Standards
| Certificates/Approvals Ex | ATEX |
| Certificates/Approvals Nuclear | Nuclear qualification on request (e.g. acc. to ASME III, RCC-M/E, etc.) |
Communication
| Discrete outputs | Limit switches |
US 24820 
BR 22120 
GB 16770 
AU 9673 
CA 9033 
IN 6162 
IE 4394 
NZ 4217 
