Astra Automation > Products > Sensors and transducers > Pressure sensors > Explosion-proof pressure switch for hot water, steam, gas and FEMA Ex-DWR fuel
Explosion-proof pressure switch for hot water, steam, gas and FEMA Ex-DWR fuel

The Ex-DWR from FEMA is a series of explosion-proof pressure switches for hot water, steam, gas and fuel. These devices have been equipped with a fireproof housing. Their task is to detect the difference ...

The Ex-DWR from FEMA is a series of explosion-proof pressure switches for hot water, steam, gas and fuel. These devices have been equipped with a fireproof housing. Their task is to detect the pressure difference in relation to the atmospheric pressure.
 


Product selection table
Model Setting range Hysteresis Pressure
maximum
The switching difference is not adjustable
Ex-DWR06 0,1… 0,6 bar 0,04 bar 6 bar
Ex-DWR06-S 0,1… 0,6 bar 0,04 bar
Ex-DWR1 0,2… 1,6 bar 0,06 bar
Ex-DWR1-S 0,2… 1,6 bar 0,06 bar
Ex-DWR3 0,2… 2,5 bar 0,1 bar 16 bar
Ex-DWR3-S 0,2… 2,5 bar 0,1 bar
Ex-DWR6 0,5… 6 bar 0,2 bar
Ex-DWR6-S 0,5… 6 bar 0,2 bar
Ex-DWR625 0,5… 6 bar 0,25 bar 25 bar
Ex-DWR625-S 0,5… 6 bar 0,25 bar
Ex-DWR16 3… 16 bar 0,5 bar
Ex-DWR16-S 3… 16 bar 0,5 bar
Ex-DWR25 4… 25 bar 1,0 bar 63 bar
Ex-DWR25-S 4… 25 bar 1,0 bar
Ex-DWR40 8… 40 bar 1,3 bar
Ex-DWR40-S 8… 40 bar 1,3 bar
Explosion-proof pressure switch for hot water, steam, gas and FEMA Ex-DWR fuel

All data relating to the pressure ranges, including the scale divisions on the devices, should be understood as the pressure difference between the atmospheric pressure and the set switching pressure. The zero reference point on the scale of the device corresponds to the corresponding atmospheric pressure.

The EX-DWR FEMA series pressure controls are equipped with a fireproof housing. Thanks to the use of appropriate elements in the construction, in the event of a possible explosion of a mixture of gases, the impact will be in a resistant housing. The special design prevents the explosion from spreading to the environment.

Feel free to contact us regarding the pricing of the pressure switch model selected by you. We are also happy to answer any questions you may have regarding these and other devices available in our store's offer.

Parameter Value
Type of pressure relative
Pressure connection internal thread G¼, external thread G½
Electrical connection M16x1,5
Protection class IP65
Case material rugged housing resistant to sea water GD Al Si 12
Material of the measuring element 1.4104 + 1.4571
Temperature of the medium -20 ... 60ºC
Medium temperature limitation 60 ° C - higher temperatures are possible, but appropriate protection should be maintained.
Ambient temperature -20 ... 60ºC
Certificates • TV.DWFS (SDBFS) .12-281 complies with VdTUEV Memorandum Pressure 100, July 2006, DIN EN 12952-11 and DIN EN 12953-9: 2007
• ID 0000035004 in accordance with DIN EN 764-7: 2002 and DIN EN 13611: 2008
• CE-0085CL0343 according to DIN EN 1854 of July 2006
• 01 202 931-B-11-0003 according to directive 97/23 EC
• IBExU12ATEX1040 conforms to ATEX 94/9 / EG
• IECEx IBE 14.0077