Product catalog Product catalog - Unicom

Pressure Switches, component tested
Minimum pressure limiter for hot water, steam, fuel, gas (DWR-B)
For minimum-pressure detection of steam, hot water, burnable gases, liquid fuels.
Kind of pressure overpressure, relative
Pressure connection internal thread G1/4, external thread G1/2
Electrical connection Plug DIN 43650
Protection class IP54
Housing material rugged housing of seawater resistant aluminium die casting GD Al Si
12
Sensing element material 1.4104 + 1.4571
Media temp. -25 ... 70 o C
Media temp. limit temperatures up to 85 o C are allowable for short periods. Higher
temperatures are possible, provided that the limit is safeguarded by
suitable measures (e.g. water tube trap, see Accessories for Pressure
Switches / Transmitters)
Ambient temperature -25 ... 70 o C
Ambient temp. limit at temperatures below 0 o C, ensure that no water condensation can
arise in the sensor and in the switching device
Switch function/capacity SPDT Microswitch 250 Vac; capacity 5 A inductive, 8 A resistive
Certificates ID 0000007042 according VdTUEV Memorandum Pressure 100/1,
Issue 4.83
ID 0000020757 according VdTUEV Memorandum Pressure 100/1,
Issue 4.83
NG-4347AQ1411 according DIN 3398, part 3, issue 11.92
3C028/5 according to DIN 3398, Part 4, Issue 10.86
CE0035BN0004 according Directive 97/23EC (Module B + D)
SIL2 according IEC 61508
Pressure interlock/Reset minimum press./button
Pressure adjustment range Max. pressure Allowable max. gas-pressure
(DIN3398P3)
Type
bar bar bar
0,1 ... 0,6 6 6 DWR06-206
0,2 ... 1,6 6 6 DWR1-206
0,2 ... 2,5 16 10 DWR3-206
0,5 ... 6 16 10 DWR6-206
0,5 ... 6 25 20 DWR625-206
3 ... 16 25 20 DWR16-206
4 ... 25 63 50 DWR25-206
8 ... 40 63 50 DWR40-206
Syphon for high temperature, steel, U-shape, for more accessories, see Accessories
for Pressure Switches / Transmitters)
U430B
24-21
16
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