Pressure monitor for hot water, steam, gas, fuel (DWR)

Especially suitable as a pressure limiter for fuel gases (DVGW work sheet G 260) and liquid fuels (e.g. fuel oil), as well as for steam systems according to TRBS and hot water systems to DIN EN12828, systems in accordance to DIN EN12952-11 and DIN EN12953-9.
The DWR-205/-206 is used to limit maximum and minimum pressures and has an internal interlock.

Datasheet
User Manual
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For overpressure monitoring 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 EN 175301
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 oC
Media temp. limit temperatures up to 85 oC 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 oC
Ambient temp. limit at temperatures below 0 oC, 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
Mechanical lock/reset with special function possible
Optional functions add the type numbers below to the listed type numbers for extra functionality as described

• -213: gold-plated contacts, switching capacity: max. 24 Vdc, 100 mA, min. 5 Vdc, 2 mA. And others not available with adjustable switching difference.
• -301: terminal connection housing, IP65
• -513: Gold-plated contacts, single-pole switch-over. Switching differential permanent. IP65. Switching capacity: max. 24 Vdc, 100 mA, min. 5 Vdc, 2 mA, suitable isolating switching amplifier necessary, degree of protection Ex-i
Certificates
• TV.DWFS (SDBFS).17-281 according VdTUEV Memorandum Pressure 100, Issue 03.2017 and DIN EN 12952-11 and DIN EN 12953-9:2007
• ID 0000035004 according DIN EN 764-7:2002 and DIN EN 13611:2015-09
• CE-0085CL0343 according to DIN EN 1854, Issue 01.10.2010
• 01 202 931-B-11-0003 according Directive 97/23 EC
• SIL2 according IEC 61508-2

 

Fixed pressure hysteresis
Pressure adjustment range Adjustable switching differential Switching differential Max. pressure Type
bar bar bar bar
0.1 … 0.6 — 0.04 6 DWR06
0.2 … 1.6 — 0.06 6 DWR1
0.2 … 2.5 — 0.1 16 DWR3
0.5 … 6 — 0.2 16 DWR6
0.5 … 6 — 0.25 25 DWR625
3 … 16 — 0.5 25 DWR16
4 … 25 — 1 63 DWR25
8 … 40 — 1.3 63 DWR40
Adjustable pressure hysteresis
Pressure adjustment range Adjustable switching differential Switching differential Max. pressure Type
bar bar bar bar
0.1 … 0.6 0.08 … 0.5 — 6 DWR06-203
0.2 … 1.6 0.15 … 0.6 — 6 DWR1-203
0.2 … 2.5 0.17 … 1.4 — 16 DWR3-203
0.5 … 6 0.3 … 1.7 — 16 DWR6-203
0.5 … 6 0.4 … 2.5 — 25 DWR625-203
3 … 16 0.75 … 3.15 — 25 DWR16-203
4 … 25 1.3 … 6 — 63 DWR25-203
8 … 40 2.3 … 6.6 — 63 DWR40-203
Description Additional Product Type
Syphon for high temperature, steel, U-shape (for more accessories, see Accessories for Pressure Switches / Transmitters) U430B  
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