Alerton Maximum pressure limiter of "special construction" (SDB) Maximum pressure limiter with selfmonitoring sensor and internal relock For steam and hot water. 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.: -20...70C 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: -20...70C 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 Certificates: TUEV-SDB-11-134 according VdTUEV Memorandum Pressure 100, Issue 07.2006, DIN EN 12952-11, Issue 09.2007 and DIN EN 12953-9, Issue 09.2007 01 202 931-B-11-0001 according to Directive 97/23/EC SIL2 according IEC 61508 Pressure interlock/Reset: maximum press./button