Technical details Connection G1/4, Namur Nominal size 6 mm Temperature range -30°C ... +80°C Medium Filtered, oil-free and dried compressed air according to ISO 8573-1:2010, Class 7:2:4, instrument air, free of aggressive additives. Alternatively the pressure dew point must be at least 10°C below lowest occurring ambient temperature. Materials Body: stainless steel 1.4571, seals: PU, NBR, inner parts: stainless steel 1.4305 Protection IP 65 according to EN 60529 Valves in accordance with 2014/34/EU (ATEX) available. (Chapter 13) 5/2- and 5/3-way-valves 14 4 2 5 1 3 14 4 2 12 5 1 3 KNX-55-511-HN-xxx 5/2-way, single solenoid, mechanical spring return KNX-55-520-HN-xxx 5/2-way, double solenoid Model-no.: KNX-55-311 KNX-55-511 KNX-55-520 Operating pressure (bar) 3 ... 8 3 ... 8 3 ... 8 Pilot pressure (bar) 3 ... 8 3 ... 8 3 ... 8 Flow rate (Nl/min) 1280 1060 1050 Response time (ms) at 6 bar on: 13 off: 47 on: 12 off: 74 on: 14 off: 14 Weight (kg) 0.670 0.660 0.720