Gruppo di sicurezza per scaldacqua ad accumuloSafety unit for hot water storage heatersGroupe de sécurité pour chauffe-eauVeiligheidsgroep voor boilerIENFRNLFunzioneFunctionFonctionFunctieI gruppi di sicurezza sono dispositivi utilizzati negli impianti idrosanitari per laprotezione degli scaldacqua ad accumulo.The safety groups are used in domestic water systems to protect hot water storageheaters.Les groupes de sécurité sont des dispositifs utilisés dans les installations sanitairespour protéger les chauffe-eau.Veiligheidsgroepen zijn toestellen die toegepast worden in warmwaterinstallaties terbescherming van de boiler.526554 DN 20 (3/4”) 319601 1” F x Ø 32/25 mm5265 3195265 series© Copyright 2019 CaleffiTechnicalspecificationProduct rangeMaterials:- Body safety unit: DN 20 brass EN 12165 CW617N- Body safety relief valve: PPSU- Ball valve: brass EN 12164 CW614N- Check valve: PPAG40- Safety relief valve obturator: EPDM- Safety relief valve seat: PPSU- Seals: EPDM- Safety relief valve spring: stainless steel EN 10270-1- Check valve spring: stainless steel EN 10270-3 (AISI 302)Medium: waterMax. inlet water temperature 65 °CMax. working temperature: 120 °CMax. working pressure: 10 barSafety relief valve opening pressure: 7 barConnections: inlet 3/4” M; outlet 3/4” F; discharge 1” M (ISO 228-1)Discharge flow rate at 8,4 bar (+20 % Po): - with water: > 650 l/h- with steam: > 225 kg/hH0007429www.caleffi.comSize of thehydraulic safetygroupMaximum power output ofthe water heater- - - - - - - - - - - -for direct heating systemsEN 1487Maximum power output of thewater heater- - - - - - - - - - - -for indirect heating systemsEN 1488Maximum volume ofthe water heaterEN 1488DN 20 10 kW 150 kW 1000 lFor further details see EN 1487 - clause 12.B531003