CONTROL BOX* FOR FORCED DRAUGHT GAS BURNERS, WITH POWER UP TO 120KW. The SR3 - VE3 - BV3 - GV2 safety devices are suitable to control forced draught gas burners for civil and industrial applications. The BV3 control is used for fast boilers in which hot water (or steam) taking has to occur within short times, which cannot be granted by using the SR3 and VE3 devices. The GV2 control box is used for *all boilers in which a longer safety time is generally allowed. According to TüV Bayern, Monaco, the SR3 control is in compliance with the German regulation DIN 4788, part 3, for power up to 120KW. It also obtained the DIN-DVGW 89.11fBN approval, now expired and not renewable. The “Laboratorio di Macchine e Termotecnica del Centro Studi ed Esperienze” in Rome, Capannelle, tested the SR3 control for power up to 93KW, which obtained the certification no. 3704/81/77/3A and the approval of the Ministry of the Interior for fire prevention (circulars no. 68 and no. 42). | 
