MODULATING LIGHT OIL BURNERS

VENTILATIONThe ventilation circuit is provided with a forward blades centrifugalfan, which guarantees high pressurelevels at the required air deliveries andpermits installation flexibility.In spite of the remarkable output powerand of the very high pressure performances, structuresof PRESS models are extremely compact.The use of sound proofing boxes help in reducing thenoise level.A variable profile cam connects fuel and air setting,ensuring fuel efficiency in all firing rates.Example of servomotor forair/light oil settingCOMBUSTION HEADTwo different lenghts of the combustion head can be chosen forthe various models of the PRESS P/Gseries of burners.The choice depends on the thickness ofthe front panel and the type of the boiler.Depending on the type of heat generator, it is necessaryto check the correct head penetration into the combustionchamber.These burners are equipped with a variable geometrycombustion head. The chance to control air speed incombustion head is essential to gain the full advantageof a modulating burner. This function allows optimumcombustion performance throught the working field,ensuring peak combustion efficiency thus saving on fuelconsumption.The following diagram shows the flame dimensions inrelation to the burner output. The lenght and diametershown in the diagram below should be employedfor a preliminary check: it is required a more careful investigation if combustionchamber dimensions are much different from the above reported values.Flame dimensionsExample of a PRESS P/G burnercombustion head74Flame lenght (m)65432100 1 2 3L maxL minD maxD min3,532,521,510,504 5 6 7 8 9 10Burner output (MW)Flame diameter (m)DLExample:Burner thermal output = 3500 kW;L flame (m) = 3,5 m (medium value);D flame (m) = 1 m (medium value)