MODULATING LIGHT OIL BURNERS

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FUEL SUPPLYHYDRAULIC CIRCUITVarious hydraulic circuit are available, depending on fuel outputasset according to local norms of steam generators.The burners are fitted with two valves (a safety valve andan operation valve) and an oil filter along the oil line fromthe pump to the nozzle.A pressure regulator on the return circuit from the nozzleallows to vary the quantity of fuel burnt.A double safety valve on the return circuit avoids oil leakagefrom the nozzle when the burner is in stand-by and prepurgephase.The models are fitted with a maximum pressure switch onthe oil return circuit.Example of the hydraulic circuit on PRESS 200 P/GEN 267 > 100 kg/hPFOVS VFVR1 VRPOmaxM SMROMRUPFOVSVFUMRSMROPO maxVRVR1Pump with filter and pressureregulator on the output circuitOil filterSafety valve on the output circuitWorking valve on the output circuitNozzlePressure gauge on the return circuitServomotorPressure regulator on the returncircuitMax. Oil pressure switch on thereturn circuit1st safety valve on the return circuit2nd safety valve on the return circuit
SELECTING THE FUEL SUPPLY LINESThe fuel feed must be completed with the safety devices required by the local norms.The table shows the choice of piping diameter for the various burners, depending on the differencein height between the burner and the tank and their distance.ModelDiameter piping+H, -H (m)+2,0+1,5+1,0+0,50-0,5-1,0-1,5-2,0-3,0MAXIMUM EQUIVALENT LENGTH FOR THE PIPING L[m]P 140 P/GP 200 P/GP 300 P/GØ14mmL max (m)5045403530252015105Ø16mmL max (m)70656050454035302515Ø16mmL max (m)4035302520181513105Ø18mmL max (m)60555045403530252010Ø1/2”L max (m)25232018151210853Ø 3/4”L max (m)85807065605045353015P 450 P/GØ 3/4” Ø1”L max (m) L max (m)55 13050 12045 11040 10035903080257020601545102567109 5 VP+H10 cm847 5 3921H Difference in height pump-foot valveØ Internal pipe diameterP Max. height 10 mV Height 4 m1 Burner2 Burner pump3 Filter4 Manual shut off valve5 Suction pipework6 Bottom valve7 Remote controlled rapid manualshut off valve(compulsory in Italy)8 Type approved shut off solenoid valve(compulsory in Italy)9 Return pipework10 Check valve-H6noteWith ring distribution oil systems, the feasible drawings and dimensioning are the responsibilityof specialised engineering studios, who must check compatibility with the requirements andfeatures of each single installation.
Page 2 and 3: TECHNICAL DATAModelP 140 P/GP 200 P
Page 6 and 7: VENTILATIONThe ventilation circuit
Page 8: OVERALL DIMENSIONS (mm)BURNERAEF -

MODULATING LIGHT OIL BURNERS

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