Steam Boilers


GREENSTAR is a super-efficient gas/oil fired boiler having 95% overall thermal efficiency based on net calorific value (NCV or LHV) of gas/oil. GREENSTAR has three-pass configuration, two passes of smoke-tube type main boiler and the third pass in the form of economizer as a heat recovery unit to achieve maximum thermal efficiency. GREENSTAR is the most compact and lightweight smoke tube boiler, most suitable where space availability is very limited.


  • 95% overall thermal efficiency based on net calorific value (NCV or LHV). The 95% overall thermal efficiency results in large savings of petroleum fuels.
  • This gas / oil fired boiler GREENSTAR has optimized configuration of heating surfaces and tube sizes for efficient operation of the boiler.

Fuel Net Calorific Value Density Fuel Consumption (per ton of steam)
Furnace Oil 9710 kcal/kg 0.950 kg/l 61.62 l
LDO 10210 kcal/kg 0.826 kg/l 67.38 l
HSD 10280 kcal/kg 0.831 kg/l 66.53 l
LSHS 9710 kcal/kg 0.950 kg/l 61.62 l
Chicken Oil 10098 kcal/kg 0.900 kg/l 62.54 l
Waste Oil 8000 kcal/kg 0.900 kg/l 78.95 l
Natural Gas 8500 kcal/Sm 3 0.740 kg/Sm 3 66.87 Sm3
Hydrogen Gas 18798 kcal/Sm 3 1.115 kg/Sm 3 30.24 Sm3
LPG 11500 kcal/Sm 3 0.512 kg/Sm 3 49.43 Sm3


Steam Output (F&A 100°C) 1 Ton/hr to 34 Ton/hr or Higher
Safety Valve Set Pressure, bar(g) 10.54 / 17.5 / 21.0 / 25.0 or Higher
Maximum Steam Temperature  Dry & Saturated Or Superheated
Thermal Efficiency  95% on NCV/LHV of Fuel
Steam Generation Control  Step-less Modulation
Combustion Control  Step-less Modulation 
Draft Control  Step-less Modulation 


GREENSTAR is an Oil and Gas fired boiler, with 95% overall thermal efficiency, and it is widely used for industrial process heating applications.