© Oroflam s.r.l. 2011 Burner type GM25C is a seven-steps power modulating gas burner. The burner  modulation follows the temperature variation of the heating system outlet using a  temperature feeler that is part of the burner equipment.  It can be installed to work in combustion chambers of owens, little furnaces, hot air  generators, etc. expressely designed to be coupled with it. The burner may be  installed also in a normal cast-iron boiler or in a boiler with a little back-pressure in  the combustion chamber: please see the back-pressure graph on the left.  The burner can be easily transformed from natural gas (G20) to LPG (G30/31)  working: you have only to replace the gas valve diaphragm and change a  parameter of the modulation card without taking down the burner from the boiler.  The burner can also be controlled by an external modulation electronic device like  Siemens RWF40 or similar. Fuel Natural gas (G20) or LPG (G30/31) Technical Characteristics Table Burner power 5,000 - 22,400 kcal/h Power supply 230 V 50 Hz Motor power 42 W Power consumption maximum working 5.8 - 26.0 kW 105 W 60 W Natural gas capacity (G20) 0.6 - 2.7 m3/h Gas valve connection G 1/2’ The burner can be supplied with many kinds of temperature feelers both  immersion feelers and contact feelers suitable for it.  LPG (G30/31) capacity 0.2 - 1.25 m3/h Privacy & Cookies Besides the heating field, Oroflam s.r.l. deals also with plastic moulding, windings,  solenoid valves and cables production for third parties: please go to the site  homepage to see all our services.