Process Heaters for Air and Gases 
Process Heaters for
Air and Gases

SYLVANIA Heaters are now branded OSRAM Heaters. Same high quality products and service.

Download the OSRAM Air Heaters Catalog

Specialty Flanged Inline (SFI)
Delivering safe, precise, and durable performance in a wide range of extremely demanding applications.

Growing global demand for fuel efficiency, reduced emissions, and renewable energy has given rise to research into new technologies dependent on ever increasing temperature and pressure gas streams. 

Whether for R&D,  Quality Testing of components, or as a key component in OEM equipment,  OSRAM’s Specialty Flanged Inline (SFI) Heaters deliver safe, precise, and durable performance in a wide range of extremely demanding applications.   Even our “Standard” products offer extreme levels of performance, while our “custom” models push the limits of technology.  


Typical Applications:

  • Combustion Research and Engine Development test stands:  Jet, auto, and diesel.

  • Valve testing for aviation maintenance, repair, and overhaul (MRO) facilities.

  • Fuel cell R&D test stands and heat-up operations.

  • Pollution control in SCR NOx and other Catalyst applications.

  • High temperature furnaces.

  • Pyrolysis applications.

  • Waste to energy processes.


Key Advantages:

Specialty Flanged Inline (SFI) inline heaters offer superior performance over conventional sheathed (“tubular” or “immersion”) style heaters because they are designed specifically for air and inert gas applications. 

OSRAM’s proprietary SERPENTINE element facilitates a very high power density and compact overall design.  SFI heaters can be as much as 8-12X smaller than equivalent tubular/immersion designs.

With this advantage, installations become smaller, lighter, and more cost effective, with a faster heat-up and cool-down time.  

Whether for a research test stand, factory production line, or key component in a product or system, OSRAM’s Specialty Flanged Inline heater is the right tool for the job.



  • Achieve temperatures up to 1500°F (815°C) and 1650°F (900°C) in custom design. 

  • Controllability +/- 2°F.

  • Rapid temperature ramp, up to 50°C per second in custom designs.

  • Power ratings in single heaters 18kW to 768kW Standard, 1 MW and higher in custom design.

  • Pressure Ratings up to 600 PSI (40 Bar) standard, >1100 PSI (75 Bar) in custom design.

  • Pressure vessels per ASME Section VIII Div. 1, certification services and documentation available upon request.

  • Pressure Equipment Directive (PED) certification is available for European customers.

  • ANSI and DIN flange sizes available.

  • SCR power and temperature control cabinets.

  • On-site start-up assistance and training available.

  • RoHS compliant.

  • Replaceable element cartridge.