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DFV Packaged Natural Gas Replacement System 
 
  
  
  
DFV propane-air mixing systems from Algas-SDI are self contained units providing 
a mixture of LP-gas vapor and air which can replace natural gas. These compact 
systems are available in a variety of sizes ranging from 2.5 - 42 million BTU/Hr 
at delivery pressures from 5 to 12 psig atmospherically and 13-40 PSIG with 
compressed air. DFV systems use the Algas-SDI Direct Fired vaporizers and the 
Algas-SDI atmospheric venturi system packaged together with an ASME constructed 
accumulator tank. The gas is mixed with air in the venturi and stored in the 
accumulator tank to provide uninterrupted flow of mixed gas from full flow to 
zero flow, automatically. 
  
A liquid pump such as the Algas-SDI STABILAIRE pump 
system may be required to provide sufficient gas pressure for the mixing process. 
  
Features
100% turndown means these units are perfect for variable or steady loads 
Economical solution to lower gas bills 
Ensures your plant or facility will never be without gas 
110V/50-60Hz or 220V/50-60Hz 
Electrical consumption less than 1 amp 
Gas fired vaporizer with electric control system 
Systems up to 12 psig discharge pressure do not require compressed air 
 
Capacities  
2.5 - 42 MMBTU/hr  
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Date Last Edited: 
11/16/07 
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