HYDREXX™ Hot Water Powered LP-Gas Vaporizers

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Water Powered Liquified Propane Gas (LPG) Vaporizer

HYDREXX™ Hot Water Powered LP-Gas Vaporizers

HYDREXX™ fills the critical application niche where 3-phase electrical power is lacking, or where an open flame Direct Fired vaporizer is inappropriate.

If corrosion has plagued your installations then look no further. The HYDREXX butane / propane vaporizer manufactured by Algas-SDI is made from corrosion resistant materials for long life.

Coupled with Algas-SDI’s proven Liqui-SAFE valve, the HYDREXX LPG vaporizer provides a reliable and safe source of vaporized propane or butane. The HYDREXX is a perfect substitute for direct gas fired propane vaporizers where an increase in perceived safety is desired or where the vaporizer needs to be mounted in close proximity to the tank. It is common to install these units with compact wall-mount hydronic boilers making for a safe yet simple gas powered solution.


Corrosion FREE! Stainless steel tubes and aluminum water jacket ensure “ZERO” corrosion failures


Proprietary Liqui-SAFE™ Valve positively prevents liquid carry-over and provides visual indication when tripped


Compact design fits easily in cabinet or small room with wall-mount boiler


Operates on any LPG mixture from 100% propane to 100% butane


Perfect for any climate − rated from -40° F / -40° C


No electric components − no switches, thermostats, relays, or solenoid valves


Insulated heat exchanger


100% turndown


Hot water powered


Designed to ASME section VIII, Div 1


PED marked



  • 160, 320 & 500 kg/hr
  • 80, 160 & 250 GPH nominal

The Heating Process

HYDREXX is a compact indirect heated vaporizer. The heat source can be excess hot water from a process or from a dedicated hydronic boiler (remote or packaged from the factory).

HYDREXX is corrosion resistant! The heating medium (hot water) flows inside stainless steel tubes encased by the aluminum shell. The process fluid (e.g. propane, butane or LPG) is admitted on the shell side and extracts the heat from the stainless steel tubes. Our proprietary Liqui-SAFE™ valve prevents liquid LPG from passing downstream of the vaporizer. And in the event of a ‘high liquid level’ occurrence, the LiquiSAFE™ valve provides visual indication of activation.

The “free-standing” HYDREXX HX Series is limited in supply scope to the heat exchanger, Liqui-Safe™ Valve and relief valve. All other appurtenances must be sourced locally or requested as options from Algas-SDI. A generalized installation is shown in the diagram below.

HYDREXX Applications

Additional LPG and Propane Vaporizers

At Algas-SDI our philosophy is that vaporizers should be safe, simple, and reliable. Our vaporizers are designed with decades of experience with LPG and various conditions all around the world. When you use an Algas-SDI vaporizer you are using the best!

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