Inventor of Modified Venturi Nozzle Technology

THE STEAMGARD SYSTEM® applies the principles of two-phase flow technology to a custom modified Venturi Nozzle configuration

Innovative Design

Steam and condensate pass through the stainless steel STEAMGARD Condensate Removal Device by a series of staged steps. First, the denser liquid (condensate) throttles the specialized Venturi Nozzle, which keeps the steam from escaping. Erosive eddy currents are eliminated and any contamination is carried away with the condensate. Because condensate is created continuously in a working steam system, the condensate continuously chokes the Nozzle from losing steam as the condensate is effectively removed.

TCSartisticSGTHE STEAMGARD SYSTEM® has no moving parts.

Its components include:

  • A custom modified Venturi Nozzle to remove condensate
  • A high quality strainer and secondary screen to protect the stainless steel nozzle
  • A blowdown valve to clean the strainer of debris

The Science of the Nozzle

STEAMGARD Condensate Removal Devices utilizes a custom modified Venturi Nozzle to separate the steam from the condensate. In any piece of steam equipment before the steam trap, there is always a two-phase mixture (i.e., steam plus condensate).


      • At 1 Barg (14.5 psig), condensate is over 850 times denser than steam (density of condensate being 943 Kg/m3 versus 1.1 Kg/m3 for steam).
      • As the condensate density is much higher than steam, it moves at a much slower velocity through the venturi nozzle as compared to steam.
      • From the basic physics of two-phase flow, we know that the heavier phase (in this case condensate) preferentially passes through the nozzle as compared to the lower density steam.
      • In a system with both steam and condensate present, the slow moving condensate holds back the live steam and condensate is discharged preferentially through the nozzle.
      • Steamgard units always have a condensate seal at the inlet of the venturi nozzle.
      • For variable flow applications, the regulation of the capacity in a Steamgard venturi nozzle is achieved by the generation of flash steam as the hot condensate passes through the nozzle.
      • Flash steam is formed in the venturi due to the pressure drop between the inlet and the outlet of the unit.
      • This is per Bernoulli’s law according to which the fluid flow velocity (i.e., kinetic energy) through a pipe restriction must increase.  The increased kinetic energy comes at the expense of fluid pressure (i.e., potential energy).
      • The pressure drop occurs as a result of the condensate return system always being at a lower pressure than the steam.
      • As the saturated condensate travels from the inlet to the outlet of the nozzle, flash steam is produced which blocks any flow of live steam.

Steamgard Product-line

Replace virtually ALL steam traps on ALL applications, up to:

  • 3,000 PSIG/ 206 BAR (g)
  • and 950 °F/ 510 °C
  • from 0.5 inches to 4.0 inches
  • Long Life with Simple Maintenance


Quick Facts:

  • Each custom modified Venturi Nozzle is manufactured using Electrical Discharge Machining (EDM)
    and is ISO 9001 certified for quality control and manufacturing.
  • Precise design and manufacturing of Nozzle staging, lengths and angles.
  • Designed and manufactured with a low RA factor for the smoothest possible surface.
  • Only the highest grade stainless steel is used in our Venturi Nozzles ensuring there is never a degradation of the nozzle.

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  • Contact Details

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