Esa, Inc.

Andrea Baio

Milco Dalfovo

Simone Losa

A double safety valve includes a valve body having an inlet opening for a pressurized fluid and an outlet opening, both communicating with connected chambers within the valve body which connection may be shut-off by shutters activated by corresponding electric coils. The shutters are placed along a common longitudinal axis opposite to each other, and activated independently for shutting off the connections between the chambers and the openings in favour of the fluid flow, that is to say pressurized fluid acting on the shutters so that the shut-off is maintained when the shutters are deactivated. Each shutter is kept in a shut-off position also by the fluid coming from the inlet openings acting on a first end of the shutter inside the corresponding electric coil.

Double safety valve

A radiant tube recuperative burner assembly having a heat exchanger () and a burner (); said heat exchanger () comprises: a first inner tube (); a second heat exchanger tube () coaxial and external to the first tube (); a third tube () coaxial and external to said second tube (); a fourth tube () positioned perpendicular to said first tube (); a fifth tube () coaxial and internal to said fourth tube (); a flue gas outlet passage () positioned inside said fifth tube (); a first gap () between said first tube () and said second tube (); a second gap () between said third tube () and said second tube (); a sixth gap () between said fourth tube () and said fifth tube (); said first gap () communicates with said sixth gap (); said second gap () communicates with said flue gas outlet passage (); a Venturi tube () positioned transverse to said fifth tube (); the inlet of the Venturi tube () communicates with said sixth gap (); said Venturi tube () has an outlet that is in communication with said flue gas outlet passage (); and with a connection pipe () between said heat exchanger () and said burner ().

Radiant tube recuperative burner assembly

A self-recuperative burner comprising: a burner body having an exchanger; said exchanger comprises a first duct for the combustion air and a second duct for the flue gases: at least one first flue gas discharge pipe; characterized in that it comprises an air inlet duct leading to a first annular chamber concentric to said at least one first flue gas discharge pipe; said first annular chamber being connected also to a Venturi tube positioned inside said at least one first flue gas discharge pipe.

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Treviolo, Italy

Andrea Baio