Abstract: Herein proposed is a system (1) for producing energy from hydrogen, in particular for residential buildings, for example heat energy, including a catalytic burner (4) with hydrogen supply, with water/water heat exchanger power supplying a thermal unit, for example a system for heating and/or producing domestic water for a residential building or the like, such system (1) further including a fuel cell (5) which can also be supplied with hydrogen for producing electrical power, and having an associated cooling device (13; 27) and an associated inverter (13) or DC/DC unit (25) for producing alternating or direct current, wherein the air or water for cooling the fuel cell (5) during operation are used for heating within the system (1) increasing performance thereof. Performance is increased further by associating a heat pump to the system (1).

Abstract: A hydrogen generator system includes an electrolyzer for executing a water electrolysis process and associated devices for operation thereof to produce hydrogen and oxygen, and functionally interconnected to each other: 1) a device for recovering heat generated by the electrolysis and cooling of the electrolyzer, 2) a device for storing the generated hydrogen, 3) a burner for generating heat, and 4) a fuel cell for producing electrical energy. The burner and the fuel cell are connected in parallel and suppliable with the hydrogen produced directly by the electrolyzer and/or with the hydrogen drawn from the storage device, as well as respective circuit and control and adjustment components. The entire hydrogen generator system is accommodated in a casing, which has externally a plurality of inlet connection fittings for the water and electrical power supply system for supplying the electrolyzer and outlet connection fittings for the various services and products supplied.

Abstract: A hydrogen generator system (1) for a hydrogen powered unit or user (3), such as for example a catalytic hydrogen burner or a fuel cell, includes an electrolyzer (2) for the electrolysis of distilled water, producing hydrogen and oxygen, provided with a demineralizer device (5) and an A/C transformer/converter unit (7) for supplying electrical power for the electrolysis process and, on the outlet side, a device for purifying the hydrogen produced, such system (1) further includes: a device (10) for recovering the heat generated by the electrolysis process and/or a device (17) for storing the hydrogen produced, such hydrogen generator system (1) is accommodated in a casing (20) which has—externally—inlet and outlet connection fittings.

Abstract: A burner (20) for the combustion of hydrogen on a catalyst, has a body (21), a first self-ignition catalyst (23) and a subsequent group of oxidation catalysts (26), as well as a heat exchanger (35) heated by the burnt gases, wherein in the burner (20) the heat exchanger (35) is obtained as a common heat exchanger and it is arranged outside the body (21) of the burner (20) accommodating the catalysts (23, 26). A head (22) accommodating the self-ignition catalyst (23) may be separated by a body (40) accommodating the oxidation catalysts (26). A second heat exchanger (45), passed through by cold water, allows production of high purity distilled water. In the proposed boiler (41) a first part (42) accommodates the burner modules (20) and another part (43) accommodates the common heat exchanger (35) and the possible additional heat exchanger (45) for producing distilled water.

Abstract: An improved ball valve (1), in particular for gas systems, includes a tampering indicating seal (25) made by injection molding a synthetic or metal material into cavities (19; 21; 22) formed in the screw-clamping nut assembly (11, 13) and including a cap outer portion (29) which substantially covers the surface of the outer face of the nut (13) and/or extending (29A) on the side surface of the nut (13).

Abstract: An improved actuator (1) for water heating/cooling and sanitary systems includes a miniaturized D.C. Motor (2) with a mechanical clutch element (4), a first motor reducing unit (6) including a planetary reducing unit with a high gear ratio, a second reducing unit (14) for transforming a rotary movement into a reciprocating axial movement, and a supporting framework (29, 7, 9, 26) for supporting the components, and an electronic card (37) for controlling and driving the motor (2). A plurality of coupling adapters (33) allow the improved actuator (1) to be coupled to manifolds of different manufacturers.

Abstract: An improved metal ball valve for gas comprises a shutter housing chamber in which are provided two opposite sides or flats allowing to define annular recesses in which shutter sealing gaskets are substantially integrally engaged. The shutter weight is advantageously reduced by providing, for example, a bottom flattened portion and an axial hole, the shutter forming moreover, with the valve rod element, preferably a single-piece assembly, the rod-shutter assembly being held in the body of the valve by upsetting thereon the thinned end crown of a collar of the valve body.

Abstract: Valve for testing and draining sprinkler systems comprises a half-body with an inlet channel and a half-body with an outlet channel which define a housing chamber which houses the valve shutter and is in continuous fluid communication with the inlet channel. The ball shutter has a through channel with end openings having a different diameter as well as a third opening of a joining channel the axis of which is at right angle to the through channel and the joining channel opens out into the latter. Within the outlet channel the shutter is supported by an annular gasket whereas at the inlet side the shutter is supported by a springing insert which has apertures and causes turbulences in the flowing flow.

Abstract: A ball valve has two mutually orthogonal diametrical internal passages in one of which is mounted a pressure relief valve assembly for resisting sudden pressure flucutations in fluid flow during movement of the ball valve from an open to a closed position. The assembly has an adjustable biasing force to calibrate the valve.