Abstract: A hydraulic servo-actuated valve having a valve body, an actuator and a lid is provided. The valve body has a main opening and a clamping flange arranged around the main opening. The actuator has a central actuation region and a peripheral sealing band. The lid has a central portion and a counter-clamping flange. The valve has a composite actuating duct longitudinally extending between the clamping flange and the counter-clamping flange and the composite actuating duct is obtained by joining a first element and a second element.

Abstract: A hydraulic servo-actuated valve with a valve body having a first duct, a second duct, a main opening arranged on the valve body, an actuator arranged at the main opening and adapted to open and close the valve is provided. The valve has a lid arranged in an operative position on the valve body at the main opening, and the lid has a central zone concurring with the actuator to delimit an actuating chamber. The first duct has a first through-hole, and the lid has a second through-hole arranged in a position corresponding to the first through-hole, when the lid is arranged on the valve body in an operative position. The central zone of the lid also has a third through-hole. The lid has first connecting means adapted to allow a flanged and removable connection of a first operative member only to the lid, and the first connecting means is arranged near the second through-hole and the third through-hole.

Abstract: A hydraulic servo-actuated valve having a valve body, an actuator and a lid is provided. The valve body has a main opening and a clamping flange arranged around the main opening. The actuator has a central actuation region and a peripheral sealing band. The lid has a central portion and a counter-clamping flange. The valve has a composite actuating duct longitudinally extending between the clamping flange and the counter-clamping flange and the composite actuating duct is obtained by joining a first element and a second element.

Abstract: A hydraulic servo-actuated valve with a valve body having a first duct, a second duct, a main opening arranged on the valve body, an actuator arranged at the main opening and adapted to open and close the valve is provided. The valve has a lid arranged in an operative position on the valve body at the main opening, and the lid has a central zone concurring with the actuator to delimit an actuating chamber. The first duct has a first through-hole, and the lid has a second through-hole arranged in a position corresponding to the first through-hole, when the lid is arranged on the valve body in an operative position. The central zone of the lid also has a third through-hole. The lid has first connecting means adapted to allow a flanged and removable connection of a first operative member only to the lid, and the first connecting means is arranged near the second through-hole and the third through-hole.

Abstract: A single chamber two-way servo-operated valve includes: a valve body presenting an inlet aperture, an outlet aperture, and an access; a cover to close the access of the valve body; a port dividing the valve body interior into an inlet section and an outlet section; a valving element including a disc for closing the port; and an actuating chamber at least partially defined by the cover. The disc and a flexible diaphragm are connected to the valving element. The disc of the valving element includes a rigid central core which is at least partially covered by a rubber layer adhering to the central core. The rubber layer extends from the edge of the disc to form the flexible diaphragm.

Abstract: A multifunctional fluid shut-off device including an upstream shut-off element, a flow-rate limiter, and a downstream functional element. The upstream shut-off element presents a body in which at least one valve is disposed, and a downstream end includes an exit port to which the downstream functional element is operatively connected. At least one of the upstream shut-off element and the downstream functional element includes a retention mechanism for the flow-rate limiter. A unit including the downstream functional element is directly connected to the upstream shut-off element containing in its interior the flow-rate limiter.

Abstract: A mechanical meter for measuring the quantity of liquid flowing through a pipe (2), comprising an impeller (1) rotatably supported by a saddle (3) positionable on the outer surface of the pipe (2), in which the inner surface of the saddle (3) is arranged to abut, at least by a part thereof, directly against the outer surface of the pipe (2) such as to ensure the same penetration of the impeller (1) into the pipe (2) for each installation.

Abstract: A single chamber two-way servo-operated valve comprising: a valve body (1) presenting an inlet aperture (2), an outlet aperture (3) and an access (11); a cover (12) to close the access (11) of the valve body (1); a port (4) dividing the valve body interior into an inlet section (5) and an outlet section (6); a valving element (8) comprising a disc (10) for closing said port (4); and an actuating chamber (15) at least partially defined by the cover (12), the disc (10) and a flexible diaphragm (14) connected to the valving element (8), the disc (10) of said valving element (8) comprising a rigid central core (50) which is at least partially covered by a rubber layer (18) adhering to said central core (50), said rubber layer (18) extending from the edge of the disc (10) to form the flexible diaphragm (14).

Abstract: A mechanical meter for measuring the quantity of liquid flowing through a pipe (2), comprising an impeller (1) supported by a saddle (3) positionable on the outer surface of the pipe (2), in which the inner surface of the saddle (3) is arranged to abut, at least by a part thereof, directly against the outer surface of the pipe (2) such as to ensure the same penetration of the impeller (1) into the pipe (2) for each installation.

Abstract: A diaphragm valve having an inlet sleeve and an outlet sleeve that converge to a fluid flow chamber contains a valve seat engaged by an elastic diaphragm that is composed of a peripheral flange connected to a central dome-shaped part. The cross section of the two sleeves near the valve seat is flattened in the direction of flow and elongated in the direction transverse thereto, so to form a substantially elliptical port, corresponding to the dome of the diaphragm, which has the shape of a sector of an ellipsoid.

Abstract: A multifunctional fluid shut-off device including an upstream shut-off element, a flow-rate limiter, and a downstream functional element. The upstream shut-off element presents a body in which at least one valve is disposed, and a downstream end includes an exit port to which the downstream functional element is operatively connected. At least one of the upstream shut-off element and the downstream functional element includes a retention mechanism for the flow-rate limiter. A unit including the downstream functional element is directly connected to the upstream shut-off element containing in its interior the flow-rate limiter.

Abstract: A three-way valve for the passage of liquids has an inlet, an outlet and a drain. An inlet opening connects the inlet to the outlet, whereas a drain opening connects the outlet to the drain. The inlet and drain openings can be alternatively closed by two shutters, rigidly connected to a mobile shaft. The mobile shaft has a normal flow position, in which the drain opening is closed by the drain shutter, while the inlet opening is free and allows communication between the inlet and the outlet, or a drain position, in which the inlet opening is closed by the inlet shutter and the drain opening is free and allows communication between the outlet and the drain. The drain forms a single piece with the valve and the shaft has an extension, that slides in a bore guiding the shaft's movement and keeping it centered in the right position.

Abstract: A diaphragm valve (5 comprising a valve body (1 having an inlet sleeve (3) and an outlet sleeve (4) that converge to a fluid flow chamber containing a valve seat (106). and divided into two parts, one being integral with the valve body (1) and the other one consisting of a bonnet (2) sealably fitted onto the valve body (1). An elastic diaphragm (5) is provided having a peripheral flange (105) connected to a central dome-shaped part (305), which may be compressed against the valve seat (106), thereby preventing any fluid flow from the inlet sleeve (3) to the outlet sleeve (4). The cross section of the two sleeves (3, 4) near the valve seat (106) is flattened in the direction of flow and elongated in the direction transverse thereto, so to form a substantially elliptical port, whereas the dome (305) of the diaphragm (5) has the shape of a sector of an ellipsoid.