摘要:
A magnetically operated flow detector for liquids comprises a housing (11;30) inside which a piston (14) is movable due to the flow of the liquid to be detected, a permanent magnet (16) disposed inside said housing (11) and a magnetic sensor (19;32) disposed outside said housing and adapted to be actuated by the magnetic field of said permanent magnet (16). The permanent magnet (16) has a toroidal shape and is mounted at a fixed location, whereas the piston (14) carries a cylinder (18) of a magnetic material disposed inside the magnet, that offers a lower reluctance path to the field lines of said magnet (16). The device can be integrated in a hydraulic group for system supplying both heating and sanitary hot water, comprising a three-way valve controlled by a linear electric actuator.
摘要:
5 n7 A valve assembly for a combined plants adapted for providing both heating and sanitary hot water comprising a gas-fired boiler (1), a heat exchanger (2), a water/water heat exchanger (17) that can be included through a three-way valve (4) in the circuit of the heating water, at least one radiator (R), and a pump (P) for circulating the heating water, such assembly being formed by two sub-assemblies or valve units. The first unit (I) comprises an integral metal block in which there are formed or mounted said three-way valve (4), a pipe fitting (3) for the connection with the main heat exchanger (2), a fitting (5) for the connection with the radiator (R), an outlet fitting (9) for the domestic water, two pipe fittings (22, 23) for the connection with the water/water heat exchanger (17), a pressure switch (15) and a by-pass valve (16) with an associated outlet fitting (10). The second unit (II) comprises an integral metal block in which there are formed or mounted a pressure difference device (14), a pipe fitting (6) for the connection with the radiator (R), an inlet fitting (8) for the domestic water, an outlet fitting (7) towards the pump (P), two fittings (32, 3) for the connection with said water/water heat exchanger (17).
摘要:
5 n7 A valve assembly for a combined plants adapted for providing both heating and sanitary hot water comprising a gas-fired boiler (1), a heat exchanger (2), a water/water heat exchanger (17) that can be included through a three-way valve (4) in the circuit of the heating water, at least one radiator (R), and a pump (P) for circulating the heating water, such assembly being formed by two sub-assemblies or valve units. The first unit (I) comprises an integral metal block in which there are formed or mounted said three-way valve (4), a pipe fitting (3) for the connection with the main heat exchanger (2), a fitting (5) for the connection with the radiator (R), an outlet fitting (9) for the domestic water, two pipe fittings (22, 23) for the connection with the water/water heat exchanger (17), a pressure switch (15) and a by-pass valve (16) with an associated outlet fitting (10). The second unit (II) comprises an integral metal block in which there are formed or mounted a pressure difference device (14), a pipe fitting (6) for the connection with the radiator (R), an inlet fitting (8) for the domestic water, an outlet fitting (7) towards the pump (P), two fittings (32, 3) for the connection with said water/water heat exchanger (17).
摘要:
A hydraulic assembly for a heating system also supplying sanitary water and equipped with a hot water tank (3). The assembly comprises a block (10) in which there are formed the seats for the a three-way valve (45) and for an electric linear actuator (27) controlled by a thermostat (36) housed in the tank (4). The three-way valve can compensate a possible excessive length of the stroke of the linear actuator.
摘要:
A valve assembly for a combined plant for providing both heating and sanitary hot water, comprising a gas burner (1), a main gas/water heat exchanger (2), a water/water heat exchanger (17) connectable through a three-way valve (4) in the circuit of the heating water, at least a radiator (R), and a pump (P) for circulating the heating water. The assembly is made up by two sub-assemblies or valve units (I, II) both formed of a composite plastic material, with the second sub-assembly (II) incorporating said pump (P).
摘要:
A three-way valve for use with boilers adapted to supply both heating hot water and domestic hot water, comprising an upper portion (20) and a lower portion (30) coupled together through a threaded section (33) and sealing members (35A, 35B) so as to allow for a relative rotation thereof. The upper portion (20) comprises an output duct (4) in communication with a heat exchanger (11), and an axially movable stem (16) carrying at one end thereof a double plug (17) and at the other end an assembly made up by a rigid dividing wall (7) and a flexible diaphragm (6), with a helical spring (19) axially acting on said stem (16), whereas the lower portion (30) comprises a chamber (13) in communication with two output ducts (2, 3) and within which the double plug (17) is movable. The valve can further comprise a combined device performing both the flow control function (in case of lack of water in the plant) and that of automatic bypass in case of excessive loss of pressure in the plant.
摘要:
A three-way valve for use with boilers adapted to supply both heating hot water and domestic hot water, comprising an upper portion (20) and a lower portion (30) coupled together through a threaded section (33) and sealing members (35A, 35B) so as to allow for a relative rotation thereof. The upper portion (20) comprises an output duct (4) in communication with a heat exchanger (11), and an axially movable stem (16) carrying at one end thereof a double plug (17) and at the other end an assembly made up by a rigid dividing wall (7) and a flexible diaphragm (6), with a helical spring (19) axially acting on said stem (16), whereas the lower portion (30) comprises a chamber (13) in communication with two output ducts (2, 3) and within which the double plug (17) is movable. The valve can further comprise a combined device performing both the flow control function (in case of lack of water in the plant) and that of automatic bypass in case of excessive loss of pressure in the plant.