Abstract:
Regulating insert, chiefly for insertion in a valve housing or the like in a flowing medium, comprising a pre-setting for regulation and/or setting of amounts of liquid in installations with flowing media for the limitation of the medium to a pre-set maximum amount, independently of a differential pressure working across the valve, said insert further comprising a tubular regulating element which is displaceable in a housing (3) in the longitudinal direction of the regulating insert, and lies up against a spring element (13) so that upon displacement the tubular regulating element (2) respectively opens or closes a number of openings (9) in the housing (3), where said tubular regulating element (2) is influenced for regulation by a membrane, where the membrane (14) is a roller membrane, said roller membrane (14) being fastened along an outer diameter to the inner side of the housing (3) and along an inner diameter is fastened to the outer surface of the regulating element (2), so that the resulting forces stemming from the differential pressure across the membrane (14) lie on the same cylinder surface as that which extends through a slide surface (12) between the largest diameter of the regulating element (2) and the smallest diameter of the housing (3).
Abstract:
Heat exchanger valve (8) with thermostat valve (12), a housing (9) with inlet (15) and outlet (16), a thermostat bellows displaceable spindle (42) with a seal (32) which, against the pressure of a spring (43) surrounding the spindle (42), closes/opens an opening (28) in a transverse wall (29) in the housing (9) between the inlet (15) and the outlet (16), and a membrane (17, 21) controlled by the differential pressure for the control of a heat-carrying medium between the inlet (15) and the outlet (16), and an adjustable closing element (11) between the inlet (15) and the membrane (17, 21), the thermostat valve (12) being able to shut off the flow between the inlet (15) and the outlet (16) independently of the closing element (11). With the valve (8), only a predetermined maximum amount of the medium flows through the heat exchangers (5). If the differential pressure increases upon the closing of one of more valves on a pipe length, the flow in the individual heat exchanger (5) is not increased.
Abstract:
Heat exchanger valve (8) with thermostat valve (12), a housing (9) with inlet (20) and outlet (21), a thermostat bellows displaceable spindle (30) with seal (42) which, by the expansion/contraction of the thermostat bellows and against the pressure of a surrounding spring (31), can close/open an opening (27) with a seating (27a) in a transverse wall (24) between the inlet (20) and the outlet (21), and a piston (13) controlled by differential pressure for the control of a medium's differential pressure across a pre-setting (11) and a thermostat valve (12) consisting of the seating (27a) and the seal (42) between the inlet (20) and the piston (13), the thermostat valve (12) being able to cut off the flow between the inlet and the outlet independently of the pre-setting (11). With the valve (8), only a predetermined maximum amount of the heat-carrying medium flows through the heat exchangers (5). If the differential pressure is increased when the valves on a pipe length are closed, the flow in the individual heat exchangers (5) is not increased.
Abstract:
The invention relates to a method for regulating a central heating plant for several rooms having a radiator (5) provided with a thermostat valve (6). The plant has a differential pressure valve (11, 111) placed downstream as compared to the radiators, with a closing device controlled by a membrane (23) for regulating the flow of heat carrying fluid in a passage (19) between an inlet (17) and an outlet (18). If the windows in several rooms are opened the thermostat valves (6) will open, whereupon the differential pressure valve should regulate the combined flow, which it cannot do since the pressure difference across the two surfaces of the membrane (23) is small even by full flow. This drawback is avoided by means of a differential pressure valve (11, 111) with an adjustable throttle (15) between the inlet (17) and the closing device (24, 25), and by adjusting the throttle, regardless of the pressure distribution, to allow the maximum amount of fluid to pass. The invention also relates to a single pipe and a double pipe central heating plant with the differential pressure valve (11, 111).