Abstract: Disclosed are a method and a device for suppressing vibrations (18) in an installation comprising an actuator (14) for actuating a flap (12) or a valve (70) used for metering a gas or liquid volume flow (16), especially in the area of HVAC, fire protection, or smoke protection. Vibrations (18) of the flap (12) or valve (70) caused by an unfavorable or wrong adjustment or configuration of the controller and/or by disruptive influences are detected and dampened or suppressed by means of an algorithm (1) that is stored in a microprocessor (49). Said algorithm is preferably based on the components recognition of vibrations (46), adaptive filtering (48), and recognition of sudden load variations (50).

Abstract: The invention relates to a flow restrictor (1) for restricting a volume flow through a liquid line, said flow restrictor comprising a support (10) having a passage and a bent flat spring (11) attached to the support (10). The flat spring (11) comprises at least one spring tab (12) and the passage at least one opening (13), the spring tab (12) and the opening (13) having a substantially identical extension along a longitudinal direction. The spring tab (12) is designed and arranged above the opening (13) in such a manner that it increasingly rests against the support (10) with increasing differential pressure, thereby gradually making the opening (13) smaller and continuously reducing the passage within a defined pressure range. The dimensions of the opening (13) are adjusted corresponding to the size of the spring tab (12), thereby allowing a compact flow restrictor (1) which is less susceptible to dirt.

Abstract: An actuator (1) comprises an electrical motor (10) for driving a damper (3) from a rest position to a stalled position. The damper (3) is biased toward the rest position with at least one spring. A control module (2) is configured to supply, upon activation of the actuator (1), a drive current to the electrical motor (10) for driving the damper (3) from the rest position to the stalled position against a bias force produced by the spring. The control module (2) is further configured to reduce the drive current to a lower level for maintaining the damper (3) in the stalled position when a defined duration of time has elapsed since activation of the actuator (1). Damages to the electrical motor (10) and/or gear trains can be avoided without having to provide any circuitry or sensory equipment for measuring the drive current.

Abstract: A flow setting assembly is provided to permit field adjustment of an electronically actuated flow control valve, particularly a pressure independent characterized control valve (PICCV). In a preferred form, flow can be field adjusted by using a hex tool. Therefore, the maximum flow can be increased or decreased within the valve's adjustable flow range. As with all high close-off valves that employ a ball in their design, the ball passes well into the seat when rotated to the actuator's zero-degree position. Therefore, there is an amount of travel within the first degrees of ball rotation that passes back over this seat. The flow setting assembly eliminates this excess rotation (12°) resulting in a closed position that is offset to improve control resolution and system accuracy. This offset continues to allow the high close-off rating of 200 PSI. MFT actuators electronically adjust to and maintain the 2-10 Volt control signal at the reduced angle, as well as the 100 second running time and feedback signal.

Abstract: In an air conditioning economizer system outdoor air intake is reduced automatically by a control device based on a shut-off control setting for a measured outdoor air quality. A geographical location associated with the air conditioning economizer system is received (S2) in the control device. The control device defines automatically (S3) the shut-off control setting based on the geographical location. Thus, the air conditioning economizer system is adapted specifically for a geographic location and its climate zone, without the requirement for installing or operating personnel to determine a shut-off control setting for a specific climate zone and/or select a corresponding operating range.

Abstract: The invention relates to a device (12), for controlling an airflow (A) in a ventilation duct (10), comprising a least one pivotable air flap (24), which prevents an airflow (A) in the duct (10) when in the closed position. A housing (32) of an actuator for the air flap (24), which may pivot freely about the relevant longitudinal mid plane (LM), is mounted in the inner duct wall (34) of constant cross-section. The elastic air flap (24), symmetrically or approximately symmetrically curved about the longitudinal mid plane (LM) of the ventilation duct (10) and supported under load in a stable position on the duct wall (34), is rigidly fixed to the driveshaft (18) of the actuator, by an angled lever arm (20), with a separation (a), in the region of the apex line (S) thereof.

Abstract: The invention relates to a drive system (A) for a fire protection flap (8) arranged in a ventilation duct (9). Said drive system (A) comprises at least one drive element (1), an energy supply element (2) for supplying energy to the drive element (1) and a mechanical load-torque lock (3) for absorbing a torque acting on the fire protection flap (8). The drive element (1) is made essentially of plastic. A thermal protection element (4) is at least arranged on the side of the drive element (1) which faces the ventilation duct (9).

Abstract: A safety drive unit (10) with a safety circuit (12) resets a flap or a valve into a specified safety position for controlling a gas or liquid volumetric flow, in particular in the field of heating, ventilation, and air conditioning (HVAC) fire protection and monitoring systems. The safety drive unit (10) essentially comprises an actuator (14) with a controllable electric motor (28), a capacitive energy storage unit (20), an energy converter (22) with a power module, and a power supply (18). During normal operation, the electric current in the power module of the energy converter (22) is converted to a lower voltage and stored in the capacitive energy storage unit (20) with at least one double-layer capacitor. If the voltage drops below a predetermined value or if there is a power failure, the stored electrical charge is converted back to a higher voltage by the same power module, and the electric motor (28) is activated until the specified safety position is reached.

Abstract: The invention relates to an actuator (16) with a prestressed reduction gear (10), which acts via a drive organ (12), particularly in the form of a drive segment, of a linear drive or a drive spindle upon an actuator for regulating a gas or fluid flow, particularly in the fields of heating ventilation, air-conditioning and fire and smoke protection. The actuating movement is limited by end stops (34). At least one inner end stop (34) on the housing side limits the rotational freedom of an end wheel (32). which is in a positive fit with the drive organ (12), up to more than a full rotation. In a prestressed reduction gear (10), a switching device can comprise two spur gears (52, 54) which have identical diameter and can be driven in the opposite direction for changing the direction of movement of the drive organ (12), each of which have a pinion (50, 58) which can be displaced in the axial direction. Said pinions are in each axial position in a positive fit with the drive organ (12).

Abstract: The invention relates to reduction gearing (10) for an electrically driven actuator for controlling a gaseous or liquid volumetric flow (98), in particular in the fields of heating, ventilation and air conditioning technology and fire and smoke protection, said reduction gearing (10) being modular. Said gearing consists essentially of primary gearing (12) containing at least one drive motor (20) and secondary gearing (14) with a power take-off (36). In addition, a self-limiter (16) is integrated into the primary gearing (12). The gearing modules (12, 14) are detachably interconnected, in particular various secondary gearing mechanisms (14) can be used for the primary gearing (12). The inventive reduction gearing (10) is advantageously complemented in particular by a modular actuator comprising a modular housing, a modular electronics system (38), a sensor and COM module and a coupling module (28).

Abstract: Disclosed are a method and a device for suppressing vibrations (18) in an installation comprising an actuator (14) for actuating a flap (12) or a valve (70) used for metering a gas or liquid volume flow (16), especially in the area of HVAC, fire protection, or smoke protection. Vibrations (18) of the flap (12) or valve (70) caused by an unfavorable or wrong adjustment or configuration of the controller and/or by disruptive influences are detected and dampened or suppressed by means of an algorithm (1) that is stored in a microprocessor (49). Said algorithm is preferably based on the components recognition of vibrations (46), adaptive filtering (48), and recognition of sudden load variations (50).

Abstract: An anti-twist device retains an actuating motor (10), which is placed in a force-fitting and/or form-fitting manner onto the projecting driveshaft (22) of a pivotable shut-off flap (62) of a gas transport tube (34), in particular of an HVAC tube or flue gas tube for a building, in a longitudinally moveable manner. Arranged at an adjustable axial distance (a) from the driveshaft (22) is at least one clamp (36) which secures the actuating motor (10). The parallel limbs (46) of the preferably substantially U-shaped clamp (36) are of resilient design, wherein in each case one end-side, inwardly projecting latching lug (48) is formed for holding down the actuating motor (10).

Abstract: According to the invention, a DC-motor (46) actuates a highly reduced reduction gear of an actuating drive for a flap or for a valve in order to regulate a gas or liquid volume flow, in particular in the field of heating/ventilation/climatisation, or fire or room protection. The electric flow of current in the stator coils (A, B, C) is commutated in a program-controlled manner without integrated position sensors. The rotations of the rotor (54) of the DC-motor (46) can be counted by means of special algorithms. Problems related to the principle of motor rotation speed of less than approximately 200 rpm are prevented.

Abstract: A two-way ball valve (10) for liquid and/or gas flowing media, essentially comprises a valve fitting (12) made up of two connected housing parts (22, 28), in which a ball (18) with a drilling (20) for the media flow and an operating shaft (68) running perpendicular to the drilling (20) is mounted such as to be able to rotate. Furthermore, sealing shells (40, 42) are arranged to both sides of the ball (18) respectively, coaxial to the longitudinal axis (L) of the valve fitting (12), which enclose the ball (18) and completely fill the dead volume (38) between the valve fitting (12) and the ball (18). Said sealing half-shells (40, 42) have a front opening for the operating shaft (38) in the axial direction (L), corresponding to the cross section of the drilling (20) in the ball (18). The sealing half-shells (40, 42) only contact the ball (18) in the region of the front openings thereof, between which a narrow sickle-shaped annular gap is formed.

Abstract: An actuator (10) and adapter (16,116), in particular with an electric motor (60), and a highly reduced gearing (48), is used for transmitting a torque to a continuous drive shaft (24) of at least one flap or at least one valve to control a gas or liquid volume flow. The adapter (16,116) which is used in particular in the sector of heating/ventilation/air-conditioning (HVAC), fire and space protection can be fitted in a manner which is locked against rotation in the radial direction to a frame or support of the actuated member. With the drive shaft (24,124) it forms a releasable frictional and/or positive connection. The actuator is preferably actuated by an electric actuator motor but also pneumatically, hydraulically or manually. The actuator (10) and adapter (16,116) can optionally be used as a bridging drive.

Abstract: The invention relates to an actuator (10) for actuating a device in a linear manner by means of a tangential rod which can be displaced in a longitudinal manner by converting the torque of a motor-driven pinion (32), in particular for a flap or for a valve in the field of heating-ventilation-climatisation (HLK), or fire and smoke protection. According to the invention, a normal threaded rod (24) which can be displaced in the axial direction thereof (L) and which can be cut to an individual length, has a radius (r) which is rotationally secured in the actuator (10). The pinion (32) in connected in a positive fit to at least one drive wheel (36) which is mounted in a freely rotational manner, and an elastic and/or adjustable pressure element (38, 54, 64, 66) which carry out a play-free engagement of drive wheels (36) and the normal threaded rod (24).

Abstract: Valves, particularly useful for controlling flow of heat transfer fluids in various heating, air conditioning and ventilation systems, are provided. The valves are of the curtain valve type and operate at very low torque and provide easy assembly and repair. The valve or actuator has an adjustment for the flow coefficient. A disclosed valve comprises a valve body having an inside surface, an inlet port comprised of an opening through the inside surface and enabling fluid flow into the valve body, an outlet port comprised of an opening through the inside surface and enabling fluid flow from the valve body, and a curtain valve closure. The closure adjustably controls fluid flow through the outlet port and is of a modular design including a flexible diaphragm held in an insert positioned at least partially within the outlet port. The insert has at least one dimension larger than a mating surface on the internal surface of the valve body.

Abstract: A valve connected to a fluid pipe line and having a valve chamber and at least one inlet port (3) and one outlet port (4), the valve comprising a ball (5) mounted in the valve chamber between a pair of seats (8, 9), and having an exterior surface and two ends and a fluid passageway extending between the two ends, the ball (5) is turned by a stem (6) for selective adjustment between an open and a closed position, with the ball (5) and stem (6) having an axis of rotation perpendicular to the centerline between the inlet (3) and outlet (4) ports, and the ball (5) having the centerline for its fluid flow passageway at an angle different from perpendicular to the axis of rotation of the ball (5).

Abstract: Simple APCV, ADPCV and PICV's are provided. The APCV's are referenced to the atmosphere and control the gauge pressure, either upstream or downstream. The ADPCV's are the same as the APCV's, differing in that they are not referenced to the atmosphere. They are instead referenced to a second point in the fluid flow system and control the differential pressure. The PICV's are control valves connected in series with ADPCV's and control the fluid flow rate through the valve independently of variations in the line pressure. A preferred APCV has a valve body (1) with connections for a single-phase fluid line and a flow passage between the inlet (2) and the outlet (3) of said fluid line, with an opening having a defined seat orifice (7) intersecting the flow passage. A moveable assembly, comprising a disk (5) or cup is connected to a pressure sensing member (4), having essentially the same effective surface area.