In a register, a ventilation passage is provided inside a retainer so as to communicate with an air outlet of a bezel, and inside the air outlet, a front movable louver and a rear movable louver constituting a cross fin type register are provided by disposing fins orthogonal to each other. On an edge portion on an upstream side of the fin, a serrated portion including a large number of juxtaposed serrations is formed, and all angle portions forming outlines of all serrations are roundly chamfered to form chamfered portions on the entire outlines,

A pressure control valve may include a valve body, a fixed cylinder and a rotating cylinder. The valve body may have an inlet port and an outlet port. The fixed cylinder may be fixed to an inner wall of the valve body. The fixed cylinder may include a quadrangular first fixed hole connected to the inlet port, and a quadrangular second fixed hole connected to the outlet port. The rotating cylinder may be rotatably arranged in the fixed cylinder. The rotating cylinder may include a quadrangular first pressure control hole selectively connected to the first fixed hole, and a quadrangular second pressure control hole selectively connected to the second fixed hole. Thus, the pressure control valve including the quadrangular fixed hole and the quadrangular pressure control hole may have improved pressure control function.

The present invention relates to a valve for inflatable apparatuses. The valve comprises a housing, a sealing disc and a handle. The handle is coupled to the sealing disc, and is adapted for rotating the sealing disc within the housing.

The object of the invention is a floating split butterfly valve that allows connection of two processing devices or containers in a way that one of the devices (e. g. a transport device or a container) is closed by one half of the valve (passive part) while the other device (e. g. a stable device or a container) is closed by another half of the valve (active part), wherein the material (powder and/or liquid substance) transferred from one device/container into another device/container cannot get trapped in dead corners of the valve and does not get accumulated in the equipment. The construction of the floating split butterfly valve of the invention provides for the fact that due to the arrangement of shafts (5, 5a) of split flaps (2, 2a) in a housing of an active and a passive part of the valve via displaceable (floating) hinges (3, 3a), seals (1, 1a) of the active and passive parts of the valve are flush with the level of the split flaps (2, 2a) on the active and passive parts, when the valve is in a closed position, while the seals (1, 1a), while in an opened position, are arranged by a distance X higher than valve housings (4, 4a) and the flaps (2, 2a) and the seals (1, 1a) remain on the same level due to clearance S1=X.

An airflow control valve structure includes a metallic pivot shaft- and a valve body. The valve body includes a connection portion connected to the pivot shaft and a resin valve portion. The pivot shaft includes first and second pivot shaft side press-fit portions. The connection portion includes a first valve side press-fit portion formed integrally with the valve portion and a metallic fitting member including a second valve side press-fit portion. The first valve side press-fit portion is fitted to the first pivot shaft side press-fit portion at an angular position at which a phase of the valve portion is matched with a phase of the pivot shaft. The second valve side press-fit portion is fitted to the second pivot shaft side press-fit portion. The first pivot shaft side press-fit portion is longer than the second valve side press-fit portion.

A ventilation valve, comprising a cylindrical valve body (1), a gear box (2), a plurality of fan-shaped vanes (3) and a drive device (4), the gear box (2) being arranged in the center of the valve body (1), and a geared mechanism being provided inside the gear box (2). The drive device (4), by means of a geared drive mechanism, cause the vanes (3) to rotate in a same direction, each around its own central shaft; the vanes (3) are arranged within the valve body (1) in a uniform distribution; the geared mechanism comprises a first central gear (23) and a second central gear (24) fitted on a same supporting shaft (25); between the first central gear (23) and the second central gear (24) are provided a plurality of gears, one each of which is arranged at the end of one of said central shafts which extends to within the gear box (2), each of said gears engaging with both said first central gear (23) and said second central gear (24). Also arranged within the valve body (1) is one or a plurality of airflow meters (6), the distance between the central axis of each of said one or plurality of airflow meters (6) and the central axis of the valve body (1) is different. The present ventilation valve precisely controls airflow and is safe and reliable, while featuring improved geared mechanism security and reduced wear and tear, thus prolongs the service life of the ventilation valve.

A multi-blade dosing valve comprising the following elements: a valve body provided with a central opening; a plurality of shafts, each provided with a respective blade, which extend transversely to the central opening; the blades being able to close, at least partially, the central opening; a motor unit which causes the opening/closing of the blades; and vibrators to set in vibration the shafts and the blades. The multi-blade dosing valve comprises an independent vibrator for each shaft.

Valve assemblies with butterfly valves for use as a double isolation & bleed (DIB) valve and a double block & bleed (DBB) valve. The embodiments may have a twin-disc design with a non-separable, valve body having a central bore. A pair of butterfly valves may reside in the central bore, each having an annular seal and a rotatable disc that contacts the annular seal to prevent flow of fluid into space between the butterfly valves. Implementations of the embodiments configure the annular seal with a sloped contact surface at an angle to positively seal the rotatable discs in the preferred direction of incoming flow. In this way, the valves can always close in response to either uni-directional flow into one end of the central bore or bi-directional flow into both ends of the central bore, respectively or simultaneously.

A pool wave generator having a pool area and a plurality of chambers for generating a wave in the pool area. Exemplary embodiments include using exhaust valves in each chamber to control the performance of fans. Measuring the power consumed by the fans in real time allows determination of the amount of air to be evacuated from the pneumatic system (and thus an opening angle of the exhaust valves) so that the fans operate at maximum efficiency and with less instability. In an exemplary embodiment, a valve mounted on the fan inlet allows the incoming air flow to be controlled, thereby allow the motors to continue rotating at a given speed with little or no energy consumption when the valve is partially or fully closed.

A pool wave generator having a pool area and a plurality of chambers for generating a wave in the pool area. Exemplary embodiments include using exhaust valves in each chamber to control the performance of fans. Measuring the power consumed by the fans in real time allows determination of the amount of air to be evacuated from the pneumatic system (and thus an opening angle of the exhaust valves) so that the fans operate at maximum efficiency and with less instability. In an exemplary embodiment, a valve mounted on the fan inlet allows the incoming air flow to be controlled, thereby allow the motors to continue rotating at a given speed with little or no energy consumption when the valve is partially or fully closed.