Abstract: A valve assembly comprising a rotary closure element which defines an axis of rotation and is selectively movable between a fully open position and a fully closed position. Mounted to and movable with the rotary closure element is an impedance assembly. The impedance assembly defines an inflow end and an outflow end, and comprises a plurality of fluid passageways which extend from the inflow end to the outflow end. Also partially defined by the impedance assembly is a flow opening which extends from the inflow end to the outflow end. The fluid passageways and the flow opening are oriented relative to each other such that a portion of a flow through the valve assembly is directed into the fluid passageways and a portion of the flow is directed through the flow opening when the closure element is in the fully open position.

Abstract: A supercharger includes multiple back flow ports which are controlled by valves. The valves regulate the timing and area for back flow of pressurized outlet air into the rotor chambers. The back flow air tends to equalize air pressure in the chambers prior to their exhausting into the outlet and thereby reduces flow back noise. The multiple ports are opened selectively or sequentially to provide noise control with improved efficiency at varying speeds.

Abstract: A valve assembly comprising a rotary closure element which defines an axis of rotation and is selectively movable between a fully open position and a fully closed position. Mounted to and movable with the rotary closure element is an impedance assembly. The impedance assembly defines an inflow end and an outflow end, and comprises a plurality of fluid passageways of varying noise attenuating capability which extend from the inflow end to the outflow end. Also partially defined by the impedance assembly is a flow opening which extends from the inflow end to the outflow end.

Abstract: An integrated multipurpose valve is a valve in which more than one type of valves are integrated in a cage held permanently in the pipeline, and the valve as a while can perform multiple functions which allow it to be a shut off valve, a pressure reducing valve, a pressure relief valve and a check valve, and a multi-diversion valve which can divert fluid flow in several directions. The inner components of the valve can be inspected and replaced without removing the valve as a whole from the line.

Abstract: A high-speed, high pressure rotary valve is provided comprising a valve body, a valve element which includes a plurality of passageways therethrough that is configured to be rotatably disposed within the valve body, and means for rotating the valve element within the valve body whereby a single rotation of the valve element results in the creation of multiple discrete flow paths through the rotary valve and multiple valve actuation cycles.

Abstract: A slotted spool valve for a speed control apparatus offering rapid response to prevent speed searching and cogging at low speed settings. Round port spool valve arrangements are replaced with a valve arrangement having rectangular-shaped ports. Response of the rectangular-shaped ports provides for rapid and sufficient fluid flow or bypass with less movement of a control shaft than that required for use with round port spool valve arrangements.

Abstract: An isolation valve assembly for use in a pipeline comprises a valve housing (1) body having inlet (12) and outlet (13) openings. In the housing there is disposed a pair of independently operable rotary valve balls (3) each having a port (25) therethrough. The valve balls (3) are each rotatable between an open position in which the respective port is in communication with the adjacent opening and a closed position in which the valve ball closes the adjacent opening. A valve seat (9, 14) supports each valve ball in the housing and a valve seat retention member (10) is disposed in each of the openings (5). The retention member (10) defines a flow passage (11) therethrough for communication with the adjacent valve ball port and has a first end proximal to one of the valve balls. The first end supports said valve seat and a second end has means for engagement to the pipeline. The arrangement allow a relatively large bore valve assembly to have a length conforming to International Standard ANSI B16.

Abstract: Disclosed is a blowdown valve for a boiler system for removing fluid that contains debris. The blowdown valve comprises a housing for a shutoff valve and a reversible throttle valve. The shutoff valve is fluidly connected to a fluid inlet that, in turn, is connected to the boiler system. Each one of the shutoff and throttle valves includes a rotatable valve ball having a bore formed therethrough. Rotation of the valve ball alternately blocks and unblocks fluid flowing therethrough. The throttle valve bore includes first and second bore ends. A bore insert is disposed within the bore between first and second debris zones. The bore insert includes passages configured for reducing fluid energy. The first and second debris zones entrap debris therewithin. The throttle valve reverses positions of the first and second debris zones such that entrapped debris may be flushed out of the fluid outlet.

Abstract: A fitting, particularly a tap cock, for receptacles such as tank trucks or containers, which includes a housing (2), having an inlet opening (12) and an outlet opening (14), and a rotatable body (4) with a through passageway (48), having an inflow opening (50) and an outflow opening (52). The rotatable body (4) is rotatably disposed in the housing such that when rotated into an open position it facilitates fluid communication between the inlet opening (12) and the outlet opening (14) and when rotated into a closed position, it shuts off such communication. The fitting of the invention enables a large throughput during loading and unloading of the receptacle with little structural change by providing the rotatable body (4) with a second inflow opening (54) having a cross-section at least approximately the same size as the first inflow opening (50), and by providing the housing (2) with a bearing ring (46) or a seat ring (82) in the vicinity of the second inflow opening (54).

Abstract: A valve assembly comprising a rotary closure element which defines an axis of rotation and is selectively movable between a fully open position and a fully closed position. Mounted to and movable with the rotary closure element is an impedance assembly. The impedance assembly defines an inflow end and an outflow end, and comprises a plurality of tortuous passageways which extend from the inflow end to the outflow end. Also fully or partially defined by the impedance assembly is an enlarged flow opening which extends from the inflow end to the outflow end. The tortuous passageways and the flow opening are oriented relative to each other such that a portion of a flow through the valve assembly is directed into the tortuous passageways and a portion of the flow is directed through the flow opening when the closure element is in the fully open position.

Abstract: The present finding relates to a bidirectional ball valve usable particularly for ecological frigorific gases, which has a valve body housing a ball shutter connected to a control rod sealingly protruding from said valve body. The peculiarity of the finding is in that the ball shutter is turnable by 180° and is provided with a through hole on the side surface, and in the closing step can be arranged in the incoming flow direction.

Abstract: A damper including a pair of damper members movable with respect to each other is disclosed. Each damper member has at least one wall correspondingly inclined to an axis of the damper. The inclined walls are relatively movable between open and closed positions. The walls include plural apertures separated by imperforate portions. The apertures in each wall are disposed such that the apertures of one of the damper members are at least partially blocked by the imperforate portions of the other damper member when the inclined walls are in the closed position.

Abstract: A cage-type valve having a straight through flow path designed to utilize a variety of linear and rotary actuated plugs for the control of fluids. From the outside, the valve looks like a plug valve, but on the inside it has a multi-ported cage with a plug moveably positioned about it, so that actuation of its plug controls the flow of fluid through the multiple ports of the cage, controlling the flow of fluid through the valve.

Abstract: A fluid flow rate switching device providing a plurality of precise user selectable flow rates. Generally, the device includes a housing having a port and a plurality of passages. Respectively disposed in each of the passages is a rigid capillary tube for regulating the flow rate of a therapeutic fluid through the passages. Further, a valve is rotatably connected to the housing for operably connecting and disconnecting the port from one or more of the passages.

Abstract: A protective device for a hydraulic system includes a block which forms a housing with at least one fluid flow inlet into the housing and at least one fluid flow outlet. A plurality of fluid flow channels within the housing connect the inlet and the outlet. Each of the fluid flow channels contain a hydraulic fuse adapted to close its associated fluid flow channel when a selected flow rate of hydraulic fluid is exceeded, each of the fuses having a different selected fluid flow rate which causes closure thereof. A valve in each of the fluid flow channels provides for selectively opening and closing the fluid flow channels so that a selected one of the channels is open and all others of the channels are closed. The valves may be integral with single rotatable valve stems, or of various alternative designs, for example, maunually, mechanically or electronically controlled valves.