A powder feeding device, in particular for coating powder, is disclosed. The powder feeding device includes a dense phase powder pump which has at least one conveying chamber with a powder inlet valve and a powder outlet valve. Furthermore, a control device is provided for selectively operating the dense phase powder pump in a powder conveying more or a flushing operating mode. The powder inlet valve and the powder outlet valve of the dense phase powder pump are configured in each case as a pneumatically actuable compression valve which can be closed when an actuating pressure is applied. The control device is configured to set the pressure value of the actuating pressure which is selected for closing the powder inlet valve and/or powder outlet valve depending on the respective operating mode of the dense phase powder pump and/or depending on a pressure which prevails in the conveying chamber.

A valve is equipped with a displacement amount regulating mechanism (for example, flow rate control device). An abutment member of the displacement amount regulating mechanism protrudes inside a pilot chamber and faces an upper end surface of a valve main body portion of a valve element. When the valve element (the valve main body portion) is separated from a valve seat to bring the valve into an open state, the abutment member is brought into abutment on the upper end surface of the valve main body portion. This abutment regulates the displacement of the valve element.

A dual-adjustment flow limiting device includes an outer shell, an inner shell, a flow limiting member, and an adjustment mechanism. The outer shell defines a plurality of external ports. The inner shell defines a flow chamber and a plurality of internal ports communicating with the flow chamber and is fitted into the outer shell such that a communicating area is formed between the internal and external ports. The flow limiting member is disposed in the flow chamber of the inner shell and can be deformed in response to the pressure of a water flow entering the flow chamber to partially block the internal ports, so that the water flow entering the flow chamber can be restricted. The adjustment mechanism is provided at the outer and inner shells to adjust the communicating area, so that the water flow can be further restricted.

A pilot actuator for controlling the operation of a control valve. The control valve can be part of a dry-type fire suppression sprinkler system in which the sprinkler piping network is filled with pressurized gas such as, for example, air, nitrogen, or another gas. The pilot actuator is a differential valve that actuates the control valve when the gas pressure in the sprinkler piping network is at or below a value for tripping or actuating the pilot valve to the open position. The pilot actuator has a ratio of a change in a trip pressure set point to a change in an inlet pressure that is in a range of 0.007 to 0.045.

Device for limiting or keeping constant a quantity of fluid flowing therethrough, comprising: a housing which comprises a front chamber and a rear chamber, a partition arranged in the housing and provided with two or more openings; and a flow limiting element arranged in one or both openings, the flow limiting element comprises the following: a housing provided with an inlet, an outlet and a throughflow opening; and a resilient plate-like valve element which is mounted in the housing and which can substantially close the throughflow opening by resilient movement in the direction of a valve seat arranged in the housing adjacently of the throughflow opening, wherein the valve element is fixed on one side and the valve element can move resiliently on the opposite side in the direction of the valve seat. Mould for producing one or more injection-moulded products, wherein at least a part of the mould is movable and adjustable from the outer side such that the size and/or the shape of the mould cavity is adjustable. The injection moulded product is a flow limiter for limiting the force of the flow of a fluid flowing therethrough, comprising: a housing provided with an inlet, an outlet and a throughflow opening; and a resilient plate-like valve element which is mounted in the housing and which can substantially close the throughflow opening by resilient movement in the direction of a valve seat arranged adjacency of the throughflow opening in the housing, wherein the valve element is fixed on one side and the valve element can move resiliently on the opposite side in the direction of the valve seat.

A probe assembly for a closed transfer system is provided. The probe assembly includes a base having a base air inlet, a probe having a base end and a probe end, at least one primary valve positioned at the probe tip, and at least one secondary valve. The probe defines a hollow air channel extending from the base end to the probe end including a probe tip, the base end being coupled to the base such that the hollow air channel is in fluid communication with the base air inlet and the probe tip. The at least one secondary valve is positioned at the base air inlet and configured to selectively allow air into the hollow air channel.

A check valve, including a valve and a valve support surface, to permit a fluid to move through the check valve in a first direction and resist a fluid flow through the valve in a second direction, the valve having a valve diaphragm and an isolating bridge, with a portion of the valve engaging against valve support surface to resist deformation or stretching of the valve when a backflow of fluid into the check valve occurs. The valve support surface having a first surface portion and a second surface portion, and the valve positioned with the valve diaphragm spaced apart from the first surface portion, and the isolating bridge spaced apart from the second surface portion.

The flow rate control device includes a main plate corresponding to an inner diameter and including a through hole which is formed at the center thereof and through which a fluid flows, a sub-plate corresponding to a size of the through hole, disposed in front of the main plate, and applied with a pressure of the flowing fluid, and an expansion and contraction flow path formed to connect the through hole and a circumference of the sub-plate to each other and expanded and contracted by the pressure applied to the sub-plate. The expansion and contraction flow path includes a plurality of holes which are formed in a side surface thereof and through which the flow flows, and has a cross-sectional area changed by the pressure to control a flow rate.

Disclosed is a flow rate controller in which a clear width (6) of a control gap (4) between a main part (3) and a control element (2), which is deformable according to the pressure in order for the flow rate through the control gap (4) to be kept constant, can be adjusted as a result of the fact that at least one supporting element that adjusts the clear width (6) of the control gap (4) is designed to be movable relative to a main part (3).

A damper including inner and outer tubes and a control valve. A piston is slidably disposed within the inner tube to define first and second working chambers. An intermediate member assembly is disposed annularly about the inner tube. An intermediate channel is positioned radially between the intermediate member assembly and the inner tube and a reservoir channel is positioned radially between the intermediate member assembly and the outer tube. A first unidirectional blocking valve forms a first partition between first and second intermediate channel portions of the intermediate channel. A second unidirectional blocking valve forms a second partition between the second intermediate channel portion and a third intermediate channel portion. An external control valve has a control valve inlet that is arranged in fluid communication with the second intermediate channel portion.