A connection system, in particular for a pressure reducer of a diving regulator, the system comprising a connector (1) having a first end (2) adapted to be fastened to a pressure reducer and a second end (2) adapted to be fastened to a valve of a compressed air cylinder, said connector (1) having an internal passage (4) extending substantially axially between said first and second ends, said internal passage (4) including a filter (5), preferably made of sintered stainless steel, and a retaining member (6a; 6b; 6c; 6c; 6d; 6e) fastened to said second end (2) and supporting firstly said filter (5) and secondly a main O-ring (7; 9e), said retaining member (6a; 6b; 6c; 6c; 6d; 6e) forming an inlet opening, said system including a shutter device comprising a shutter member (9a; 9b; 9c: 9c; 9d; 9e) that is deformable and/or movable between a shut position in which it shuts said inlet opening, and an open position in which it does not shut said inlet opening, said shutter member (9a; 9b; 9c: 9c; 9d; 9e) being urged resiliently towards its shut position and being deformed and/or shifted towards its open position by compressed air coming from said compressed air cylinder, said shutter member (9a; 9b; 9c: 9c; 9d; 9e) being deformed and/or shifted towards its open position in a direction extending substantially transversely relative to the flow direction of the compressed air stream.

A pressure reducing valve includes a partition member. The partition member separates a valve chamber and a pressure regulating chamber from each other and has a communication hole for ensuring communication between the valve chamber and the pressure regulating chamber. A valve body has a body portion, which is located in the valve chamber, and a rod section, which extends from the body portion. The rod section extends to the pressure regulating chamber through the communication hole. A communication line is arranged between a peripheral wall of the communication hole and the rod section. The partition member has an annular groove in the peripheral wall of the communication hole. The groove extends along the full circumference of the communication hole.

A self-operated regulator for controlling a stream of working fluid particularly of a processing plant, comprising a control valve and a control actuator configured to receive supply energy for the provision of an operating force exclusively from the stream of working fluid and/or from the working fluid for operating the control valve, characterized by a magnetic field source coupled to the control valve such that it follows the movement of the control valve for determining the movement thereof by means of a magnetic sensor for detection of the position of the control valve.

The pressure regulating device (10) is adapted to be interposed between a pressurized fluid supply and a fluid receiving space into which the pressurized fluid is discharged at a regulated reduced pressure. The device (10) including a housing (12) and a diaphragm assembly (30), wherein the housing (12) includes an apparatus for coupling to the pressurized fluid supply in a sealed manner, and a diaphragm chamber (18) adapted to communicate with the fluid receiving space through a fluid discharging passage (23) and being separated from the pressurized fluid supply by a barrier wall (26) having a central port (28) extending therethrough, wherein the diaphragm assembly (30) includes an elastic diaphragm (31) connected to a throttle head (34) by a stem (32), the stem (32) extending through the central port (28) to define a flow passage therein, and the diaphragm (31) being secured along its periphery to the housing (12) so that in its initial position, the diaphragm (31) rests on a planar upper surface of the barrier wall (26).

In some examples, a pressure reducing valve includes a valve body defining a defining a flow path and a restricting element within the flow path. A sensing element is configured to modify a position of the restricting element in the flow path. A pressure chamber is configured to transmit a force to the sensing element based on the pressure of a fluid within the pressure chamber. An energy accumulator is in fluid communication with the pressure chamber. The pressure reducing valve includes control circuitry configured to enable a fluid to flow into or discharge from the pressure chamber to alter the pressure in the pressure chamber.

Pressure-compensating emitter. The emitter includes an inlet connected to a source of pressurized water and an orifice in fluid communication with the inlet and extending into a channel including a raised land surrounding an outlet. A compliant membrane is positioned above the land in the chamber wherein pressurized water will cause the membrane to deform into contact with the land to alter flow through the outlet so as to provide a constant flow rate. Parameters of the emitter are selected so that the emitter has a large operating range and an activation pressure of 0.15 bar or below.

A pressure regulating valve structure is described. The pressure regulating valve structure may include a valve body, an air inlet channel arranged in the valve body, and a valve stem movably arranged in the air inlet channel and configured to open or close the air inlet channel. In normal conditions, the air inlet channel is open.

A negative pressure regulation valve includes an inflow-side pressure chamber, an outflow-side pressure chamber, a communication hole, and a valve member. The valve member is inserted in the communication hole and movable, in accordance with change of pressure inside the outflow-side pressure chamber, to a closing position for closing the communication hole and an opening position for opening the communication hole. The outflow-side pressure chamber includes, as a liquid outflow hole, a first outflow hole formed below the communication hole and a second outflow hole formed above the communication hole. In a case where a first fluid flows out from the outflow-side pressure chamber via the first outflow hole and the second outflow hole, a first flow path resistance generated when the first fluid passes through the first outflow hole is lower than a second flow path resistance generated when the first fluid passes through the second outflow hole.