Flow control systems and methods for controlling the flow of liquid into and out of a tubular member comprising a perforated portion that is configured to distribute a flow of liquid having a predefined fixed liquid pressure through the perforated portion to pressurize an intestine that is suspended on the tubular member is disclosed. The flow control system comprises a flow regulating valve having a slidably arranged valve structure arranged in a pressurized liquid filled water chamber and an elastic water-side diaphragm arranged in the water chamber and connected to the valve structure such that the water-side diaphragm allows the valve structure to be moved in a first direction along the longitudinal axis of the valve structure to increase the volume in the water chamber and be moved in the opposite direction to decrease the volume in the water chamber.

A pressure regulator for liquid media includes a through-flow path which extends between two connections for a medium-conducting line. The through-flow path is equipped with a valve seat which can be released or closed by a closing element that is mounted in a movable manner between a closing position and a release position. A wear of the closing element and/or the valve seat can be monitored during ongoing operations using a wear sensor device.

A dome pressure regulator for regulating gas pressure, having a housing (1), a fixed valve seat (10), a movable valve body (8), a closing spring (9) acting on the valve body (8), and a diaphragm (4) which is connected to the valve body (8) and which is able to be subjected to a control pressure, settable via a gas pressure spring, in the opening direction and to a secondary pressure in the closing direction. The object of the invention is to detect state parameters of the system and to integrate continuous functionality checking and logging of the collected measurement values into the pressure regulator. In order to achieve said object, the invention proposes at least one travel sensor (15), by way of which the stroke of the valve body (8) is measurable, and a sensor-system evaluation unit (17) integrated into the housing.

A regulator for establishing outlet fluid pressure. The regulator includes a valve body having a fluid pressure inlet in selective fluid communication with a fluid pressure outlet. A pilot pressure inlet is formed in the valve body and in fluid communication with a source of pilot pressure. Valving structure in the valve body establishes outlet fluid pressure as a function of pilot pressure. First adjustable structure within the valve body may establish a minimum outlet fluid pressure threshold without regard to pilot pressure. Second adjustable structure within the valve body may establish outlet fluid pressure offset relative to pilot pressure.

A main valve throttle (53) of a main valve (43) is configured by a lateral hole (53A) communicating an inlet side flow passage (25) and an outlet side flow passage (27) through the inside of the main valve (43) and a groove portion (53C) communicating the inlet side flow passage (25) and the outlet side flow passage (27) via an outer peripheral portion of the main valve (43). The groove portion (53C) is located such that a hydraulic fluid spurting from the groove portion (53C) changes the direction of a flow of a hydraulic fluid spurting from the lateral hole (53A). In this case, the direction of a flow of a hydraulic fluid F2 spurting from the lateral hole (53A) can be changed to approach the direction parallel to the center axis of the main valve (43) by a hydraulic fluid F1 spurting from the groove portion (53C).

A valve includes a valve body with an inlet and an outlet coupled to a tubular conduit operable to circulate a flow of a process fluid, an actuator with an interior volume divided by a valve diaphragm into a first volume portion that encloses a working fluid and a second volume portion, and a plug coupled to the valve diaphragm and operable to move toward an open position or a closed position based on movement of the valve diaphragm relative to a pressure of the working fluid. A seal isolator is coupled to the tubular conduit and includes an isolator diaphragm having a first side exposed to the flow of the fluid and a second side fluidly coupled to the first volume portion through the working fluid. The isolator diaphragm is configured to transmit a pressure of the flow of the process fluid to the pressure of the working fluid.

The invention relates to a regulator, configured to receive a stream of hot air carrying pneumatic power via an air inlet (12), to treat this hot air and to send the treated hot air to an air outlet (14) configured 5 to supply a pneumatic actuator (16), comprising a reference pressure source and an air expansion device comprising a diaphragm (22), the diaphragm (22) being configured to control the flow rate of the hot air stream by comparing the pressure of said hot air stream with the reference pressure of the reference pressure source. The regulator is characterized in that it 10 comprises an air intake (24) configured to receive a cold source, and a pipe (25) for guiding the cold source to the diaphragm (22), so that the cold source forms the reference pressure source and a source for cooling the diaphragm (22).

A valve includes a valve body with an inlet and an outlet coupled to a tubular conduit operable to circulate a flow of a process fluid, an actuator with an interior volume divided by a valve diaphragm into a first volume portion that encloses a working fluid and a second volume portion, and a plug coupled to the valve diaphragm and operable to move toward an open position or a closed position based on movement of the valve diaphragm relative to a pressure of the working fluid. A seal isolator is coupled to the tubular conduit and includes an isolator diaphragm having a first side exposed to the flow of the fluid and a second side fluidly coupled to the first volume portion through the working fluid. The isolator diaphragm is configured to transmit a pressure of the flow of the process fluid to the pressure of the working fluid.

A pneumatic amplifier includes a valve body, a first comparison chamber, a third comparison chamber and a second comparison chamber. A first diaphragm and a second diaphragm are arranged in the first comparison chamber and fixed to the valve body. A mounting plate A is fixedly arranged between the first diaphragm and the second diaphragm. A seventh diaphragm, an eighth diaphragm, a ninth diaphragm and a tenth diaphragm are arranged in the second comparison chamber and fixedly arranged on the valve body. A mounting plate C is fixedly arranged among the seventh diaphragm, the eighth diaphragm, the ninth diaphragm and the tenth diaphragm. A third diaphragm, a fourth diaphragm, a fifth diaphragm and a sixth diaphragm are arranged in the third comparison chamber and fixed to the valve body. A mounting plate B is fixedly arranged among the third diaphragm, the fourth diaphragm, the fifth diaphragm and the sixth diaphragm.

A pneumatic amplifier includes a valve body, a first comparison chamber, a third comparison chamber and a second comparison chamber. A first diaphragm and a second diaphragm are arranged in the first comparison chamber and fixed to the valve body. A mounting plate A is fixedly arranged between the first diaphragm and the second diaphragm. A seventh diaphragm, an eighth diaphragm, a ninth diaphragm and a tenth diaphragm are arranged in the second comparison chamber and fixedly arranged on the valve body. A mounting plate C is fixedly arranged among the seventh diaphragm, the eighth diaphragm, the ninth diaphragm and the tenth diaphragm. A third diaphragm, a fourth diaphragm, a fifth diaphragm and a sixth diaphragm are arranged in the third comparison chamber and fixed to the valve body. A mounting plate B is fixedly arranged among the third diaphragm, the fourth diaphragm, the fifth diaphragm and the sixth diaphragm.