The present invention is a for monitoring and alerting an operator to internal piping air pressure variations whereby said system includes an air pressure gauge and a smart screen, whereby said smart screen is constructed with communications capability to alert a system operator in real time when a pressure threshold has been breached.

The present disclosure is directed towards electro-fluid transducers that may influence the flow of a fluid in and around a channel. In one such embodiment, a system comprises a first electrode at least partially encapsulated by a first dielectric; a second electrode at least partially encapsulated by a second dielectric, wherein a portion of a channel exists between the first dielectric and the second dielectric; a third electrode positioned in the channel; and a fourth electrode positioned in the channel, wherein the electrodes influence a flow of a fluid in the channel upon the electrodes being energized.

A fluid-conduit collector (20, 20.x, 20.sup.a, 20.sup.b) spans across a plurality of collector-inlet interface structures (24, 24.1, 24.2, 24.3, 24, 24) and at least one fluidic diode element (26, 26.1, 26.2, 26.3, 26, 26). A branch inlet portion (20, 20.1, 20.2, 20.3) of at least one collector-inlet interface structure (24, 24.1, 24.2, 24.3, 24, 24), in fluid communication with a corresponding fluid-conduit runner portion (14, 14.x), provides for receiving fluid from a source of fluid (12). A main inlet portion (20.x) of the collector-inlet interface structure in fluid communication with an outlet portion (20.x) thereof defines a portion of the fluid conduit of the collector (20, 20.x, 20.sup.a, 20.sup.b). The branch inlet portion (20, 20.1, 20.2, 20.3) is in fluid communication with the outlet portion (20.x) via a collector inlet port (56, 106) that is at least partially bounded by a relatively-sharp-edged junction (60) with the fluid conduit of the collector (20, 20.x, 20.sup.a, 20.sup.b). The fluidic-diode element (26, 26.1, 26.2, 26.3, 26, 26) located coincident with, or downstream of, the collector inlet port (56, 106) provides for a relatively-higher coefficient of discharge for fluid flowing (34, 64) towards (36) an outlet (38) of the collector (20, 20.x, 20.sup.a, 20.sup.b), than for fluid flowing (32) in a reverse direction (40).

A fluidic device for providing analogue output control includes a main channel, a first control channel, a second control channel, a comparator which receives respective input fluid flows from the main, the first and the second control channels. The first control channel is configured such that the input fluid flow therefrom carries an oscillating pressure wave signal, the second control channel includes a flow regulator controllable to vary the mass flow rate of the input fluid flow from the second control channel, and the main channel is configured such that the input fluid flow therefrom is at a reference mass flow rate. The comparator is configured such that the input fluid flows from the first control and the second control channels act in combination on the input fluid flow from the main channel to produce an output fluid flow from the comparator having a PWM mass flow rate characteristic.

The present disclosure relates to a load dependent flow control system for directing hydraulic fluid to a hydraulic actuator. The load dependent flow control system includes a closed-center valve device for controlling hydraulic fluid flow to the actuator. The closed-center valve device includes a valve spool and an electro-actuator that adjusts a position of the valve spool to adjust a rate of the hydraulic fluid flow supplied to the hydraulic actuator. A pressure sensor is provided for sensing a pressure of the hydraulic fluid provided to the hydraulic actuator. The system also includes an electronic controller configured to receive an operator flow command from an operator interface. The operator flow command corresponds to a base flow through the closed-center valve device. The electronic controller interfaces with the electro-actuator of the closed-center valve device and with the pressure sensor. At least when the sensed pressure is above a threshold pressure, the electronic controller uses the operator flow command and the sensed pressure to generate a pressure-modified flow command that is sent to the closed-center valve device to control flow through the closed-center valve device. The pressure-modified flow command corresponds to a pressure-modified flow through the closed-center valve device. The pressure-modified flow is less than the base flow through the closed-center valve device.

Apparatus or creating a swirling flow of fluid comprises a transmission base with an internal cavity to receive the fluid flow from outside via a side penetrable hole which the longitudinal inner surface of the transmission base will be in shape of slope of continuous line, or slope of line intervals with different degree of slope, or slope of line intervals with at least one bending angle or slope of curve either convex curve or concave curve with at least one curvature to increase or decrease acceleration of swirling flow along the longitudinal internal cavity and in the manner of a laminar swirling flow. And beside the side penetrable hole will become a side hole edge for regulating the flow of fluid to flow inside the transmission base in the manner of a laminar swirling flow in the internal cavity of transmission base which a part of the hole side edge can have an elevated insert shoulder for stacking the attachment to overlay on the insert supporting shoulder of another transmission base stack them higher.

A method and apparatus are presented. An active flow control system comprises a flow control valve, a manifold, and a temperature control system. The flow control valve is configured to control a flow of air into the manifold. The manifold is operatively connected to a number of actuators. The temperature control system is configured to heat at least a portion of the flow of air.

A method and apparatus are presented. An active flow control system comprises a flow control valve, a manifold, and a temperature control system. The flow control valve is configured to control a flow of air into the manifold. The manifold is operatively connected to a number of actuators. The temperature control system is configured to heat at least a portion of the flow of air.

A well tool includes a body defining an enclosed fluid passage. A bipolar electrode is provided in the well tool, changeable between a first, energized state, and a second, different state. The bipolar electrode in the first state produces an ion depletion zone that presents a flow restriction to saline fluids in the fluid passage.

A well tool includes a body defining an enclosed fluid passage. A bipolar electrode is provided in the well tool, changeable between a first, energized state, and a second, different state. The bipolar electrode in the first state produces an ion depletion zone that presents a flow restriction to saline fluids in the fluid passage.