Abstract: An automatic obstruction device for closing a filling circuit for filling a tank with fluid includes: a movable element movable between a non-obstruction position of the filling circuit, in which the movable element offers resistance to the fluid compatible with the filling of the tank, and an obstruction position of the filling circuit, in which the movable offers a resistance to the fluid that is incompatible with the filling of the tank; a holding element of the movable element holding the movable element in the non-obstruction position, and allowing movement of the movable element toward the obstruction position; and a first device of non-reversible movement or of non-reversible modification of the holding element allowing movement of the movable element toward the obstruction position, and being controllable by a control device.

Abstract: An automatic obstruction device for closing a filling circuit for filling a tank with fluid includes: a movable element movable between a non-obstruction position of the filling circuit, in which the movable element offers resistance to the fluid compatible with the filling of the tank, and an obstruction position of the filling circuit, in which the movable offers a resistance to the fluid that is incompatible with the filling of the tank; a holding element of the movable element holding the movable element in the non-obstruction position, and allowing movement of the movable element toward the obstruction position; and a first device of non-reversible movement or of non-reversible modification of the holding element allowing movement of the movable element toward the obstruction position, and being controllable by a control device.

Abstract: A safety operation method includes detecting a steam pressure inside a high-pressure casing of the high-pressure part and a steam pressure inside a low-pressure casing of the low-pressure part; obtaining a low-pressure casing limit pressure as a reference corresponding to a pressure of the high-pressure casing in each detection, on a basis of a pressure correlation line expressing a prescribed special relation between preset high-pressure casing pressure and low-pressure casing pressure of the extraction steam turbine; comparing the low-pressure casing limit pressure with the detected pressure of the low-pressure casing; and forcibly throttling an opening of the main steam control valve to reduce the flow rate of steam flowing into the high-pressure part, in a state in which the extraction control valves continue controlling an operation of the extraction steam pressure, when the detected pressure of the low-pressure casing is judged to be higher than the low-pressure casing limit pressure.

Abstract: A valve assembly includes a valve body having an input in selective communication with an output, a latching piston disposed within the valve body, a balance spring disposed between the latching piston and the valve body, and a valve piston disposed within the valve body. The input communicates with the output when the valve piston is in a first position and the input does not communicate with the output when the valve piston is in a second position. A diaphragm spring is disposed between the latching piston and the valve piston. A holding spring is disposed between the valve piston and the valve body.

Abstract: An assembly includes a valve body having an inlet in selective communication with an outlet and having an unlatch port, a latching piston disposed within the valve body, a balance spring disposed between the latching piston and the valve body, and a valve piston disposed within the valve body. The inlet communicates with the outlet when the valve piston is in a first position and the inlet does not communicate with the outlet when the valve piston is in a second position. A diaphragm spring is disposed between the latching piston and the valve piston. A holding spring is disposed between the valve piston and the valve body. An unlatching mechanism is in communication with the unlatch port of the valve body.

Abstract: Systems and processes may provide field-initiated testing and/or control of fluid regulatory systems. In one aspect, a fluid regulatory testing system may include a field test initiator and a fluid regulator control system. The field test initiator may alter control signal delivered to the fluid regulator control system upon activation of a user input device. The fluid regulator control system may receive control signals from the field test initiator and generate fluid regulator control signals. The fluid regulator control system may also detect whether a control signal has been altered, and initiate a fluid regulator testing sequence, if the control signal has been altered. The fluid regulator control system may include a latch mode. When a latch mode is commenced, generation of fluid regulator control signals based on received control signals and/or alteration of a position of a fluid regulator may be inhibited.

Abstract: Apparatus and method for fail-safe high-speed-pneumatic valve is disclosed. Fail-safe dependability is provided by a spring-loaded normally-closed pneumatic actuator. When the spring-loaded actuator is pressurized, the normally closed mechanism is actuated to the valve active position. Concurrently, the pressure is directly applied to deflect a diaphragm or a bellow-assembly back to sealing position. Ultra high purity embodiments with standard dome shaped diaphragms are disclosed. Additional high conductance diaphragms and bellows embodiments are employed for higher conductance valves. Novel flow path layouts are disclosed. The valves are applicable for fast gas and fluid switching and are particularly suitable for high productivity Atomic Layer Deposition (ALD) applications. Additional embodiments cover improved diaphragm and seal reliability, externally adjustable valve conductance, improved valve safety and high temperature valve seals.

Abstract: A sliding spool valve (1) is provided for controlling flow of fluid especially between an inlet (2) at a relatively high pressure and an outlet (6) at a relatively low pressure. Wherein the spool valve is reciprocally displaced between open and closed positions by hydraulic action of the transmitted fluid.

Abstract: The invention involves a variable valve timing actuator that allows the opening and closing of engine valves to be variably and individually controlled without using a camshaft. The invention utilizes energy regeneration so energy delivered to a valve while accelerating it is recovered while it is decelerating. Regeneration is preferably provided by potential energy storage devices such as springs. Energy losses are made up by adding energy to the actuator while the valve is stationary (or nearly so) in an open or closed state. This is done by (1) moving the spring seats in relation to the valve, thereby “charging” the springs in relation to the valve, and/or by (2) moving the valve with respect to the spring seats to “charge” the springs with respect to the valve. This energy addition is extremely efficient because it is performed after the potential energy within the springs has already been expended and the valve is sitting stationary in its open and closed positions.

Abstract: A pilot hydraulic system controller including a pilot controller valve for controlling the flow of hydraulic fluid to actuate a primary hydraulic system valve, a pilot controller lockout valve, and a detent control circuit for selectively energizing a detent solenoid coil connected to said pilot controller valve, the detent control circuit include a switch means for selectively disabling the detent solenoid coil when the pilot controller lockout valve is actuated to hydraulically disable the pilot controller, so as to prevent the detent solenoid coil from acting upon the pilot controller valve when the pilot controller is hydraulically disabled.

Abstract: A moisture-responsive valve assembly includes a housing having a moisture-swellable body to swell in volume in response to soil moisture, and a bi-stable snap-action device for controlling the valve in response to the volume of the moisture-swellable body. The valve assembly further includes a damped delay mechanism effective to close the valve after it has been open for a predetermined period of time.

Abstract: Directional control valve includes a manually operated pilot valve stage and a hydraulically operated power valve stage to isolate the pilot valve stage from the effects of the high axial flows passing through the power valve stage. The pilot valve is spring loaded in the stow direction as long as the directional control valve is disconnected from system pressure. Such spring also acts as a stowed condition linkage pre-tensioner to avoid fretting of various parts during vibration conditions and the like. When system pressure is applied to the directional control valve, such preload is automatically removed from the pilot valve for ease of movement between the stow and deploy positions by a relatively low manual input rotary force.

Abstract: An improved flow control valve apparatus for pneumatically powered tools that include a motor and feed and retract apparatus driven by the motor. The control valve apparatus includes a main flow valve and a retract control valve each of which is controlled by the control valve to provide air to the motor, to automatically stop the feed and retract motion of the tool, and to stop the tool completely when desired.

Abstract: An electromagnetically driven hydraulic actuator for driving an electromagnetic valve for which a larger valve operating force is required. The pilot control valve and the actuator piston are enclosed within the stationary magnetic core of the electromagnetic plunger of the actuator so that a compact driving unit is provided for driving the valve.

Abstract: A valve structure (10) wherein a main valve (11) is controlled by a pilot valve (15) which is normally selectively positioned by the coaction of a solenoid coil (17) and plunger (16). A manual override structure (22) is provided for selectively permitting normal control of the pilot valve by the solenoid, or causing a fast repositioning of the plunger against the action of the normal biasing spring 50 thereof.

Abstract: An overflow preventing valve apparatus comprises a valve main body provided at a terminal end of a fluid supplying system passage, a main valve fixed to a separating membrane stretched within the valve main body to separate an upper chamber and a lower chamber, when the main valve is displaced upwards and downwards accompanied by deformation of the separating membrane and closing a fluid supplying passage upon moving downwards, a pilot valve for opening and closing the main valve in response to the opening and closing of the pilot valve itself, where the pilot valve is opened by a fluid supply starting operation, a lock mechanism for locking the pilot valve in an open state, a first lock releasing mechanism responsive to the detection of a dangerous fluid level which could lead to an overflow, for releasing the locking operation by the lock mechanism to close the pilot valve, and a second lock releasing mechanism responsive to the closing operation of the main valve at the time when the supply of fluid is sto

Abstract: A trip cock device including a pilot valve actuable by a trip lever, when the train on which the trip cock is mounted passes over a trip arm secured to the track, for causing a release valve in the trip cock to be opened and opening brake pipe pressure to atmosphere, at an emergency rate, for effecting an emergency brake application. Axial displacement of the pilot valve, along with a stem thereon, causes a groove in the stem to be engaged by a detent member for securing the trip cock in open disposition until the detent is released manually.

Abstract: A self-releasing clamp for a fluid carrying hose comprises an inclined guide and a roller carried by the guide which is movable along the guide between a hose releasing position and a hose clamping position. There is a hose support for holding the hose against the roller. A mechanism provides a space between the roller and the hose support when the roller is in the clamping position. The space providing mechanism permits a limited flow of fluid past the clamp to increase pressure in the hose downstream from the clamp when the fluid flow downstream from the clamp is stopped, expanding the hose between the hose support and the roller and moving the roller to the hose releasing position.

Abstract: A flush valve including a housing, a removable partition sealingly engaging said housing and defining a primary chamber and a control chamber; the housing including an inlet port in the primary chamber for connection with a source of flushing fluid, and an outlet port in the primary chamber for dispensing the fluid; a valve element connected with the partition for closing the outlet port; first biasing means for producing a force on the partition to urge the valve element to close the outlet port; a passage interconnecting the primary control chambers for enabling equalization of pressure therebetween; an actuator mechanism including an actuator valve connected with the control chamber and an actuator member for setting the actuator valve to the open position to vent the control chamber and enable the valve element to move away from the outlet port and open the flush valve; and an actuator control mechanism driven by the partition as the valve element moves away from the outlet port, for driving the actuator

Abstract: In a flush valve having a housing, a moveable partition sealing engaging the housing, and defining a primary chamber and a control chamber; an inlet port in the primary chamber and an outlet port in the primary chamber; and a valve element connected with the partition for closing the inlet port and the outlet port; the improvement including: an actuator mechanism including an actuator valve connected with the control chamber; an actuator member for setting the actuator valve in the open position to vent the control chamber and enable the valve element to move away from the outlet port and open the flush valve; and an automatic release member moveable with the actuator member for setting the actuator valve to the open position and moveable independently of the actuator member to reset the actuator valve in the closed position; and an actuator control mechanism driven by the partition as the valve element moves away from the outlet port for driving the automatic release member to reset the actuator valve to the