Abstract: A stabilizer (1) includes a first passage (20-23) which connects a compressed gas source (2-3) to the circuit breaker and a second passage (9, 16, 34, 22) which makes the circuit breaker communicate with the atmosphere, these passages being normally closed, as well as means (10) for opening the first passage when the gas pressure in the circuit breaker is lower than a first value and means (31, 13) for opening the second passage when the gas pressure in the circuit breaker is higher than a second value. Application to high-tension air blast circuit breaker.

Abstract: The device is especially intended for a pipe supplying a fluid which must be supplied, simultaneously or alternately, with another fluid. The device comprises a tank for a control fluid which surrounds the vertical supply pipe and in which a permanent magnet moves in accordance with the amount of control fluid contained in the tank. The magnet shifts a valve member inside the supply pipe so that the valve member closes the latter in one of the end positions of the magnet. The magnet is rigid with a float which freely extends around the supply pipe. The device can in particular ensure that fuel is supplied to an engine only if oil is supplied to the latter.

Abstract: A steam trap is provided with two paths through which fluid flows from its nput to its output. One path constitutes a control path wherein a small amount of steam or condensate continuously flows through restrictive orifices connected in series between the input and the output. The other path constitutes a main flow path in which a quiet throttling element having a plurality of resistive flow passages and having a moveable valve plug, controls the amount of fluid flowing therethrough. The position of the valve plug and a control piston connected thereto is a function of the fluid flow through the control path between the two orifices; the input and discharge fluid pressures; and a spring connected to the control piston.

Abstract: A rotary shut-off valve featuring an eccentric shaft mounted disk having a spherical periphery co-operating with a flexible metal seal, the latter forming a circle whose center is offset from and rotatingly mounted around the central valve axis to enable alignment with the central axis of said spherical disk periphery to effect tight shut-off.

Abstract: A fuel tank largely filled with a plurality of discrete impermeably walled cells, the cells and the space between them and the tank sides and roof being substantially filled with fire protective reticulated structure. The cells are each plugged into one of a plurality of fuel collection networks, via non-return valves which prevent return flow of the fuel into the cells. The region between the cells and the tank walls is arranged to receive incoming fuel which then flows from the ullage into the cells, and, by means of a self switching pump, is also arranged to empty preferentially. The purpose of the invention is to minimize fuel loss and fuel fire in the event of a tank rupture.

Abstract: A valve sub-assembly as illustrated by the drawing insertable at a "T" connection in a preformed channel so as to form a multiport valve at the site. The valve subassembly is characterized by a cage structure containing spaced apart tied together wafers with valve seats and sealing elements thereon, and a shuttle with valve face ends thereon caged between the wafers, the shuttle riding from one wafer to the other wafer. The channel wall portion sealed between wafers is converted into a valve body.The valve sub-assembly includes a face plate attached to the cage structure and spaced apart from the cage structure, so as to site the cage structure in the preformed channel at the "T" connection, the face plate being adapted to seal the channel opening to an outside wall through which the valve sub-assembly is inserted.

Abstract: A butterfly valve comprising a valve body, a disk-shaped valve member pivotally provided on the valve body, and a seat ring fixed to the valve body, the seat ring having a circumferential protrusion on an inner surface thereof.

Abstract: An outlet valve for a gas compressor includes a valve seat 1 formed with several rows of apertures 16, a thin flat valve plate 2 having several spaced spring tongues overlapping the apertures, a limit plate 4 overlying the valve plate, and a pressure member 5 above the limit plate. To control and damp the movement and flutter of the valve plate it is frictionally gripped between the limit plate 4 and the valve seat, and springs 15 press the limit plate against the valve plate. Both the valve plate and limit plate can move towards and away from the pressure member 5, this movement being restricted to a fraction of a millimeter by spacer bushes 14 and spacer studs 7. The underside of the limit plate 4 is concavely curved to correspond to the natural bending curvature of the thin valve plate.

Abstract: A multi-function valve device for controlling the operation of a pneumatically-driven motor. A spring-biased linkage couples a cam-operated push pin to a valve spool assembly. The valve spool assembly coaxially combines the movable elements of a pressure regulator valve, a run valve, and a park valve into a single unit slidable axially within the valve housing and positioned by the spring-biased linkage. The pressure regulator valve permits an increasing pressure to be applied to a slowed or stopped pneumatic motor, approaching the pressure of the pneumatic source to aid in restarting the motor or to provide the additional force necessary to drive a heavily loaded motor. Automatic park and shutoff functions are also provided.

Abstract: A removable plug used for setting land timming of a control valve spool or spring loading in relief valves. The plug has deflectable contact points which deform in its plastic range against the harder surface of the valve body as the plug is screwed into the valve body to position the spool for precise and repeatable land timming.

Abstract: A valve seat contains a seat ring (12) with flat, parallel side faces (19, 20). The seat ring consists of steel or possibly of PTFE. When the valve is being shut by a throttle (1), a sealing surface of the throttle is pressed against the seat ring which adopt itself as to form and position to the mean line of the throttle, and the seat ring is displaced in a groove (18) in the plane of the seat. A couple of spring washers (10, 11) sealingly engage the parallel side faces of the seat ring. When the throttle is reopened the spring washers secure the seat ring in its position.

Abstract: Apparatus for measuring the amount of fuel supplied by a fluid supply device wherein a throttle element is inserted in a supply line to a supply device having an apportioning cross-section wherein a constant pressure differential is maintained by means of a pressure comparison device in which the comparison results in an adjustment of the throttle element and whereby the cross-section or the position of the throttle element provides a measurement of the amount of fluid flowing through the supply line which can be transformed into a desirable and useful control value.

Abstract: The charging valve comprises a pressure port connected with a pressurized fluid source, a first user port which is connectible to a first user component, a second user port which is connectible to an accumulator and to a second user component of the closed center type and a valve device which is switchable dependent upon the pressure existing in the accumulator. The valve device, below a predetermined pressure in the accumulator, connects the pressure via a throttle with the second user port and, above a predetermined pressure in the accumulator, connects the pressure with the first user port. The valve device includes a closing valve which is controlled by a control pressure and the closing valve closes the connection of the pressure port with the first user port, if the pressure in the accumulator is below the predetermined pressure. Further, the closing valve can only be closed by the control pressure if the center of the second user component is open.

Abstract: An improved clamp for regulating the flow of fluid through a length of flexible tubing comprises a clamp body for supporting the tubing, having opposing walls extending from the surface of the clamp body so as to present a passage for the flexible tubing. A platen is mounted between the walls for contacting the tubing. Guide surfaces are arranged in the walls with a roller positioned within the guide surfaces. The platen is movably positioned between the roller and the flexible tubing so as to present a compression surface against the tubing along the path of travel of the roller. The combination of the platen and the roller exerts a compressive force against the tubing and distributes the force over a wide area of the tubing so as to prevent permanent deformation of the tubing. This compressive force constricts the tubing and thereby regulates flow of liquid therethrough.

Abstract: A butterfly valve with a seal face (4)having two opposite, essentially spherical sections (h, i) intersected by a symmetry plane (k) through the throttle which coincides with an axis through a point (n) parallel with the torsional axis (j) of the throttle and two opposite, essentially conical sections (f, g) on both sides of the symmetry plane. The spherical and the conical sections successively merge into each other. When the throttle is revolved to shutting position, the sealing line (a) which has circular shape is pressed against a valve seat (18) shaped as a circular ring made of steel. An eccentrical location of the torsional axis (j) will cause that a surface contact between throttle and valve seat wil occur simultaneously along the entire sealing line in the shutting movement.

Abstract: An annular blowout preventer for use on an oil or gas well rig having a lower housing, an upper housing, a resilient sealing means, a vertical bore coaxially positioned through the housing and a vertically acting piston for actuating the sealing means in which the inner surface of the upper housing and the inner surface of the lower housing are concentric spherical surfaces extending to the bore. The resilient sealing means includes steel segments extending between the top and bottom of the sealing means and the top and bottom of the sealing means and the steel segments have spherical surfaces coacting with the spherical surfaces on the upper and lower housings. The upper and lower housings each include a vertical wall extending downwardly from the spherical surfaces on the upper and lower housing and the vertical moving piston sealingly engages the vertical walls.

Abstract: This invention concerns a butterfly valve having a resilient, adjustable body seat for the pivoting disc. The seat comprises a T-shaped elastomeric ring which is confined at one end by the transverse wall of an annular groove in the valve body and that another end by a clamping ring which slides along the wall of the flow passage extending through the body. The clamping ring is forced against the seat ring by a plurality of individual screw actuators spaced around its circumference and therefore selected portions of the seat ring can be compressed as needed to produce a leak-free seal around the entire periphery of the pivoting disc. The T-shaped elastomeric ring is held in place solely by mechanical forces in order to permit removal, maintenance, and replacement thereof.

Abstract: A balanced stem gate valve incorporating a slab gate having hard friction resistant sealing face surfaces that cooperate with friction resistant seat assemblies to provide for low operating torque under high pressure conditions. Seat carrier rings are supported within the valve chamber and define seal recesses within which are retained a metal back-up seal ring and a hard friction resistant face sealing ring that is compatible with the sealing surface material of the gate. Metal-to-metal back sealing is provided between the stem and bonnet and between the pressure balancing stem and the valve body structure, depending upon the position of the reversable gate member.

Abstract: An adaptor assembly for connecting a tubing with either a male or female fitting is disclosed. Flow control means within the adaptor assembly comprise an important feature of the disclosed and preferred embodiment wherein the flow control means comprises a filter. The filter is a disk of filtrant material such as a nonwoven fiber formed into a pad of specified thickness and cut in a circle. It is placed adjacent to a shoulder in the adaptor and is supported by a surrounding ring.An alternate embodiment which is one of the preferred embodiments hereof includes a check valve serving as the flow control means. The check valve is constructed with a circular valve seat having a chamfered shoulder, a spherical valve element which closes against the seat to block flow, a surrounding sleeve which permits the check valve element to move toward and away from the chamfered seat and a transversely extending disk to block the passage. The disk blocks the valve element from escape.

Abstract: A disc valve having a valve housing with a conduit therethrough and a seal ring mounted to the housing. A disc can be pivoted about a pivot axis that is offset from the main valve axis and perpendicular thereto between an open position and a closed position in which a seating surface of the disc contacts a sealing surface of the seal ring in a sealing plane that is perpendicular to the valve axis. The seating surface of the disc is a conically shaped surface that is concentric with the valve axis when the disc is in the closed position. At least a portion of the sealing surface of the seal ring at the intersection between the sealing surface and the sealing plane has the same conical shape. The seal ring can be deflected by moving the disc beyond the closed position to thereby increase the sealing pressure between them.