Abstract: An oxygen partial pressure controller regulates the oxygen partial pressure (PPO.sub.2) of the product gas of a pressure swing adsorption oxygen enriching system by means of a bleed valve which increases gas flow through the adsorptive system thereby decreasing the PPO.sub.2 of the product gas. The controller includes a solenoid valve which permits the bleed valve to function when the adsorption system pressure and PPO.sub.2 is high.

Abstract: A flow dividing valve wherein an outer sleeve (26) is maintained in a valve body (10) and has a primary flow valve seat (32). An inner valve sleeve (50) that is slidably maintained in outer sleeve (26) has an end face (51) that cooperates with the valve seat (32) to control primary flow. A valve spool (74) that is slidably maintained in inner valve sleeve (50) cooperates with a secondary flow valve seat (70) of inner valve sleeve (50) to control secondary flow.

Abstract: An oxygen partial pressure controller regulates the oxygen partial pressure (PPO.sub.2) of the product gas of a pressure swing adsorption oxygen enriching system by means of a bleed valve which increases gas flow through the adsorptive system thereby decreasing the PPO.sub.2 of the product gas. The controller includes a solenoid valve which permits the bleed valve to function when the adsorption system pressure and PPO.sub.2 is high. An aneroid controls the product gas flow as a function of altitude when the bleed valve is permitted to function.

Abstract: A valve seat for use in a ball valve has a shoulder portion, an elastic lip portion, a circumferential non-contact surface, at least one recess and an intersecting portion. The shoulder portion has an engaging surface on its rear surface which contacts the contact surface of the valve casing perpendicular to the flow passage. The non-contact surface is formed on the rear face of the valve seat between the engaging surface and the lip portion and stepped away from the contact surface. The recess is formed in the shape of a groove in the non-contact surface and has its bottom flush with the rear surface of the lip portion stepped away from the contact surface in such a manner that the lip portion is not thinned so as to ensure sufficient strength of the lip portion. The intersecting portion is disposed between the engaging surface and the non-contact surface.

Abstract: A valve mechanism for a dual tank fuel supply system includes a housing (304) communicated to the return circuit (118, 218) and supply circuit (116, 216). The valve mechanism is responsive to pressure differentials between branches (170, 172 and 270, 272) of the supply circuit (216) to switch communication between branches (178, 180, 278, 280) of the return circuit (118, 218) accordingly.

Abstract: A mobile metering apparatus is provided for metering into a liquid stream or flow an agent which is to be metered or dosed in a quantitative proportional relationship. The metering apparatus contains liquid meter through which passes the liquid flow and a metering pump connectable to a dosing agent reservoir on the input side thereof and to a metering location at the output side thereof. The metering pump meters the agent from the reservoir into the liquid flow as a function of signals supplied by the liquid meter. The liquid meter is installed in a short conduit portion provided with an inflow connection and an outflow connection. The short conduit portion, liquid meter and metering pump are mounted at a supporting frame enclosing the aforementioned members on all sides. The drive of the metering pump is accomplished by the pressure of the liquid flow.

Abstract: A pressure reducing and regulating valve which is operated to move a seal container between an inlet, outlet and vent port in response to fluid pressure. One feature allows the valve to be mounted on a subplate in which both the inlet pressure and the outlet pressure pass through a porting plate which provides a hold down force to compensate for the forces acting to separate the porting plate from the subplate mounting and thus prevent seal extrusion. Another feature of the present invention is the provision of force flow compensating holes which reduce hammering or chattering of the regulating valve.

Abstract: A valve molded entirely of resin includes a valve body having an inner housing, a housing cap fitted in the inner housing, a valve element such as a ball, and a stem coupled to the valve element and actuatable to move the latter for providing selective communication between ports in the inner housing and the housing cap. The valve body is covered with a frame molded of resin and substantially covering the exterior surface of the valve body.

Abstract: A valve device providing control of fluid pressure flow between a supply chamber and a delivery chamber by a movable plunger which forms a seal between the chambers when seated against a stationary supply valve seat and which establishes flow of fluid pressure between the chambers when unseated from the supply valve seat. A mechanical stop is provided on the supply valve seat to limit travel of the plunger beyond a predetermined point when the supply valve is seated against the supply valve seat. Thus, the exhaust valve on the plunger is prevented from traveling far enough to seal against the exhaust valve seat, thereby also preventing the supply valve from cutting into the supply valve and the possibility of inadvertently trapping pressure in the delivery chamber.

Abstract: A high pressure ball valve including a valve body with inlet and outlet ports, a ball having a passageway therethrough disposed between the ports, and seats between the ball and the ports guidably supporting the ball. Each seat includes a core of polyethersulphone having a ball engaging face with the same radius as the ball, a metal reinforcing ring, and elastomeric seals bonded to the ball engaging face and the face that seats in the valve body.

Abstract: This invention relates to a ball valve having a valve body with a bonnet bore communicating with a through fluid bore. A valve seat in the valve body surrounds the fluid bore axis. A bonnet with a stem bore extending therethrough is received in the bonnet bore. An operating stem is journalled for rotation in the stem bore. A ball is connected to the stem and located in the fluid bore. The ball has a through passageway. Rotation of the stem causes the ball to rotate eccentrically between an open position at which the ball is spaced from the valve seat with its through passageway aligned with the fluid bore, and a closed position at which the ball blocks the fluid bore by being wedged into sealing engagement with the valve seat. The ball is externally contoured to provide both a clearance from the valve body to accommodate its eccentric rotation, and a stop which is engageable with the valve body to positively locate the ball in its open position.

Abstract: This invention relates to a check valve having a straight-through flow passage wherein a ball-plug of a cylindrical geometry with a hemispherical end is pendulously confined in a cavity included in the valve body. The ball-plug has a through-hole with the central axis substantially passing through the center of a spherical surface including the hemispherical end of the ball-plug, which central axis substantially intersects the central axis of the ball-plug in an oblique angle. The ball-plug is pendulously confined in the cavity within the valve body by a trunnion in such a way that the ball plug is allowed to swing on a plane including the central axis of the flow passage of the check valve passing through the cavity confining the ball plug and the central axis of the ball plug. At one extreme position in the swinging movement, the through-hole included in the ball plug lines-up with the flow passage allowing straight-through flow for the fluid from one extremity to the other extremity of the check valve.

Abstract: The fluid valve comprises an integral housing made of forged steel, the housing having tubular end portions as fluid inlet and outlet, respectively, conical transition zones having a cone angle of at least 30.degree., and a central enlargement joined by said transition zones to said inlet and outlet ducts. The valve system is positively held between the transition zones. One of the transition zones may form the valve seat cooperating with an axially displaceable valve body.

Abstract: Valve in which a flow-control ball and two conical seals are enclosed in a unitary housing, the housing being formed from a tube of malleable metal, the tube being formed to provide two opposed conical portions after the elements have been inserted in the tube.

Abstract: A control valve assembly incorporates a piston and a flow control valve which are both biassed in the same direction against pressure in an hydraulic accumulator by first and second respective springs. Accumulator pressure in a control chamber also acts to urge the flow control valve in the same direction as it is biassed by the second spring and pressure from a pump acts to bias the flow control valve in the opposite direction. A pilot dump valve controlling communication between the chamber and an outlet connection is normally biassed into a closed position by a third spring. The dump valve is adapted to open at a cut-out pressure to dump pressure from the chamber, and the cut-out pressure is determined by the area of the seating of the dump valve over which the pressure in the chamber acts, and the force in the third spring. A cut-in pressure at which the dump valve closes is determined by the area of the piston and the force in the first spring.

Abstract: A ball valve is disclosed herein having the portions of the ball surface removed which would be exposed to the fluid in the line when the valve is closed. These portions have bottoms of smaller diameter than the inside diameter of the seats for the ball. Therefore, the surface that has been exposed to liquid while the valve was closed cannot contact the valve seats during the turning cycle of the ball in the valve body either moving from closed to open or open to closed position.

Abstract: A rotatable shaft assembly comprising a body with a bore having a first end and a second end and an annular abutment formed intermediate the first and second ends of the bore and extending radially inwardly into the bore, a shaft or stem rotatably received in the bore, said shaft having a reduced diameter portion forming an annular shoulder which faces the second end of the bore, a retaining collar disposed in the bore adjacent the abutment, the retaining collar including an annular band and a plurality of resiliently, radially deflectable fingers depending radially inwardly from said band, each of the fingers forming a strut portion terminating in a free end which engages the shoulder on the shaft upon movement of shaft toward the second end of the bore and a stop member disposed in the bore for stopping movement of the retaining collar toward the second end of the bore.

Abstract: The mixing valve includes a plurality of flow regulating assemblies (A) each of which independently regulates the flow of one of a plurality of fluids. Each flow regulating assembly includes a pressure displaceable structure (22) which is physically displaced by changes in pressure and a movable valving member (50) which is movable relative to a stationary valve seat (42) for adjusting the cross section of a flow path therebetween. The movable valving member is operatively connected with the pressure displaceable structure such that the cross section of the flow path varies generally in inverse proportion to the sensed pressure. A proportioning assembly (B) proportions back pressure from adjacent a mixed fluid outlet (132) between the flow regulating assemblies such that each flow regulating assembly regulates its fluid flow in accordance with the proportion of the back pressure accorded it.

Abstract: A disposable ball valve wherein the union is adhered inside the valve body of the valve housing so as to form the valve chamber for rotatably receiving the ball therein. On the surfaces of the valve body and the union facing the ball, annular grooves of rectangular cross-sections are formed. Within the annular grooves, there are fitted annular seating rings made of polytetrafluoroethylene backed by resilient rubber rings. Thus, the ball and the union do not disconnect from the valve housing by applied fluid pressure, and the sealing performance of the ball valve can be maintained for a long period. In addition, contact surfaces of the valve housing and the tubular caps are formed in the shape of complementary spherical surfaces slidable to each other. Thus, even if the pipelines are deviated from the axis of the flow passage by means of external forces, the ball valve substantially does not receive such excess forces.

Abstract: A laser beam duct pressure controller system for maintaining a spatially uniform pressure in a flowing gas volume which is subjected to temporal pressure variations. This desired result is accomplished, with cooperating structural components (and gases therein) which eliminate the axial flow of a conditioning gas within the laser beam duct, by matching the time rate of change of the pressure of the flowing conditioning gas to the time rate of change of the pressure in the cavity of an operably associated laser beam turret.