Abstract: A device providing gas-powered logic responsive to a sensor such as a gas discharging type level probe and actuating valving controlling flow of liquid to be dispensed; and adapted to valving either for a volatile, especially cryogenic liquid utilizing the liquid's vapor pressure from a free gas space in a storage vessel top region as a power source both for control function and for the liquid transfer through a valve to a receiver, or with use of a separate gas supply for powering the probe, logic and amplifier, valving which applies liquid transferring pressure to a free gas space of a source vessel or vents the same for liquid transfer cut off, for volatile or non-volatile liquid.

Abstract: In a plural range pressure regulator construction having a spring for acting on a flexible wall of the construction to provide one pressure range for the regulator construction when the spring is in a certain position thereof and for being stored in a removable cap of the construction so that the spring will be in another position thereof and will not act on the wall so as to permit the regulator construction to provide another range thereof, the improvement wherein the spring has a spring retainer secured to one end thereof with the spring retainer being adapted to be snap-fitted onto a projection of the cap whereby the cap and spring are removed in unison from the housing when it is desired to change the operating position of the spring.

Abstract: A fluid valve especially adapted for manually controlling pilot valves and other fluid valves. The manual override valve includes an axially slideably movable plunger which is contained and recessed within a fluid passageway in the valve. Slide bar positioning means are included for holding the plunger in a predetermined axial position to control fluid flow through the fluid passageway. The slide bar and plunger are color coded for visual determination of the plunger position. For safety considerations, the override valve requires two-hand operation using a probe smaller than the override valve passageway in which the plunger is mounted.

Abstract: A condition responsive valve construction having a housing provided with an inlet and an outlet leading to and from a chamber therein. A self-contained valve seat and movable valve member unit is removably disposed in the chamber to control the interconnection between the inlet and the outlet. Condition responsive means are carried by the housing for controlling movement of the valve member relative to the valve seat in relation to the condition sensed by the condition responsive means. The self-contained unit is either a direct acting unit or a reverse acting unit while still being adapted to be operated by the same condition responsive means whereby the condition responsive valve construction can be either direct acting or reverse acting, depending upon the self-contained unit removably disposed in the chamber thereof.

Abstract: A valve for controlling the outlet pressure of a pump which supplies two systems. The valve permits flow through a first regulating portion to the primary system at a pressure equal to the secondary system pressure requirement. The secondary system preferably includes an accumulator and has an upper pressure requirement which is attained when the accumulator is filled. A second regulating portion of the control valve responds to secondary system pressure to permit bypassing of the first regulating portion when the secondary systems upper pressure requirement is satisfied. The second regulating portion closes when the lower limit is reached to permit refilling of the accumulator.

Abstract: An upstream fluid chamber adapted for fluid flow in a given direction is interconnected to a downstream fluid chamber by a plurality of individually actuatable digital valve elements disposed in a plane substantially transverse to the given direction so that the pressure drop across each valve element is substantially the same. The valve elements are disposed so the fluid from the upstream chamber passing through the valve elements converges in the downstream chamber to dissipate the vena contracta. The areas of the valve elements are weighted so the smaller areas follow a geometric progression while the larger areas deviate from a geometric progression. Preferably, at least the two larger areas are the same size. The valve elements themselves each have an orifice, a plug, and means for maintaining the plug in one of two positions. The plug seals the orifice in the one positon and lies outside of the fluid stream in the static fluid region in the other position.

Abstract: An apparatus for simultaneously, separately dispensing a multiple of fluids. The apparatus includes a chamber with a plurality of fluid inlets and a fluid outlet corresponding to each fluid inlet. A plunger is linearly movable in the chamber and has a plurality of spaced apart heads movable into blocking relationship between corresponding fluid inlet and outlet ports, and out of blocking relationship between corresponding fluid inlet and outlet ports to provide isolated fluid passages through the apparatus between corresponding inlet and outlet ports allowing coordinated movement of a plurality of different fluids through the apparatus. The heads and ports may be relatively sized and spaced to provide either simultaneous initiation and termination of multiple fluid discharge or staged initiation and termination of fluid discharge.

Abstract: A flow control device in a casing through which air passes comprises a baffle or threshold projecting from one inner wall of the casing toward an opposed wall and having an arcuate surface facing upstream, a plate or pressure plane disposed upstream of the threshold and mounted for rotation such that its downstream end moves parallel to the arcuate face of the threshold, and a hollow body disposed transversely of the casing and carried by the downstream end of the pressure plane for movement therewith so that the body serves as a closure member for the space between the free edge of the threshold and the opposed wall of the casing, the body having a transverse edge facing upstream and dividing the air flow into two streams one of which flows to an adjustable gap between the body and the opposed wall of the casing and the other of which flows to a fixed gap located between the body and the pressure plane.

Abstract: A butterfly valve comprising a housing in which a flat flap having an elastic rim is adapted to turn between a position in which the plane of the flap is parallel to the axis of the flow passage across the housing and a position in which the elastic rim is in sealing relationship to a seat arranged all around the axis of the passage across the housing, said seat having the shape of a cone surface, the apex of the cone being located outside the axis of the flow passage across the housing, wherein the sealing surface of the seat forms part of an oblique circular cone, the circular base of said cone being at right angles to the axis of the flow passage of the seat.

Abstract: A control valve controls fluid to and from a motor or the like from a rotary shaft and it includes a pair of stationary valve members facing each other and having facing annular channels therein. The annular channel of one of said stationary valve members communicates with a motor passage leading to the motor. The annular channel of the other stationary valve member communicates with a source passage leading to the fluid source and with a vent passage leading to atmosphere. A pair of plugs secured in this latter annular channel provides an arcuate source channel and an arcuate vent channel. A rotatable valve disc driven by the rotary shaft and arranged between the stationary valve members has a port therethrough which alternately communicates the annular motor channel in said one stationary valve member with the arcuate source channel and the arcuate vent channel in the other stationary valve member for controlling the fluid to and from the motor or the like.