Abstract: A hydraulic control system for controlling a plurality of remotely positioned hydraulically actuated underwater devices by a single hydraulic control line extending underwater. A reference hydraulic manifold is connected to the single control line and a signal hydraulic manifold is connected to the single control line. A pilot actuated hydraulic control valve is connected to each of the underwater devices controlling the flow of actuating fluid thereto. The pilot of each valve is connected to both the reference manifold and the signal manifold, but the pilot of each of the valves is actuated by different pressure levels in the signal manifold whereby the underwater devices may be controlled in a predetermined sequence by applying predetermined pressure levels to the single hydraulic control line. A pressure regulator is positioned in the control line upstream of the reference manifold to maintain the reference manifold at a predetermined pressure level.

Abstract: Waste water containing particulate matter is saturated with air or other gas by a dynamic mixer and ejected into a gravity filter system at a point above the filter media but below the water surface level. Upon entering the filter tank, the dissolved gas is released, forming small bubbles on filterable particles to float these particles to the surface for removal. The system further includes a back pressure valve at the sewage inlet port which, if obstructed, is automatically flushed. During the backwash cycle, the water level above the filter bed may be lowered to the level of a wash-through zone, and filtered water then pumped upward through the filter media, thereby carrying particles from the filter media out through the wash-through zone.

Abstract: A lubricated valve in which both seal rings which seal between a seat body and a wall of a recess in the flowway through the valve body to form a lubricant chamber between them are preloaded into sealing engagement by means including at least one washer type spring arranged within the lubricant chamber.

Abstract: A pressure relief safety device useful for operation in a low pressure range. The device utilizes a non-metallic relatively thin air-impermeable membrane extending across a housing, the latter of which is in communication with a system operable under pressure. When the pressure in the system increases beyond a predetermined threshold pressure level, the membrane will expand and contact a rupturable member which will rupture the membrane. In this way relief for the excess pressure conditions is obtained. The rupturable member is adjustably located with respect to the membrane to thereby adjust and vary the predetermined threshold pressure level.

Abstract: A mixing valve system for hot and cold liquids. A selectable temperature is controlled by mixing suitable parts of hot and cold liquid controlled by a plurality of disks having holes therethrough oriented in a particular manner to achieve the desired result. The system is composed of three stationary disks and two rotatable disks. Each rotatable disk is sandwiched between different pairs of the stationary disks. One rotatable disk controls the volume of flow and the other rotatable disk controls the amount of hot liquid that is to be mixed with the cold liquid.

Abstract: The disclosure relates to a gas and liquid flow control valve comprising a valve body having a bore therethrough, said bore having an inlet portion and an enlarged outlet portion separated by an annular shoulder portion, a gas inlet and a liquid inlet fixed to said inlet portion, said gas and liquid inlets being concentrically arranged with respect to each other, a first tubular valve element disposed in said outlet portion and being movable relative thereto between opened and closed positions, manually operated means exteriorly carried by said valve body and said first and second tubular valve elements, said means being selectively movable relative to said tubular valve elements whereby the same may be simultaneously moved between opened and closed oppositions, and said means including a first and second operator means for said first and second tubular valve elements, respectively, whereby one of said tubular valve elements may be operated independently of the other.

Abstract: This invention discloses a self-purging injection valve comprising at least one supply port, at least one purging waste port, an injection port and an injection port barrel, the injection port barrel projecting from the injection port through the valve in communication with said supply port and purging waste port, and a valve stem having an internal passage and being adapted to slide within the injection port barrel between a purging position and an injection position, to seal the injection port, to block the direct flow of materials within the injection port barrel external to the valve stem between the supply port and the purging waste port, but to otherwise permit the flow of purging fluids from the supply port along the internal passage and about the valve stem within the injection port barrel to the purging waste port when said valve stem is in the purging position and to open the injection port and to permit the flow of materials from the supply port within and without the valve stem to the injection po

Abstract: A valve assembly for valving abrasive fluids. A ball valve member is provided for rotation in a body member, the body member having inlet and outlet bores therein. Tubular inserts of abrasion resistant material - such as boron carbide - are provided in the inlet, outlet, and a bore through the valve member. The inserts are selected so that cooperating arcuate sections formed at the ends thereof are of a length greater than or equal to the diameter of the passageways through the inserts. Also the diameter of the passageways is preferably selected so that it is much less than the diameter of the ball valve member so that during throttling the angle of deflection of the abrasive flow will be small. A purge fluid may be injected under pressure in spaces formed between the ball valve member and the body and inlet insert.

Abstract: An underground valve has an operating rod extending above the ground which may be rotated to shut the valve off or turn the valve on. Difficulty with freezing prevents the valve operation at certain times during the winter months and by having the rod located within an external protective tube and sealed therein by a cylindrical element which is rotatable with the rod relative to the tube, whereby the operating rod for the valve can always be rotated since no ground water can get into the tube which extends below the frost line and above the ground.

Abstract: A vertically elongated hollow rectangular box with vertical walls and an open top and bottom has a downwardly and rearwardly extending slot in one side wall. The forward edge of the slot bears a series of arcuate rearwardly facing notches cut into the housing. A removable bar rides in the slot, and bears a knob exterior the housing. When a flexible tube or hose is placed along the rear wall in the interior of the housing, the bar gradually contricts its diameter as the bar is moved downwardly in the slot. The notches keep the bar in place.

Abstract: An assembly for explosively shearing material to form openings in contain and to separate attached elements comprises an explosive material positioned within a groove in a backing support adjacent one side of the material to be severed. A shear element located on the other side of the material has its shearing edge axially aligned with the centerline of the groove and explosive material. Upon detonation, the explosive pressure forcibly displaces the material against the shearing edge, severing the material without fragmentation.

Abstract: A valve suitable for connection to a vacuum sewer system and comprising a flow duct with a resilient wall which acts as a flow duct closing member. Outside the wall with respect to the flow duct there is a closed chamber connectable to suitable pressure sources in order to move the resilient wall by means of pressure between a flow duct closing and a flow duct opening position. In order to improve the closing movement of the valve the resilient wall is provided with a stiffener at the outlet side of the flow duct.

Abstract: A fluid control valve for a fluid system, such as an air conditioning system, in which a flow passage is defined by a radially flexible tubular member so that the flow area of the valve therethrough is variable. The tubular member and an encircling magnetic field producing means define an annular space therebetween containing a plurality of small iron particles which are attracted to an intermediate portion of the annular space when a magnetic field is produced, thereby causing inward movement of the flexible tubular member to decrease the valve's flow area.

Abstract: A valve body having a circular cylindrical shape may be made of plastic or any other suitable material. A radial hole through the wall of the body has a pressure inlet fitting positioned therein. A flexible tubing is passed through the body co-axial therewith. The tubing is folded back to overlie the ends of the valve body and a valve end tube is positioned to overlie the folded back ends of the flexible tubing. Clamps are utilized to impart inward radial pressure about the circumference of the valve end tube overlying the folded back tubing. The valve end tube is adapted to receive the ends of an inlet and an outlet flow conduit. Pressure of varying magnitude introduced through the pressure inlet fitting serves to meter the fluid flow through the conduit from a full flow to substantially zero flow as the flexible tube distends into the passage through the valve body.

Abstract: Actuator means of the pressure- and/or temperature-responsive type are disclosed for controlling valve means which supply pressure fluid (such as a combustible gas) to a load (such as a gas-fired boiler), characterized in that the actuator means are operable (1) when the boiler pressure exceeds a given limit, (2) when the boiler temperature exceeds a given limit, or (3) when the temperature a given region external of the boiler exceeds a given limit. The valve means is normally in an open condition, said actuator means being operable to close the valve means when at least one of the aforementioned limits is exceeded.

Abstract: The valve device adjustably controls air flow through a mechanical ventilation duct, blocks propagation of flames through the duct, and selectively exhausts smoke through the duct. An air extraction terminal sleeve communicates with the ventilation duct and is provided with an outwardly facing valve seat. A support is mounted in the sleeve inwardly of the valve seat and an elongated guide extends adjustably through the support. An obturator is mounted on the guide outwardly of the support for adjustably controlling the flow area into the terminal sleeve, and includes an outwardly convex dome member fixedly secured to the outer end of the guide, and an inwardly convex valve member having conforming seating engagement with the dome member and arranged to conformingly engage the valve seat to block flow into the terminal sleeve.

Abstract: A water operated control apparatus and method for operating a controlled device is associated with moisture sensing apparatus for sensing the level of moisture available at a location and operating the controlled device in response thereto. Moisture sensing means is disposed at the location and is adapted to selectively pass air therethrough when the level of moisture at the location falls to a predetermined level, or prevent the passage of air therethrough when the level of moisture rises to a predetermined level. A housing is operatively connected to the sensing means and to a supply of water. A diaphragm is disposed in the housing in a manner forming a chamber therein, the interior of the chamber being in fluid communication with air passing through the sensing means.

Abstract: A fire hydrant having a hydrant valve seat assembly positioned between the flanged lower end of the hydrant barrel and the flanged end of the hydrant shoe. The hydrant valve seat assembly and the hydrant valve element may be retained with the hydrant shoe when the hydrant barrel is removed and replaced or the hydrant valve seat assembly and the hydrant valve element, when in the closed position, may be retained with the hydrant barrel when the hydrant shoe is removed and replaced from the barrel. The fire hydrant includes an improved valve seat ring and seat ring housing, both of which may be made of brass so as to provide easy removal of the valve seat. The hydrant is provided with an improved drain valve facing strip for cooperating with the drain passage when the hydrant valve is open.

Abstract: A fire hydrant of the "dry" barrel type having an improved means of draining the barrel after the hydrant has been used and the main hydrant valve closed. The hydrant is provided with a drain passageway from the interior of the barrel above the main hydrant valve to the exterior of the valve. A first valve means, which is automatically opened or closed by actuation of the main hydrant valve element, is arranged to close the drain passageway when the main hydrant valve element is open and to open the drain passageway when the main hydrant valve element is closed. A pressure responsive one-way check valve in series with the valve means in said drain passage is automatically actuated to open position by pressure of water when there is water in the hydrant barrel and the valve means in series therewith in the drain passageway is open.

Abstract: The quick action slide valve comprises a valve casing and a sliding plate sliding in an annular groove in the product pipe. The annular groove in the product pipe is closed by a collar and at the side opposite to the sliding plate braking means are provided to stop the plate inelastically when the slide valve is closed. The sliding plate is provided on one surface with wedges which slide upon bolts in the annular groove when the valve is closed. Guide means rigidly connected with the valve casing protrude into a recess of the sliding plate when the slide valve is open. In the said recess at the end of the guide means a propellant charge is mounted which is ignited by ignition means running to the outside through the guide means when a certain pressure is exceeded.