Abstract: A self-cleaning valve for discharge of a pressurized dissolved air flotation aqueous treatment liquid from a high pressure reservoir to a low pressure body of liquid to be treated is provided. The valve includes a discharge head body adapted to be attached to a conduit supplied with pressurized treatment liquid which is provided with a central opening for discharge of a treatment liquid. The opening is controllable by means of a reciprocable cap positioned to reciprocate from a position whereon it restricts flow of liquid through the opening to a position wherein flow in unrestricted. The cap is attached to a reciprocable piston rod attached at its opposite end to a piston that is movable within an enclosed cylinder. The cylinder is provided with a port or opening on each side of said piston into which a source of pressurized air connectable to cause movement of the piston and thus opening and closing of the valve by selectively directing the flow of said pressurized air to either side of the piston.

Abstract: A distributor body comprises in its contact surface connection grooves which can communicate in different ways, according to the angular position of the body, with intake and outlet conduits. Rotation of the body is controlled by a motor. A stack of elastic washers acting upon a pusher ensures a suitable pressure of the contact surface against a homologous contact surface.

Abstract: A high pressure sluice knife gate valve, comprised of two identical body halves, which does not require a bonnet, but carries the features of a bonnet. This type of construction provides a number of advantages not found on prior art gate valves:(1) Because a bonnet is not needed, the use of a seal around the blade is eliminated, since the body itself contains the pressure.(2) The design minimizes the axial dimension of the chest cavity, thereby reducing stresses in the body. The body is, therefore, light weight and compact.(3) Depending on its size, this type of valve construction can be used for applications where fluid pressure is 300 PSIG and higher.(4) The liner in the valve is comprised of two identical halves. In addition to guiding, seating and wiping the blade, the liner also performs two other important functions:(a) Seals the components attached to the valve, including pipe flanges and valve actuating devices.

Abstract: A valve device and method for controlling the operation of the valve device, in particular a proportionally acting solenoid valve, consisting of a valve housing in which several pressure fluid chambers provided with pressure fluid connections are present, having two valves which are arranged within the valve housing and are providing with moveable valve members, the valve members being connected to a valve rod which serves for actuation.In order to simplify the construction of the valve, and provide reliable and reproducible detection and control of the valve opening cross section, two valves members (4, 5) and (12, 13) of the two valves are arranged coaxially and are jointly connected to a valve rod (20), actuatable simultaneously with it. A pressure fluid chamber is arranged between the valves.

Abstract: A compressed natural gas solenoid controlled valve is mounted in the threaded opening of a pressure vessel which contains the gas. The valve includes a valve body having a head which is exposed outside of the pressure vessel and a neck which is located within the pressure vessel. A solenoid poppet valve is mounted to the inner end of the neck. A valve seat is mounted in a bore within the valve body, and provides a flow passage which extends between an orifice at the inner end of the valve seat and an outlet port which is located in the head of the valve body. The solenoid poppet valve includes a seal for closing the orifice, a bias spring which biases the seal toward the seat to close the orifice, a plunger which is connected to the seal, and a solenoid coil which, when energized, moves the plunger so that the seal moves out of engagement with the seat and permits flow of compressed gas from the interior of the pressure vessel to the outlet port.

Abstract: A fail safe valve actuator is disclosed that is powered by an electric motor. A valve stem with a helical groove is moved in one direction by a ball nut rotated by the electric motor to move a valve member to its operating position. The valve member is held in operating position by a solenoid. When power fails, a spring moves the valve stem in the other direction to move the valve member to its fail safe position. A torque limiting device protects the electric motor from the high torque created when the valve stem abruptly stops moving when the valve member reaches its operating position. A centrifugal brake absorbs a portion of the energy released when the power fails and the valve stem is moved rapidly to its fail safe position by the spring.

Abstract: A rotary valve noise attenuator with a rotary ball control element and a noise attenuator member mounted in the ball having multiple, elongated, substantially enclosed channels formed across the valve opening to split the flow stream into several smaller flow streams. The channel walls are perforated so each smaller flow stream is further dispersed and diffused into many minute flow streams after entering the channel. A noise attenuator constructed of several corrugated sections fixed crest to crest to form several diamond shaped channels across the valve opening each having four side walls with holes.

Abstract: A spool valve has a valve body with an elongated cylindrical bore therein. Fluid passageways extend in a radial direction through the valve body and communicate with the interior bore. A peripheral port edge is defined by the intersection of the bore and the passages. A cylindrical valve spool is slidably mounted in the bore to close and open the passageways with respect to the bore. The valve spool has a cylindrical outer surface and at least one planar circular surface with a peripheral metering edge therebetween. The peripheral metering edge has a plurality of tapered notches therein which are adapted at times to overlap the peripheral port edge to permit fluid flow between the bore and the passages.

Abstract: A solenoid controlled valve is mounted in a threaded opening of a pressure vessel which contains compressed natural gas. The valve includes a valve body having a head, which is exposed outside of the pressure vessel, and a neck, which is located within the pressure vessel. A solenoid poppet valve is mounted to the inner end of the neck. A valve seat is mounted in a bore within the valve body. An orifice at an inner end of the valve seat exposes a flow passage between the bore of the valve body and an outlet port, which is located in the head of the valve body. The solenoid poppet valve includes a seal for closing the orifice, a bias spring which biases the seal toward the seat to close the orifice, a plunger which is connected to the seal, and a solenoid coil which, when energized, moves the plunger so that the seal moves out of engagement with the seat and permits flow of compressed gas from the interior of the pressure vessel to the outlet port.

Abstract: An ejector for an objector product sorter is disclosed which, in one embodiment, has a solenoid with a coil having a hollow center through which air flows and, in one aspect, has a relatively small air reservoir space to increase ejector accuracy. In one embodiment, balanced air flow provides for uniform travel of a valve seat cover, further increasing accuracy and efficiency.

Abstract: An arrangement for heating the passenger area of a vehicle. To increase the heating efficiency without requiring the use of more fuel, disposed upstream of the exhaust gas heat exchanger is a catalytic converter that particularly during idling and in a partial load range provides additional thermal energy via secondary combustion of unburned hydrocarbons. To regulate the heat flow that is transferred to the warm water circuit, an exhaust gas diverter is provided that can be controlled by thermal-lug switches in such a way that when heat is required, it can divert the exhaust gas through the exhaust gas heat exchanger or, when too much heat is being supplied from the cooling water and the exhaust gas, the exhaust gas is conveyed directly to the atmosphere via the muffler.

Abstract: Electric switching solenoid valve (1) with a valve piston (9) guided in a valve housing (12), which valve piston (9) can be moved from one switching position to another switching position by a magnet armature (18) arranged in an electric coil (15). The coil (15) has coil areas (16, 17) assigned to the various switching positions of the solenoid valve (1). The coil areas are acted on by the current only during the switching operation, and the valve piston (9) is protected in the particular switching position reached by at least one holding device (19) arranged in the valve housing (12).

Abstract: A control valve for fluid media has an adjusting piston which is displaceable by a drive and whose face end can be seated against a valve seat. The adjusting piston and the drive are disposed in a valve housing which is completely filled with fluid. The adjusting piston is formed by a hollow body through which fluid can flow on both sides in the direction of its axis, and the hollow body surrounds a cavity. The cavity is sealed by a first sealing member extending transversely of its axis against the valve housing, and by a second sealing member which extends against a dividing wall which is contained in the cavity and is displaceable in a direction of the axis. The valve housing is filled on one side of the first and second sealing member facing away from the valve seat with an incompressible hydraulic protective fluid.

Abstract: A magnet system for an outwardly opening magnet valve having a core winding, an armature carrying the valve body, and a permanent magnet disposed symmetrically to the winding. The closed magnet circuits of the electromagnet and permanent magnet partly overlap, and a ring of ferromagnetic material is associated with the permanent magnet 1 in the magnet circuit of the electromagnet, this ring absorbs half the flux I of the permanent magnet, and the magnet circuit for the electromagnet is dimensioned to one-half the permanent flux.

Abstract: A radiant heating system for a greenhouse utilizing radiator tubing formed from substantially gas impermeable plastic material. The system includes a radiator tube disposed overhead and formed from light transmitting material so that sunlight projecting into the greenhouse will be substantially transmitted to the plants grown thereunder and a second radiator tube disposed proximate the greenhouse floor and formed of similar plastic material. The radiated tubes are interconnected at one of their ends and a burner communicates through a manifold connected to the other ends of the radiator tubes to transmit a heated effluent through the tubes. Valve means and exhaust means are associated with the manifold.

Abstract: An improved control valve assembly that resists plugging by fluids contaminated with sticky solids, e.g. sludge or particulates, comprising a valve containing a modified valve trim having a stepped cross-section rather than a continuous taper created by reducing the diameter of the valve stem at a point on the stem corresponding to a position of 90 percent open, so that the modification causes the flow area to suddenly increase drastically when the valve opens to 90 percent open in response to flow falling below a predetermined setpoint.

Abstract: A fluid flow controller comprising a flow passage which is opened and closed by the flexing of a diaphragm secured at its periphery characterized in that the diaphragm is a laminate of a plurality of metal diaphragms and in that friction reducing material is provided between the diaphragms.

Abstract: A flow control valve includes a body having a spherical hollow central section into which a spherical central body fits. Three fluid flow conduits are attached to the central section and two flow ports are defined in the central body with a flow passsage connecting the flow ports together. A control knob is attached to the central body and is used to move the central body from one orientation fluidically connecting one fluid conduit to a second fluid conduit to a second orientation fluidically connecting the one fluid conduit to a third fluid conduit. A flow selection plate having a plurality of notches defined therein is slidably mounted on the central section so various amounts of flow can be selected. The flow control valve can be used in a fluid circuit connecting a fluid source to various ones of a plurality of fluid flow driven subsystems.

Abstract: A mobile heating system for thawing frozen ground. The system includes a hot water heater, antifreeze reservoir, and pumps mounted on a mobile apparatus such as a trailer for being towed by a car or truck. A line is connectable to the heater and antifreeze reservoir and includes a plurality of elongate heater probes for being implanted in the ground, adjacent a frozen water or sewer line. Circulation of hot water through the line and probes thaw the ground. Alternatively, the probes may be used to heat building material such as bricks.

Abstract: In a ball valve wherein the rotation of a ball (1) provided in a valve chest (8) opens and closes a valve, an orifice (4) is provided in a passage (3) of the ball, and communicating passages (5) connecting the upstream side of the orifice (4) with the valve chest (8) and communicating passages (6) connecting the downstream side of the orifice with the valve chest (8) are provided. The passage (3) provided in the ball (1) has a large aperture at one end (30) and a small aperture at the other end (31), the respective communicating passages (5) (6) are formed so as to communicate the passage (3) with the valve chest (8) when the valve is opened, and the aperture of the passage (32) whereat a seat carrier (11) of the small aperture side of the ball faces the ball is made substantially the same as the aperture of the small aperture side end (31) of the passage of the ball (1).