Abstract: A combination valve has a pneumatically actuated shut-off valve integrated in a valve housing and operative for blocking and releasing a flow between a valve inlet and a valve outlet. The shut-off valve has a valve member which is spring loaded in a valve closing direction. A check valve is integrated in the valve housing, provides blocking of the flow from the valve outlet to the valve inlet and has a closing member formed by a flat spring. A stroke guard limits an opening stroke of the closing member. The valve member of the shut-off valve is arranged at a side of the flat spring which faces the valve outlet and forming the stroke guard of the check valve. A valve plunger is axially guided in the valve housing and centrally extending through the flat spring, and control piston with which the valve member is connected through the valve plunger is loaded with a suction pressure for opening the shut-off valve and ventilated for closing the shut-off valve.

Abstract: A pressure relief valve includes a fluid flow channel (6, 19, 21) through which an initial flow of fluid passes in use, and a valve opening member (23) responsive at a predetermined fluid pressure to open the valve (13) and allow an increased fluid flow therethrough. The valve opening member (23) is located substantially centrally in the fluid flow channel (6, 19, 21) to ensure it is always exposed to the fluid flow. Part of the flow channel (21) is formed by part of the valve (13). The valve opening member (23) and flow channel (21) are elongated and parallel. A screen (13) on the valve screens the outlet end of the channel (21) from the fluid inlet port (6).

Abstract: A flow amplifier (1) with an inlet (4) and an outlet (5) is provided, between which a first branch (6), through which a flow of a fluid to be amplified is flowing, with a first throttling device (8), the throttle resistance of which is adjusted in dependence on the pressure across and by the flow rate through the first throttling device, and a second branch (7) with a second throttling device (11), the throttle resistance of which is adjusted in dependence on the throttle resistance of the first throttling device. In a flow amplifier of that kind, the amplification factor is intended to be made independently of pressure losses in the generation of the flow to be amplified. For that purpose, at least one pressure-divider (14, 15; 17, 18) with a central take-off point (16; 19) is provided, which is supplied by a pressure difference between inlet (4) and outlet (5), the pressure at the central take-off point (15, 19) controlling the flow rate through the second throttling device (11).

Abstract: A valve for a pipe system wherein liquid circulates is intended to be controlled dependent on the liquid temperature within the system by means of a thermostat adapted to actuate an electro magnet which, on its part, dependent on whether it is current-carrying or not, is adapted to retain the valve spindle in a position corresponding to open or closed valve position, respectively. The valve housing has plate-shaped seat body having a large central through-going flow opening and a number of smaller corresponding openings closer to the circumference. A spring-loaded first valve body is displaceably arranged on the spindle and cooperates with the central opening of the seat body in order to close/open the opening, a concentrical, spring-loaded hollow piece constituting a second valve body which also is displaceably arranged on the spindle cooperating with the peripheric openings via an annular flange portion in order to close/open the last-mentioned openings.

Abstract: A vibration responsive gas shut-off valve assembly which is highly effective in conditions which give rise to excessive vibration such as earthquakes and the like. The shut-off valve assembly is inserted into a gas line leading from a source of gas to an interior of a building such a dwelling structure. The valve assembly comprises a spherically shaped ball which may be located within the gas line and which contains a gas passage channel extending therethrough. When the Mall is in a first position, gas will flow from one side of the ball through the channel and to the other side of the ball in the gas line. When the ball is in a second position, the channel is located so that one side is vented through an orifice in the pipe and the other side is in communication with the downstream side of the pipe such that gas in the downstream side of the pipe leading to the building can be vented.

Abstract: A sealing means and sealing valve 10 for container openings is formed from a housing 11, 12 in which a seal 13 is arranged. The seal 13 closes a gap between the housing portions 11, 12. The housing portions 11, 12 exhibit bores 14, 14' and 15 through which a fluid can flow through the housing portions 11, 12, as long as the seal 13 opens up a gap. The seal 13 exhibits a sealing bead 20, which lies across from the spring-bead 22, 23, 24.

Abstract: A rotary flow control valve is provided, that, despite compact design, offers excellent vibration resistance, a high response speed, and superb proportionality of a controlled flow rate to an applied current value. In a channel selector 4 in a rotary flow control valve 1, a guide valve 2 mounted in a hollow of an inner housing 6 is borne by bearings 19 and 20 so that the guide valve 2 can rotate forward or in reverse. Intra-outer housing tubes 10, 11, and 12 are formed in an outer housing 5. In the inner housing 6, communicating channels 13 to 16 are formed in fours at symmetric positions with respect to the rotation center of the guide valve 2. In a torque motor 3, permanent magnets 33 are attached to a lower armature 32 coupled with the guide valve 2 using an adhesive. The magnetic poles at both ends of the permanent magnets 33 are opposed to cylinders 43 about which coils 34 are wound.

Abstract: A vibration responsive gas shut-off valve assembly which is highly effective in conditions which give rise to excessive vibration such as earthquakes and the like. The shut-off valve assembly is inserted into a gas line leading from a source of gas to an interior of a building such a dwelling structure. The valve assembly comprises a spherically shaped ball which may be located within the gas line and which contains a gas passage channel extending therethrough. When the ball is in a first position, gas will flow from one side of the ball through the channel and to the other side of the ball in the gas line. When the ball is in a second position, the channel is located so that one side is vented through an orifice in the pipe and the other side is in communication with the downstream side of the pipe such that gas in the downstream side of the pipe leading to the building can be vented.

Abstract: A solenoid valve assembly including a diaphragm assembly which is conformed to the poppet and which moves therewith. The poppet is integral with or mounted to the pole piece of the solenoid. The poppet is shaped to conform to the shape of the valve seat. The valve seat has an annular groove to allow flushing of the valve in both open and closed positions.

Abstract: A top-entry check valve having a seat, cage, disc and removable bonnet utilizes threaded fasteners to prevent movement of the seat, cage and disc in the downstream direction. An annular shoulder in the valve body prevents movement of the seat, cage and disc in the upstream direction. The disc has a hinge pin which is cradled in hinge pin supports of the cage. Removal of the bonnet allows access to the valve chamber for replacement of the seat, cage, disc or threaded fasteners.

Abstract: The present invention refers to a control valve provided with a valve closure member (5) for closing and opening a valve opening. The valve closure member (5) has attached thereto a piston (11), which is arranged such that it is movable within a housing (13), said piston (11) being adapted to be acted upon by the force of a spring (spring 27) in one direction and by a fluid pressure in the opposite direction. A property characterizing the present invention is that the length of the path of movement of the piston (11) can be adjusted with the aid of a positioning means (29, 73). In accordance with a preferred embodiment, the positioning means (29) consists of a rod (31), which is adapted to be axially moved in the direction of movement of the piston (11).

Abstract: A flow control valve having a piston and valve element connected together by a portion of a spring also connected to a pressure relief mechanism. Also disclosed is an alternative embodiment featuring a passage delivering metered flow from an input passage to a low pressure end of a piston and then through a pressure sensing means from the low pressure chamber to an output passage. A valving sub-assembly is movable to substantially suppress the flow rate ripple by bypassing a dominant portion of the flow rate ripple.

Abstract: A flow control valve (10) is provided including a valve body (20) and a piston (16). The valve body (20) has extending therethrough a longitudinal bore (18) defining a first flow passage (32). The piston (16) is slidably disposed within the bore (18) to vary the flow area of a fluid flow through the control valve (10). The piston (16) contains a second flow passage (28) defined by a side wall (68) and an end wall (70). The side wall (68) has at least one longitudinal flow channel (24) with a first orifice (26) extending therethrough. The piston (16) preferably slides within the longitudinal bore (18) to vary the flow area of the first flow passage (32) such that the fluid flow through the control valve (10) is substantially constant over a selected range of pressure differentials across the control valve (10).

Abstract: A replaceable flapper and keeper assembly for a fluid check valve. The assembly may be part of a larger replaceable seat ring assembly or be adapted to be secured directly on an integral check valve seat. The flappers have hinge brackets and are pivotally attached to a hinge pin that extends through holes in keepers. The flappers are adapted to be moveable in the direction of the valve axis (or normal to the plane of the flappers when in closed position) by having the holes in their hinge brackets elongated only in this direction. The flappers are able to move downstream of the seat before opening, minimizing wear and damage. Flapper, keeper and hinge pin are easily replaceable.

Abstract: A hydraulic pressure control valve, such as a pilot-operated relief valve and such as a direct-acting differential piston relief valve, having a spring chamber pressurized with fluid from a passage though a movable relief piston. The fluid within the spring chamber may be at the same pressure as that at the inlet valve closing pressure to assist a coil spring acting against the inner face of the relief piston. Inlet pressure in the valve working on an area difference between the faces of the relief piston produces the hydraulic force which is opposed by the spring to open the valve. At its other end, the spring transmits force against a movable biasing piston immediately adjacent a closed end of the spring chamber. The biasing piston provides automatic linearly increasing adjustment of the set pressure in response to inlet pressure acting over a greater net area than that of the relief piston.

Abstract: A vent valve for a transport tank car is actuated by pressurized air from the tank cars brake system. The valve is opened by this pressurized air to permit flow of air, through a vent passageway, into or out of the tank. A bellows isolates the pressurized air system from the flow of air in the vent passage so that the braking air system will not be adversely affected by vapors from hazard products loaded in the tank.

Abstract: A discharge valve apparatus for a compressor includes a valve plate with a port opened, a lead valve fixed on the valve plate, adapted for swingably opening and closing the port elastically, and including a substantially disk-shaped head portion and a neck portion constricted continuously from the head portion, and a retainer fixed on the valve plate, and including an inclining surface adapted for regulating the opening degree of the lead valve, the inclining surface having an inclination varying around an area where the retainer is brought into contact with the head portion of the lead valve when the lead valve fully opens the port. With the discharge valve apparatus, the lead valve can be inhibited from adhering on the retainer through the lubricant contained in the refrigerant, and accordingly the volumetric efficiency deterioration, resulting from the retardation of the lead valve in the returning, can be inhibited.

Abstract: A dual-head flow controller having a positive-head and a negative-head for supplying a sample fluid from a source to a restriction at a constant rate, with the magnitude of the negative head about the same as that of the positive head, independent of the pressure of the source fluid. A positive-head tube having a distal open end connects for fluid communication with the supply. The positive-head tube extends a first predetermined distance above a mean elevation of the restriction in the measuring chamber. A negative-head tube communicates fluid from the restriction to a distal open end. A portion of the negative-head tube extends downwardly a second distance below the mean elevation of the restriction. The fluid, being communicated in response to the combined head pressures, flows at a constant rate through the restriction, independent of changes in the pressure of the source fluid.

Abstract: The present invention relates to a method for transferring a multiphase effluent whatever the value of its gas phase/liquid phase volumetric ratio GLR may be. The value of the GLR is determined by means of a measuring device D, before it reaches a separation tank, when the measured value of the GLR is greater than a boundary value, part of the gas phase is discharged through compression means in connection with the tank, as long as the level of the liquid-gas interface in the tank is below a threshold value.

Abstract: An improved selector valve includes a sealing disc with a sealing face biased against an opposed sealing face of a port plate. The sealing disc has a blind slot located in the sealing face which communicates with an outlet port and a single selected inlet port on the port plate, while simultaneously sealing off all other inlet ports. Detents define the angular radial disposition of the slot for indicating which inlet port is selected. A venturi eductor has a suction passage sealed directly to the port plate outlet for connecting the venturi directly to a selected inlet port.