Abstract: The present invention relates to a valve including a valve member co-operating with a seat provided with a crenellated portion disposed around the portion of the seat on which the valve member rests, said crenellated portion being constituted by teeth separated by gaps, the inside walls of the teeth being portions of a vertical axis cylinder, the width l of the gaps being less than the width b of the inside walls of the teeth, wherein the end wall of the valve member facing the crenellated portion when the valve member is in its closed position is convex in shape, co-operating with the inside wall of each tooth to form a channel that flares from top to bottom of the tooth, the point of contact C between the valve member and the seat being at a distance d from the base B of the crenellated portion lying in the range 0.25 times to 0.5 times the width l of the gap. Vibrations are eliminated at partial load and pressure fluctuations downstream from the valve are reduced.

Abstract: A gate valve adapted for stem back seating has a stem and bonnet assembly with a rotatable bearing ring to which the stem is releasably fixed during normal gate opening and closing operations. During back seating, the stem is released from the bearing ring and the bearing ring is fixed to the bonnet cap, enabling low torque back seating by rotation of the stem relative to the bearing ring and bonnet cap.

Abstract: The invention is directed to a magnet valve having a magnet coil and a magnet armature, which are coaxially surrounded by a secondary coil that measures the inductions arriving in the magnet coil. According to the invention, those inductions that arise in the magnet coil not only from a current flowing there but also by the motion of the magnet armature in the magnet coil are measured while the current is turned off. As a result, the instant at which the magnet armature begins its return stroke is detected exactly.

Abstract: Described is a microvalve comprised of a movable spool and/or seat comprising a silicious spool having three planes, e.g. three planes aligned with all of the spool's planes, and a silicious seat conforming to the spool's planes. The spool and/or the seat may move to open or close the valve.

Abstract: An electromagnetic valve assembly having upper and lower modules. A standardized lower module can be joined with one of several upper modules having a different axial length for varying the magnetic field strength of a coil arrangement in the upper module without changing the length or position of an armature tube in the lower module.

Abstract: Water valve apparatus with distal control includes at least one valve for controlling flow of water therethrough and having a movable actuator for starting and stopping the flow of water. A permanent magnet, disposed proximate said actuator for magnetic engagement therewith, is provided for moving the actuator between a first position stopping water flow through the valve and a second position allowing water flow through the valve. A movable member is provided to alter the magnetic engagement between the permanent magnet and the actuator in order to move the actuator. A cable, having a slidable center wire attached to the movable member and a sheath attached to the valve is connected to a manually operable lever, for operating said cable in a manner causing movement of the movable member and concomitant movement of the actuator, as a result of magnetic engagement alteration, in order to start and stop water flow through the valve.

Abstract: A fluid flow regulating valve adapted to prevent the operation of the valve from violent pressure change, namely the hydraulic ram effect, in the fluid, particularly during closing and opening of the valve, the valve comprising a casing that houses a regulating plate slidably mounted within the casing. The plate has a regulating orifice having a variable fluid pass section which decreases from an end to another end of the orifice. The orifice is adapted to be aligned, through its different sections, with inlet and outlet ports provided in the casing, whereby the inlet and outlet ports communicate to each other through the orifice and the fluid flow can be regulated by those different sections of the orifice.

Abstract: A flow distribution method and apparatus is set forth for reducing noise and vibration immediately downstream of a noise creating device such as a partially open or closed valve element. Partially open valve elements typically create a quarter moon distribution of highly turbulent flow. The present apparatus contemplates positioning of the inlet ends of a plurality of tubes immediately downstream within the flow region of the quarter moon area to gather the turbulent flow into a plurality of small tubes. The tubes are routed along a pipe section to different areas or points in the cross sectional area to discharge the flow. The several tubes collectively smooth the fluid flow through the structure. A method is also set forth. In one alternate embodiment, the downstream end of the pipe section is larger than the inlet end, and in another version, the individual tubes are provided with enlarged outlet ends.

Abstract: Keys on legs of a U-shaped stator are in keyed engagement with keyways on diametrically opposite sides of the O.D. of the sidewall of a valve seat member to axially and circumferentially locate the seat member.

Abstract: A fluid control valve, which allows selective change of the flow rate of fluid through the valve in the face of high temperatures and high pressures without undue wear to the integral downstream sealing seat, includes a body, having a passageway which consists of a first section and a second section, and a ball disposed in the second section of the passageway. The ball is rotatable around a central axis and has a first through hole of one diameter and a second through hole having a minimum diameter which is smaller than the first diameter. A sacrificial annular upstream seat is disposed upstream from the ball and has an internal diameter smaller than both the diameter of the first through hole and the diameter of the first section of the passageway through the body.

Abstract: The invention relates to a mixer valve for hot and cold water having a cartridge-type body enclosing two overlapping plates one of which is fixed and the other movable on the fixed one through a control rod and in which the fixed plate has a mixing chamber (20, 20') with an antinoise structure (22) which only covers the internal lateral surfaces of the chamber itself, said antinoise structure (22) being made from a net element (23) or from protuberances or rough parts formed in the chamber itself.

Abstract: A valve assembly includes a housing having at least one valve orifice for fluid flow therethrough, and a valve member which moves between a fully closed position and a fully open position, respectively, closing and opening said valve orifice. The valve orifice has a clearance surface forming an auxiliary valve passageway selectively enabling flow communication therethrough in an intermediate position of the valve member between said fully open and fully closed positions, and in the intermediate position the valve member partially obstructs the valve orifice so that the passageway provides attenuated fluid flow communication through the valve orifice relative to fluid flow communication in the fully open position of the valve member. A manually controlled actuator enables limited displacement of the valve member between the fully closed position and the intermediate position for the attenuated flow communication through the valve orifice.

Abstract: A rectilinear motion proportional solenoid assembly includes a cylindrical housing containing an electromagnetic coil having a longitudinal coaxial bore. The housing contains magnetic material for providing a flux path for the magnetic field produced by the coil. A generally cylindrical magnetic pole piece element is inserted into the bore and a movable armature assembly of magnetic material is supported within the bore for movement along the longitudinal axis of the coil by a pair of thin, flexible suspension springs. One of the springs is located within the bore adjacent to one end of the magnetic pole piece whereat an axial gap between the pole piece and the armature is formed. A second spring is located within the housing within the vicinity of a radial air gap between the armature and the housing.

Abstract: An expansion valve (10) for heat transfer systems such as an air conditioning system, includes a control element (20) for controlling the flow rate of working fluid through the valve. The control element has a stem member (28) and movable member (42) movable on the stem member. Openings (38) to an internal passage (30) in the stem member are regulated by positioning the movable member to achieve regulated flow rate of refrigerant material through the valve. The movable member of the control element is moved by a plunger (24) of a proportional solenoid (22). The proportional solenoid has a magnetic flux circuit including a low permeance isolation tube (62) surrounding the plunger, which enables removal of the coil (76) and frame (78) of the solenoid from the valve. The solenoid further includes a variable permeance flux washer (69) the flux through which varies with plunger position, which is disposed from a gap (82) which provides an area of magnetic saturation.

Abstract: An improved slide plate diverter valve having a manifold block and a backing plate with a linearly reciprocable slide plate sandwiched and clamped therebetween is provided with side rails between the manifold block and backing plate along opposite lengthwise sides of the slide plate secured by dowel pins to each thereof to rigidify the manifold block and backing plate against relative movement, eliminating any tendency of the backing plate to move relative to the manifold block in response to sliding actuation of the slide plate.

Abstract: A solenoid-actuated three-way fluid control valve having a paramagnetic valve body and a ferromagnetic adjustable end stop connected by a ferromagnetic tubular sleeve and forming a housing defining a valve chamber containing an axially elongate generally cylindrical ferromagnetic solenoid plunger supported for axial reciprocal movement between a pair of axially opposed valve seats. The plunger is biased toward seating engagement with an associated one of the seats and is moveable out of seating engagement with the one seat and into seating engagement with the other seat in response to energization of a surrounding solenoid coil. An annular ferromagnetic flux ring disposed adjacent one end of the coil cooperates with a diametrically enlarged portion of the plunger to define a portion of a flux path. The position of the end stop relative to the sleeve is adjusted during manufacture to set the clearance between the valve plunger and the one valve seat thereby enabling accurate valve calibration.

Abstract: An improved low-noise rotary control valve is disclosed. Such valve includes a valve body (10) and a rotatable ball (12) mounted within the valve body. The improvement includes an upwardly extending diverter (28) in the entry flow passage (15) of the valve body (10). A downwardly extending diverter (30) is disposed on the leading edge of the upper half (50) of the valve (12). Such diverters (28, 30) provide only small impedance to flow when the rotary control valve is in the full open position, but provide a tortious path for fluid flow through the valve (20) when it is partially closed. Such tortious path of the fluid inhibits vortex formation within the flow passage of the valve (14) with the result that vibration and noise are reduced. A third impediment placed in the outlet flow passage (16) extends upwardly from the valve and inhibits vortex formation downstream of the valve.

Abstract: A pressure control valve has a substantially closed housing, an armature provided with an integrated valve body, a valve seat with which the valve body cooperates, a spring acting on the valve body so that the valve body cooperates with the valve seat, an electromagnet arranged to adjust a control pressure. The magnet armature is somewhat bucket-shaped. A projection extends in an interior of the housing and operates for guiding a magnetic flux. The magnet armature surrounds the projection and is mounted on the valve body in a friction-transmitting manner. A second spring acts on the valve body so as to counteract an action of the first mentioned spring.

Abstract: A hydraulic magnetic control valve includes a base with an inlet and an outlet. A plug provided with a second magnetic member formed thereon is arranged above the outlet of the base for controlling the hydraulic flow, and the top surface of the base is mounted a driving motor. One of the side walls of the base is in a form of a slanted side wall, on which a first magnetic member is slidable upward or downward along the slanted side wall under control of the driving motor. When the first magnetic member slides downward along the slanted side wall, the control valve is in open situation permitting hydraulic material flow from the inlet to the outlet, while the first magnetic member slides upward along the slanted side wall, the control valve is in closed situation thereby stopping up the flow.

Abstract: This invention reduces the size of the solenoid section of the control valve and simplifies its mechanism. In particular, the invention is intended to enable the control of a variable capacity compressor. In the differential pressure section B.sub.1, a path is formed between a compressor's P.sub.c pressure introducing port 15c and a suction side. In this path a P.sub.c valve disc 17 is installed which engages with or disengages from a valve seat 15e.sub.2 formed in the path on the suction side of a valve opening 15e.sub.1. The P.sub.c valve disc 17 is urged by an adjust spring 20 to close the valve opening. In the solenoid proportional control section B.sub.2, a plunger chamber R.sub.3 is formed which has a P.sub.d pressure introducing port 15g. A plunger 24 is movably installed in the plunger chamber R.sub.3 and is fitted with a connecting rod 25, which passes through a through-hole 15d.sub.1 in the solenoid proportional control section B.sub.2, the P.sub.