Abstract: There is disclosed a pressure-compensated mixing valve of the diaphragm and reciprocating piston type, wherein a flexible connection between the diaphragm and the pistons is provided. This flexible connection affords a self-alignment of the pistons in water inlet passages. In a preferred manner, this is used with a mixing valve providing alignment of a ported ring member that also provides in part an internal stop feature.

Abstract: A quick coupling component including at least one valve member. A pressure reduction channel is provided in at least one valve member. A pressure reduction member is arranged in the pressure reduction channel. The pressure reduction member includes a shut-off element arranged in the pressure reduction channel. A seat includes a seat surface, wherein in a closed position a first portion of the shut-off element surface bears against the seat surface. The seat surface substantially corresponds to the shut-off element first surface portion. The seat surface includes a degree of fineness substantially corresponding to a degree of fineness of the shut-off element. At least one of the seat and the shut-off element is formed of a material having a hardness substantially exceeded by a hardness of another of the seat and the shut-off element.

Abstract: A fluid pressure control device having a housing formed with a bore and a solenoid valve mounted in the bore. The solenoid valve has a frame of a magnetic material mounted in the bore. The frame and thus the solenoid valve are mounted in the bore of the housing and secured in position by a pin received in a hole formed in the frame and supported by the housing. This eliminates a seating plate for securing the solenoid valve against the housing. This contributes to a compact design, light weight and lower manufacturing cost.

Abstract: An excess flow control valve for telescopical receipt in a cylindrical fluid distribution pipe to control downstream flow therein. The excess flow valve includes a cylindrical pressure reducer fitting for mounting the valve in the pipe and is formed with an upstream facing annular valve seat and a downstream diverging venturi nozzle therethrough. A poppet valve barrel having a central chamber is mounted to the pressure reducer fitting, the chamber formed with a plurality of peripheral inlet flow passages disposed upstream of the fitting and further including at the upstream end thereof, a gland. A poppet having an cylindrical base and an upstream projecting stem is slidably received in the chamber and the stem is received in the gland. The stem includes a stop ring at the upstream end thereof and a compression spring is disposed over the stem in an interposed relationship between the valve barrel and the stop ring to bias the poppet away from the valve seat.

Abstract: A flow control device in which a flow channel includes a flow control member in the form of a domed disk with legs by which the disk is seated to seal the channel. The control member can be acted upon by an internal actuator or plunger that extends into the flow channel where the plunger can be engaged by an external member such as a Luer fitting. The actuator or plunger may be of rigid or flexible construction.

Abstract: A multi-function valve for installation in a riser of a sprinkler system provides two valve functions. One function is to stop flow automatically when breakage of a sprinkler head causes the flow rate to exceed a predetermined threshold. The second function is to prevent back flow and reduce the risk of the "hammer effect" causing damage to the sprinkler system.

Abstract: A poppet type excess flow valve comprises a body forming a valve chamber having a first portion of a first diameter adjacent a first end and a second portion of a second smaller diameter adjacent second end. A valve seat is located between the first and second portions of the valve chamber. A poppet element is mounted in the valve chamber and includes a first section in the form of a hollow cylindrical body extending into the second portion of the valve chamber and terminating therein in an open end. The outer diameter of the hollow cylindrical body section is only slightly less than the diameter of the second portion of the valve chamber for guided sliding movement therein. The poppet element further includes a second section located in the first portion of the valve chamber and including an end wall carrying a valving surface extending radially outward for cooperation with the valve seat.

Abstract: A fluid flow control valve actuated by a solenoid to selectively position the valve by balancing electromagnetic forces, spring forces and fluid forces within the valve. The valve includes a plurality of flow control orifices in series that provide flexible dual slope flow performance characteristics, precise flow control and high flow capability directed to use as a vehicle's evaporative emission control system purge valve.

Abstract: Pressure limiting valves intended for use in underground mining and tunnel construction are able to release the pressure medium discharged if an overload occurs without problems into the return line, since the occurring back pressure is directly neutralized in the pressure limiting valve. For this purpose a discharge of the pressure medium is provided even before the spring chamber, for which purpose the crossbores arranged there are constructed in such a way that they expand, forming a water chamber with increased volume. This water chamber is located in ring form around the valve piston that is exposed in this area and is connected via return bores to the return line. The water chamber with accordingly large volume makes it possible that the back pressure acts simultaneously on the spring and the valve piston, so that the described neutralization takes place.

Abstract: A push button flow stop is mounted on a disposable infusion pumping cassette provided for use with a drug infusion pump. The flow stop is operative to enable or to block fluid flow through the cassette in a first mode and to monitor fluid pressure in the cassette in a second mode.

Abstract: A trigger operated air valve suitable for controlling both the flow of air to and the flow of feedback air from a nozzle assembly in high volume low pressure (HVLP) spray guns. A trigger moves a spindle against the pressure of a spring. As the trigger is moved, a first valve is opened to initiate a main flow of air to the spray gun nozzle assembly prior to opening a second valve which initiates the flow of feedback air from the nozzle assembly. When the trigger is released, the second valve is closed to terminate the flow of feedback air prior to closing the first valve to terminate the main flow of air to the spray gun nozzle assembly.

Abstract: The present invention provides a flow control valve which makes it possible to prevent the leakage of hydraulic fluid when the valve is closed while continuously controlling the flow rate. An axially slidable piston (12) housed in a housing (11) provided with a first port (13) and second port (16) is urged by an electromagnet (20). A first closing valve (14) for connecting and isolating the first port (13) and first fluid chamber (A), with a valve seat portion (14C) opened opposite one end portion of the piston (12) in the first fluid chamber (A) and a valve body (14B) which is seated in and separated from the valve seat portion in accordance with the axial displacement of the piston (12), is provided between the first port (13) and the first fluid chamber (A). An orifice (15) is provided in the conduit connecting the first fluid chamber (A) and the second fluid chamber (B).

Abstract: A reliable and economical one way fluid flow check valve fabricated from two thin sheets of plastic is described. One or more half cylindrically shaped depressions are vacuum formed across one or both sheets of plastic, and a 1/2 funnel shape fluid entrance can be simultaneously vacuum formed in one or both sheets. The two sheets are than heat sealed together at their longitudinal edges to form the complete check valve. The check valve is preferably in the form of a truncated V. The check valve can be heat sealed into a variety of devices such as toy balloons, cushions, mattresses, inflatable boats, and the like. Various modifications are described for light or heavier fluid pressure applications.

Abstract: The valve (31) comprises at least two lateral openings (34, 36) which can be shut off by a plug (40) provided with an axial orifice (48) for the passage of gas and sliding axially in the casing (32) between a position in which the openings, (34, 36) are shut off under the influence of a spring (44) and an open position counter to the action of the spring (44) under the influence of the pressure of the filling gas, and a level valve (52) activated by a float (62) at the bottom of the casing (32).The plug (40) comprises an inner cavity (70), the bottom of which has a cross-section in the shape of an open "V". In this cavity (70) is a ball (72) which prevents the cylinder from being filled when the latter is inclined sufficiently for the ball not to be situated at the bottom of the cavity (70).

Abstract: A self-closing water valve has a valve seat, a valve closing member cooperates with the valve seat so as to abut against and to be lifted from the valve seat, and an auxiliary valve coupled with the valve closing member for reducing operational forces during lifting of the valve closing member from the valve seat and therefore opening the valve.

Abstract: Intake or exhaust reed valves of a compressor or vacuum pump have T-shaped flappers which are received in similarly T-shaped pockets so as to be substantially flush with the valve plate. A dirt trap groove is formed in each pocket adjacent to the hinge line of the flapper, a corner relief groove surrounds lands which support the flappers in their associated pockets above the groove, and the extending-part of each pocket widens in the direction away from the cross-part of the pocket. The mating T-shapes of a flapper in a pocket restrain the flapper in the pocket without interfering with the opening and closing motion of the flapper.

Abstract: A valve assembly for a compressor or the like having improved sealing and noise reduction characteristics. A reed valve is provided with a gasketing layer, such as expanded graphite, which confronts the orifice plate. One reed valve plate also incorporates an integral, formed limiter portion to reduce the number of parts requiring assembly.

Abstract: This invention relates to an accurate mechanical proportioning pump and/or mixing device that is adaptable for industrial, commercial and consumer use that incorporates a series of piston-seal-cylinder configuration with necessary check valves and seats that automatically proportionally pumps and/or mixes such fluids as soaps, fruit concentrates, food syrups, pesticides, herbicides, fungicides and fertilizers based on various other fluid driving mediums with a high degree of accuracy of controlled fluid to driving mediums.

Abstract: A seismic event shut-off gas valve having a primary conduit arranged for orientation in a vertical position, and a secondary conduit intersecting the primary conduit at an intersection, with a plug member slidably secured in the secondary conduit in a first position and slidable to a second position, wherein the plug member is arranged to engage a sealing ring within the primary conduit upon dislodgement of the plug member from the first position by a seismic event. A chain member secured to the cap and the plug member permits the cap member to be removed from the secondary conduit to withdraw the plug member from the second position to the first position and reposition the plug member in the secondary conduit to the first position.

Abstract: A throughflow valve (1) comprising a valve seat (2) and a valve body (3) is intended to permit a given flow of fluid to pass therethrough when the valve is closed. To this end, the mutually abutting surfaces (2a; 3a) of the valve seat and/or the valve body are irregular or roughened, these irregularities having a size of 20-100 .mu.m. The invention also relates to a mould tool provided with corresponding irregular or roughened surface created by a so-called sparking operation.