Abstract: An electromagnetic pressure-regulating valve includes a housing comprising a first, a second and a third port, a valve seat, a valve closure member, an electromagnetic drive, and a biasing device. The electromagnetic drive comprises a coil wound on a coil carrier, an armature, a core, and an electromagnetic return-path device. The armature moves between a first and second end position and acts on the valve closure member. The biasing device is configured so that, when a current does not flow, the armature, and thereby the valve closure member, is positioned in a fail-safe setting on the valve seat so that a connection from the third port to each of the first and second ports is closed. The valve seat is connected via a fluid channel to the first and second ports. The armature is steplessly adjustable between the first and second end positions in every setting.

Abstract: A gate valve includes: a valve box; a support body disposed inside a hollow portion; a valve plate including a fixed valving section, a movable valving section sliding in a direction in which a flow passage is extended, a first peripheral region; and a second peripheral region; a first biasing section disposed at the first peripheral region, allowing the movable valving section to move toward a first opening portion, allowing the movable valving section to come into contact with an inner surface, pressing the movable valving section onto the inner surface, and closing the flow passage; and a second biasing section disposed at the second peripheral region, allowing the movable valving section to move toward a second opening portion, and releasing the flow passage by separating the movable valving section from the inner surface.

Abstract: A sealing system for a solenoid valve is provided for accommodation in a recess in an actuating element movable by a coil. The recess proceeds from an end face of the actuating element close to a valve seat. The actuating element is movably mounted in a solenoid valve and designed to clear or close the valve seat (30). A sealing disk and a spring element biasing the sealing disk are provided, wherein the spring element is arranged on the end face facing away from the valve seat centered with respect to the sealing disk and exerts a force on the sealing disk in direction of the valve seat. The sealing disk is axially shiftably guided in the actuating element. A solenoid valve itself includes such sealing system.

Abstract: An air-operated valve which can keep the impact at the time a valve part sits on a seat from causing material from shedding and thereby generating particles which contaminate a controlled fluid and thereby can maintain a high cleanliness of the controlled fluid, that is, an air-operated valve which is provided with a valve chamber body which has a valve chamber which forms a seat, a valve mechanism which is provided with a valve part which seals the seat and with a diaphragm in the valve chamber, and a housing body which houses a drive mechanism which uses working air to make the valve mechanism advance and retract to drive and control it to open and close the seat, the drive mechanism provided with a first piston, a first spring which biases the first piston, a second piston which is slidably housed in the housing body and slidably houses the first piston inside it and which pushes the first piston, and a second spring which biases the second piston, the spring force of the second spring being made larger th

Abstract: A female quick-connect coupling element for releasably joining pipes for pressurized fluid having a fluid flow duct and a valve for controlling the flow of fluid through the duct, wherein the valve has a first piston and a second piston that are mounted to move along a common axis (Y-Y?) relative to a body of the female element and wherein the first piston cooperates with a valve seat within the body of the female element, so as to close the valve, while the first and second pistons are interconnected via a mechanical link assembly and each of the pistons defines one of two opposite surfaces in contact with the fluid when the valve is open and wherein the mechanical link assembly is disposed outside the fluid flow duct.

Abstract: A multi-position valve assembly includes a valve body member at least partially defining a body chamber and a body orifice providing an inlet for ingress of a product into the body chamber. A stem member includes a plug portion at least partially located in the body chamber and a stem portion extending vertically from the plug portion beyond a top of the body chamber. The stem member includes a stem outlet capable of communication with the body chamber via a stem orifice. A first biasing member biases the stem member toward a closed position. A second biasing member biases the stem member toward the closed position only after the stem member is moved a clearance gap to a first open position.

Abstract: The invention relates to a pressure limiting valve with a hydraulic seal ring (12), characterized in that the sealing element (6), for securing the flow gap (10) between the consumer connection (3) and the pressurized fluid outlet (4), is embodied as a seal ring (12) with a limited flexibility. Said seal ring (12) is inserted without preload into a groove (13) provided therefore, whereby said groove (13) is embodied so as to allow the flow of pressurized fluid (11) behind the seal ring (12).

Abstract: A seal assembly for use with valves having a two-piece cage is described. An example seal assembly includes a body defining a bore extending along an axis to slidably receive a closure member. The body includes a first portion removably coupled to a second portion. The first portion includes a first groove and the second portion includes a second groove. The first and second grooves form a sealing surface when the first portion couples to the second portion. The example seal assembly further includes at least one sealing member disposed adjacent the sealing surface to provide a seal against the closure member and a biasing element to bias the sealing member toward the sealing surface.

Abstract: A rotary fluid pressure device (11) has a stationary valve member (17), a rotatable valve member (51), and a valve seating mechanism (73). The valve seating mechanism (73) defines an outer balance ring member (75) having a valve-confronting surface (79) in engagement with an opposite surface (81) of the rotatable valve member (51) and an inner balance ring member (77) having a valve-confronting surface (111) in engagement with the opposite surface (81) of the rotatable valve member (51), with the outer balance ring member (75) and the inner balance ring member (77) being structurally independent from the other. The outer balance ring member (75) and the inner balance ring member (77) define a balance ring passage (71) which provides continuous fluid communication between a fluid inlet (53) or a fluid outlet (53) and the valve passages (61) in the rotatable valve member (51).

Abstract: A retractable plug assembly for engaging a seat ring seating surface comprises a plug housing, a plug body, a retainer ring, a wear ring, a spring retainer and a valve spring. The plug housing has the plug body slidably disposed therewithin and defines a plug body seating surface. The wear ring is mounted to the retainer ring and extends downwardly therefrom to define a wear ring bottom face positioned downwardly relative to the plug body seating surface. The valve spring, captured between the spring retainer and the plug housing, biases the plug body away from the seat ring during engagement of the wear ring to the seat ring such that inwardly flowing fluid is prevented from directly impinging the plug body seating surface. The valve spring deforms during downward movement of the plug body such that the plug body seating surface engages the seat ring seating creating a fluid-tight seal.

Abstract: The invention comprises a needle valve-related arrangement (1) with a rotating spindle (11) in an enclosure, whereby a rotary movement of the spindle in one direction induces movement in a firs valve part (12) on the spindle in a first direction towards a second valve part (13) and vice-versa. Pressure to create sealing interaction of the valve parts (12, 13) is achieved with the aid of a spring arrangement (35).

Abstract: A valve for regulating fluids includes a piezo-electric actor unit (9) for operating a valve member assembly. The valve member assembly has at least one first piston (13) guided in a valve body (10) and a second piston (14). A hydraulic chamber, acting as a hydraulic converter, is disposed between the first and second pistons (13, 14). The second piston operates a valve-closing member (15) disposed on an end facing away from the hydraulic chamber (16). The valve closing member (15) cooperates with at least one valve seat (17) formed on the valve body (10) and in a closed position, separates a system pressure region (18) of the valve (1) from a high pressure region (5). The second piston (14) is surrounded by and supported by an approximately casing-type spacer (22) on the valve body (10).

Abstract: An adaptor is for a rising disc valve which has a handle for rotating a stem in a housing bore having a shoulder and which displaces a disc valve member which seals against a frusto-conical housing seat spaced from the shoulder. A stack of Belleville -steel springs is between the disc member and the ring seal. An interface ring is between the springs and the ring seal. As the disc member is seated in its valve seat, a ring at the attachment member abuts the shoulder. The attachment member can no longer axially displace and compressively loads the springs as the disc member is further axially displaced to the valve closed state. The compressive load on the ring seal expands the seal radially outwardly against the housing bore and radially inwardly against the piston shank.

Abstract: A swimming pool installation including a skimmer device, a vacuum system, a pump and a valve module is disclosed. A seat divides the valve module into an upstream chamber coupled to the skimmer device and a downstream chamber coupled to the vacuum system and the pump. A piston having a seal is mounted in the upstream chamber for reciprocal movement in opposition to the seat and is biased away from the seat. A pawl is mounted to the piston for rotation and stops are mounted adjacent the pawl. The piston moves reciprocally in response to a cyclical application and removal of water movement there across caused by a cyclical operation of the pump, which causes the pawl to interact with the stops and cycle between a locked condition securing the seal away from the seat and an unlocked condition permitting the seal to move against the seat.

Abstract: In a sealing element for use in particular in high vacuum technology, a moveable closure unit (4) is closed tightly against a fixed outer flange (1) whose sealing surface (2) is preferably conical. The closure unit (4) comprises a hat-shaped outer part (5) with a flat base (8) and a sealing surface (7) around the periphery; and an inner part (6) concentric with, and smaller in diameter than the outer part. Between them are one or more spring elements (10), arranged as segments on a ring, which act as a disk spring; these are supported by the outer and inner edges on the outer (5) and inner (6) parts. The spring elements (10) are mounted at an oblique angle radially towards the base (8) of the outer part (5) in such a way that when the base (8) of the outer part is subjected to pressure, the radial force is produced at the sealing surface (7) of the elastically deformable outer part (5) and its base (8) is pressed inwards.

Abstract: A motor controlled poppet valve is provided of the type including a valve body, a valve seat mounted at one end of the valve body, and a valve element that comprises a threaded shaft having one end engaged to a nut driven by a stepper motor, and a free end reciprocably moveable into a valve opening or a valve closing position, wherein the free end of the shaft assumes a substantially nonvarying distance from the drive nut or the stepper motor when moved into the valve closing position, and a resilient linkage assembly including a constant force spring that interconnects the free end of the shaft with the valve element. The resilient linkage forcibly depresses the valve element into the valve seat when the shaft is moved into the valve closing position with a force that remains substantially constant regardless of variations in the distance between the free end of the shaft and the valve closing position due to thermal expansion and contraction of the valve body.

Abstract: A piston-sleeve assembly for a flow control for a beverage dispenser in which the piston and sleeve are preferably injection molded. A rolling diaphragm provides a seal between the piston and sleeve. The piston includes flow control pads biased into contact with the sleeve.

Abstract: A membrane valve having a metal membrane bent smoothly axially at its inner and outer peripheries and welded steplessly, smoothly and flush to an outer ring clamped between two housing parts and a valve member which can be a cone in metal-to-metal engagement with a valve seat, thereby maintaining aseptic conditions without locations in which bacteria can nest.

Abstract: A hard seated globe valve assembly for use in servicing high and low temperature fluids. The valve includes a moveable stem attached at one end to a tapered plug of hard material. An equally hard seat having a tapered surface is mounted for mating engagement with the plug when the valve is closed. The seat is located in a partition that separates the globe-shaped body into two chambers having fluid inlet-outlet orifices. An annular ring is mounted between the bearing end of the stem and the plug so that the plug is resiliently engaged in the seat when the valve is closed. It has been found that hard seated valves tend to be difficult to open or lose their sealing abilities when servicing extreme temperature fluids due to the expansion and contraction when the valve is heated and cooled. The resilience of the annular ring prevents this problem by permitting the plug to adjust during expansion and contraction, thus making it easier to open the valve after cooling and precluding loss of sealing during heating.

Abstract: A nozzle with at least one opening that can be closed off, and especially a nozzle for packaging machines, including those that handle liquid products, with a valve body in the form of a piston that moves back and forth between a retracted position wherein it leaves the opening free and an advanced position wherein it completely closes off the opening. The object is to provide a nozzle with highly effective product-trimming action and continued piston operation even during the sterilization process. A guide for the piston has at least two positioning surfaces that operate in conjunction with two essentially opposite surfaces on the piston and precisely position it in the nozzle opening. The piston is axially divided or slit. Tensioning components force the halves of the piston apart and tight against the walls of the nozzle opening.

Abstract: For precision dispensing of fluids particularly for medical applications, a face valve has a valve member mounted for linear sliding movement across the face of a valve body, which has fluid passages therethrough, between positions in which respectively the valve member seals the ends of the fluid passages at the valve body face and a channel in the valve member connects the ends of the fluid passages. The valve body is of a hard corrosion resistant metal and the valve member is of bearing plastic material, both materials being inert to the fluids being dispensed. The valve is pressed against the face of the valve body by a spring which is oriented in a particular way to optimize valve life.

Abstract: A hot and cold water pressure regulating mixing faucet with automatic hot water shut-off in the event of cold water failure. The faucet maintains a predetermined discharge pressure less than the supply pressure regardless of the amount of water issuing from the faucet in combination with parts in a flat face slide valve surface to regulate the amount of water issuing from the faucet or the proportionate mixture of different or hot and cold water, and in combination with a concentric rotary proportioning selector valve having an axial bore containing the pressure regulator valve operable axially within the bore of the rotary selector valve. The pressure regulator valve is operable to completely shut off the hot water in the event of cold water failure. The slide valve and the rotary proportioning valve and the pressure regulating valve are coaxially concentric to each other cooperating in performing their valvular function upon the water entering the housing and discharging axially.

Abstract: A valve of the Y pattern is disclosed which is useful for stopping gas flow in a vacuum system. The valve has particularly good sealing characteristics needing moderate pressures to seal in a uranium hexafluoride environment. Heretofore an environment of uranium hexafluoride required high sealing pressures to be developed at the valve seat.

Abstract: A reversing valve construction having a housing provided with a chamber carrying a movable piston-like valve member therein that controls ports of a valve seat of the housing through the relative position of a cavity of the valve member relative to the ports. The ports comprise first, second and third ports disposed in spaced apart and straight line relation and the cavity bridges the first and second ports while exposing the chamber to the third port when the valve member is in one position thereof and bridges the second and third ports while exposing the chamber to the first port when the valve member is in another position thereof. A flexible sealing annular member is disposed between the valve member and the valve seat and surrounding the cavity to seal the cavity of the valve member to the valve seat while permitting sliding movement therebetween.

Abstract: A reversing valve construction having a housing carrying a movable piston-like valve member therein that controls ports of a valve seat of the housing provided with a chamber through the relative position of a cavity of the valve member relative to the ports. The ports comprise first, second and third ports disposed in spaced apart and straight line relation and the cavity bridges the first and second ports while exposing the chamber to the third port when the valve member is in one position thereof and bridges the second and third ports while exposing the chamber to the first port when the valve member is in another position thereof. A flexible sealing annular member is disposed between the valve member and the valve seat and surrounding the cavity to seal the cavity of the valve member to the valve seat while permitting sliding movement therebetween.

Abstract: A reversing valve construction having a housing provided with a chamber carrying a movable piston-like valve member therein that controls ports of a valve seat of the housing through the relative position of a cavity of the valve member relative to the ports. The ports comprise first, second and third ports disposed in spaced apart and straight line relation and the cavity bridges the first and second ports while exposing the chamber to the third port when the valve member is in one position thereof and bridges the second and third ports while exposing the chamber to the first port when the valve member is in another position thereof. A flexible annular sealing member is disposed between the valve member and the valve seat and surrounding the cavity of the valve member to seal the cavity of the valve member to the valve seat while permitting sliding movement therebetween.