Abstract: A concealed valve body includes: a water mixing seat, including a water mixing chamber, a first inlet hole communicated with the water mixing chamber, and a second inlet hole communicated with the water mixing chamber; a first inlet pipe, having a first inlet channel that is communicated with the first inlet hole; a second inlet pipe, having a second inlet channel communicated with the second inlet hole. The first inlet hole and the second inlet hole are distributed along an axial direction of the water mixing chamber, and a height difference is present between the first inlet hole and the second inlet hole.

Abstract: A valve including a valve body; an adjusting assembly having an actuating portion and a regulating part; a flood prevention device at least partly located in the valve body, with the flood prevention device having a regulating portion; and a relief aperture defined through a wall of the regulating part to assist in reducing pressure on the regulating portion when the regulating portion moves to a closed position.

Abstract: A valve unit for a dosing device of a fluid has a unit body having a fluid inlet passage, a fluid outlet passage, and, therebetween, an obturator seat housing a ball obturator. An obturator passage is formed in the ball obturator, which is rotatable between an open position, in which the obturator passage fluidically connects the fluid inlet passage to the fluid outlet passage, and a closed position, in which the ball obturator prevents passage of fluid from the fluid inlet passage to the fluid outlet passage. A fluid-tight intake piston, slidingly housed in a piston chamber and integral in rotation with the ball obturator, fluidically communicates with the fluid inlet and outlet passages. Cam means arranged between the unit body and the fluid-tight intake piston cause translation of the fluid-tight intake piston from an advanced position to a retracted position for intaking residual fluid present in the obturator passage.

Abstract: A fluid flow metering rotary valve body is provided that includes a central axis, and at least one lobe having at least one fluid opening. At least one fluid throttle is formed on a perimeter surface of the at least one fluid opening. The fluid throttle can have at least one blind void or at least one protrusion and can facilitate various flow strategies, including a decreasing fluid flow with increasing overlap between the fluid opening and a fluid port. The at least one protrusion can extend to various depths to accommodate different fluid openings and injection molding strategies.

Abstract: The present disclosure provides a system and associated method for a positive retraction bypass valve. The positive retraction bypass valve can include a dump cartridge in a valve body with a valve stem biased to an open position to allow flow through a drain path. An adjuster can advance toward the valve stem and oppose the bias to at least partially close the valve. Upon retraction of the adjuster from the valve body, a retraction rod assembly with a retraction rod coupled to the adjuster and the valve stem can pull the valve stem toward the adjuster if the bias or fluid pressure on the valve stem does not move the valve stem toward the adjuster.

Abstract: A pressure relief valve for a fluid power assist steering system. The valve includes a housing and a spool disposed in the housing. The spool defines a cavity and has a first end and a second end. The spool is movable in the housing to limit an output pressure of the pump. A poppet seat is secured to the second end of the spool. A poppet is disposed in the cavity. A poppet spring biases the poppet into engagement with the poppet seat. A set screw is received in the first end of the spool. The set screw is rotatable relative to the spool to adjust a compression level of the poppet spring.

Abstract: The invention relates to a process for a control valve having a valve seat and a throttle element, which throttle element has a sealing edge for sealing the valve seat, and furthermore a first opening area and a second opening area, which throttle element can furthermore be positioned relative to the valve seat by a positioning motion such that the first opening area will be effective in a first opening position thereof and/or the second opening area will be effective in a second opening position thereof, characterized in that a sealing element is arranged on the throttle element and/or the valve seat such that the throttle element will pass over a sealing position as it transitions from the first opening position to the second opening position, in which sealing position the first opening area will be effective and the second opening range will not be effective.

Abstract: A burner unit includes first and second burner assemblies supplied with a gas mixture via first and second valves, respectively. A first valve control assembly controls the first and second valves between open and closed positions. Third and fourth burner assemblies of the burner unit are supplied with a gas mixture via third and fourth valves, respectively. A second valve control assembly controls the third and fourth valves between open and closed positions. The first and second valve control assemblies are separate assemblies that are configured to cooperate to simultaneously provide a gas mixture to the first, second, third and fourth burner assemblies in respective high power settings of the first and second valve control assemblies.

Abstract: A trigger retention mechanism for a device that includes a depressible trigger and a bushing releasably coupled to a housing by a releasable fastener, such as an E-clip. The retention mechanism can also include O-rings to provide an air-tight seal between the bushing and the housing. To replace the retention mechanism, a user need only release the fastener and pull the bushing outwardly from its position within the housing, rather than replacing the entire handle or trigger assembly.

Abstract: A reservoir dredging assembly includes a dredging tube and at least one dredging device adapted to be installed to at least one secondary reservoir. The at least one dredging device includes a linking tube, an extending tube, a water gate, and a control unit. The linking tube is connected to the dredging tube for water in a primary reservoir, together with sediments deposited therein, to flow through. The extending tube has a top cutlet adapted to be located lower than the maximum water level of the primary reservoir. The water gate is mounted in the linking tube at a position downstream of the extending tube. The control unit is convertible between a first state for closing the water gate and a second state for opening the water gate.

Abstract: An isolation valve includes a dead chamber, including a body with a fluid-passing conduit, a device for obturating the fluid passage in the conduit, which may be actuated between a fluid-passing position and a position for obturating the fluid passage in the conduit. In its obturation position, the obturation device forms a dead chamber. A wall of the obturation device comprises a through-hole, in which is positioned a device for decompression of the dead chamber. A hydrocarbon transport facility includes at least two pipes connected through such an isolation valve with a dead chamber.

Abstract: Regulating valve for a gas cooking appliance suitable for supplying different types of combustible gas such as, for example, natural gas or liquefied gas. A valve body of the valve has an inlet conduit, an outlet conduit and a cavity wherein a rotary regulating member is housed. The regulating member includes a plurality of inlet paths communicated with the inlet conduit which, by means of the rotation of the regulating member, allows varying gas flow in the outlet conduit. According to some implementations, the inlet path of the regulating member corresponding to a minimum gas flow is in one and the same angular and axial position for each of the different types of combustible gases.

Abstract: A valve device capable of fast switching and fine adjustment of flow includes a valve seat unit. The valve seat unit has a chamber therein. The chamber is provided with a switch unit and a fine adjustment unit. The switch unit is used to open or close the valve device. The fine adjustment unit is used to adjust the flow passing the valve device. The user may individually operate the switch unit to quickly open and close the valve device and to operate the fine adjustment unit to adjust the flow passing the valve device so as to enhance the convenience of use.

Abstract: An ignition switch assembly suitable for being connected to a rotary shaft of a gas tap of a cooking appliance. According to one implementation the ignition switch includes a coupling element through which the ignition switch assembly is coupled to the rotary shaft, the coupling element being rotational with the rotary shaft. A fixed contact element and a movable contact element are provided within a casing of the assembly along with the coupling element which includes a cam on an outside surface thereof. The movable and fixed contact elements and the coupling element are arranged so that the cam urges the moveable contact element into contact with the fixed contact element when the coupling element is rotated between a selective angular range. A resistance element is arranged to contact at least a portion of the body of the coupling element to provide resistance against the rotational movement of the coupling element.

Abstract: A poppet valve for a hydraulic coupling member has an internal, spring-loaded check valve (which may be a ball check valve) in fluid communication with a bleed passage. The check valve may be configured as a pressure-relief valve which bleeds off excess hydraulic fluid pressure within the coupling member to a preselected value. A poppet valve according to the invention may be used in female coupling members and/or male coupling members. Certain embodiments of the invention may be retrofitted to coupling members of the prior art.

Abstract: A tool turret for machining workpieces has a housing and with a part that can be rotated around an axis of rotation into several rotary positions. On the rotating part, several tool holders are mounted on the circumference for holding tools to which a cryogenic cooling medium can be fed by means of a first feed line and a respective second feed line. The first feed line can be moved in a linear manner in at least some sections by a linear actuator whereby the first feed line is connected in a first position with the second feed line belonging to the tool in work position and in a second position is disconnected from the second feed lines for changing the rotary position of the rotating part. The tool turret enables the cryogenic cooling medium to be fed to the tools in a simple and reliable manner.

Abstract: Regulation valve for a gas cooking appliance adapted for the supply of first and second different types of fuel gas, such as natural gas or liquefied gas. The regulation valve has a valve body with an inlet conduit and an outlet conduit, and a rotatable regulating organ housed in the valve body. The regulating organ has a plurality of inlet holes connected to the inlet conduit which, by means of the rotation of said regulating organ allow a gas flow to be altered, the inlet holes of the regulating organ corresponding to the first type of fuel gas are in a first axial position and the inlet holes corresponding to the second type of fuel gas are in a second axial position.

Abstract: A valve with a valve body in which is rotatably mounted a valve member, the valve member having therein a ball check for selectively preventing fluid flow through the valve. This abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure and is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims, 37 C.F.R. 1.72(b).

Abstract: In one example, a fuel system includes a fuel tank having a wall with an opening. A fuel float valve has a float and a seal plate on opposing ends of a beam. The fuel float valve also includes a fulcrum about which the beam is configured to pivot in response to a change in fuel level. The fuel float valve is movable between unsealed and sealed positions in which the seal plate is respectively unsealed and sealed relative to the opening. The seal plate includes first and second portions. The first portion seals against the wall, and the second portion is movable relative to the first portion in the sealed position from a closed position to an open position with respect to the first portion.

Abstract: The invention relates to a discharge and purging device (10) adapted for limiting the pressure of a fluid (F) occupying the inner volume of a connecting endpiece (2). The device (10) comprises a valve or a valve actuation piston; an inner enclosure (30) opening out on a front face (22) of the valve or of the piston; and an obturator (60) moveable between a closed position (C1) where it obturates the front face (22) at a first seal area (Z92) defining a first seal section (S92) towards the front face (22) and an open position where it no longer obturates the front face (22).

Abstract: An internal blow out preventer for use in a drill string, comprising a housing having an outer valve closure element and where the outer valve closure element is configured to be moved between an open and a closed position, wherein the outer valve closure element is provided with an inner valve closure element that is configured to be moved between an open and a closed position inside the outer valve closure element.

Abstract: A valve with a dual rotational valve member is provided. The valve includes a first valve member and a second valve member. An actuation arrangement is operably positioned between the first valve member and the second valve member to rotate the first valve member in a first direction and the second valve member in a second direction opposite the first direction. This counter-rotation of the first and second valve members selectively aligns or misaligns a pair of flow ports of the first valve member with a pair of flow ports of the second valve member. When the pairs of flow ports are aligned, the flow path of the valve allows for straight through flow of a fluid through the valve thereby decreasing turbulence, back pressure, and noise.

Abstract: A cleaning system for cleaning one or more valve seats in a valve and for cleaning one or more interior surfaces of said valve with a cleaning agent, where said cleaning system are preferably arranged in a mixproof valve (1) consisting of at least a valve body (2), one or more valve seats (5, 9), a first valve plug (4) with a first stem (6) and a second valve plug (8) with a second stem (10), the second valve plug having a central hollow part (11) for guiding the first stem. Said cleaning system has nozzle means (17) for creating two different spray patterns, said nozzle means being arranged between and/or on the first stem and the hollow central part of the second valve plug, where a first spray pattern is primarily used for cleaning the interior surfaces of said valve and where a second spray pattern is primarily used for cleaning one or more of said valve seats, while the valve is open between a product area (14) and a drain area (15).

Abstract: A device for the piping of process systems in the food and beverage industry in that: the respective valve distributor tree (rvdt) opens immediately into the lower tank bottom of a respectively associated tank of the process system, and/or the rvdt is connected via an associated pipe connection to an associated process aggregate or to the lower tank bottom of the process apparatus, and the pipe connection opens out into the tank-side or process-aggregate-side end of the valve distributor tree (vdt); a stirring device (16) which is operative in the entire interior space of the hollow structure is disposed in the vdt; and/or the vdt with the entire interior space of the hollow structure is part of a circulation line which extends over the tank or the process aggregate; and/or the vdt can be recuperatively acted upon by a heat transfer medium (W).

Abstract: A poppet valve for a hydraulic coupling member has an internal, spring-loaded check valve (which may be a ball check valve) in fluid communication with a bleed passage. The check valve may be configured as a pressure-relief valve which bleeds off excess hydraulic fluid pressure within the coupling member to a preselected value. A poppet valve according to the invention may be used in female coupling members and/or male coupling members. Certain embodiments of the invention may be retrofitted to coupling members of the prior art.

Abstract: Disclosed is an exemplary valve having a first valve member that may include at least one orifice, and which is moveable between a first position and a second position, and a second valve member that includes at least one orifice, and which is moveable relative to the first valve member between a first position, in which the at least one orifice of the second valve member is fluidly disconnected from the at least one orifice of the first valve member, and a second position, in which the at least one orifice of the second valve member is fluidly connected to the at least one orifice of the first valve member. The exemplary valve may also include first and second actuators for moving the first and second valve members between their respective first and second positions.

Abstract: A non-magnetic latching servo actuated valve under the control of a controller comprising a motor in rotational communication with a lead screw. The lead screw advances or retracts a valve stem connected to a valve stem cap. The valve stem cap has a valve stem cap passage. A valve end cap having a valve seat is provided and receives the valve stem cap such that the valve stem cap can contact the valve seat. A pressure relief device or shuttle assembly is positioned internal to the valve stem cap. The shuttle assembly is used for venting build-up downstream pressure through the non-magnetic latching servo actuated valve outlet, through the valve stem cap passage, around the shuttle assembly, through passages, into a pressure chamber, and to the nonmagnetic latching servo actuated valve exit where the fluid vents until the system is in balance.

Abstract: A piping system for food and beverage process plants connecting a tank and process assembly to a pipe system via double seat valves mix-proof in the seat including valve distributor trees and the double seat has two serially disposed closing members with open and closed positions, the closing members delimiting a leakage cavity with a connection path to the surroundings of the double seat valve. A first closing member comes in sealing contact at a second closing member and transfers the second closing member into a sealed position. The second closing member having a hollow rod and a seat seal.

Abstract: An apparatus for controlling the flow of fluid may include a main passageway for conducting the fluid and the valve which may include a rotatable valve cavity having a ball check. The rotatable valve cavity may be rotatable with respect to the main passageway to provide at least three positions including a bypass position, a closed position and a run position. The valve may include an outlet for connection to the sight glass, and the apparatus may include a bleeder valve. The apparatus may include a sight glass which may be in fluid communication with the valve.

Abstract: A valve assembly has a valve body having an upper portion defining an upper chamber having an upper valve seat, and a lower portion defining a lower chamber having a lower valve seat, with an intermediate seat region between the upper valve seat and the lower valve seat. An upper valve stem is movable between a closed position seated against the upper valve seat and an open position spaced apart from the upper valve seat, and a lower valve stem is movable between a closed position seated against the lower valve seat and an open position spaced apart from the lower valve seat. A blocking ring is disposed in between the upper valve stem and the lower valve stem, and in contact with the intermediate valve seat. When the upper valve stem is open and the lower valve stem is closed, fluid escaping the upper chamber impinges on the blocking ring. When the upper valve stem is closed and the lower valve stem is open, fluid escaping the lower chamber impinges on the blocking ring.

Abstract: A combination valve assembly comprises an inner valve nested within an outer valve. The outer valve comprises a housing and a closure, permitting full closure of the valve assembly. The inner valve comprises a housing and a closure, permitting flow control by the inner valve within requiring movement of the outer valve. The housing of the inner valve is keyed to the outer valve closure, so that movement of the outer valve closure rotates the inner valve housing and closure simultaneously.

Abstract: The invention relates to a flow adjustment valve (1) comprising a valve housing (2) having a flow channel (3) in which a throttle unit (4, 11) having an adjustable throttle element (11) and a shut-off unit having a shut-off element (4) which blocks the flow channel (3) in a closed position are arranged, the shut-off element (4) being actuatable from the outside by means of a handle (16). The aim of the invention is to simplify the handling of a flow adjustment valve of the aforementioned type. For this purpose, the throttle element (11) can also be actuated by means of the handle (16).

Abstract: The present invention relates to a two-stage valve for controlling fluids, in particular a hydraulic fluid. The valve includes an actuating element, a pilot stage having a first valve seat and a first closing body, which is connected to the actuating element, and a main stage having a second valve seat and a second closing body. The second closing body is provided with a fastening region and a main region having a passage opening. The first valve seat is arranged at the passage opening. The second closing body is connected to the actuating element via the fastening region. The fastening region is designed elastically in such a way as to open the pilot stage by elastically deforming during actuation of the actuating element.

Abstract: A pipe branching arrangement, in particular for a tank farm system, comprises an at least approximately vertically extending hollow body which has at least one lateral connector, further comprising at least one mixproof valve which sits on the connector and produces a closable connection between the hollow body and at least one pipeline. The valve has two closing members, between which there is a leakage space which has a leakage outlet opening, the leakage space having a circumferential wall which extends from an inlet on the connector side to the leakage outlet opening on the outlet side, which is at a distance from the inlet. The circumferential wall has a decline on the gravitational force side of the leakage space in direction to the leakage outlet opening.

Abstract: A valve apparatus has a valve (1), an actuator (2) and a leakage sensor (3). A body (4) of the valve has first and second valve chambers (6, 8) connected to respective valve ports (10 & 12, 14 & 16) and joined by an intermediate passage (18). The valve can be set by the actuator to any one of three valve configurations. In an ‘open’ configuration the intermediate passage is open to interconnect the first and second chambers. In a ‘closed’ configuration, the intermediate passage is closed by first and second seals (24, 26) seated at respective locations in the passage to seal respectively between the first and second chambers and a leakage chamber (28) at the portion of the intermediate passage between the two seals. In a ‘cleaning’ configuration one of the seals is unseated to connect a respective one of the first and second chambers to the leakage chamber, while the other seal remains seated.

Abstract: A non-magnetic latching servo actuated valve under the control of a controller comprising a motor in rotational communication with a lead screw. The lead screw advances or retracts a valve stem connected to a valve stem cap. The valve stem cap has a valve stem cap passage. A valve end cap having a valve seat is provided and receives the valve stem cap such that the valve stem cap can contact the valve seat. A pressure relief device or shuttle assembly is positioned internal to the valve stem cap. The shuttle assembly is used for venting build-up downstream pressure through the non-magnetic latching servo actuated valve outlet, through the valve stem cap passage, around the shuttle assembly, through passages, into a pressure chamber, and to the non-magnetic latching servo actuated valve exit where the fluid vents until the system is in balance.

Abstract: An auxiliary pump assembly for a hydrostatic transmission that operates at a reduced pressure when the auxiliary circuit is not in use, and operates at an increased pressure when the auxiliary circuit is in use, thereby reducing the heat generated by the auxiliary pump. The auxiliary pump assembly can be used to supply low pressure makeup flow to a closed loop of a hydrostatic transmission. A combination valve including a bypass valve and a relief valve is also provided.

Abstract: A selector valve of a pressure filter for aquariums or ponds comprises a valve body having a main liquid inlet opening (16), a secondary inlet opening (17), an outlet opening (18) and a discharge opening (19), a cursor (20) housed in the valve body (12), having a passage for the liquid (21) and being selectively moveable between a first position, corresponding to the filtration mode of the filter (11), wherein the main liquid inlet opening (16) is placed in fluid communication with the outlet opening (18), and a second position, corresponding to the washing mode, wherein the secondary inlet opening (17) is in fluid communication with the discharge opening (19), and a safety valve (36) included in the cursor (20) to protect the pressure filter in case of superpressure of the liquid.

Abstract: An aseptic valve device for the separation of hostile media including a housing which has connection pieces, each of specific opening cross section, for at least two pipelines which can communicate with one another in the housing via a connecting orifice of specific opening cross section, and a valve arrangement for the selective closing and release of the connecting orifice, the valve arrangement having at least one valve seat and at least one valve disk, the valve disk having a sealing face cooperating with the valve seat and a middle connecting portion which is connected to a valve stem, and the valve disk having a tubular extension which serves for the outflow of a medium, and a drainage portion extending obliquely or orthogonally with respect to the plane spanned by the sealing face of the valve disk and has a plurality of drainage orifices.

Abstract: A valve is provided that includes a valve housing, a valve element, and a flapper. The valve housing has a passage. The valve element is rotationally mounted in the passage and moveable between an open position and a closed position. Additionally, the valve element has a flow channel extending therethrough. The flapper is coupled to the valve element and moveable between a closed position, to thereby substantially seal the flow channel, and an open position, to thereby unseal the flow channel, the flapper configured to move to the open position when a differential pressure across the flapper reaches a predetermined value.

Abstract: A plug which is insertable into a outlet from a vessel, to seal the vessel so that it may hold liquid. To prevent overflow, the plug has an in-built valve which automatically opens when it experiences a predetermined threshold pressure. The threshold pressure can be adjusted to cater for vessels of differing size.

Abstract: A method of forming a ball valve element for a rotary ball valve assembly, the method comprising the steps of: (a) inserting an impedance element through an insertion opening of a ball valve element into a bore; (b) forming a fluid opening in the ball valve element which is non-rectilinearly aligned with the insertion opening and which communicates with the bore; and (c) sealing the insertion opening. A ball valve element for a rotary ball valve assembly formed using such a method; and a rotary ball valve assembly comprising a ball valve element formed using such a method are also provided.

Abstract: A rotary valve assembly has a valve body, a rotor and a plurality of guidance check valves. The valve body includes a valve seat longitudinally defining a bore through a center thereof. A plurality of valve oil passages and a main oil passage are respectively distributed radially around the bore. The rotor is movably received in the bore of the valve body. A plurality of guidance check valves is mounted in the valve oil passages. The rotor rotates to switch to a predetermined valve position by manual operation or electric power, where a predetermined oil supply path is precisely formed to supply oil to a predetermined valve communicating with a valve oil passage.

Abstract: The invention relates to a device for actuating double seat valves, which are especially suitable for the food and beverage industry and which have an independently actuated first closing element (3) and a second closing element (4) actuated dependently on it, whereby the actuation (100, 200) always shows via a main adjustment device (100) for the full open position (H) as well as, for the case of maximum requirements, the respective individual adjustment devices (200; 200.1, 200.2) which are assigned to the closing elements (3, 4) for generation of the partially open positions (T1, T2) for the seat cleaning of the closing elements (3, 4). The object of the invention is to design a device according to this generic type, that is constructed as simply as possible and that the first partially open position (T1) of the independently actuated closing element (3) is adjustable from the outside of the device.

Abstract: The invention relates to a device for actuating double seat valves, which are especially suitable for the food and beverage industry and which have an independently actuated first closing element (3), which is designed as a sliding piston and a fully dependent on this actuated second closing element (4), which is designed as a seat disc, whereby the actuator (100, 200) produces at all times using a main adjustment device (100) for the fully open position (H) as well as, for the case of maximum requirements, the respective individual adjustment devices (200; 200.1, 200.2) which are assigned to the closing elements (3, 4) for generation of the partially open positions (T1, T2) acting in opposite directions for the seat cleaning of the closing elements (3, 4).

Abstract: A valve operable with an associated fluid delivery system having fluid flow therethrough includes a housing, a valve body and a resetable excess flow valve. The housing has a first passage and the valve body is disposed along the first passage and including a wall at least partially defining a second passage. The excess flow valve is supported along one of the first and second passages. The valve body is displaceable between a first position permitting flow through the second passage and a second position substantially shutting-off fluid flow and resetting the excess flow valve.

Abstract: A reducer valve for pressurized gas includes a piston (2) displaceably mounted in a valve housing (3) against the force of a pressure spring (8). At one end, the piston (2) is subjected to pressure by the back pressure via a control pressure line (20) whereby the gas, which flows in from a pressurized gas source via a gas inlet (17), is throttled. The reducer valve is improved so that a specific gas volume remains in the connected pressurized gas source below a minimum pressure. A directional valve (24, 25) is provided in the control pressure line (20) and opens above a predetermined limit pressure.

Abstract: A surge prevention valve may be used to prevent the formation of an initial surge of high pressure. The valve may be located, for example, between a high pressure gas cylinder and a medical pressure regulator. The valve is provided with first and second valves located within a housing and integrating a pressurization orifice. The initial opening of the valve in an axial direction enables gas to flow through the pressurization orifice at a first flow rate. The full opening of the valve in the axial direction enables the gas to flow through the second valve at a second flow rate, which is much higher than the first flow rate. The controlled pressurization of the gas through the orifice delays the time during which the gas reaches full recompression.

Abstract: Compressed gas canister (1?) intended to supply gas to a fastening appliance (2) that runs on compressed gas, includes a protective edge (12) forming a bowl inside which an ejection valve (16) having a bearing and displacement surface (26) is mounted so that it can move in translation between a position of rest and a gas-ejection position. The ejection valve (16) is mounted, inside a seal (3?), set back from the edge (15) of the bowl. The bearing surface (26) of the valve (16) does not protrude beyond the edge (15) of the bowl in the position of rest and is set back from the surface (30) facing towards the outside of the seal (3?, 23) in the gas-ejection position.

Abstract: A valve which has a valve body having a through-bore to permit the flow of gas through the through-bore, an excessive flow valve disposed within the through-bore of the valve body, the excessive flow valve including a supporting tube having a plurality of struts, an axial bore extending through the supporting tube, a stem movable axially against a spring within the bore and a disk on a free end of the stem. The excessive flow valve is engaged in a through-bore of the valve body.