DE2824873A1 - Gas-tight ceramic ball valve - usable to 600 bar, with edge of seating broken so that surfaces form an obtuse angle - Google Patents

Gas-tight ceramic ball valve - usable to 600 bar, with edge of seating broken so that surfaces form an obtuse angle

Info

Publication number
DE2824873A1
DE2824873A1 DE19782824873 DE2824873A DE2824873A1 DE 2824873 A1 DE2824873 A1 DE 2824873A1 DE 19782824873 DE19782824873 DE 19782824873 DE 2824873 A DE2824873 A DE 2824873A DE 2824873 A1 DE2824873 A1 DE 2824873A1
Authority
DE
Germany
Prior art keywords
valve
ball
edge
gas
valve according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
DE19782824873
Other languages
German (de)
Other versions
DE2824873C2 (en
Inventor
Karl Stark
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SAPHIRWERK AG NIDAU
Original Assignee
SAPHIRWERK AG NIDAU
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SAPHIRWERK AG NIDAU filed Critical SAPHIRWERK AG NIDAU
Priority to DE19782824873 priority Critical patent/DE2824873A1/en
Publication of DE2824873A1 publication Critical patent/DE2824873A1/en
Application granted granted Critical
Publication of DE2824873C2 publication Critical patent/DE2824873C2/de
Granted legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/04—Check valves with guided rigid valve members shaped as balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/14—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with ball-shaped valve member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/04—Check valves with guided rigid valve members shaped as balls
    • F16K15/048—Ball features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K25/00—Details relating to contact between valve members and seats

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)
  • Taps Or Cocks (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

Gas-tight ball valve consists of a ball and seating made from a hard material such as Si3N4, sintered Al2O3, sapphire or ruby. The edge of the scating is broken so that the two surfaces form an obtuse angle and the ball seats on one of the surfaces. The seat and broken surface are lapped the seating surface is polished. The included angle (average) of the seat is 90-120 degrees. The valve is gas tight and withstands pressures of up to 600 bar. The ball and seating are made from the same material.

Description

PATENTANWALT DIPL.-PHYS. HEINRICH SEIDSPATENT ADVOCATE DIPL.-PHYS. HEINRICH SEIDS

62 Wiesbaden · Bierstadter Höhe 15 · Postfach 12068 · Telefon (0 6121)56 53 82 Postscheck Frankfurt/Main 181008-602 · Bank Deutsche Bank 395 63 72 · Nass. Sparkasse 108 00 30 6562 Wiesbaden · Bierstadter Höhe 15 · P.O. Box 12068 · Telephone (0 6121) 56 53 82 Postscheck Frankfurt / Main 181008-602 · Bank Deutsche Bank 395 63 72 · Nass. Sparkasse 108 00 30 65

Wiesbaden, dein 05. Juni 19 78 S 313 h/rdWiesbaden, June 5th, 1978 S 313 h / rd

Saphirwerk AG NidauSaphirwerk AG Nidau

Dr. Schneiderstrasse 110Dr. Schneiderstrasse 110

CH-2560 NidauCH-2560 Nidau

Gasdichtes Kugelventil und Verfahren zu dessen Herstellung .Gas-tight ball valve and process for its manufacture.

Die Herstellung gasdichter Ventile, insbesondere Kugelventile, bietet erhebliche Schwierigkeiten, weil es schwer fällt, für die Ventilkugel und den Ventilsitz Materialien zu finden, die eine genügende Dichtwirkung ergeben und die zugleich an sich genügend gasdicht sind, um jede Diffusion auszuschliessen. Die vorliegende Erfindung beruht nun auf der überraschenden Feststellung, dass es bei geeigneter Formgebung des Ventilsitzes möglich ist, mit sehr harten Materialien, beispielsweise Sinterkeramik, Saphir, RubinThe manufacture of gas-tight valves, especially ball valves, presents considerable difficulties because it is difficult falls to find materials for the valve ball and the valve seat, which give a sufficient sealing effect and which are at the same time sufficiently gas-tight to rule out any diffusion. The present invention is now based on the surprising finding that it is possible with a suitable shape of the valve seat, with very hard Materials such as sintered ceramics, sapphire, ruby

909851/0057909851/0057

Dipl.-Phy«. Heinrich Seids · Patentanwalt · Bierstadter Höhe 15 ■ Postfach mos ■ 6200 Wiesbaden 1 · <? (o 6121) 56 53 Dipl.-Phy «. Heinrich Seids · Patent Attorney · Bierstadter Höhe 15 ■ Postfach mos ■ 6200 Wiesbaden 1 · <? (o 6121) 56 53

und dergleichen, eine hohe Gandichtheit der Ventile zu erreichen. Es ist dabei besonders auch das Problem zu lösen, eine Beschädigung des aus dem harten, spröden Material bestehenden Ventilsitzes durch die Ventilkugel zu vermeiden.and the like, a high level of tightness of the valves reach. The problem to be solved is that of damaging the hard, brittle material to avoid existing valve seat by the valve ball.

J Das erfindungsgeinäsfie Kugelventil ist dadurch gekennzeichnet, dass die Ventilkugel und der Ventilsitz aus einem harten Material bestehen, und dass der Ventilsitz eine gebrochene Kante zwischen zwei mit stumpfem Winkel aneinanderstossenden Flächen aufweist, wobei die Ventilkugel auf dieJ The ball valve according to the invention is characterized by that the valve ball and the valve seat are made of a hard material, and that the valve seat is a broken one Has edge between two surfaces abutting at an obtuse angle, the valve ball on the

j eine Fläche aufliegt.j a surface rests on it.

Die Erfindung wird im folgenden anhand der Zeichnung, die ein Ausführungsbeispiel des gasdichten Kugelventils darstellt, näher erläutert.The invention is explained below with reference to the drawing, which shows an embodiment of the gas-tight ball valve, explained in more detail.

Fig. 1 zeigt den Ventilsitz im Schnitt mit aufgelegter ic Ventilkugel undFig. 1 shows the valve seat in section with the valve ball and ic

Fig. 2 zeigt einen Teilschnitt durch den Ventilsitz in stark vergrößertem Massstab.Fig. 2 shows a partial section through the valve seat on a greatly enlarged scale.

Der Ventilsitz 1 und die Ventilkugel 2 bestehen aus einem harten gasdichten Material, beispielsweise Si3 1^ ~ oder Λ1->°ο ~ Sinterkeramik, Saphir oder Rubin. Wie Fig. 2 zeigt, sind am oberen Ende des Ventilsitzes 1 Flächen ganz be-The valve seat 1 and the valve ball 2 consist of a hard gas-tight material, for example Si 3 1 ^ ~ or Λ 1-> ° ο ~ sintered ceramic, sapphire or ruby. As Fig. 2 shows, at the upper end of the valve seat 1 surfaces are very important

909851/0057909851/0057

Dipl.-Phys. Heinrich Seids · Patentanwalt · Bierstadter Höhe is · Postfach 5105 · 6200 Wiesbaden χ · ζ? (ο 6ι 2ΐ) $6 53 Dipl.-Phys. Heinrich Seids · Patent Attorney · Bierstadter Höhe is · PO Box 5105 · 6200 Wiesbaden χ · ζ? (ο 6ι 2ΐ) $ 6 53

stimmter Form vorgesehen, nämlich zwei kugelige Flächen oder Fasen 3 und 4, deren Radian R3 bzw. R4 betragen. Die' Fasen 3 und 4 stossen mit stumpfem Winkel aneinander und bilden dort eine stumpfe Kante 5. Die Kugel 2 liegt auf " der dichtenden Fase 4 auf, während zwischen ihr und der Fase 3 ein gewisses Spiel besteht. Eine der mittleren Neigung der Fase 3 angepasste Kegelfläche weist vorzugsweise einen Oeffnungswinkel von 90 bis 120 auf. Mit andern Worten beträgt die mittlere Neigung der Fiise 3 zur Achse des Ventils vorzugsweise 45 bis 60 . Bei einem Durchmesser D der Ventilbohrung von 1,2 nun beträgt beim Ausführungsbeispiel der Radius R3 1,25 mm, der Radius R4 0,75 mm, derjenige der Kugel 2 ebenfalls 0,75 mm, die radiale Breite in der Projektion gemessen der beiden Fasen 0,08 nun, die radiale Breite der Fase 4 in der Projektion gemessen 0,03 mm, die axiale Distanz A 0,055 mm und die axiale Distanz B 0,027 mm.A certain shape is provided, namely two spherical surfaces or chamfers 3 and 4, the radians of which are R3 and R4, respectively. The' Chamfers 3 and 4 meet at an obtuse angle and form an obtuse edge 5 there. The ball 2 rests on it "of the sealing bevel 4, while there is a certain amount of play between it and the bevel 3. One of the medium inclinations The conical surface adapted to the bevel 3 preferably has an opening angle of 90 to 120. In other words is the mean inclination of the Fiise 3 to the axis of the Valve preferably 45 to 60. With a diameter D of the valve bore of 1.2 in the exemplary embodiment the radius R3 1.25 mm, the radius R4 0.75 mm, that of the sphere 2 also 0.75 mm, the radial width in the projection measured the two bevels 0.08 now, the radial width of the bevel 4 in the projection measured 0.03 mm, the axial Distance A 0.055 mm and the axial distance B 0.027 mm.

Form und Abmessungen der Fasen des Ventilsitzes sind unter den folgenden massgebenden Gesichtspunkten gewählt:The shape and dimensions of the bevels of the valve seat are selected based on the following criteria:

Die Ventilkugol soll auf dom Sitz nicht haften bleiben. Ein Ausbrechen uns harten, spröden Materials des Ventilsitzes und/ oder der Ventilkugel beim schlagartigen Anlege« der Ventilkugel gegen den Sitz soll vermieden v/erden. Das wird erreicht durch die HiIfsfase 3 und das Brechen der Kante 5. Auch wenn die Kugel etwas exzentrisch auftrifft, wird sie in die MitteThe valve ball should not stick to the seat. Swerving to avoid us v / ground hard, brittle material of the valve seat and / or the valve ball at the abrupt landing "of the valve ball against the seat. This is achieved by the auxiliary bevel 3 and the breaking of the edge 5. Even if the ball hits a little eccentrically, it will be in the middle

909851/0057909851/0057

BAD ORIGINALBATH ORIGINAL Dipl.-Phys. Heinridi Seids · Patentanwalt · Bierstadter Höhe 15 · Postfach 5105 · 6200 Wiesbaden 1 · S1 <o 6121) 56 55 82Dipl.-Phys. Heinridi Seids Patent Attorney Bierstadter Höhe 15 PO Box 5105 6200 Wiesbaden 1 S 1 <o 6121) 56 55 82

zum Sitz au!" vier Faso 4 \iu 1 ciikt , uhrn- dar.;; dabei eine Stelle der Kugel oder dos Vent i lsitnt-s überbeansprucht wird und
ausbricht. Die Fase 3 kann in diesem Sinne auch als Verstärkungsfase bezeichnet werden.to the seat au! "four Faso 4 \ iu 1 ciikt, uhrn- dar. ;; thereby one point of the ball or dos valve lsitnt-s is overstressed and
breaks out. In this sense, the bevel 3 can also be referred to as a reinforcing bevel.

ζ Zur Herstellung des Ventilsitzes werden zuerst die beiden ζ To manufacture the valve seat, the two

Fasen 3 und 4 angeläppt, worauf mittels Bürsten poliert wird. Durch das Polieren werden sowohl die Kante 5 als auch die
beiden weiteren, die Fasen 3 und 4 begrenzenden Kanten gebrochen. Es entstehen dabei überall weiche Uebergänge, wasChamfers 3 and 4 are lapped, after which it is polished with a brush. By polishing both the edge 5 and the
two other edges delimiting bevels 3 and 4 broken. There are soft transitions everywhere, what

^O ein Ausbrechen oder Absplittern von Material beim Aufsetzen der Kugel auf den Sitz verhindert. Die dichtende Fase 4 wird mittels einer vorzugsweise aus Hartmetall bestehenden Kugel
geläppt, deren Durchmesser genau dem Durchmesser der nachher verwendeten Ventilkugel entspricht.^ O prevents material from breaking out or splintering when the ball is placed on the seat. The sealing bevel 4 is preferably made of hard metal by means of a ball
lapped, the diameter of which corresponds exactly to the diameter of the valve ball used afterwards.

Wie erwähnt, kann man mit dem dargestellten oder ähnlich ausgeführten Kugelventil Gasdichtheit für Drücke bis zu 6OO bar erzielen. Für den Ventilsitz 1 und die Kugel 2 wird normalerweise dasselbe- Material verwendet.As mentioned, you can use the one shown or similar Ball valve achieve gas tightness for pressures up to 600 bar. For the valve seat 1 and the ball 2 is normally the same material is used.

909851/0057909851/0057

BAD ORIGINALBATH ORIGINAL

Claims (7)

Dipl.-Phys.Heinrich Seids · ['.iltiilanw.ilt · BiiTiLnUer Hohe is · I'nslfa«h 5105 ■ 0200 Wiesbaden 1 · *3£ (061 zij 5653 82 Gasdichtes Kugil^ent il Z 8 2 4 V / J mul Vorfahren zu dossen II« ί r.t ο 1 1 um? PATKNTANSPRUKClIi;Dipl.-Phys. Heinrich Seids mul ancestors to dossen II «ί rt ο 1 1 um? PATKNTANSPRUKClIi; 1. Gasdichtes Kuqolvent.il, dadurch gekennzeichnet, dass die Ventilkugel (2) und dor Ventilsitz (1) aus einem harten Material bestehen, und dass der Ventilsitz eine gebrochene Kante (5) zwischen zwei mit stumpfem Winkel atuünanderstossenden Flächen (3, 4) aufweist, wobei die Ventilkugol auf die eine Fläche (4) aufliegt.1. Gas-tight Kuqolvent.il, characterized in that the The valve ball (2) and the valve seat (1) are made of a hard material, and that the valve seat has a broken edge (5) between two surfaces that meet at an obtuse angle (3, 4), the valve ball on the one surface (4) rests. 2. Ventil nach Anspruch 1, dadurch gekennzeichnet, dass die Ventilkugel (2) und der Ventilsitz (1) aus Si_N. - oder Al3O3 Sinterkeramik, aus Saphir oder aus Rubin bestehen.2. Valve according to claim 1, characterized in that the valve ball (2) and the valve seat (1) made of Si_N. - or Al 3 O 3 sintered ceramic, made of sapphire or ruby. 3. Ventil nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die die Kante (5) bildenden Flächen (3, 4) an einem Ende der Ventilbohrung geformt sind und zusammen eine radiale Breite von 0,06 bis 0,08 mm aufweisen.3. Valve according to claim 1 or 2, characterized in that the edge (5) forming surfaces (3, 4) at one end of the Valve bore are shaped and together have a radial width of 0.06 to 0.08 mm. 4. Ventil nach einem der Ansprüche 1-3, dadurch gekennzeichnet, dass die Flächen (3, 4) Kugelflächen sind.4. Valve according to one of claims 1-3, characterized in that the surfaces (3, 4) are spherical surfaces. 5. Ventil nach den Ansprüchen 3 und 4, dadurch gekennzeichnet, dass die innere Kugelfläche (4) einen Radius von mindestens an-5. Valve according to claims 3 and 4, characterized in that the inner spherical surface (4) has a radius of at least an- 909851/0057 bad. original909851/0057 bathroom. original original inspectedoriginal inspected Dipl.-Phys. Heinrich Saids · Patentanwalt · Bierstadter Höhe 15 · Postfach 5105 · 6200 Wiesbaden 1 · ® (o 61 21) 56 53 82 Dipl.-Phys. Heinrich Saids patent attorney Bierstadter Höhe 15 P.O. Box 5105 6200 Wiesbaden 1 ® (o 61 21) 56 53 82 nähernd 0,75 nun und die aussere Kugelfläche (3) einen Radius
von mindestens annähernd 1,25 mm hat, wobei der Kugeldurclunesser 1,5 mm beträgt.almost 0.75 now and the outer spherical surface (3) a radius
of at least approximately 1.25 mm, the ball diameter being 1.5 mm. 6. Ventil nach einem der Ansprüche 1-5 dadurch gekennzeichnet, J dass die mittlere Neigung der Auflagefläche (3, 4) für die Kugel zur Ventilachse 45 bis 60° beträgt bzw. dass eine der mittleren
Neigung dieser Auflagefläche angepasste Kegelfläche einen
Oeffnungswinkel von 90 bis 120 aufweist.6. Valve according to one of claims 1-5, characterized in that the mean inclination of the bearing surface (3, 4) for the ball to the valve axis is 45 to 60 ° or that one of the mean
Inclination of this support surface adapted conical surface
Has an opening angle of 90 to 120. 7. Verfahren zur Herstellung des Ventils nach einem der Ansprüche W 1 - 6, dadurch gekennzeichnet, dass zuerst die Flächen (3, 4)7. A method for producing the valve according to any one of claims W 1 - 6, characterized in that first the surfaces (3, 4) angeläppt und hierauf der Ventilsitz zum Brechen der die Flächen begrenzenden Kanten (5) poliert wird.lapped and then the valve seat is polished to break the edges (5) delimiting the surfaces. 909851/0057 OWGlNAL INSPECTED909851/0057 OWGlNAL INSPECTED
DE19782824873 1978-06-07 1978-06-07 Gas-tight ceramic ball valve - usable to 600 bar, with edge of seating broken so that surfaces form an obtuse angle Granted DE2824873A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19782824873 DE2824873A1 (en) 1978-06-07 1978-06-07 Gas-tight ceramic ball valve - usable to 600 bar, with edge of seating broken so that surfaces form an obtuse angle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782824873 DE2824873A1 (en) 1978-06-07 1978-06-07 Gas-tight ceramic ball valve - usable to 600 bar, with edge of seating broken so that surfaces form an obtuse angle

Publications (2)

Publication Number Publication Date
DE2824873A1 true DE2824873A1 (en) 1979-12-20
DE2824873C2 DE2824873C2 (en) 1989-08-24

Family

ID=6041194

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19782824873 Granted DE2824873A1 (en) 1978-06-07 1978-06-07 Gas-tight ceramic ball valve - usable to 600 bar, with edge of seating broken so that surfaces form an obtuse angle

Country Status (1)

Country Link
DE (1) DE2824873A1 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0256161A1 (en) * 1986-08-19 1988-02-24 Hewlett-Packard GmbH Mixing valve
FR2650872A1 (en) * 1989-08-09 1991-02-15 Gradel Pierre Non-return valve and regulator structure for introducing a gas into a liquid, and method for producing it
EP0508930A2 (en) * 1991-04-12 1992-10-14 Tecnica E Innovaciones Ganaderas, S.A. (Tigsa) Valve for drinkers and automatic drinker provided therewith
ES2038066A1 (en) * 1991-04-12 1993-07-01 Tigsa Valve for drinkers and automatic drinkers for hens
DE19509145A1 (en) * 1995-03-14 1996-09-19 Rexroth Mannesmann Gmbh Directional seat valve with valve closure in axial housing bore
DE10046734A1 (en) * 2000-09-21 2002-05-16 Siemens Ag Pressure relief valve
DE102009036778A1 (en) 2009-08-08 2011-02-10 Schaeffler Technologies Gmbh & Co. Kg Control drive for internal-combustion engine, has valve seat exhibiting radius and contact diameter that are larger than diameter of valve ball i.e. hollow ball, where valve ball is made of ceramic material e.g. silicon nitride
DE102009036775A1 (en) 2009-08-08 2011-02-10 Schaeffler Technologies Gmbh & Co. Kg Control assembly for internal combustion engine, has valve spring whose one end is supported as pressure spring on ball, and another end is supported on retainer for hub of ball, where diameter of hub of ball is in specific range

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19509776A1 (en) * 1995-03-17 1996-09-19 Rexroth Mannesmann Gmbh Direction-controlled pressure control valve, esp. for pressure redn. and relay valves

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2695628A (en) * 1950-10-19 1954-11-30 Norton Co Check valve
US2931618A (en) * 1959-06-29 1960-04-05 John K Franzreb Shielded valve
US3055391A (en) * 1959-06-16 1962-09-25 Jenkins Bros Valve
US3264718A (en) * 1962-11-19 1966-08-09 Cons Electrodynamics Corp Method for making ball valves
US3887162A (en) * 1972-05-26 1975-06-03 Kernforschung Gmbh Ges Fuer Glandless solenoid valve for corrosive media

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2695628A (en) * 1950-10-19 1954-11-30 Norton Co Check valve
US3055391A (en) * 1959-06-16 1962-09-25 Jenkins Bros Valve
US2931618A (en) * 1959-06-29 1960-04-05 John K Franzreb Shielded valve
US3264718A (en) * 1962-11-19 1966-08-09 Cons Electrodynamics Corp Method for making ball valves
US3887162A (en) * 1972-05-26 1975-06-03 Kernforschung Gmbh Ges Fuer Glandless solenoid valve for corrosive media

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0256161A1 (en) * 1986-08-19 1988-02-24 Hewlett-Packard GmbH Mixing valve
FR2650872A1 (en) * 1989-08-09 1991-02-15 Gradel Pierre Non-return valve and regulator structure for introducing a gas into a liquid, and method for producing it
EP0508930A2 (en) * 1991-04-12 1992-10-14 Tecnica E Innovaciones Ganaderas, S.A. (Tigsa) Valve for drinkers and automatic drinker provided therewith
EP0508930A3 (en) * 1991-04-12 1993-02-03 Tecnica E Innovaciones Ganaderas, S.A. (Tigsa) Valve for drinkers and automatic drinker provided therewith
ES2038066A1 (en) * 1991-04-12 1993-07-01 Tigsa Valve for drinkers and automatic drinkers for hens
DE19509145A1 (en) * 1995-03-14 1996-09-19 Rexroth Mannesmann Gmbh Directional seat valve with valve closure in axial housing bore
DE19509145B4 (en) * 1995-03-14 2005-09-29 Bosch Rexroth Ag Directional seated valve
DE10046734A1 (en) * 2000-09-21 2002-05-16 Siemens Ag Pressure relief valve
DE102009036778A1 (en) 2009-08-08 2011-02-10 Schaeffler Technologies Gmbh & Co. Kg Control drive for internal-combustion engine, has valve seat exhibiting radius and contact diameter that are larger than diameter of valve ball i.e. hollow ball, where valve ball is made of ceramic material e.g. silicon nitride
DE102009036775A1 (en) 2009-08-08 2011-02-10 Schaeffler Technologies Gmbh & Co. Kg Control assembly for internal combustion engine, has valve spring whose one end is supported as pressure spring on ball, and another end is supported on retainer for hub of ball, where diameter of hub of ball is in specific range

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