DK157325B

DK157325B - BALL VALVE

Info

Publication number: DK157325B
Application number: DK452982A
Authority: DK
Inventors: Richard Huber; Peter Wirz
Original assignee: Klinger Ag
Priority date: 1981-10-13
Filing date: 1982-10-13
Publication date: 1989-12-11
Also published as: DK452982A; EP0077058A1; FI823473A0; FI71609C; FI823473L; DE3263559D1; DK157325C; EP0077058B1; FI71609B; ATE13342T1

Abstract

1. Ball valve having a housing, comprising a tubular end section (1', 31") and a central section (1, 31) which is broader than the end section and is connected to the end section by way of a conical intermediate section (12, 31') which has a cone angle of at least 30 , and having a ball (6) which is mounted in the central section, is rotatable from outside by means of an operating bolt (4) and is sealed by means of at least one sealing ring (10) arranged in a support component (11, 32, 42) which is supported against the housing, characterised in that (a) the entire housing (1, 12, 1'; 31, 31', 31") with end sections adjoining either side of the central section by way of conical intermediate sections is constructed in one piece without welding ; (b) the ball (6) is accommodated between two sealing rings (10) each of which is arranged in a support component (11, 32, 42), and (c) the support components are supported against the conical intermediate sections (12, 31') in such a manner that they are sealed.

Description

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Opfindelsen angâr en kuglehane af den i krav l's indledning angivne art. En sâdan kuglehane kendes fra DE-U1-7910913.The invention relates to a ball valve of the kind specified in the preamble of claim 1. Such a ball valve is known from DE-U1-7910913.

5 Denne kendte kuglehane er opbygget asymmetrisk pà en sâdan mâde, at huset ved den ene ende har det rorformede endeafsnit, det dertil tilsluttende mellemafsnit og slutteligt midteraf-snittet udformet i ét stykke. Midterafsnittet er fra forst af âbent, sâledes at kuglen og en tætningsring kan indsættes.This known ball valve is constructed asymmetrically in such a way that the housing at one end has the tubular end section, the adjacent intermediate section and finally the central section in one piece. The center section is open from the first, so that the ball and a sealing ring can be inserted.

10 Tætningsringen bæres af en stottedel af hârdt isoleringsmate-riale, der skubbes ind i midterafsnittet indtil et anslag. Derefter bortles midterafsnittets frie kant over en fas pâ stottedelens ende. Derpâ kan der i et hulgevind af stette-delen indskrues et ror med boltgevind, hvilket rer danner et 15 andet endeafsnit. En i en omkredsnot af stettedelen indlagt tætningsring ligger an imod det cylindriske midterafsnits in-dre frembringerflade.10 The sealing ring is supported by a support portion of hard insulating material which is pushed into the center section until a stop. Then the free edge of the center section is removed over a phase at the end of the support portion. Then, in a hollow thread of the support part, a pipe with bolt thread can be screwed in, which forms a second end section. A sealing ring embedded in a circumferential groove of the socket portion abuts the inner projection surface of the cylindrical center section.

I US-A-2.553.177 beskrives en kuglehane med et fra forst af 20 todelt hus, der i kuglens midterplan er delt pâ tværs af ror-akseretningen, og hvori der i hver del er indlagt en metal-tætning i det væsentlige formet som et korrugeret ror. Hus-halvdelene fores sâ med indlagt kugle mod hinanden indtil man har opnàet den onskede forspænding for tætningerne. I denne 25 position fastgores sâ hushalvdelene til hinanden, f.eks. ved svejsni ng.US-A-2,553,177 discloses a ball valve having a front of 20 bifurcated housing which is divided across the rudder axis in the median plane of the ball and wherein a metal seal is substantially formed in each part as a corrugated rudder. The housing halves are then inserted with a ball into each other until the desired bias is obtained for the seals. In this position, the house halves are fastened to each other, e.g. by welding.

Endvidere beskrives i DE-B-2235557 en kuglehane med et i ét stykke usvejsët hus, der er fremstillet ved spânfri deforme-30 ring. I et emne med màlene for det senere midterafsnit indsættes en i forvejen monteret byggegruppe bestâende af kuglen og to med tætninger forsynede stottedele, hvorefter emnets frie ender trækkes ind, indtil de ligger an imod stottedelenes endekanter. Derefter forbindes disse tætnet med huset, for-35 trinsvis ved hjælp af en inden for omkredsen lagt svejsesom.Further, DE-B-2235557 discloses a ball valve with a one-piece non-welded housing made by tension-free deformation. In a workpiece with the dimensions of the later center section, insert a pre-assembled building group consisting of the ball and two sealed housing parts, after which the free ends of the workpiece are drawn in until they touch the end edges of the housing parts. Then these are sealed to the housing, preferably by means of a welded seam within the circumference.

Qâende ud fra teknikkens indledningsvist definerede stade er det den foreliggende opfindelses formâl at anvise en kugle-In view of the state of the art initially defined, the object of the present invention is to provide a

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2 hane, der pà lignende mâde sont beskrevet i det sidstnævnte skrift har et i ét stykke svejst hus, men som ogsà i evrigt i de for medietryk underkastede omràder ikke har nogen kompli-cerede svejsesemme, der kræver afprovning.2 cocks, similarly described in the latter letter, have a one-piece welded housing, but which also in ethereally subjected to media pressure have no complicated welding seams which require testing.

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Dette formâl tilgodeses ved, at den indledningsvist omtalte kuglehane er ejendommelig ved det i den kendetegnende de! af krav 1 anforte.This purpose is met by the fact that the ball valve initially referred to is peculiar to that of the characteristic ones! of claim 1.

10 Karakteristikonet (a) kendes som nævnt fra skriftet DE-B-2235557, der er af en teknisk set anden art. Dette gælder ogsà for det andet karakteristikon (b), der fremgàr af det oven for nævnte skrift US-A-2573177. Men medens teknikken ifolge det ferste skrift kræver et særligt arbejdstrin til 15 fastlægning og tætning af stottedelene i husets indre og den sidst beskrevne teknik ubetinget nodvendigger et med juste-ringsarbejde forbundet monteringstrin, er det ved hjælp af ka-rakteristiken (c) muligt væsentlig at forenkle hanens frem-stilling, hvorved ligeledes kraft!inierne mellem de koniske 20 mellemafsnit forlober via stottedelene og kuglen under en tilsvarende forspænding af den pâgældende indkoblede pakning.10 As mentioned above, the characteristic icon (a) is known from the specification DE-B-2235557, which is of a different technical nature. This also applies to the second characteristic (b) shown in the above-mentioned specification US-A-2573177. However, while the prior art technique requires a special work step for defining and sealing the support parts in the interior of the housing and the last described technique necessarily requires a mounting step associated with adjustment work, it is possible by means of the characteristic (c) to: simplify the manufacture of the male, whereby the forces between the conical 20 intermediate sections also extend via the supporting parts and the ball, under a corresponding biasing of the engaged packing.

Ved anvendelse med rer med store fremsti11ingstolerancer kan overholdelsen af forspændingen ved hjælp af udligningselemen-ter sikres inden for givne grænseværdier, hvilket imidlertid i 25 mange tilfælde ikke engang er nodvendigt.When used with tubes with large fabrication tolerances, compliance with the bias by means of equalizing elements can be ensured within given limit values, which, however, in many cases is not even necessary.

Da det af okonomiske grunde hyppigt er nedvendigt at benytte rer med store vægtykkelsestolerancer, kan det til opnâelse af den rigtige presning mellem tætningsringene og kuglen være 30 fordelagtigt, i de kraft!inier, der forleber gennem stettede-len, som stotter kuglen ved det koniske mellemafsnit, at ind-koble et fortrinsvis plastisk deformerbart toleranceoptageor-gan, der er lettere deformerbart end tætningsringen, men under driftsmæssig belastning ved kuglen er praktisk taget ude-35 formerbar. Dette toleranceoptageorgan er sâ, afhængig af væg-tykkelsen for den ved husendeafsnittets ydre omformning, mere eller mindre kraftigt aksialt deformeret, men under driftsmæssig belastning ved kuglen fungerer det dog som et praktisk taget stift legeme.Since it is frequently necessary to use tubes with large wall thickness tolerances for economic reasons, obtaining the proper pressing between the sealing rings and the ball may be advantageous, in the forces extending through the support member supporting the ball at the conical intermediate section, to engage a preferably plastic deformable tolerance receiving member which is more easily deformable than the sealing ring, but under operational load at the ball is practically deformable. This tolerance receiving means, depending on the wall thickness of the axially deformed part of the housing end section, is more or less strongly axially deformed, but under operational load at the sphere, however, it acts as a practically rigid body.

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Det skal nævnes, at elastisk understetning af tætningselemen-ter for kuglehaner er almindelig bekendt, dog er disse ifolge deres federkarakteristik kun egnet til at udligne tætningsma-terialets slid eller ved husets deformering betingede for-5 spændinger; men der kan ikke slâs bro hen over sterre af-stande, fordi den elastiske understotning sâ er for svag til uden utilladelig aksial forskydning at optage kuglens drifts-mæssige belastning.It should be mentioned that elastic support of ball valve sealing elements is well known, however, according to their spring characteristics, they are only suitable for offsetting the wear of the sealing material or the stresses of the housing deformed; however, bridging distances cannot be bridged, because the elastic support is too weak to absorb the ball's operating load without unauthorized axial displacement.

10 Ved en egnet udforelsesform for hanen ifolge opfindelsen kan stottedelen selv i et afsnit være udformet som deformerbart toieranceoptageorgan, men det er ogsà muligt at indkoble tole-ranceoptageorganet som særskilt del mellem kuglen og det ko-niske midterafsnit, fortrinsvis som aksial understetning for 15 den med sin omkreds mod stettedelen tætnede tætningsring.In a suitable embodiment of the male according to the invention, the housing part may even be formed in one section as a deformable two-way receiving means, but it is also possible to connect the tolerance recording means as a separate part between the ball and the conical center section, preferably as axial support for the part. with its circumference towards the stitch portion sealed ring.

Denne aksiale understotning kan være en ring af plast, hvis deformerbarhed er storre end for tætningsringens materiale. I denne forbindelse mâ man være opmærksom pà, at en fuldstændig omslutning af plastringen fuldstændigt kan forhindre dennes 20 deformering, sàledes at den ikke længere ville kunne udfore den denne tiltænkte funktion.This axial support may be a plastic ring whose deformability is greater than that of the sealing ring material. In this connection, it should be noted that a complete enclosure of the plastic ring can completely prevent its deformation, so that it would no longer be able to perform this intended function.

Opfindelsen forklares nedenfar pâ grundlag af tegningen, hvori 25 fig. 1 og 2 viser to kuglehaner if01ge opfindelsen set i aksialt snit.The invention is explained below with reference to the drawing, in which FIG. 1 and 2 show two ball valves according to the invention in axial section.

Den i fig. 1 vis te kuglehane har et af ror fremstillet hiis 1.The FIG. 1 certain tea ball valve has one helm made from rudder 1.

30 I et dermed sammensvejset r0rstykke 2 er der lejret en via O-ringe 3 mod det ydre tætnet forskydningsbolt 4, der pâ sin ydre ende bærer et hândgreb 5, og som med sin i huset belig-gende ende er i indgreb med den koblingsleddannende kugle 6 sâledes, at denne kan drejes ved hjælp af hândgrebet 5r 35 o hvorved et anslag 7 begrænser drejningsforskydningen til 90 .In a welded pipe piece 2 there is mounted a via O-rings 3 against the outer sealed shear bolt 4 which carries on its outer end a handle 5 and which engages the coupling conducting ball with its end located in the housing. 6 so that it can be rotated by the handle 5r 35 o whereby a stop 7 limits the rotational displacement to 90.

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Kuglen 6 er lejret drejeligt mellem tætningsringene 10, der via af metalpladeformede st0ttedele 11 stâr i forbindelse med husr0ret l's indre omkreds. Disse st0ttedele 11 bestâr af to nabostillet anbragte skiveformede metalpladeformdele 11', 11". Ved den indre rand er disse udformet sâledes, at de i fællesskab danner optageorgan for tætningsringen 10; pâ den ydre ring har de to cylindriske, mcdr0rhuset 1 anliggende, randafsnit, der viser væk fra hinanden.· Disse randafsnit st0tter sig i aksial retning mod r0rhuset l's indad vendende 10 omformninger. Den viste kuglehane har indtrukne cylindriske husendeafsnit 1', der i forhold til midterstykket af huset 1, der har den oprindelige r0rdiameter, har en mindre diame-ter, hvilket blev opnâet ved efterf01gende plastisk defor-mering af det cylindriske r0r. Koniske mellemafsnit 12 mellem husendeafsnittet 1’ tjener som st0tte for de udadven-dende randafsnit af de ydre skiveformede metalpladeformdele 11", hvorimod de hen imod hanens midte rettede randafsnit af de indre skiveformede metalpladeformdele 11" st0tter imod i omkredsretningen forl0bende indadrettede vulster 13. I denne forbindelse er det ogsâ fordelagtigt, nâr randafsnit-tene har mindre konicitet sâledes, at de med forspænding ligger an imod den indre omkreds af huset 1. I omrâdet for overgangene mellem de koniske afsnit af metalpladeformdelene 11', 11" til randafsnittene er der anbragt en 0-ring 14, der ogsâ ligger an imod den indre omkreds af r0rhuset 1 sâledes, at de to metalpladeformdele 11', 11" og huset 1 er tætnet over for hinanden. De to skiveformede metalpladeformdele 11', 11", der danner st0ttedelen 11 til at optage tætningsringene 10, kan ved punktsvejsning forbindes til et stykke, 3 0 hvorved O-ringen 14 rager frem over randafsnittene og derfor ved indf0ring i r0rhuset 1 slæber mod den indre omkreds af huset 1; men det er ogsâ muligt at indsætte de to skiveformede metalpladeformdele 11' i kuglehanen sâledes, at O-ringen 14 kan indf0res uden at glide særlig meget mod huset 1.The ball 6 is pivotally mounted between the sealing rings 10, which are connected by means of metal plate-shaped support parts 11 in connection with the inner circumference of the housing tube 1. These support members 11 consist of two adjacent disc-shaped metal plate mold parts 11 ', 11 ". At the inner edge, these are jointly formed as receiving members for the sealing ring 10; on the outer ring, the two cylindrical, inner casing housing 1 has a peripheral edge, · These peripheral sections support in axial direction against the inwardly-facing 10 transformations of the tube housing 1. The ball valve shown has indented cylindrical housing end portions 1 'which, in relation to the center piece of the housing 1, having the original tube diameter diameters which were obtained by subsequent plastic deformation of the cylindrical tube. Tapered intermediate portions 12 between housing end portions 1 'serve as support for the outward peripheral portions of the outer disc-shaped metal plate mold portions 11 ", while facing the center portions of the male. of the inner disc-shaped metal plate mold members 11 "support inwardly directed beads 13 extending circumferentially. it is also advantageous when the edge sections have less conicity so that they bias against the inner circumference of the housing 1. In the area of the transitions between the tapered sections of the metal plate mold parts 11 ', 11 "to the edge sections, an 0- ring 14, which also abuts the inner circumference of the tube housing 1 so that the two metal plate mold members 11 ', 11 "and the housing 1 are sealed to each other. The two disc-shaped metal plate mold members 11 ', 11 "forming the supporting part 11 for receiving the sealing rings 10 can be connected by point welding to a piece, whereby the O-ring 14 protrudes over the peripheral sections and therefore by introduction into the tube housing 1 tugs towards the inner perimeter of housing 1, but it is also possible to insert the two disc-shaped metal plate molds 11 'into the ball valve so that the O-ring 14 can be inserted without sliding very much against the housing 1.

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Til fremstilling af kuglehanen kan man enten fçSrst pâ en side fremstille det cylindriske husendeafsnit 1', derpâ efter hinanden indf0re en St0ttedel 11, kuglen 6 og den anden st0ttedel 11 og fiksere disse i den rigtige stilling i huset 5 1, hvorpâ sâ de 0vrige formforandringer for r0rhuset 1 fore tages. Menddet er ogsâ muligt i det ikke omformede r0r at indsætte de indre dele 10, 11, 6 og f0rst derpâ samtidig gennemf0re aile omformninger af r0ret. En konusvinkel a pâ 50° sikrer i denne forbindelse, at akaial-afstanden mellem 10 mellemafsnittene 12's inderflader ikke varierer utilladelig som f01ge af r0rtolerancerne. Ved fiksering af kuglehanens indre dele 10, 11, 6 pâ det rigtige hussted kan der f0r hu-sets omformning ogsâ ved hjælp af en spændindretning s0rges for, at st0ttedelene 11 ved deres ydre omkreds bevæges sâ 15 meget i forhold til hinanden, at metalpladeformdelene 11', 11" omformes i det konisk forl0bende afsnit og under forspænding ligger an imod tætningsringene 10. En sâdan elastisk forspænding er frem for ait pâkrævet ved st0rre driftstryk, for at kuglen 6's presning endnu er tilstrækkelig efter noget 20 slid af tætningsringene 10. Den viste konstruktion muligg0r ved en kuglehane med et i et stykke formet r0rformet hus 1 en svejseteknisk enkel konstruktion, der sikrer en sikker funktion.For the manufacture of the ball valve, one can either first produce on one side the cylindrical housing end portion 1 ', one after the other inserting a support part 11, the ball 6 and the other support part 11 and fixing them in the correct position in the housing 5 1, whereupon the other shape changes for the tube house 1 is made. The sleeve is also possible to insert the inner parts 10, 11, 6 into the non-reshaped tube and only then simultaneously perform all reshaping of the tube. A cone angle of 50 ° ensures in this connection that the axial distance between the inner surfaces of the 10 intermediate sections 12 does not vary unacceptably as a result of the pipe tolerances. By fixing the inner parts 10, 11, 6 of the ball valve in the correct housing, the housing can also be transformed by means of a tensioning device so that the supporting parts 11 at their outer circumference are moved so much relative to each other that the metal plate molding parts 11 11 "is reshaped in the tapered section and under tension bears against the sealing rings 10. Such elastic bias is required rather than at greater operating pressure so that the ball 6's pressing is still sufficient after some 20 wear of the sealing rings 10. The shown construction by a ball valve with a one-piece tubular housing 1 enables a simple welding technically to ensure safe operation.

25 Den i fig, 2 viste kuglehane har et af et r0r fremstillet hus 31, hvor ogsâ forskydningsbolten 4's styring er formet ud fra selve r0ret. Huset 31 har sâledes ikke nogen svejse-s0m. De ved formgivning pâ r0rets ydervæg dannede koniske mellemafsnit 31’, der derpâ gâr over i cylindriske husende-30 afsnit 31", har en konusvinkel a pâ 60°. Ved anvendelse af et r0r med normale r0rtolerancer kan man med et kuglegen-neml0b pâ 40 mm variere aksialafstanden mellem indervæggene af de koniske mellemafsnit 31' ca. 1,5 mm og den stejle konusvinkel er i dette tilfælde ikke uden tilvejebringelse af 35 ekstra forholdsregler tilstrækkelig til at holde presningen mellem kuglen 6 og tætningsringene 10 inden for tilladelige grænser.The ball valve shown in Fig. 2 has a housing 31 made of a pipe, in which the guide of the shear bolt 4 is also formed from the pipe itself. The housing 31 thus has no welding seams. The conical intermediate sections 31 'formed on the outer wall of the pipe, which then pass into cylindrical housing sections 31 ", have a cone angle a of 60 °. By using a tube with normal pipe tolerances, a ball penetration of 40 In this case, without the provision of 35 additional precautions, the axial distance between the inner walls of the conical intermediate sections 31 'about 1.5 mm and the steep cone angle is not sufficient to keep the pressing between the ball 6 and the sealing rings 10 within permissible limits.

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Til venstre i fig. 2 vises drejede st0ttedele 32, der med en konisk flade st0tter sig mod den indre væg af mellemaf-snittet 31', idet en O-ring 33 er tilvejebragt for tætning.To the left of FIG. 2, rotated support members 32 are shown which with a tapered surface support against the inner wall of the intermediate section 31 ', with an O-ring 33 provided for sealing.

Ved den anden ende er der pâ st0ttedelen 32 til tætning over 5 for kuglen 6 anbragt tætningsringen 10, der er indsat tæt-nende i st0ttedelen 32's ydre omkreds. Mellem st0ttedelen 32 og tætningsringen 10 er der indkoblet en tallerkenfjeder- agtig styredel 34, der ogsâ tjener til at udligne tætningsringen 10’s slid efter længere drifttid eller til at udligne 10 forspændinger, der opstâr pâ grund af deformering af huset 31 pâ grund af ydre kræfter eller varmepâvirkninger. St0tte-delen 32 har i omrâdet mellem de to ved enderne tilvejebragte tætninger udefra henholdsvis indefra forl0bende ringnoter 35, 36, der danner et aksialt deformerbart toleranceopta-15 georgan.At the other end, sealing ring 10 is provided on sealing member 32 for sealing above 5, which is sealingly inserted into the outer circumference of the support member 32. Between the support part 32 and the sealing ring 10, a plate-like spring member 34 is also connected, which also serves to equalize the wear of the sealing ring 10 after longer operating time or to offset 10 prestresses arising from deformation of the housing 31 due to external forces or varmepâvirkninger. The support member 32 has in the region between the two seals provided at the ends from the outside and from the inner ring grooves 35, 36 respectively, which form an axially deformable tolerance receiving member.

Den i fig. 2 viste kuglehane viser et hus 31 med en af to-lerancerne betinget st0rste aksialafstand mellem de koniske indre vægge af mellemafsnittene 31*. Toleranceoptageorganet 20 deformeres sâledes, og ringnoterne 35, 36 i st0ttedelen 32 har parallelle vægge. I det tilfælde, hvor der betinget af tolerancerne ved fremstillingen fremkommer en mindre aksial afstand mellem de koniske indre vægge, ville st0ttedelen 32 blive aksial forkortet ved, at væggen 37 mellem ringnoterne 25 35, 36 formes konisk; derved udflades det radiale afsnit for styredelen 34. Deformeringsmodstanden for dette toleran-ceoptageorgan i st0ttedelen 32 skal i denne forbindelse være sâ stor, at der ganske vist under husfremstillingen muligg0-res en deformering uden beskadigelse af tætningsringen 10, 30 men at i lukket tilstand under driftstryk den ulejrede kugle 6 sikkert st0ttes uden yderiigeB aksialforskydning. Pâ denne mâde kan man altsâ udligne de ved r0rets ydre deformering ved tykkelsestolerancen betingede aksialafstande mellem de koniske indre vægge, uden at st0ttedelene 32 efter r0rets 35 formgivningsproces skal forbindes fast med dette.The FIG. 2 shows a housing 31 having a maximum axial distance conditional on the two lances between the conical inner walls of the intermediate sections 31 *. The tolerance pickup member 20 is thus deformed and the ring grooves 35, 36 of the support member 32 have parallel walls. In the case where, subject to the tolerances of manufacture, a smaller axial distance between the conical inner walls appears, the support portion 32 would be axially shortened by forming the conical wall 37 between the ring grooves 25, 36; thereby flattening the radial portion of the guide member 34. The deformation resistance of this tolerance receiving member in the support member 32 must be so large in this connection that, although during the manufacture of the housing, a deformation is possible without damaging the sealing ring 10, 30 but in closed condition during operating pressure, the unalloyed ball 6 is safely supported without additional axial displacement. In this way, the axial distances conditional on the thickness tolerance of the pipe can be equalized between the conical inner walls, without the support parts 32 having to be connected to the pipe after the shaping process of the pipe 35.

Den h0jre side viser en udf0relsesform for en st0ttedel 40 i form af en metalpladeformdel, der tætnende pâ inderkappen optager tætningsringen 10. St0ttedelen 40 har ganske vistThe right side shows an embodiment of a support part 40 in the form of a metal plate mold part which sealingly seals the sealing ring 10. The support part 40 has admittedly

Claims

7 DK 157325 B in the axial direction a small intrinsic elasticity, but can not absorb the large future tolerances. Therefore, a plastic ring 42 is provided between the guide member 41 and the support member 40, which in the situation shown (maximum axial distance) 5 is not deformed. With the largest pipe thickness, at the deformation of the pipe, the support part 40 (under flattening of the guide part 41) is moved closer to the ball 6, whereby the plastic ring 42 formed as a tolerance receiving means is deformed plastic inwardly under thickness. Eg. For example, the plastic ring 42 may be formed of polytetrafluoroethylene (PTFE), whereas the sealing ring 10 may be formed of fiberglass reinforcer PTFE. Since the compressive strength of fiberglass-reinforced PTFE is about twice that of simple PTFE, the tolerance-dependent displacement of the support member 40 against the ball 6 PTFE-15 ring and not the sealing ring 10. The molding of the rubber-elastic plastic ring 42 of rubber material would deform. most cases would be a more unfavorable solution. Except that nearly all rubber elastic materials have a lower temperature stability than PTFE, the tolerance pickup means would have to be designed significantly longer to maintain the forces acting approximately sealed via the sealing ring 10 on the ball 6 for the upcoming deformation paths. If so, a tolerance-absorbing means made of resilient plastic should also be partially inserted inside. The same applies to a tolerance absorber which would be made of a metallic spring because, for the above reasons, this would also have to be designed longer than a tolerably plastic deformable tolerance absorber. 30 Patent claims. Ball valve having a housing consisting of a tubular end portion (1 ', 31') and a central portion (1, 31) extended relative thereto, which over a conical menus portion (12, 31 ') having a cone length of at least 30 ° is connected to the end section (1 ', 31 *), and to a ball (6) mounted in the center section, which can be rotated from outside by means of DK 157325B and which is sealed by at least one sealing ring disposed in a sealing member (11; 32; 42) positioned relative to the housing, characterized in, 5 (a) that the entire housing (1, 12, 1 ', 31, 31', 31 ") of is known per se in one piece and is welded to both sides of the middle section in end portions connecting via conical intermediate sections, 10 (b) that the ball (6) is similarly known per se. taken between two sealing rings (10) disposed in each of the support members (11, 32, 42), and (c) that the support members are sealed against the conical intermediate, 15 sections (12, 31 ') ·

Ball valve according to claim 1, characterized in that a preferably plastic deformable tool is engaged in power lines extending through the stiffener (32; 40) supporting the ball (6) towards the conical center section (12, 20 31 '). rance pickup means (35, 36; 42), which are more easily deformed than the sealing ring (10), but which under operational load at the ball (6) is practically undeformable.

Ball valve according to claim 2, characterized in that the support part (32) is formed in a section r as a deformable tolerance receiving means.

Ball valve according to claim 2, characterized in that the two-lance pick-up means (42) is formed as an axial support for the sealing ring (10) enclosed by the sealing member (40).

Ball valve according to claim 4, characterized in that the tolerance pick-up member (42) is a ring of plastic whose deformability is stronger than that of the seal ring (10).