DE3901431C2 - - Google Patents

Info

Publication number
DE3901431C2
DE3901431C2 DE19893901431 DE3901431A DE3901431C2 DE 3901431 C2 DE3901431 C2 DE 3901431C2 DE 19893901431 DE19893901431 DE 19893901431 DE 3901431 A DE3901431 A DE 3901431A DE 3901431 C2 DE3901431 C2 DE 3901431C2
Authority
DE
Germany
Prior art keywords
ptfe
ball valve
ball
valve housing
folds
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.)
Expired - Fee Related
Application number
DE19893901431
Other languages
German (de)
Other versions
DE3901431A1 (en
Inventor
Heinz Battefeld
Werner 5880 Luedenscheid De Boer
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.)
Proflon 5880 Luedenscheid De GmbH
Original Assignee
Proflon 5880 Luedenscheid De GmbH
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 Proflon 5880 Luedenscheid De GmbH filed Critical Proflon 5880 Luedenscheid De GmbH
Priority to DE19893901431 priority Critical patent/DE3901431A1/en
Publication of DE3901431A1 publication Critical patent/DE3901431A1/en
Application granted granted Critical
Publication of DE3901431C2 publication Critical patent/DE3901431C2/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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
    • F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
    • 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
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
    • F16K5/0657—Particular coverings or materials

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Taps Or Cocks (AREA)
  • Valve Housings (AREA)

Description

Die Herstellung von Vollkunststoff-Kugelhähnen aus PTFE war bisher auf Grund der hohen Kaltfuß- und Wärmeausdehnungs-Werte des Werk­ stoffes PTFE nicht möglich.The production of all-plastic ball valves from PTFE was previously due to the factory's high cold foot and thermal expansion values PTFE not possible.

Der Einsatz des fast universell chemikalienbeständigen Werkstoffes PTFE mußte sich deshalb auf die Kugelsitzringe und die Auskleidung eines metallischen Kugelhahngehäuses beschränken.The use of the almost universal chemical-resistant material PTFE therefore had to be on the ball seat rings and the lining of a metallic ball valve housing.

Bei mit PTFE ausgekleideten, metallischen Kugelhahngehäusen besteht jedoch durch die unterschiedlichen Kaltfuß- und Wärmeausdehnungs- Werte die Gefahr der Ablösung der Beschichtung, bzw. die Gefahr der Rißbildung in der Beschichtung, wobei dann bei aggressiven Medien eine Leckage auftreten kann.In the case of metallic ball valve housings lined with PTFE however due to the different cold foot and thermal expansion Evaluate the risk of the coating becoming detached or the risk of Cracking in the coating, whereby then with aggressive media a leak can occur.

Der Erfindung liegt die Aufgabe zugrunde, die durch den hohen Kalt­ fluß und den hohen Wärmeausdehnungskoeffizienten entstehenden Maßver­ änderungen so zu kompensieren, daß die Funktion des Kugelhahns nicht beeinträchtigt wird.The invention has for its object the high cold Flow and the high coefficient of thermal expansion arising To compensate for changes so that the function of the ball valve is not is affected.

Die Schemazeichnung zeigt die konstruktive Lösung des Problems.The diagram shows the constructive solution to the problem.

Das PTFE-Kugelhahngehäuse (2) weist neben den üblichen Verschraubungs­ bohrungen drei im gleichschenkligen Dreieck angeordnete Bohrungen zur Aufnahme von Stiften aus Edelstahl oder alternativ PTFE-Glas (4), so­ wie zwei oder mehrere, umlaufend eingestochene Dehnungsfalten (5a + 5b) auf.In addition to the usual screw holes, the PTFE ball valve housing ( 2 ) has three holes arranged in the isosceles triangle for receiving pins made of stainless steel or alternatively PTFE glass ( 4 ), as well as two or more circumferentially pierced expansion folds ( 5 a + 5 b) on.

Bei der Montage wirkt sich dies wie folgt aus:When installing, this has the following effects:

Die beiden Flansche (1a + 1b) werden mittels Verschraubungen auf Block gegen die im Gehäuse (2) befindlichen Stifte (4) gezogen. Die Stifte sind in ihrer Länge so bemessen, daß danach die Falten nur zu ca. 50% zusammengedrückt sind.The two flanges ( 1 a + 1 b) are screwed onto the block against the pins ( 4 ) located in the housing ( 2 ). The length of the pins is such that the folds are then only about 50% compressed.

Die Falten verhindern nun den für die Funktion schädlichen Kaltfluß und/oder eine schädliche Wärmeausdehnung, da beide Erscheinungen von diesen Dehnungsfalten aufgenommen werden.The folds now prevent the cold flow, which is harmful to the function and / or harmful thermal expansion since both phenomena of these expansion folds are absorbed.

Claims (1)

Kugelhahn, bestehend aus einem zwischen Flanschen (1a, 1b) befind­ lichen Kugelhahngehäuse (2), in dem eine Ventilkugel über Kugelsitz­ anordnungen (3a, 3b) drehbar angeordnet ist, dadurch gekennzeichnet, daß das Kugelhahngehäuse aus PTFE, bzw. PTFE-Compound hergestellt ist und neben an sich bekannten Verschraubungsbohrungen drei im gleich­ schenkligen Dreieck angeordnete Bohrungen zur Aufnahme von Stiften aus Edelstahl oder alternativ PTFE-Glas (4), sowie zwei oder mehrere, umlaufend eingestochene Dehnungsfalten (5a, 5b) aufweist.Ball valve, consisting of a ball valve housing ( 2 ) located between flanges ( 1 a, 1 b), in which a valve ball is rotatably arranged via ball seat arrangements ( 3 a, 3 b), characterized in that the ball valve housing made of PTFE or PTFE compound is produced and, in addition to known screw holes, three holes arranged in the same leg triangle for receiving pins made of stainless steel or alternatively PTFE glass ( 4 ), as well as two or more circumferentially pierced expansion folds ( 5 a, 5 b).
DE19893901431 1989-01-19 1989-01-19 Fully plastic ball valve made from PTFE or a PTFE compound Granted DE3901431A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19893901431 DE3901431A1 (en) 1989-01-19 1989-01-19 Fully plastic ball valve made from PTFE or a PTFE compound

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19893901431 DE3901431A1 (en) 1989-01-19 1989-01-19 Fully plastic ball valve made from PTFE or a PTFE compound

Publications (2)

Publication Number Publication Date
DE3901431A1 DE3901431A1 (en) 1990-08-02
DE3901431C2 true DE3901431C2 (en) 1990-12-20

Family

ID=6372363

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19893901431 Granted DE3901431A1 (en) 1989-01-19 1989-01-19 Fully plastic ball valve made from PTFE or a PTFE compound

Country Status (1)

Country Link
DE (1) DE3901431A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4232082A1 (en) * 1992-09-25 1994-03-31 Ruesch Willy Ag stopcock
DE19900230C2 (en) * 1999-01-07 2001-03-22 Stuebbe Asv Gmbh Shut-off valve

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB970507A (en) * 1962-01-10 1964-09-23 Raybestos Manhattan Inc Lined rotary-spherical fluid-control valves

Also Published As

Publication number Publication date
DE3901431A1 (en) 1990-08-02

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Legal Events

Date Code Title Description
OP8 Request for examination as to paragraph 44 patent law
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee