DE3901431A1 - Fully plastic ball valve made from PTFE or a PTFE compound - Google Patents
Fully plastic ball valve made from PTFE or a PTFE compoundInfo
- Publication number
- DE3901431A1 DE3901431A1 DE19893901431 DE3901431A DE3901431A1 DE 3901431 A1 DE3901431 A1 DE 3901431A1 DE 19893901431 DE19893901431 DE 19893901431 DE 3901431 A DE3901431 A DE 3901431A DE 3901431 A1 DE3901431 A1 DE 3901431A1
- Authority
- DE
- Germany
- Prior art keywords
- ptfe
- expansion
- ball
- seams
- cold
- 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
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)
Abstract
Description
Die Herstellung von Vollkunststoff-Kugelhähnen aus PTFE ist bisher auf Grund der hohen Kaltfluß- und Wärmeausdehnungs-Werte des Werk stoffes PTFE nicht möglich.The production of all-plastic ball valves made of PTFE is currently due to the factory's high cold flow and thermal expansion values PTFE not possible.
Der Einsatz des fast universell chemikalienbeständigen Werkstoffes PTFE muß sich deshalb auf die Kugelsitzringe und die Auskleidung eines metallischen Kugelhahngehäuses beschränken.The use of the almost universal chemical-resistant material PTFE must therefore be on the ball seat rings and the lining of a metallic ball valve housing.
Bei mit PTFE ausgekleideten, metallischen Kugelhahngehäuse besteht jedoch durch die unterschiedlichen Kaltfluß- 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 flow 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.
Für uns als PTFE-Verarbeiter stellte sich das Problem, die durch den hohen Kaltfluß und den hohen Wärmeausdehdnungskoeffizienten entstehen den Maßveränderungen so zu kompensieren, daß die Funktion des Kugel hahns nicht beeinträchtigt wird.For us as a PTFE processor, the problem posed by the high cold flow and the high coefficient of thermal expansion arise to compensate for the dimensional changes so that the function of the ball hahns is not affected.
Unsere Schemazeichnung zeigt, wie wir das Problem konstruktiv gelöst haben.Our schematic drawing shows how we solved the problem constructively to have.
Das eigentliche PTFE-Kugelhahngehäuse (2) weist neben den üblichen Verschraubungsbohrungen drei im gleichschenkligen Dreieck angeordnete Bohrungen zur Aufnahme von Stiften aus Edelstahl oder alternativ PTFE- Glas (4), sowie zwei oder mehrere, umlaufend eingestochene Dehnungs falten (5a + 5 b) auf.The actual PTFE ball valve housing ( 2 ) has, in addition to the usual screw holes, 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 recessed 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 (1 a + 1 b) 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.
Damit ist das Problem gelöst. Die Innovation besteht in den konstruk tiven Merkmalen Stiftblock und Dehnungsfalten im Kugelhahngehäuse.This solves the problem. The innovation consists in the construct tive features pin block and expansion folds in the ball valve housing.
Claims (1)
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 true DE3901431A1 (en) | 1990-08-02 |
DE3901431C2 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) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4232082A1 (en) * | 1992-09-25 | 1994-03-31 | Ruesch Willy Ag | stopcock |
DE19900230A1 (en) * | 1999-01-07 | 2000-08-10 | Stuebbe Asv Gmbh | Shut-off valve |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH382509A (en) * | 1962-01-10 | 1964-09-30 | Raybestos Manhattan Inc | Internally lined rotary valve |
-
1989
- 1989-01-19 DE DE19893901431 patent/DE3901431A1/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH382509A (en) * | 1962-01-10 | 1964-09-30 | Raybestos Manhattan Inc | Internally lined rotary valve |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4232082A1 (en) * | 1992-09-25 | 1994-03-31 | Ruesch Willy Ag | stopcock |
DE19900230A1 (en) * | 1999-01-07 | 2000-08-10 | Stuebbe Asv Gmbh | Shut-off valve |
DE19900230C2 (en) * | 1999-01-07 | 2001-03-22 | Stuebbe Asv Gmbh | Shut-off valve |
Also Published As
Publication number | Publication date |
---|---|
DE3901431C2 (en) | 1990-12-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE3424121A1 (en) | Optical lens | |
US2985473A (en) | Floating seal | |
DE3901431A1 (en) | Fully plastic ball valve made from PTFE or a PTFE compound | |
DE2624001A1 (en) | TWO PIECE INNER LINED PUMP HOUSING FOR HIGH PRESSURE | |
DE3010278A1 (en) | WINDOW | |
DE1921896A1 (en) | Throttle valve or slide with a sealing insert | |
EP0309678B1 (en) | Method for making a ball plug for a plug valve | |
EP0313717B1 (en) | Valve for a pipe | |
DE2036243A1 (en) | Mechanical seal | |
DE4410094A1 (en) | Guide ring seal with changeable insert | |
DE10000601C2 (en) | Liquid chromatography column | |
DE2129613A1 (en) | Temperature-dependent overflow valve | |
AT205247B (en) | Device for voltage-free connection of gas meters and other flow devices | |
DE2711023A1 (en) | PTFE-coated ball cock used in contact with corrosive materials - the ball being clamped between two PTFE-lined connectors, using PTFE seating rings | |
DE664961C (en) | Socket pipe connection | |
DE2150631A1 (en) | FITTING HOUSING LOCK | |
DE7707794U1 (en) | BALL VALVE | |
CH526711A (en) | Device for attaching a cover to an apparatus housing body | |
DE1683835U (en) | WATCH CASE. | |
AT205425B (en) | Eccentric shift lever for sanitary fittings | |
DE2554951C2 (en) | Flameproof bushing for level switch | |
DE1948579U (en) | BALL VALVE WITH PLASTIC LINING. | |
CH348020A (en) | Hand switches, in particular for pneumatic control or regulating systems | |
DE2417893A1 (en) | FLOW CONTROL UNIT | |
DE4028893A1 (en) | Valve spindle in its housing - has recess at height corresponding to shoulder in housing internal bore, seating loacting disc |
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 |