Fluid handling – With repair – tapping – assembly – or disassembly means – Assembling – disassembling – or removing cartridge type valve
Patent
1996-12-23
1998-08-18
Walton, George L.
Fluid handling
With repair, tapping, assembly, or disassembly means
Assembling, disassembling, or removing cartridge type valve
137317, 1376371, 1376373, 251305, 251308, F16K 122, F16K 4300
Patent
active
057946477
DESCRIPTION:
BRIEF SUMMARY
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a 371 of PCT/GB95/00764, filed Apr. 4, 1995.
This invention relates to a valve system and in particular relates to a butterfly valve system which may be used to prevent exposure of material to the environment during transfer from one container to another.
For example it may be necessary to isolate a chemical e.g. a pharmaceutical material, from contamination e.g. airborne contamination, in order to maintain purity or sterility. Alternatively, if the material is toxic there is a need to prevent harmful contamination of the surrounding environment and/or atmosphere.
The valve system of the present invention is intended to meet these requirements.
In accordance with the invention a valve system comprises a first member having a first circular aperture sealable by a first disc connected to a first shaft provided with a formation, a second member having a second circular aperture sealable by a second disc having a second shaft provided with a formation complementary to that provided on the first shaft, the first and second members being capable of being connected together with the first disc positioned alongside the second disc with the formation on the first shaft interengaged with the formation on the second shaft, and the first and second discs being capable of simultaneous rotation about a single axis.
Preferably the first and second members are provided with first and second seals respectively against which the first and second discs seat in the closed condition.
Preferably a locking device is provided associated with one of the first and second members to ensure that the associated aperture on one of the first and second members remains closed while the first and second members are not connected.
A first stub axle provided with a formation may be connected to the first disc diametrically opposite to and coaxial with the first shaft, and a second stub axle provided with a formation complementary to that provided on the first stub axle may be connected to the second disc diametrically opposite to and coaxial with the second shaft, whereby when the first and second members are connected together with the first disc positioned alongside the second disc, the formation on the first stub axle is interengaged with the formation on the second stub axle.
Alternatively, the second stub axle may be connected to the first disc and/or interengaged with the first stub axle.
Two embodiments of the invention will now be described by way of example with reference to and as illustrated in the accompanying drawings of which:
FIG. 1 shows a cross-section through part of a containment assembly including a valve system in accordance with the first embodiment of the invention;
FIG. 2 shows a cross-section through part of the assembly shown in FIG. 1 on an enlarged scale;
FIG. 3 shows a cross-section through part of the assembly shown in FIG. 1 on a further enlarged scale and including a locking device;
FIG. 4 is a perspective view from one side of the first member and first disc of the valve system according to the second embodiment of the invention;
FIG. 5 is a cross-sectional view of the valve system according to the second embodiment;
FIG. 6 is a perspective view from the other side (compared to the view of FIG. 4) of the valve system of the second embodiment; and
FIG. 7 is an exploded view of the valve system of the second embodiment.
The containment assembly shown in FIGS. 1-3 comprises a valve system in accordance with the first embodiment of the invention and comprises two members: a vessel valve body 3 and a pack valve body 4. Two vessel valve bodies are intended to be secured to a vessel in which processing occurs, one to an inlet of the vessel and the other to an outlet. The vessel is constructed of a material suitable to withstand processing reactions within. The pack valve body is attached to a portable pack 12 in which material to be processed may be conveyed to the processing equipment or in which processed material may be conveyed away form the processin
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Denmark Martin William
Haseley Phillip John
BTR plc
Walton George L.
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