| 摘要 |
A valve for connection of branch conduits to an existing gas- or liquid-filled conduit (2) which valve (1) comprises a clamping connection (3) for tightly clamping the valve (1) on to the conduit (2) in such a way that the same partially and tangentially penetrates through an opening into a straight flow channel (5) comprised in the valve, one end portion of which channel ends in a connection piece (4) arranged on the clamping connection (3), to which connection piece (4) a tool housing (12) is intended to be connected and from which housing (12) a cutting means in the form of a piston (13) provided with a cutting edge could be operated inside the flow channel (5) in such a way that the cutting edge removes the portion of the conduit (2) which penetrates the flow channel (5). The portion of the surface of the flow channel (5) which surrounds the opening in the conduit being created by the cutting edge constitutes the bottom of a valve housing (8) in which a sealing body (9) fitting against said surface is arranged displaceable and could be brought to seal against the bottom of the valve housing constituted by the flow channel (5) and prevent fluid flow between the conduit (2) and the connection piece (4) of the valve. After the cutting operation and the closing of the valve, the removal of the tool housing (12) with the cut-out portion (17) of the conduit is carried out and the branch conduit is connected to the connection piece (4).
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