Gate valves and methods of connecting same

Details Gate valves and methods of connecting same Gate valves and methods of connecting same

1992-02-03

1994-02-15

Bradley, Paula A.

Metal fusion bonding

Process

With protecting of work or filler or applying flux

29890131, B23K 3100

Patent

active

052859517

ABSTRACT:
A method of connecting pipes to a gate valve assembly includes the steps of turning a wedge-shaped valve member having a heat sensitive sealing disc to a fully open position so that the disc is further away from a weld seam than when the disc is in a closed position. A pipe is then sealed to the gate valve assembly while the heat sensitive sealing disc is in the open position. Heat from the sealing operation is thus prevented from damaging the heat sensitive sealing disc.

REFERENCES:
patent: 4235003 (1980-11-01), Gachot
patent: 4972577 (1990-11-01), Dierikx

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