Gate valve

Details Gate valve Gate valve

1995-12-01

1999-03-09

Ferensic, Denise L.

Valves and valve actuation

Reciprocating valve

Gate

F16K 300

Patent

active

058789944

ABSTRACT:
A gate valve having a bolted bonnet is modified by welding a first ring to the valve bonnet and a second identical ring to the valve housing with weld beads on the inner edge of the rings. After mating the bonnet and the housing, a final weld is made joining the outer edges of the two rings.

REFERENCES:
patent: 1293874 (1919-02-01), Murray
patent: 3356334 (1967-12-01), Scaramucci
patent: 3556472 (1971-01-01), Grove
patent: 3749114 (1973-07-01), Johnstone
patent: 3778030 (1973-12-01), Carlin
patent: 4054978 (1977-10-01), Freeman et al.
patent: 4344354 (1982-08-01), Chan
patent: 4347865 (1982-09-01), Worley
patent: 4610430 (1986-09-01), Besnard
patent: 4709901 (1987-12-01), Pierson

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