On-off valve, particularly for insulation by-pass of exhaust...

Details On-off valve, particularly for insulation by-pass of exhaust... On-off valve, particularly for insulation by-pass of exhaust...

2005-05-03

2005-05-03

Lee, Kevin (Department: 3753)

Fluid handling

Systems

Flow path with serial valves and/or closures

C137S559000, C251S298000, C251S284000, C251S359000

Reexamination Certificate

active

06886594

ABSTRACT:
The invention relates to on-off valve, particularly for insulation by-pass of exhaust gas expansion turbines of catalytic cracking plants, of the type comprising a hollow valve body, an opening for the inlet of the gas into the valve, an opening for the outlet of the gas from the valve, at least a shutter and the relevant at least one seat, the valve being characterized in that it comprises a conduit coupled to the inlet opening and a conduit coupled to the outlet opening, the at least one seat being coupled to the inlet conduit or to the outlet conduit and the at least one shutter having a cover shape and sealing engaging with the seat by a rotatory motion transmitted to the shutter by an actuator by a drive shaft and a drive arm.

REFERENCES:
patent: 3854497 (1974-12-01), Rosenberg
patent: 4846212 (1989-07-01), Scobie et al.

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