Fluid cat cracker apparatus

Details Fluid cat cracker apparatus Fluid cat cracker apparatus

1974-10-24

1977-03-22

Levine, Herbert

Chemistry: physical processes

Physical processes

Crystallization

208164, 251214, 277112, B01J 824

Patent

active

040134237

ABSTRACT:
A fluid cat cracker process and apparatus including at least one shutoff valve having improved valve stem guide apparatus. The valve stem guide apparatus comprises a guide member adapted to be attached within the valve body through which the valve stem is disposed. A plurality of annular grooves positioned one above the other are provided in the interior of the guide member and a plurality of expansible seal rings are disposed in the grooves. The seal rings are of a size and shape such that a seal is provided between the valve stem and the surfaces of the grooves whereby pressurized materials within the valve body are prevented from flowing through the valve stem guide apparatus.

REFERENCES:
patent: 3527694 (1970-09-01), Luckenbach
patent: 3556472 (1968-11-01), Grove et al.
patent: 3582041 (1971-06-01), Priese
patent: 3831900 (1974-08-01), Matousek et al.

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