Plug type control valve having improved means protecting the ste

Details Plug type control valve having improved means protecting the ste Plug type control valve having improved means protecting the ste

1975-11-13

1977-02-15

Scovronek, Joseph

Valves and valve actuation

With actuation lubricating means

23288E, 23288S, B01J 808, F16K 4102

Patent

active

040079120

ABSTRACT:
A plug type valve for use in handling the flow of particulate catalyst is disclosed. In catalytic cracking equipment, it is necessary to regenerate the catalyst. The flow of catalyst to and from the regenerator must be controlled. A plug valve is disclosed for control of the flow of catalyst and the valve includes a tapered spear-like plug formed of a sacrificial material mounted on a stem. The stem is protected against the abrasive action of the particulate catalyst by means of a cylindrical spaced shield below the valve element and a circular jet of steam ejected downwardly below the shield and parallel to the stem.

REFERENCES:
patent: 2664338 (1953-12-01), Cornell
patent: 2668755 (1954-02-01), Kershaw et al.
patent: 2901331 (1959-08-01), Held et al.
patent: 3315700 (1967-04-01), Greenwood
patent: 3339577 (1967-09-01), Teegarden
patent: 3846080 (1974-11-01), MacLean et al.

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