Plug valve

Details Plug valve Plug valve

2005-05-17

2005-05-17

Walton, George L. (Department: 3753)

Fluid handling

With cleaner, lubrication added to fluid or liquid sealing...

Cleaning or steam sterilizing

C134S102100, C134S102200, C134S16900A, C134S16900A, C134S171000, C137S238000, C137S377000, C222S148000, C406S132000, C406S163000, C406S174000

Reexamination Certificate

active

06892748

ABSTRACT:
A shield for a plug valve is provided to prevent debris from hindering the movement of moving components of the plug valve. The shield prevents larger sized debris from accumulating at an opening in a wall in which the plug valve is mounted, the wall defining a confined space, such as the interior of a vessel, at least in part. The shield encloses but is spaced from the plug valve and a device is located within a space between the shield and the plug valve for directing a purging gas through the space to sweep away or purge smaller sized debris from the space.

REFERENCES:
patent: 2378607 (1945-06-01), Watts
patent: 2682277 (1954-06-01), Marshall et al.
patent: 4535801 (1985-08-01), Neale
patent: 4552490 (1985-11-01), Neale
patent: 4827967 (1989-05-01), Junier
patent: 5540253 (1996-07-01), Junier
patent: RE36121 (1999-03-01), Junier
patent: 6117317 (2000-09-01), Dickson et al.
patent: 6740241 (2004-05-01), Dickson

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