SHUT OFF VALVE OF LARGE DIAMETER PARTICULARLY A HOT-BLAST SLIDE VALVE

摘要

A large-diameter hot blast slide valve assembly embodying a slide valve member operable within a seat formed within a double walled casing or frame for the purpose of accommodating a coolant fluid introducable thereinto, and having a large diameter central flow passage way formed by an inner jacket wall which also forms the valve seat. One end of a cleanout/control tube is rigidly and sealingly connected with said inner jacket around an aperture formed therein generally opposite the slide valve member and its seat, and the tube projects generally radially through the outer wall of the casing or frame by passing freely through a clearance aperture therein. An outer portion of the cleanout control tube is sealingly connected but in a non-rigid manner to the outer wall of the casing by means of a relatively thin resilient or semi-flexible membrane which may in one form include an annular bellows-like construction, to thereby provide for thermal expansion and contraction movements of the tube relative to both the inner and outer casing walls to relieve potential structural stress and to preclude resultant damage otherwise attendant such thermal-stressed-induced fracturing of such valve assemblies.