Valves and valve actuation – Tube compressors – Perpendicularly reciprocating tube contacting element
Patent
1994-04-15
1999-11-30
Fox, John
Valves and valve actuation
Tube compressors
Perpendicularly reciprocating tube contacting element
251 4, 251358, F16K 704
Patent
active
059928182
ABSTRACT:
A pinch type control valve uses an elastic sleeve having main flanges at each end of a center pinch section with flange gasket extensions on each end. The flanges of the flange gasket extensions project through metal backing flanges and each cooperates with a machined countersunk annular face groove on such metal backing flanges to pull the flange of the gasket extension radially outwardly as it is compressed. Offset annular beads on the opposite faces of the flange of the gasket extension help in achieving the required radial tensioning regardless of the type of flanging of the system. The annular face groove in the metal flange readily accommodates either flat or raised face pipe flanging. The metal backing flange fits between the main flange and the gasket flange and doesn't require the presence of the valve housing. This enables the sleeve to be tested without complete assembly. The sleeve center section is reinforced from the main flanges through a built up center hat section which forms shoulders substantially abutting but not joined to the root portions of the contiguous main flanges. This provides hinge points for the reinforcement avoiding significant stretch and enabling the center section to be considerably axially shortened. Also disclosed is a method of making the sleeve, the valve, and a method of installing the valve in a pipe system, or sleeve alone for testing.
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Fagaly Dale Everett
Jones Gary Lee
Fox John
Martin Fred J.
Rausch Edward W.
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