Sleeve lined plug valves

• US 3,206,163 A
• Filed: 02/21/1963
• Issued: 09/14/1965
• Est. Priority Date: 02/21/1963
• Status: Expired due to Term

• Current Assignee: Jacob B. Freed
• Original Assignee: Jacob B. Freed
• Inventors: Freed, Jacob B.
• Application Number:
  US04/260,952
• Time in Patent Office: 936 Days
• US Class Current: 251/309
• CPC Class Codes: F16K 5/0271 between housing and plug

Claims

4. IN A SLEEVE LINED PLUG VALVE ADAPTED FOR OPERATION OVER A SUBSTANTIAL RANGE OF TEMPERATURES, THE COMBINATION OF A METALLIC BODY HAVING A BORE EXTENDING TRANSVERSELY THEREOF AND PORTS THERETHROUGH OPENING INTO SAID BORE IN ANGULARLY SPACED RELATION, TAPERED METALLIC VALVE PLUG RECEIVED IN SAID BORE AND HAVING A PORT THERETHROUGH FOR ALIGNMENT WITH SAID BODY PORTS, SAID PLUG BEING OF SUFFICIENTLY SMALLER RADIAL DIMENSIONS THAN SAID BORE TO ESTABLISH AN ANNULAR CLEARANCES BETWEEN THE OPPOSED SURFACES THEREOF, A LINEAR SLEEVE RECEIVED IN SAID CLEARANCE AND HAVING PORTS THEREIN MATCHING SAID BODY PORTS, SAID SLEEVE BEING FORMED OF A FLUOROCARBON MATERIAL HAVING A COEFFICIENT FO THERMAL EXPANSION SUBSTANTIALLY GREATER THAN THAT OF SAID PLUG AND BODY, SAID BORE HAVING THEREIN A PAIR OF CONTINUOUS CIRCUMFERENTIAL GROOVES LOCATED RESPECTIVELY ADJACENT OPPOSITE ENDS THEREOF AND IN AXIALLY SPACED RELATION WITH SAID PORTS THEREIN, SAID BORE ALSO HAVING THEREIN AT LEAST TWO IDENTATIONS LOCATED IN SPACED RELATION WITH SAID GROOVES AND WITH SAID BODY PORTS IN EACH OF THE SPACES THEREON BETWEEN SAID PORTS TO PROVIDE A CONTINUOUS LAND ALONG THE SURFACE OF SAID BORE SURROUNDING EACH OF SAID BODY PORTS AND ALSO A CONTINUOUS LAND EXTENDING AROUND SAID BORE SURFACE BETWEEN SAID PORTS AND EACH END OF SAID BORE, SAID BORE INCLUDING A RIB PORTION EXTENDING GENERALLY AXIALLY THEREOF BETWEEN SAID INDENTATIONS IN EACH SAID SPACE, SAID SLEEVE INCLUDING INTEGRAL PORTIONS SUBSTAN TIALLY COMPLETELY FILLING SAID INDENTATIONS AND SAID GROOVES AND COOPERATING WITH THE EDGES THEREOF AND WITH SAID GROOVES TO LOCK SAID SLEEVE AGAINST BOTH ANGULAR AND AXIAL MOVEMENT WITH RESPECT TO SAID BORE, MEANS FOR MAINTAINING HIGH COMPRESSION SEALING ENGAGEMENT OF SAID LINER WITH SAID RIB AND LAND PORTIONS OF SAID BORE SURFACE AND CORRESPONDING PORTIONS OF THE SURFACE OF SAID PLUG, SAID RIBS COOPERATING WITH SAID LANDS TO PROVIDE A HIGH PRESSURE SEAL AREA SURROUNDING THE PLUG IN THE OPEN AND CLOSED POSITION THEREOF WHILE PROVIDING HIGH PRESSURE SEAL AREAS PREVENTING PASSAGE OF FLUID BETWEEN SAID LINER SLEEVE AND SAID BORE AS SAID PLUG IS MOVED FROM THE OPEN TO THE CLOSED POSITION, AND SAID CONTINUOUS CIRCUMFERENTIAL GROOVES COOPERATING WITH SAID PLUG TO MAINTAIN SAID LINER UNDER TENSIONAL STRESSES WHICH ARE A MAXIMUM AT THE LOWER TEMPERATURE IN SAID RANGE AND WHICH ARE PARTIALLY RELIEVED AT THE HIGHER TEMPERATURE IN SAID RANGE WHEREBY SAID SLEEVE RETAINS SUBSTANTIALLY THE SAME DIMENSIONS THROUGHOUT SAID RANGE OF TEMPERATURES.