×

Shut-off valve for high temperature erosive flow

  • US 4,331,316 A
  • Filed: 11/21/1980
  • Issued: 05/25/1982
  • Est. Priority Date: 11/21/1980
  • Status: Expired due to Term
First Claim
Patent Images

1. A shut-off valve for high temperature erosive flow, comprising,a body provided with a flow passage through it including an inlet extending into an entry portion extending into an enlarged internal chamber which includes an outlet downstream thereof, initial erosion point of the flow passage caused by the erosive flow occurring upstream of the entry,a valve seat disposed in the flow passage adjacent the entry portion into the enlarged internal chamber, the valve seat having an extended conical seating surface downstream of the initial erosion point and out of direct flow through the flow passage,a valve member having a coacting conical valve seating surface arranged to seat on the valve seating surface of the valve seat,means disposed in the enlarged internal chamber operable to rotate the valve member to seat the valve seating surface thereof against the valve seating surface of the valve seat to close the valve and to rotate the valve member out of the direct flow through the flow passage to open the valve,said means including a rotatably mounted shaft disposed in the enlarged internal chamber out of the direct flow path,means connecting the valve to the shaft effective so that rotation of the shaft rotates the valve member and opens and closes the valve,whereby, erosion of the flow passage and valve seat upstream of the conical seating surface of the valve seat does not prevent an effective closure of the valve, said conical valve seating surface of said valve member seating exclusively on the most downstream portion of the extended conical seating surface of said valve seat with erosion of said extended conical seating surface of said valve seat occurring only at the most upstream portion thereof, said upstream and downstream portions being spaced apart.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×