VALVE BONNET ASSEMBLY

• US 20110068288A1
• Filed: 09/07/2010
• Published: 03/24/2011
• Est. Priority Date: 09/18/2009
• Status: Active Grant

• Current Assignee: Parker Intangibles LLC (Parker-Hannifin Corporation)
• Original Assignee: PGI International LTD (Parker-Hannifin Corporation)
• Inventors: NIMBERGER, SPENCER M.
• Granted Patent: US 9,328,843 B2
• Time in Patent Office: Days
• US Class Current: 251/366
• CPC Class Codes: F16K 1/04 with a cut-off member rigid with the spindle, e.g. main valves
• CPC Class Codes: F16K 1/385 contacting in the closed position, over a substantial axial length, a seat surface having the same inclination
• CPC Class Codes: F16K 1/422 attachable by a threaded connection to the housing
• CPC Class Codes: F16K 31/50 with screw-spindle or internally threaded actuating means
• CPC Class Codes: F16K 31/506 with plural sets of thread, e.g. with different pitch

Abstract

The valve bonnet assembly (1) includes a bonnet stem and a valve member supported on the stem. Rotation of the stem (16) axially moves the valve member (12) along the stem axis into and out of sealing engagement with a seat (11). The bonnet stem includes multiple start threads, and the thread pitch divided by a number of starting threads is greater than or equal to 6 and less than or equal to 9.

Claims

1. A valve bonnet assembly including an operating valve bonnet stem, rotation of the stem axially moving a valve member supported on the stem along a stem axis and into and out of sealing engagement with a seat, the bonnet stem including a multiple start thread wherein the thread pitch divided by the number of starting threads is greater than or equal to six and less than or equal to ten.

2. A valve bonnet assembly as defined in claim 1, wherein the seat is a nonmetallic seat for sealing with the valve member.

3. A valve bonnet assembly as defined in claim 2, wherein the seat has a conical outer surface.

4. A valve bonnet assembly as defined in claim 1, wherein two or more valve bonnet assemblies are each mounted on a manifold with pressure line spacing between the bonnet assemblies being from 2.0 to 2.250 inches.

5. A valve bonnet assembly as defined in claim 1, wherein the thread pitch on the bonnet stem divided by the number of starting threads is greater than or equal to six and less than or equal to nine.

6. A valve bonnet assembly for use on a manifold for supporting two or more operating valves, a pressure line spacing between the two valves from 2.0 to 2.250 inches, and the bonnet stem utilizing three or more starting threads, wherein a thread pitch divided by the number of starting threads is greater than or equal to six and less than or equal to ten.

7. A valve bonnet assembly as defined in claim 6, wherein the seat is a nonmetallic seat for sealing with the valve member.

8. A valve bonnet assembly as defined in claim 7, wherein the seat has a conical outer surface.

9. A valve bonnet assembly as defined in claim 6, wherein the thread pitch on the bonnet stem divided by the number of starting threads is greater than or equal to six and less than or equal to nine.

10. A valve including a body having a seat and an operating valve bonnet stem, rotation of the stem axially moving a valve member supported on the stem along a stem axis and into and out of sealing engagement with the seat, the bonnet stem including a multiple start thread wherein the thread pitch divided by the number of starting threads is greater than or equal to six and less than or equal to ten.

11. A valve as defined in claim 10, wherein the body includes a manifold and two or more valve bonnet assemblies are each mounted on the manifold with pressure line spacing between the bonnet assemblies being from 2.0 to 2.250 inches.

12. A valve as defined in claim 10, wherein the seat is a nonmetallic seat for sealing with the valve member.

13. A valve as defined in claim 12, wherein the seat has a conical outer surface.

14. A valve as defined in claim 10, wherein the thread pitch on the bonnet stem divided by the number of starting threads is greater than or equal to six and less than or equal to nine.