Valve bonnet assembly

Patent metadata

Field	Value
Publication number	US-9328843-B2
Application number	US-87644010-A
Country	US
Kind code	B2
Filing date	Sep 7, 2010
Priority date	Sep 18, 2009
Publication date	May 3, 2016
Grant date	May 3, 2016

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.

First claim

What is claimed is:

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 as defined in claim 1 , wherein the valve stem has a stem diameter less than or equal to 7/16 inch.

7. 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.

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

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

10. A valve bonnet assembly as defined in claim 7 , 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.

11. 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.

12. A valve as defined in claim 11 , 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.

13. A valve as defined in claim 11 , wherein the seat is a nonmetallic seat for sealing with the valve member.

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

15. A valve as defined in claim 11 , 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.

16. A valve bonnet as defined in claim 11 , wherein the valve stem has a stem diameter less than or equal to 7/16 inch.

Assignees

• Nimberger Spencer M
• Parker Hannifin Corp

Inventors

• Nimberger Spencer M

Classifications

• F16K31/50

  with screw-spindle {or internally threaded actuating means} · CPC title

• F16K31/506 Primary

  with plural sets of thread, e.g. with different pitch · CPC title

• F16K1/422

  attachable by a threaded connection to the housing · CPC title

• F16K1/04

  with a cut-off member rigid with the spindle, e.g. main valves · CPC title

• F16K1/385

  contacting in the closed position, over a substantial axial length, a seat surface having the same inclination · CPC title