Diaphragm valve with diaphragm seat carrier

Patent metadata

Field	Value
Publication number	US-10315939-B2
Application number	US-201715455384-A
Country	US
Kind code	B2
Filing date	Mar 10, 2017
Priority date	Feb 1, 2013
Publication date	Jun 11, 2019
Grant date	Jun 11, 2019

Abstract

A diaphragm valve includes a valve body, a valve assembly disposed to seal the valve cavity and including a diaphragm and a valve seat retained with a seat carrier, a threaded member assembled with the valve body, and a valve actuator assembled with the valve body and operable to move a surface of the diaphragm into and out of contact with the valve seat. The valve body includes a valve cavity, a first port and a second port, with the first port and the second port being open to the valve cavity. The threaded member includes an annular bead that directly contacts the diaphragm to apply a compressive load to the diaphragm against a first side of the seat carrier. The valve actuator is separate from the threaded member, and is removable from the valve body without removing the threaded member from the valve body.

First claim

I claim:

1. A diaphragm valve, comprising:
a valve body comprising a valve cavity, a first port and a second port, said first port and said second port being open to said valve cavity;
a valve assembly disposed to seal said valve cavity, said valve assembly comprising a valve seat, a seat carrier and a diaphragm comprising a domed disk, said valve seat being retained with said seat carrier and being disposed to surround said first port;
a threaded member assembled with the valve body and including an annular bead that directly contacts an outer periphery of the domed disk to apply a compressive load to said diaphragm against a first side of said seat carrier; and
a valve actuator that is assembled with the valve body and operable to move a surface of said diaphragm into and out of contact with said valve seat, wherein the valve actuator is separate from the threaded member, and wherein the valve actuator is removable from the valve body without removing the threaded member from the valve body.

2. The diaphragm valve of claim 1 , wherein the valve actuator is secured to the valve body by the threaded member.

3. The diaphragm valve of claim 1 , wherein the threaded member comprises an interior threaded portion.

4. The diaphragm valve of claim 1 wherein the valve actuator is threadably assembled with the interior threaded portion of the threaded member.

5. The diaphragm valve of claim 1 , wherein the diaphragm is attached to the first side of the seat carrier.

6. The diaphragm valve of claim 1 , wherein the diaphragm is welded to the first side of the seat carrier.

7. The diaphragm valve of claim 1 wherein said seat carrier comprises an annular body having an outer rim and a web that extends radially inward from said outer rim to a central opening, said central opening being aligned with said first port when said valve assembly is installed in said valve body.

8. The diaphragm valve of claim 7 wherein said web comprises a plurality of flow passages separated by lands about said central opening.

9. The diaphragm valve of claim 8 wherein each said land between adjacent pairs of said flow passages has a surface area that is less than a cross-sectional area of said second port so as to reduce obstruction of flow when said land overlays said second port.

10. The diaphragm valve of claim 7 wherein said valve seat is retained with said seat carrier by an interference fit between a circumferential wall of said valve seat and a wall of said web that defines said central opening.

11. The diaphragm valve of claim 7 wherein said web is flexible so that said web biases a surface of said valve seat that faces away from said diaphragm into contact with a seal surface of said valve body that surrounds said first port.

12. The diaphragm valve of claim 7 wherein said web is generally planar and has a spring rate of less than 100,000 lbs/in.

13. The diaphragm valve of claim 7 , wherein the web applies a load between approximately 50 pounds and 100 pounds between the valve seat and the seal surface.

14. The diaphragm valve of claim 1 wherein said diaphragm comprises a domed circular disk that is attached to said seat carrier by a weld about a periphery of said domed circular disk, said diaphragm being compressed between said annular bead of said threaded member and a surface on said first side of said seat carrier.

15. The diaphragm valve of claim 1 wherein said second port is provided in a surface of said valve body that defines said valve cavity, said seat carrier comprises an annular body having an outer rim and a web that extends radially inward from said outer rim to a central opening, said web being disposed to provide a gap between a lower surface of said web and said surface of said valve body.

16. The diaphragm valve of claim 15 wherein said gap presents a flow area that is approximately the same or greater than a flow area of said second port.

17. The diaphragm valve of claim 1 wherein said diaphragm comprises stainless steel, said seat carrier comprises stainless steel, and said valve seat comprises a polymer or plastic.

18. The diaphragm valve of claim 1 wherein said valve seat comprises a flow passage in fluid communication with said first port.

19. The diaphragm valve of claim 1 , wherein the valve actuator is removable from the valve body without reducing the compressive load applied to said diaphragm by the threaded member.

20. A diaphragm valve, comprising:
a valve body comprising a valve cavity, a first port and a second port, said first port and said second port being open to said valve cavity;
a valve assembly disposed to seal said valve cavity, said valve assembly comprising a valve seat, a seat carrier and a diaphragm, said valve seat being retained with said seat carrier and being disposed to surround said first port;
a valve actuator that is assembled with the valve body and including an actuator stem operable to move a surface of said diaphragm into and out of contact with said valve seat; and
a threaded member having an external threaded portion threadingly assembled with the valve body and an aperture through which the actuator stem extends, the aperture including an internal threaded portion threadingly assembled with the valve actuator, the threaded member including an annular bead that directly contacts the diaphragm to apply a compressive load to said diaphragm against a first side of said seat carrier;
wherein the valve actuator is removable from the valve body without reducing the compressive load applied to said diaphragm by the threaded member.

21. The diaphragm valve of claim 20 , wherein the diaphragm comprises a domed circular disk, wherein the annular bead of the threaded member directly contacts an outer periphery of the domed circular disk.

Assignees

• Swagelok Co

Inventors

• Glime William H

Classifications

• C02F1/441

  by reverse osmosis · CPC title

• C02F1/722 Primary

  Oxidation by peroxides · CPC title

• C02F2103/346

  from semiconductor processing, e.g. waste water from polishing of wafers · CPC title

• C02F1/20

  by degassing, i.e. liberation of dissolved gases (degasification of liquids in general B01D19/00; arrangement of degassing apparatus in boiler feed supply F22D) · CPC title

• C02F2103/04

  for obtaining ultra-pure water · CPC title