Valve including multilayer wear plate

Patent metadata

Field	Value
Publication number	US-9470328-B2
Application number	US-201514949388-A
Country	US
Kind code	B2
Filing date	Nov 23, 2015
Priority date	Apr 24, 2013
Publication date	Oct 18, 2016
Grant date	Oct 18, 2016

Abstract

A valve is provided and includes a component including a surface and a wear plate including a surface disposed in sliding engagement with the surface of the component. The surface of the wear plate includes a corrosion resistant substrate, a secondary layer disposed on a surface of the corrosion resistant substrate, a noble metal layer disposed on a surface of the secondary layer and a tertiary layer disposed on a surface of the noble metal layer.

First claim

The invention claimed is:

1. A valve, comprising:
a component including a surface; and
a wear plate including a surface disposed in sliding engagement with the surface of the component, the surface of the wear plate comprising:
a corrosion resistant substrate;
a secondary layer disposed on a surface of the corrosion resistant substrate;
a noble metal layer disposed on a surface of the secondary layer; and
a tertiary layer disposed on a surface of the noble metal layer, wherein the tertiary layer comprises silver.

2. The valve according to claim 1 , wherein the corrosion resistant substrate comprises steel.

3. The valve according to claim 1 , wherein the secondary layer comprises nickel, copper or a combination thereof.

4. The valve according to claim 1 , wherein the noble metal layer comprises at least one or more of gold, platinum, palladium and rhodium.

5. The valve according to claim 1 , wherein the noble metal layer is about 0.7 μm to about 1.3 μm thick.

6. The valve according to claim 1 , wherein the tertiary layer is about 0.25 μm to about 250 μm thick.

7. The valve according to claim 1 , further comprising a strike layer interposed between the noble metal layer and the tertiary layer.

8. The valve according to claim 1 , wherein the strike layer comprises a silver layer that is about 0.1 μm to about 2.5 μm thick.

9. A wear plate of a valve including a component, the wear plate comprising:
a surface disposed in sliding engagement with a surface of the component, the surface of the wear plate comprising:
a substrate including corrosion resistant steel;
a secondary layer disposed on a surface of the substrate;
a noble metal layer disposed on a surface of the secondary layer; and
a tertiary layer disposed on a surface of the noble metal layer, wherein the tertiary layer comprises silver.

10. The valve according to claim 9 , wherein the noble metal layer comprises at least one or more of gold, platinum, palladium, rhodium and combinations thereof.

11. The valve according to claim 9 , wherein the secondary layer is about 0.25 μm to about 25 μm and the noble metal layer is about 0.7 μm to about 1.3 μm thick.

12. The valve according to claim 9 , wherein the tertiary layer is about 0.25 μm to about 250 μm thick.

13. The valve according to claim 9 , further comprising a strike layer interposed between the noble metal layer and the tertiary layer.

14. The valve according to claim 9 , wherein the strike layer comprises a silver layer that is about 0.1 μm to about 2.5 μm thick.

15. A butterfly valve, comprising:
a valve housing formed to define a bore;
a disc and shaft set operably disposed in the bore, the disc and shaft set including a wear plate disposed in abutment with a shim; and
an actuator coupled to the disc and shaft set to thereby cause the disc and shaft set to rotate about a long axis of the shaft such that a surface of the wear plate slidably engages with a flange surface of the shaft, the surface of the wear plate comprising:
a corrosion resistant substrate;
a secondary layer disposed on a surface of the corrosion resistant substrate;
a noble metal layer disposed on a surface of the secondary layer; and
a tertiary layer disposed on a surface of the noble metal layer, wherein the tertiary layer comprises silver.

16. The valve according to claim 15 , wherein the wear plate comprises flanges that extend radially outwardly from an outer diameter of the wear plate at opposite sides thereof.

17. The valve according to claim 15 , wherein the corrosion resistant substrate comprises corrosion resistant steel, the secondary layer is about 0.25 μm to about 25 μm and comprises nickel, the noble metal layer is about 0.7 μm to about 1.3 μm thick and comprises at least one or more of gold, platinum, palladium and rhodium and the tertiary layer is about 0.25 μm to about 250 μm thick.

18. The valve according to claim 15 , further comprising a silver strike layer that is about 0.1 μm to about 2.5 μm thick interposed between the noble metal layer and the tertiary layer.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Smith Blair A
• Rankin Kevin M

Classifications

• F16K1/32

  Details (details of more general applicability F16K25/00 - F16K51/00) · CPC title

• F16K25/005 Primary

  Particular materials for seats or closure elements · CPC title

• F16K1/2268

  Sealing means for the axis of rotation · CPC title

• B32B15/01

  all layers being exclusively metallic {(making layered metal workpieces by pressure cladding B23K20/22; making coatings with a metallic material characterised by its composition C23C30/00)} · CPC title

• F16K1/22 Primary

  with axis of rotation crossing the valve member, e.g. butterfly valves · CPC title