Separately replaceable seal systems for use with a pressure transmitter

Patent metadata

Field	Value
Publication number	US-9568136-B2
Application number	US-201313804979-A
Country	US
Kind code	B2
Filing date	Mar 14, 2013
Priority date	Mar 14, 2013
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

A replaceable seal system with high and low sides connectable to a coplanar inlet plate on a pressure transmitter. A first side of the seal system can be replaced without disturbing the sealing of a second side of the seal system. The seal system includes a stack of first and second plates with a central split line. At least one of the first and second plates is split along the central split line to provide for separate replacement on only one side of the system.

First claim

What is claimed is:

1. A seal system, couplable to a coplanar inlet plate of a pressure transmitter, the coplanar inlet plate including high and low side diaphragms and coplanar inlet plate bolt holes, the seal system comprising:
a first plate assembly that includes first plate assembly bolt holes, at least some of which are alignable with the coplanar inlet plate bolt holes, and first high and low side isolator fluid passages that are alignable with the high and low side diaphragms;
a second plate assembly that is stacked vertically on the first plate assembly to form a plate stack that includes the first and second plate assemblies, the second plate assembly including second plate assembly bolt holes aligned with first plate assembly bolt holes;
high and low side capillary connectors connected to the plate stack, the high and low side capillary connectors having second high and low side isolator fluid passages that are aligned with the first high and low side isolator fluid passages;
capillaries connected to the high and low side capillary connectors;
seals that connect to the capillaries; and
wherein the first plate assembly is split into a high side plate assembly including the first high side isolator fluid passage, and a low side plate assembly including the first low side isolator fluid passage, the high and low side plate assemblies being separately removable from the first plate assembly.

2. The seal system of claim 1 , wherein the separability of high and low side plate assemblies enables separate replacement of a selected one of the first high and low side isolator fluid passages, while avoiding replacement of a non-selected one of the first high and low side isolator fluid passages.

3. The seal system of claim 1 , wherein the seal system comprises high and low side bolts and the separate replacement of the high side plate assembly comprises temporary removal of at least some of the high side bolts.

4. The seal system of claim 1 , wherein the alignment of the first and second low side isolator fluid passages is undisturbed during replacement of the high side plate assembly.

5. The seal system of claim 1 wherein the capillary connector includes a process fill tube.

6. The seal system of claim 1 wherein the first plate assembly bolt holes comprise a rectangular pattern of four bolt holes with bolt hole spacings that is less than 1.7 inches by 2.2 inches.

7. The seal system of claim 1 and further comprising the pressure transmitter.

8. A seal system that is couplable to a coplanar inlet plate of a pressure transmitter, the coplanar inlet plate including high and low side diaphragms and coplanar inlet plate bolt holes, the seal system comprising:
a first plate assembly including first plate assembly bolt holes, which are alignable with the coplanar inlet plate bolt holes, and first high and low side isolator fluid passages that are alignable with the high and low side diaphragms;
a second plate assembly stacked vertically on the first plate assembly and including second plate assembly bolt holes aligned with first plate assembly bolt holes;
high and low side capillary connectors that are connected to the first plate assembly, each of the high and low side capillary connectors including second high and low side isolator fluid passages that are aligned with the first high and low side isolator fluid passages;
high and low side capillariess that connect to the high and low side capillary connectors;
high and low side seals that connect to the high and low side capillaries; and
wherein the first plate assembly is split into a high side plate assembly including the first high side isolator fluid passage, and a low side plate assembly including the first low side isolator fluid passage, the high and low side plate assemblies being separately removable from the first plate assembly.

9. The seal system of claim 8 , wherein the separability of high and low side plate assemblies enables separate replacement of a selected one of the first high and low side isolator fluid passages, while avoiding replacement of a non-selected one of the first high and low side isolator fluid passages.

10. The seal system of claim 8 , wherein the seal system comprises high and low side bolts and the separate replacement of the high side plate assembly comprises temporary removal of at least some of the high side bolts.

11. The seal system of claim 8 wherein the alignment of the first and second low side isolator fluid passages is undisturbed during replacement of the high side plate assembly.

12. The seal system of claim 8 wherein the capillary connectors include process fill tubes.

13. The seal system of claim 8 wherein the second plate assembly includes high and low side openings that expose contact areas of the first plate assembly.

14. The seal system of claim 8 and further comprising the pressure transmitter.

15. A seal system, couplable to a coplanar inlet plate including high and low side diaphragms and coplanar inlet plate bolt holes, the seal system comprising:
a first plate assembly including first plate assembly bolt holes, at least some of which are alignable with the coplanar inlet plate bolt holes, and first high and low side isolator fluid passages that are alignable with the high and low side diaphragms;
a second plate assembly stacked vertically on the first plate assembly and including second plate assembly bolt holes aligned with first plate assembly bolt holes;
high and low side capillary connectors connected to the second plate assembly, the high and low side capillary connectors including second high and low side isolator fluid passages aligned with the first high and low side isolator fluid passages;
high and low side capillaries connected to the high and low side capillary connectors;
high and low side seals connected to the high and low side capillaries; and
wherein the second plate assembly is split into a high side plate assembly including at least one of the second plate assembly bolt holes, and a low side plate assembly including at least one of the second plate assembly bolt holes, the high and low side plate assemblies being separately removable from the second plate assembly.

16. The seal system of claim 15 , wherein the separability of the high and low side plate assemblies enables separate replacement of a selected one of the high and low side plate assemblies, while avoiding replacement of a non-selected one of the high and low side plate assemblies.

17. The seal system of claim 15 , wherein the seal system comprises high and low side bolts and the separate replacement of the high side plate assembly comprises temporary removal of at least one of the high side bolts.

18. The seal system of claim 15 , wherein the alignment of the first and second low side isolator fluid passages is undisturbed during replacement of the high side plate assembly.

19. The seal system of claim 15 wherein the capillary connectors include process fill tubes.

20. The seal system of claim 15 comprising a first pattern of four bolts that attach the first plate assembly to the inlet plate, and a second pattern of four bolts that attach the second plate assembly to the first plate assembly.

21. The seal system of claim 15 and further comprising the pressure transmitter.

Assignees

• Rosemount Inc
• Rosemount Inc

Inventors

• Fadell Paul
• Yang Liu

Classifications

• F16L39/00 Primary

  Joints or fittings for double-walled or multi-channel pipes or pipe assemblies {(quick-acting joints for double-walled or multi-channel pipes or pipe assemblies F16L37/56)} · CPC title

• G01L19/003 Primary

  using a detachable interface or adapter between the process medium and the pressure gauge · CPC title