Bursting disc assembly
AssigneeElfab Corporation
InventorsGraeme Melrose, Russell Trotter
Life of this patent
Estimating the term…
Abstract
The bursting disc assembly has a primary bursting disc (10) and a secondary bursting disc (20) immediately behind and supporting the primary bursting disc. Each of the said discs (10,20) is made of metal and is gas impermeable, and the bursting strength of the assembly is derived from both of the bursting discs acting in combination. The primary and secondary bursting discs are in contact over the whole of the operating area of the disc, and are shaped together as a pair. The materials of the two discs can be chosen suitably for their functions. The primary disc is for example corrosion-resistant.
Claims21
A bursting disc assembly having:
- a primary bursting disc, and
- a secondary bursting disc immediately behind and supporting said primary bursting disc,
- wherein each of the said bursting discs is made of metal, is gas impermeable and has a rupture line, the rupture line of the primary bursting disc being axially aligned with the rupture line of the second bursting disc,
- and wherein the bursting strength of the assembly is derived from both of the bursting discs acting in combination.
Apparatus containing corrosive fluid and having a bursting disc assembly,
- said bursting disc assembly having:
- a primary bursting disc, and
- a secondary bursting disc immediately behind and supporting said primary bursting disc,
- wherein each of the said bursting discs is made of metal, is gas impermeable and has a rupture line, the rupture line of the primary bursting disc being axially aligned with the rupture line of the secondary bursting disc,
- and wherein the bursting strength of the bursting disc assembly is derived from both of said bursting discs acting in combination, wherein said apparatus, the primary bursting disc contacts corrosive fluid and wherein the primary bursting disc is resistant to said fluid.
An over pressure detector comprising a bursting disc assembly having:
- a primary bursting disc, and
- a secondary bursting disc immediately behind and supporting said primary bursting disc,
- wherein each of the said bursting discs is made of metal, is gas impermeable and has a rupture line, the rupture line of the primary bursting disc being axially aligned with the rupture line of the secondary bursting disc,
- and wherein the bursting strength of the assembly is derived from both of the bursting discs acting in combination,
- whereby failure of the bursting disc assembly is detected as an indication of over pressure.
A method of making a bursting disc assembly having:
- a primary bursting disc, and
- a secondary bursting disc immediately behind and supporting said primary bursting disc,
- wherein each of the said bursting discs is made of metal, is gas impermeable and has a rupture line, the rupture line of the primary bursting disc being axially aligned with the rupture line of the secondary bursting disc,
- and wherein the bursting strength of the assembly is derived from both of the bursting discs acting in combination,
- the method comprising the step of :
- shaping the primary and secondary discs together as a pair.
Dependencies are inferred from the claim text.