4 replies to this topic

[kpa]

Dear allI came across many of the systems having rupture disc in the upstream of safety valve.Could anybody please explain me the purpose of rupture disc on the downstream of pressure safety valve. When this combination to be used? and if at all to use this then what will be the set pressure of the disc downstream?Thank you for reviewing.Regards Pradip

[gvdlans]

Please check Phil Leckners excellent series on rupture disks: http://www.cheresour...asiseeit3.shtml
http://www.cheresour...asiseeit7.shtml

[pleckner]

Thanks for that plug "gvdlans".

A rupture disk might be used downstream of a relief valve if you are concerned about vapors (or liquid for that mater) backing up into the tail pipe and affecting the integrity of the PSV.

As far as the bursting pressure goes, it can basically be anything that won't adversely affect the PSV. See my articles.

[kpa]

Thank you Mr. gvdlans and Mr. pleckner for reviewing and replying for my querry. I am going through your articles on the rupture disc and finding it very useful.

Regards
kpa



uote name='pleckner' date='May 16 2006, 12:05 PM' post='6524']
Thanks for that plug "gvdlans".

A rupture disk might be used downstream of a relief valve if you are concerned about vapors (or liquid for that mater) backing up into the tail pipe and affecting the integrity of the PSV.

As far as the bursting pressure goes, it can basically be anything that won't adversely affect the PSV. See my articles.
[/quote]

Dear allI came across many of the systems having rupture disc in the upstream of safety valve.Could anybody please explain me the purpose of rupture disc on the downstream of pressure safety valve. When this combination to be used? and if at all to use this then what will be the set pressure of the disc downstream?Thank you for reviewing.Regards Pradip

Hi Pradip
 bursting disc and PRV best practices.pdf   158.25KB   126 downloads  bursting disc and PRV best practices.pdf   158.25KB   126 downloadsThe selection of using rupture discs on the downstream side of safety valves may offer several benefits such as avoidance of corrosion originating from product residue entering from a common header or avoiding that excessive back pressure is generated forcing the use of balanced bellows safet valves. A good descriptin of the issues related to this and other use of rupture discs (bursting discs) can be found at www.fike.com or in the attached technical document.
Let me know if this helps.

Roger