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Pressure Relief Devices Om Pratap Singh
Why Pressure relieving Devices ? ,[object Object],[object Object],[object Object],[object Object],[object Object]
Standards for design and Installation   ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Positive Pressure relieving devices ,[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object]
Definition of Pressure Relief Terms ,[object Object],[object Object],[object Object],[object Object],[object Object]
Pressure Relief Valve Operation for Gases & Vapors
Pressure Relief Valve Operation for Liquids
General Code Requirements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Rupture Disk ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Combined PRV & RD
Effect of Back pressure on PRV Operation & Flow capacity ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Conventional Pressure Relief Valve
Balanced-Bellows pressure Relief Valve
PRV Sizing for Critical Flow ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Kc = Combination correction factor for installation with a RD upstream of the PRV. = 1 when a RD is not installed. = 0.9 when a RD is installed in combination with a PRV. T  = Relieving temp. of the gas or vapor, R, (K) Z  = Compressibility factor at inlet relieving condition M = Mol. Wt.
PRV Sizing for Sub critical Flow: ,[object Object],[object Object],[object Object],[object Object],[object Object]
 
Sizing for Steam Relief ,[object Object],[object Object]
Sizing for Liquid Relief
Sizing for External Fire Condition ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Emergency Relief Valve
Breather Valve ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Breather Valve
Thank You
Thank you

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Pressure Reliveing Devices1