The final stage in the production process is downstream, where the oil and natural gas are processed and refined into usable products. ZOOK offers a complete solution for all downstream production processes.
In refineries and petrochemical plants, a variety of pressure relief devices are required including:

  • Towers
  • Knock out drums
  • Heat exchangers
  • Separators

  • Accumulators
  • Flare stacks
  • Sulphur recovery units
  • Pressure relief valves
  • Storage tanks/batteries

Pressure Relief Valve Isolation

The primary reasons for applying rupture disks downstream of pressure relief valves are:
  • Prevent corrosion of relief valve
  • Reduce cost of relief valve by negating costly special alloy trim/internals
  • Prevent fouling or sticking of the relief valve
  • Prevent variable superimposed backpressure from affecting relief valve
  • Detect opening or leakage of relief valve
  • Elimination SRV emissions -valve isolation


Storage is another component of downstream operations. Rupture disks are utilized on the storage tanks.


There are many other pressure relief applications we provide to the Power & Energy Industry. Please contact ZOOK for applications not listed.
Recommended Products Heat Exchangers Flare Stacks Storage Tanks Knock-Out Drums Accumulators
Reverse Acting Disks RA4 RA6 RA8 RAX
Forward Acting Disks ARD D FAX FDZ PB
Custom Welded Assemblies (CWA)
Graphite Disks Mono Duplex FS Inverted
Ultra-Low Bi-Directional Disks Z-VAC/Z-POS
Screw Type Holders
Union Type Holders
Burst Sensors & Indicators

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Oil & Gas


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