Top Unheading Valves


Coke Drum Top Unheading Valve

The DeltaValve coke drum top unheading valve permanently connects to the top flange of the coke drum. With this device, top drum unheading can now be safely accomplished with the push of a single button from a remote location, removing operators from the cutting deck and protecting them from potential coke drum eruptions and top head blow-outs.

Key Advantages
  • Proven technology
  • Fully automated
  • Part of a totally enclosed system
  • Low maintenance
  • Steam purged
  • Single button operation
  • Quick, safe unheading
Physical/Technical Attributes

Top Unheading Valve

DesignPer ASME section VIII Div.1
MetallurgyASME SA387 Gr5 (optional Gr22)
Dimensions - 30"252”L x 59”W x 22”H
16.2” face to face
ActuationHydraulic or electric
Interlocks / Controls / HPUEngineered to plant specifications
Positive LockoutRemovable lock-out pin
MountingDirect bolt to drum top flange
Purge MediaSteam
Valve Size30 and 36 inch
Temperature RatingSeats/Gate (process): 900oF (482oC)
Body (steam): 450oF (232oC)
MAWP temperature/pressure curves available
Pressure Rating105 psig (723.4 kPa) @ 900oF (482oC)


Application Photos