DeltaGuard® GV815, GV820 – Bottom Unheading Device


The DeltaGuard unheading device permanently connects to the bottom of a coke-drum, creating a totally enclosed system from the top of the coke-drum to the discharge pit. With the push of a single button from a remote location, safe and reliable unheading can be achieved. The DeltaGuard is inherently safe, easy to operate, and designed to be maintenance free from turnaround to turnaround.

DeltaGuard GV815 - Technical Specifications

Design Per ASME section VIII Div.1
Construction Main body:cast
Bonnets:fabricated
Metallurgy Main body:ASME SA217 Gr5
Bonnets:ASME SA387 Gr22
Dimensions L 339"x W 94"x H 40" stiffener to stiffener
L 339"x W 94"x H 20 3/16" face to face
Weight 75,000 lbs.(approx.)
Actuation Single ram hydraulic
Auxiliary hydraulic override
Interlocks/Controls/HPU Engineered to plant specifications
Positive Lockout Removable shear pin
Transition Spool Engineered to plant specifications
Discharge Chute Engineered to plant specifications
Purge Media Steam
Function GV815:Drainable
GV820:Throttling
Drum Flange 60" (1524mm) Standard
54" to 60" (1372mm to 1524mm)
Shut-off Double block and purge with
100% verifiable positive isolation
Maximum Allowable
Design Pressure		 940°F (505°C