DeltaGuard® GV830 – Top Unheading Device


The DeltaGuard GV830 unheading device is the latest innovation in coke drum top unheading. Mounted directly to the drum, the GV830 creates a permanent top head connection. Utilizing patented dynamic seat technology, the device is tight-sealing, robust, and highly reliable. Use of this device for remote unheading allows a safer, more efficient method of coke drum top unheading.

DeltaGuard® GV830 - Technical Specifications

Design Per ASME section VIII Div.1
Construction Fabricated
Metallurgy ASME SA387 Gr5
(optional Gr22)
Dimensions - 36" L 193 "x W 64"x H 28 " stiffener to stiffener
L 193 "x W 64"x H 13 7/8 " face to face
Dimensions - 30" L 158 "x W 53 "x H 22 " stiffener to stiffener
L 158 "x W 53 "x H 10 5/8 " face to face
Weight - 36" 12,000 lbs.(approx.)
Weight - 30" 6,500 lbs. (approx.)  
Actuation Hydraulic or electric
Interlocks/Controls/HPU Engineered to plant specifications
Positive Lockout Removable shear pin
Mounting Direct bolt to drum top flange
Purge Media 300# steam
Function Open / Close
Valve Size 30" & 36"
Temperature Rating Seats / Gate (process):900°F (482°C)
Body (steam):450°F (232°C)
MAWP temperature/pressure curves available
Pressure Rating Seats/Gates:125 psi
Body:145 psi