Bottom Unheading Valves
Coke Drum Bottom Unheading Valve
DeltaValve’s bottom unheading valve permanently connects to the coke drum, creating a totally enclosed system from the coke drum to the discharge pit. Utilizing patented dynamic seat technology, the device is tight-sealing, robust, and highly reliable. With the push of a single button from a remote location, safe and reliable unheading can be achieved. The valve is inherently safe, easy to operate, and designed to be maintenance free between turnarounds.
Key Advantages
- Proven technology
- Safe and reliable
- Low maintenance
- Part of a totally enclosed system
- Double block and purge
- Steam purged
- Single button operation
Bottom Unheading Valve Physical/Technical Attributes
| Design | Per ASME section VIII Div.1,2 |
|---|---|
| Construction | Valve body: cast Bonnets: cast or fabricated |
| Metallurgy | Valve body: ASME SA217 Gr. C5 Bonnets: ASME SA387 Gr22 (fabricated) Bonnets: ASME SA217 GrWC9 (cast) |
| Dimensions | 357”L x 98”W x 40” H 21.6” face to face |
| Weight | 66,000 – 74,000 (depending on actuator) |
| Actuation | Single-ram hydraulics Auxiliary hydraulic override Electronic planetary roller screw |
| Interlocks / Controls / HPU | Engineered to plant specifications |
| Positive Lockout | Removable lock-out pin |
| Transition Spool | Engineered to plant specifications |
| Discharge Chute | Engineered to plant specifications |
| Purge Media | Steam |
| Drum Flange | 60 inch (1524 mm) standard |
| Shut-off | Double block and purge with 100% verifiable positive isolation |
| Pressure Rating | 154 psig (10.8kgf/cm2g) @ 940oF (505oC) |
