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FOCUS ON DELAYED COKER APPLICATIONS
Velan maintains a group that has handled delayedcoker applications exclusively for over 20 years. The group’s design and service staff maintain
contact with end users regularly appraising valve
performance in the field. Our approach has yielded
several design improvements over the years based
on evolving coker operating trends.
EXAMPLES:
Fully automated, fully interlocked valve operation for a safer drum switch and unheading. Total remote operation capability of switch andisolation valves including logic or hardware features to avoid unwanted operation. Simple,Reliable Automation. Process Debottlenecking. Full bore valves for higher throughput and a lower
pressure drop in the overhead lines. This results in a
lower drum pressure, which in turn translates into
higher liquid yields and enhanced coker profitability. In fact, the requirement for lower drum pressuresresulted in a new, patented backpressure control
valve design called the Ring Valve. Shorter Cycles. Valves are better suited to perform under the
operating conditions imposed by shorter cycle times such as: ❏ The 12" Velan Switch Valve shown above has been in
uninterrupted service for 7 years. This Valve was
installed as part of a Valve automation Project. These 24" full bore overhead vapor valves havebeen in uninterrupted service for over 6 years. In an effort to maximize liquid yield Delayed Cokers
worldwide are opting for larger overhead lines. In fact some of the newer DCU’s have already
installed our 30" valves for overhead and blowdown
service.
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Increased thermal stresses due to shorter quench times. ❏
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Water hammer in part due to higher quench rates. Special Applications. Needle coke type applications where operating
conditions provide new challenges. In-Line cleaning capability. Valves can be decoked without removal from the line.
Learn more about Velan Coker Ball Valves,or any of Velan’s complete range of industrial steel valves at www.velan.com.
Printed in Canada VEL-CBV-2006
