Automated Coker Valve
Interlock Systems

Presentation and panel discussion at the Coking Conference in Galveston, TX, on May 2, 2012

1. A brief review of XOM's history in developing improved valve operations integrity. Discussion of alternate systems and procedures to reduce risk of incorrect valve line-ups.
• LOTO programs, guiding light, trapped key
• Cost trends on such systems and how that affects their justification vs alternatives
2. ExxonMobil's Motor-Actuated design with PLC oversight
• Systems on 6 cokers, with 7th in progress
• Review of motor actuator types and how they play into reliability of overall system
• Review of design defect in some actuators that can cause unwanted valve movement
• Review of past incidents at three refineries that caused unwanted valve movements due to not interlocking out power to valves
3. Review of the maintenance responsibilities associated with interlock systems
4. Review of operations responsibilities
• Review of automatic monitoring systems to maintain integrity

Additional refiners shown here have already signed up to share their experiences with valve interlocks and automation.

A breakout discussion group on Wednesday afternoon will focus on motor actuated valves, valve line-ups, Lock Out - Tag Out and automation.

Exhibitors will be displaying their valves and controls.

Call For Participation

The Coker Community thrives on participation. Imagine if cokers around the world shared their experiences with motor actuation and valve interlocks. How many incidents could have been prevented from those learnings and sharings? How much longer could we have kept the equipment running? It's up to you!

Join the refiners listed here. Explain issues you've had so we can avoid them. Describe procedures or new technologies that have made a difference for you.

Contact us now to reserve your 5 to 10 minutes during this presentation.

Broom handle holding the bypass switch in open position.

"The seminar was excellent. The breakout sessions and hall meetings were extremely useful. The [shop] tour was great." - Marsulex