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Top and Bottom Unheading Devices

Home Forums Coking Operations Cutting, Drilling, Unheading Unheading Top and Bottom Unheading Devices

This topic contains 1 reply, has 2 voices, and was last updated by  Claus Graf 10 years, 7 months ago.

  • Author
  • #1852

    Freddy Martinez

    I’d like to get a perspective on reliability strategies around Top and Bottom Unheading Devices, specifically Delta Valves. What strategies are employed to ensure long term reliability of the valves (tasks, inspection, overhauls, etc) and at what intervals?

  • #4618

    Claus Graf


    Two things to keep your Delta Valves working properly: steam supply & hydraulic fluid cleanliness.

    Monitoring your steam supply to the bonnets will provide indication of the gate and seats condition.

    The hydraulic fluid and the HPU require filter changes (typ.) every four to six months.

    The valves can be serviced at the turnaround replacing the seats and gates.


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