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Heater Charge Pump Isolation Valves

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This topic contains 4 replies, has 5 voices, and was last updated by  coker squirrel 13 years, 5 months ago.

  • Author
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  • #4388

    John Parks
    Participant

    We currently have steam purged ball valves for isolating the heater charge pumps. The problem is that sometimes the discharge pressure is too high and we get resid into our steam system. We are looking at a variety of options. One option is to find a valve that does not require a steam purge. Are people using valves without steam purges for this service?

    Thanks

  • #7865

    coker squirrel
    Participant

    We use regular gate valves without steam purge for the Heater Charge pump isolation.

  • #7853

    RAJEEV NARAYAN
    Participant

    We too do not have steam purge on Charge pump isolation valves. I do not think that is required. With regard to you HC backing up problem, don’t you have a NRV in the steam purge line?

  • #7324

    Neelabh Sharma
    Participant

    Yup ..Same here..simple Gate valves in both the suction & discharge line of Charge Pump…working well…for past many years…never faced any problems…

  • #7269

    Mrityunjay Singh
    Participant

    Why steam purge type of isolation valves are required for the heater charge pump? What is the operating temperature of your pump? In normal cases the charge pumps are operated in the range of  300 to 370 deg C, which is not the coking temperature of the feed. We are using normal gate valves for isolation of our charge pump in our units since last several years without any problem.

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