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Heater Feed Flow Hunting

Home Forums Coking Technical Heaters & Furnaces Heater Feed Flow Hunting

This topic contains 3 replies, has 3 voices, and was last updated by  Anonymous 13 years, 4 months ago.

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  • #4401

    Anonymous

    From: lswoilbank.co.kr
    Category: Safety
    Date: 05 Jan 2004

    Comments
    Heater feed flow hunting problem is critical to us since it has been repeating in each pass. It could be assumed that the cause of flow hunting may be valve itself problem because the flow is not proportional to the valve opening position and hunting even in the manual position. For reference, we are using angle valve for heater feed control and the strainer hole size are as following. -Cylindrical strainer of fractionator : slot 10ea (each slot size : w305mm x L 305 – Recirculation strainer : ‘10 mm – Charge pump suction strainer : 20 mm.

    I would like to hear any advice to solve the problem.

    Copied from previous discussion forum

  • #7884

    Anonymous

    From: fares
    Category: Other
    Date: 17 Jan 2004

    Comments
    You have to keep all pass flow on manual if it still hunting check vel.steam and keep it on manual if the flow still hunting , increase charge pump discharge pressure ,may be low

    Copied from previous discussion forum

  • #7290

    coked
    Participant

    Have you checked if the opening hunting as well? i would get the transmitter calibrated and if the opening is hunting as well, you might want to get them serviced. 

  • #6795

    Anonymous

    We were also facing hunting of the pass flow meters…. We used to check the emergency steam line up to the VR inlet line…If emergency steam control valve is passing, it is suspected that it can cause hunting in pass flow meters… We tried isolating the emergency steam final iso valve and found satisfactory results

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