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Fisher V300 ( Vee Ball) vs V500 (eccentric plug) . Which is good option for hydrocarbon liquid flashing service. ?

Working on valve selection for Stabilization system and need to confirm if Fisher V300 can be a good option in place of V500 under moderate liquid flashing conditions (  liquid at saturation point) and low pressure drop ( 10-15 psi). V300 is desired selection owing to wide range ability.

amehta
  • ASHOKAN GIRIDHARAN
    Hi Amehta:

    Thats a good question. Before we address the product selection we need to know the nature of fluid and service. 1st :Your 'liquid' is water or any other hydrocarbon?2nd:Does your process fluid contains any particulates?3rd:What is opening degree range you are getting thru V500 and V300? Generally V500 with reverse flow is best suitable for Flashing service if the opening degree are in controllable range.Looking at the operating dp of 15 psi, V300 also can be applied provided we are clear on above mentioned 3 queries.Let us know,so that we can review and suggest iur recommendations

    Regards,
    Giridharan
  • amehta

    In reply to ASHOKAN GIRIDHARAN:

    Hello Ashokan, Control valve is used for clean hydrocarbon liquid service ( no particulate bigger than 0.5 micron). Process required variability in flow rate (5:1) and since Vee ball had wider control range than e plug ( V500) , the inclination is towards V300.
  • ASHOKAN GIRIDHARAN

    In reply to amehta:

    Hi Amehta:
    Thanks for the details.Since there is no major erosive particles in process fluid you have multiple choices in Fisher product lines for this Flashing service.The best solution would be Globe valve with Flow down construction. However if your process demands more wider rangeability then you can go ahead with V-ball for this 15 psid drop flashing,but make sure you select metal seal (Preferably Alloy6) and hardfaced V-notch area to reduce flashing damage.Hope it helps.

    Thanks

    Giri

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