Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. Renoyd

    PD pump discharge control

    A recent project involves a PD pump pumping liquids to multiple locations, and individual flows to the locations are supposed to be evenly distributed. To evenly distribute the flow, control valves are installed on individual lines, and the pump is equiped with VFD on discharge pressure control...
  2. Renoyd

    Liquid residence time for FKOD sizing?

    Yes,Morten, it's a horrizontal vessel. Chemjock, FKOD's are normally sized to remove 300~600 micron droplets, and enough vapor space will do. Flare stacks can normally handle the small droplets without problem. What does the residence time has to do with the settling of liquids and vapor?
  3. Renoyd

    Liquid residence time for FKOD sizing?

    Hello, In my previous FKOD sizing experience, I didn't need to consider the liquid residence time, even the API recommended sizing method does not mention the liquid residence time requirements. In a recent heavy oil job, the FKOD is required to have 20 minutes residence time, is this normal...
  4. Renoyd

    Basic question about motor

    For a 40 hp motor with 1.15 service factor, when the motor starts to pull high amps like 52 amps, what would be the horsepower being consumed? Is it still under 40 hp like 38 hp, or it is already higher than 40 hp like 45 hp?
  5. Renoyd

    Glycol Regen PSV

    Thank you MTChE for your response. The design pressure of the reboiler is 15 Psig, and the PSV is set at 15 Psig too. Is that not normal based on your 5 psi statement? "these glycol reboilers are generally not code vessels and cannot handle more than 5 psi" - Can this justify that the fire case...
  6. Renoyd

    Glycol Regen PSV

    Hello, Has anyone sized a PSV on the glycol regen reboiler? What would be case here? Rich glycol from the flash drum level control valve goes to the still column that opens to atmosphere with packing inside. The rich glycol going into the reboiler is heated by the directly fired firetube, and...
  7. Renoyd

    Valve sizing for flashing liquids

    I thank everyone for your valuable input. What exactly is the definition of flashing here? Think about the following two cases: 1) Dehy contactor level control valve: some dissolved gas flashes out from the glycol downstream of the valve. 2) Refrigeration chiller level control valve: propane...
  8. Renoyd

    Blowdown with liquids

    Hello, For gas plant blowdown calculation, if the vessel has liquid in it, how would the calculation be done? Thanks
  9. Renoyd

    Valve sizing for flashing liquids

    Jimcasey, When you say effective dp, is that allowable dp used for sizing? If P1=150 psig, p2 needs to be 10 psig (process requirements). However, the allowable dp is only 20 psi. Then 20 psi is used to size the valve, say, passing the total flow at 70% opening. So, the valve will be 70% open...
  10. Renoyd

    Valve sizing for flashing liquids

    Hello, What would be the proper methodology for sizing a control valve with liquids flashing downstream? Fisher recommends allowable pressure drop method that results in a larger valve than using actual pressure drop. The question is, how can I get the required pressure drop if the much lower...
  11. Renoyd

    Temperature control at HEX process fluid

    If I understand correctly, you need 2 control valves: one is on the shell inlet line controling the tube outlet gas temperature, and the other one is on the shell condensate outlet controling the level to maintain certain pressure.
  12. Renoyd

    Pump Vs Blowcase

    Good explanation, David.
  13. Renoyd

    Pump Vs Blowcase

    Hello, For a separator liquid outlet, what are the pros and cons by using a pump against a blowcase? Speciacally, will this choice affect the slug capacity required for the separator? Thanks.
  14. Renoyd

    Sour gas flare stack

    Milton, There is no SRU present. It is just a flare for a wellsite PSV's, Blowdowns... JLSeagull, Yeah, you are right. Incinerator is definately an option. David, You've got a good website and lots of useful information there. I did the modeling basically using EPA screen3 method. 55% heat is...
  15. Renoyd

    Sour gas flare stack

    Hello, After SO2 dispersion modeling, the flare stack has to be 500 ft to meet the regulations, in addition to adding fuel gas, what are the other options? If adding fuel gas, how to operate? Thanks.
  16. Renoyd

    Gas engine derating

    Thanks for sharing. I will study the articles.
  17. Renoyd

    Gas engine derating

    Hello, Can anyone introduce the derating of compressor gas engine due to the fuel gas quality? How to judge that the engine needs to be derated? What are the related factors? etc. Thanks.
  18. Renoyd

    adjustable port valves

    Thanks for your input. What is usually specified for design purpose for an adjustable port valve if the capacity is to be controlled to a certain level? For example, if I wanna limit the capacity to 1 MMscfd under the operating conditions, the port opening needs to be very small, what is to be...
  19. Renoyd

    adjustable port valves

    As far as I know, it is a kind of valve with port height adjusting knob and port width positioning level to adjust the dimensions of the port. Just wondering if it has a full range of continuous throughput control from zero to max capacity, or just uncontinuously like valves with 1/4" trim, 3/8"...
  20. Renoyd

    adjustable port valves

    Merry christmas, Can anyone explain the usage of the adjustable port valves? By adjusting the port size, we can change the valve capacity, right? To restrict the flow (when fully open) to a very low level, do we need a restrict orifice, or the adjustable port valve can do it itself? Thanks.

Part and Inventory Search

Back
Top