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  1. LucayaLive

    Resitance time calculations

    Your question is unclear and there are some missing pieces to the puzzle. Are you asking approximately how long would it take for the outlet concentration to be be equal (or nearly equal) to the supply concentration? If so, then its unclear what you mean by "how much TA will it be at that...
  2. LucayaLive

    Calculating amount of steam required

    Abamin, You probably use less 30 PSIG Steam because the latent heat of vaporization of 30 PSI Steam is greater than that of 150 PSIG steam (check your steam tables). Heat of vaporization is only constant at constant temperature. That means condensing a pound of 30 PSI steam transfers more...
  3. LucayaLive

    pump closed circuit

    Both pumps will eventually over heat. The pumps are performing work on the fluid(s) which will manifest as temperature increases if the fluid continuously recycles. There is not enough information to say what the suction and discharge pressures will be nor is there enough information to speak...
  4. LucayaLive

    Pharmaceutical engineering?

    itskg, Pharmaceutical Engineering involves the application of Engineering, Technology, Scientific and Mathmenatical principles to the Pharmaceutical Industry. I can not say whether it is as difficult as a pharmacy major because I am not a pharmacist. I am a chemical engineer who has worked...
  5. LucayaLive

    Proper Valve for a Organic Solid Charge Chute

    JimCasey, Thank you for your response. I should have been more specific. The valve is needed to hold pressure on the reactor once the charge is completed. I don't think rotary valves would hold pressure (they are typically used to maintain inert atmosphere in charging vessel, are they not?)...
  6. LucayaLive

    Proper Valve for a Organic Solid Charge Chute

    We have several applications where charge solids into vessels via 8" and 6" diameter charge chutes. These vessels may contain organic solids. We have tried knife (gate) valves, qurter turn ball valves and butterfly valves and each failed for a variety of reasons: Knife Valves get solids stuck...
  7. LucayaLive

    Source of Corrosion on Cast 316 Stainless Steel Valve

    We have a 10" rotary valve that handles a dry pharmaceutical solid. The valve body is cast 316 SS and the rotor is 304 SS. We have seen surface corrosion on the interior surfaces of the valve inlet. It almost looks as if that portion of valve body is carbon steel clad with 316 SS. The rest...
  8. LucayaLive

    new facility master validation plan

    Lotus7312 HEC is quite right, a Master Validation Plan is no small task. The Validation Plan is a roadmap that defines what you are going to to do (and by implication, not do) to validate the Plant. The scope and approach of the MVP depends on whether you are validating a Plant (in which case...
  9. LucayaLive

    Stability of Isopropyl Ether during Storage

    We currently store Isopropyl Ether in a 20,000 gallon 316 SS Tank. The Isopropyl Ether was purchased with BHT added to stablize it against peroxide formation. I need to get guidelines on how long we can store this material - turnover has been very slow. How we can test for peroxide formation...

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