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shvet, What you have shown in the photo with the gold and blue fittings is very near what I am looking for if you have a vendor.

Littleinch, In our case we have primarily 2" hoses. We really only need two separate hookups. Those for the process of concern and those for normal process. I am ultimately in need of an alternative to cam & groove. We could make every thing for the process of concern flanged, but I don't...

Thank you all! pierreick, In our case, we have five vessels that we run a particular product line in. The concern is that residue from these products may remain in hoses / pumps / filters and contaminate other products produced in other five vessels if those hoses are inadvertently used. (ppt...

I am looking for a hose connector which can be keyed to prevent connecting to the wrong tank. What I am looking for is very similar to a standard cam & grove fitting, except for the male plug has a few pins in place which can only mate with a female socket with grooves for those pins. I had a...

We have a de-ionized water tank in operation in which we have experienced issues with algae growth. The line feeding the tank is treated with a ultraviolet sterilization system. After testing immediately before and after the UV system it appears to be working very well. However once the water...

A topic I heard a good bit about while I was in school was "life long learning". In a recent employee evaluation the comment was made that I needed to consider taking classes in topics I was interested in. I routinely find myself researching / studying / reading to figure out problems. But...

Latexman, My apologizes for the delay in my response. Between holiday and vacation, I've been out of the office for the past week and a half. My Perry's is the 7th edition. Equation 18-18, is basically the same as that shown in Kern 1950, Equation 20.1. These are the same equation as the one I...

I am trying to develop a model for the change in temperature of an agitated tank with a steam jacket with time. In section 5.2 of Transport Processes and Unit Operations by Geankoplis, there is an equation (5.2-3) which describes the change of temperature of a solid object with time (eg...

We've got a small 600 gallon mix tank on load cells. When a forklift drives near the tank, the load cells deviate wildly, swinging 50 pounds or more. We've taken a core drill and sampled the concrete next to the tank. It's roughly 6" thick. I should imagine the question of how thick concrete...

pierreick, We have a vessel with a solution containing a solvent. That vessel is connected to an overhead condenser which drains to a receiver tank. Vacuum is applied to the receiver tank, the solvent evaporates in the vessel, is condensed, and caught in the receiver. Ideally the outlet of the...

Thank you for the link RVAmeche. Unfortunately it isn't a selection guide, but a sizing guide for which I am looking. An example might be, I have a 10,000 gallon vessel from which I want to distill off 2,000 gallons of MEK, over a 12 hour time period at some temperature, say 60*C. What would...

We've got several processes which we perform vacuum distillation on a batch basis to remove solvents. In some cases we use Nash liquid ring, they are real work horses. In other cases it is a smaller Kinney vacuum pump. I'd like to develop reasonable justification for what vacuum pump we use...

From what I gather the Process Safety Time is the duration of time from surpassing an Operating Limit until you reach the Safety Limit and a failure occurs? If it is specifically a spread sheet for tank levels which you're looking for, if you google "vessel volume.xls" and take the first link...

georgeverghese, thank you for the references in Kern. We are probably looking at about 25 psig for the steam supply. I don't have exact details on what style steam trap is going to be used, but I was not expecting to flood the heat exchanger with condensate. We will definately keep this in mind...

Thank you all for the quick detailed responses. TBP, I had worked out the LMTD similar to what you've listed assuming no cooling on the condensate. I'll see if I can track down a copy of the book you referenced. I've seen a similar method in a Warren Control Valve catalog. TiCL4, it will be...

Can you stop the organics from getting to the vacuum pump to start with? Possibly by pulling through a condenser with chilled water? Also consider flushing the seal water from the vacuum pump before and after use.

Good morning, I'm looking at heating water using a heat exchanger with steam. I have dozens of examples of sizing heat exchangers with liquids on both sides, but I have not found any references to using steam on one side. I know how much heat is in a pound of steam. I have estimates of...

MortenA, Roughly speaking I'm looking at an 8,000 gallon vessel which is half full being slowly heated to maintain 80*C. I am considering z1 to be 0ft at the surface of the liquid. I'm trying to determine how well mixed the headspace will be. If it is well mixed, I would think z2 would be...

Latexman, Thank you for the quick followup!

TiCl4, I may be somewhere in the middle. I am estimating 20 ft3/min air flow and around 350 ft3 headspace to start with. I have not yet had the opportunity to measure the air flow, so it may be significantly more. For the diffusion coefficient for water into air at 80*C, I am looking at 1.47...