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  1. koalmnr

    drawing/document sign-off and release

    Note: 21 CFR Part 11 (Code of US Federal Regulations volume 21, part 11) pertains to the US food and drug industry (eg. under USFDA guidlines) and deals with drawings and documents that relate to current Good Manufacturing Practice (cGMP's). As long as the work you are doing does not deal in...
  2. koalmnr

    Vacuum control by changing motor speed?

    As Torricelli commented, your problem is your control element. A ball valve with mechanical linkages is not a very sharp controller. Using a regular control vlave, you should be able to easily control (all else being capable of it) to 1 to 2 % or better.
  3. koalmnr

    Vacuum control by changing motor speed?

    Could you, yes. Efficeintly and quickly, no. If you are looking to make major step changes this could be used. Just like any pump, the volume head relationship is partly dependent on pump speed. but this wil not give fine level of control, also it would probably impact your volume, which...
  4. koalmnr

    Haul trucks in crusher area

    You normally start with the dump hopper (crusher feed) and work putwards. Size of hopper, is it covered (often reauired for environmental or climatic reasons), how many trucks dumping at once (side by side or on adjacent sides), any truck waiting area, is it built into the side of a hill (often...
  5. koalmnr

    Need input on belt cleaners

    First off, don't try a brush type with wet or sticky material (e.g. clay). Next, almost any belt cleaner will work for the first 1000 hours. After that most need adjustment. The simplest is to set up a weekly program to adjust and repalce as needed. Unfortunately this takes labour hours...
  6. koalmnr

    Coefficient of Determination or Root mean square Error?

    Let's start with the RMS error. 87% can sound bad, but only if it is compared to another regresion analysis that provides a better fit. You can have a close fit and a high RMS error if you have significant scatter in your data. Have you plotted the 95% confidence intervals? Does all the data...
  7. koalmnr

    Brake linings on hoists

    The aircraft indutry has been doing this for several years. See: http://www.hydroaire.com/products/BrakeTemp.htm for an example. Also see: http://www.raylin.com/ fpr the trucking indusry.
  8. koalmnr

    density separation references

    By any chance are you referring to density tracers? Blocks of known density that are placed in a streaming to trace how well the unit is performing. See: Evaluation of Coal Cleaning Efficiency Using Transponder-Based Density Tracers...
  9. koalmnr

    Volume of Oxygen

    The perfect gas law is PV=nRT: P-pressure in atmospheres, V-volume in liters, n-number of moles, R-gas constant (0.0821 liter-atmosphere/deg K/mole), /T temperature in deg K. Of course you didn't specify the length of the hose, which makes a difference based on: V=sqrt(25000DP/L): V-air...
  10. koalmnr

    Steam separators

    Yes What size?
  11. koalmnr

    Rubber Liner Removal from Vessel

    Try contacting a used equipment vendor and sell them the lined vessel. Make money instead of spending. Altenatively try heat. If you still have information on the linear find out what temp it was installed at. Heating it above that temp should make it delaminate.
  12. koalmnr

    Pellet Mill Ring Die Cleaning

    We are using a CM-Roskill Pellet Mill with ring dies for making catalyst pellets. We are having problems on cleaning plugged dies for reuse. Any informaiton on how best to clean ring dies is appreciated.
  13. koalmnr

    Anyone ever use a Wilfley table?

    A good source for concentrating equipment in the US is http://www.sepor.com They have Wifley tables.
  14. koalmnr

    fluid flow with chemical injection

    Taking your numbers as being correct, then your quill is about 3/8" diameter and you have about .45 delta p pressure differntial between the quill and the line it is being injected into. Considering that and that the quill is at the center of the line and perpendicular to the line (you have...
  15. koalmnr

    fluid flow with chemical injection

    The turbulent flow should cause mixing. BUT! The key question is relative viscosity of the two streams, and the distance from the injection point to the discharge. Also the relative miscability of the injected chemical into the base fluid is a factor.
  16. koalmnr

    Syntron Feeder

    A good place to start is FMC Syntron (www.fmcsyntron.com/ or http://216.255.148.39/). If you know about when and by whom it was purchased they can often track down the rest of the information. Also just giving them the use information they can help size a new one. I had them track down a 25...
  17. koalmnr

    cost estimation for small pilot

    One aource I have handy for pricing small equipment is McMaster-Carr: http://www.mcmaster.com/
  18. koalmnr

    density separation references

    Two good refernce works are the Mineral Engineering Handbook and Coal Preparation both avialable through the Society of Mining Engineers at http://www.smenet.org/digital_library/library_book_reader.cfm

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