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  • Users: longeron
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  1. longeron

    AMSE VIII vs. U Stamped Vessels

    Gents, I'm quite new to pressure vessel codes, I usually deal with a specialized pump part. Vessels are used as part of a support system to keep the part I'm familiar with cool and clean while in service. I hear my customers talk about requirements for a U stamped vessel when the internal...
  2. longeron

    Pump Warm Up Procedures And Hot Alignment

    After a quick search of the forum I did not see much discussion of start-up procedures for hot pumps. My question is three-fold regarding warm up: How quickly do you allow pumps to be warmed up? I've heard that most OEMs suggest about 100F per hour to allow even thermal expansion. How do...
  3. longeron

    Pump Repair- Best Practices

    I'm trying to convince the Millwright Superintendent I work with that we should overhaul our pump repair procedures. For example our millwrights do not complete a pump repair form during each repair. Or- the decision to replace bearings is subjective- based upon the lift check, "shaft spin...
  4. longeron

    Bearing Failure Analysis Info

    I've Googled this before without much luck. It seems SKF and NSK want to people to keep paying for classes. Are there some sources for information on FA that I've missed?
  5. longeron

    API 610 Cooling Water- Pedestals

    I spent a good bit of time over the weekend looking for information on bearing housing, stuffing box jacket, and pedestal cooling. Does anyone have links or more information documenting the current philosophy on piping cooling water to these parts of a pump? I'm fairly certain that Heinz Block...
  6. longeron

    High Head Low Flow - Opinions

    The earlier thread about Sundyne pumps got me thinking. There are a few well known names in the high head/ low flow segment of pump OEMs. Of course Flowserve, Goulds, and the other majors will offer straight vaned versions of their ANSI products, but I'm thinking of specificly designed pumps...
  7. longeron

    Dealing witih Overseas OEMs

    How would you handle the following situation: The projects group in your plant is going to buy a compressor or a pump and in going out for bid some OEMs from outside the country submit fair quotes. They are considered and look like good choices for the service in question. Being a reliability...
  8. longeron

    Hollow Shaft Vertical Pumps

    So, what is the real advantage of using a hollow shaft pump? It seems to me that installation is a lot like threading a needle.
  9. longeron

    H2SO4 Alky unit solids

    I'm having diffuculty with an H2SO4 Alky Unit reactor... Tar like solids which I understand to be the product of a reaction of the acid and Isobutane seem to end up downstream. The pumps that move the product downstream, called effluent pumps, also supply the flush for the reactor...
  10. longeron

    Graphite Loaded SiC

    I've been hearing a bit about some new graphite loaded Silicon Carbides ( Purbide PGS-100 or CoorsTek SG-35- I think these are two of the materials being sold) What is the big difference between these materials and say Alpha Sintered SiC or Reaction Bonded SiC? The material is currently being...
  11. longeron

    Canister Filter Head loss

    I'm putting an aquarium filter system together and I was thinking of using canister filters for the last stages. While walking through Lowes I noticed the canister filters for household water filtration and thought that they were cheap enough and easy enough to use. Now I'm trying to make a...
  12. longeron

    turbine compressor seals

    Hey. I'm interested in learning about the brush and other kinds of seals used in gas turbine compressors. I just read a NASA white-paper about some research done on an all metal seal that could be used at high temperatures and large rotor runouts. The comparison between these seals and the...
  13. longeron

    Clean Power

    I've been thinking about trying to clean up the AC that my system uses. Too much white noise. I've stopped by several high end shops and been discouraged. I've seen the Richard Gray's Power Company Power Conditioner, sounds o.k., but the sales pitch sounded like double E mumbo jumbo...
  14. longeron

    Control Valve effects on a pump

    I’ve got a question about control valve operation. I was walking through one of the plants that I’m contracted to yesterday, and I noticed that the discharge of this pump was cycling between 45 and 10 psig. Now, I haven’t looked at the P&ID yet, but it is my guess that downstream a control...
  15. longeron

    Balun

    Could someone please help me with a quick review of baluns? How do you figure the impedance at the feedpoint of your antenna (say a folded halfwave dipole) and how you'd match transmission line to that?
  16. longeron

    Elastomer and Mechanical Seals - Refrigeration Compressors

    I was wondering what experience people had with R-134a and POE in refrigeration compressors, specifically with HNBR or neoprene elastomers, as well as with mechanical face seals. Is there any real debate about the preferred elastomer for this service? I’m new to compressor seals and I’ve...

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