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  • Users: micalbrch
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  1. micalbrch

    Overflow or unloader valve manufacturer wanted

    Dear All, I'm looking for a spring loaded and manually adjustable overflow valve. PD manufacturers call it sometimes "unloader valve". It must be made of stainless steel, adjustable up to 4000 psi and must be able to release a flow of 150 l/min (40 gpm). Does anybody have any idea where I can...
  2. micalbrch

    Does brake horsepower include volumetric efficiency?

    Hello Everybody, If I had to answer my question, I would say YES but I haven't found any standard where this is explicitly described. I checked Hydraulic Institute and also API 675 but couldn't find an answer. I remember that there is one power definition which does not include the volumetric...
  3. micalbrch

    Lined Check Valve

    Hello together, Does anybody here know a manufacturer of lined (coated) high pressure check valves? We have an application for well water with extremely high chloride content - average 90000 ppm, max. up to 150000 ppm. Ambient temperature, pH between 6.5 and 7, no solids. Required size is DN...
  4. micalbrch

    EEx motor designation

    Dear Colleagues, Electrical equipment like motors must be accordingly stamped when designed for use in an explosion proof environment. Acc. to the European code the stamp started with EEx. This standard (EN 50014) was replaced (4 years ago?) by standard EN 60079. Now the stamp starts with Ex...
  5. micalbrch

    Equivalent for # 4 polishing

    Gentlemen, Can anybody give me an ISO, EN or DIN surface roughness equivalent for #4 polishing or just the corresponding micron value? Thanks in advance for your help!
  6. micalbrch

    6" PN 250 valve manufacturer wanted

    Good day everybody, We are looking for a 6" (DN 150) PN 250 ball valve for a test stand (pure water). Valve shall be electrically driven plus option manually actuated. EN or ANSI flange doesn't matter. Does somebody know a reputable manufacturer? It shall be a ball valve (full ball or half...
  7. micalbrch

    254 SMO/1.4530 Alternative Material

    Hello Colleagues, We are a looking for an alternative material apart from Hastelloy C for 254 SMO. The part that needs to be manufactured is a 1.2 m long cylinder (ID 200 mm, OD 245). The raw material can be either casted or forged. Any recommendations?
  8. micalbrch

    Suitable materials for handling cude oil

    Hello together, I've learned that "crude oil" is a rather elastic term but nevertheless we sometimes have to deal with that in terms of material compatibility. I know that EPDM is a nightmare with any kind of oil and that PTFE is usually good. But for what kind of cude oil BUNA-N or FPM can be...
  9. micalbrch

    Titanium Grade 2

    Hi Everybody, Can someone explain to me the difference between Titanium Grade 2 and Grade C2? Am I right that "C" just stands for casting which means Grade 2 and Grade C2 is more or less the same? Thanks in advance for your help! Michael
  10. micalbrch

    pH Values of various acids

    Dear All, I hope that somebody can help me. I'm looking for a chart/graph/table which shows the pH values of some inorganic acids vs. the corresponding acid concentration in percentage. I'm looking after it for some weeks now but haven't found anything yet. The acids for which I need such a...

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