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Good day, ladies and gents. I'm currently working on bid tendering for an ethanol storage vessel(aboveground, vertical) whose contents will be used to produce hand sanitizer gels, mouthwash, etc. To what standard should the ethanol tank be produced? To be 3-A or EHEDG compliant, e.g. no...

Parker recommends the use of a hard chrome plating on the bore for a reciprocating piston sealed with an O-ring. What are the qualities of hard chrome, besides hardness if any, that make it so suitable as a counter-wearing surface? Are newer coatings like TiN superior?

@BrianE22 - I didn't think of that! But, the problem is that I want to minimize the parallel distance between the plates, and there is a solid pulley in between, so the bearing would interfere with the pulley unless I pushed the plates apart. I'll have to think about it. @BillPSU - I'm not sure...

I don't see the body, only the handle. My program is asking for MasterForm.sldprt.

Here's a picture:http://files.engineering.com/getfile.aspx?folder=57f72b29-676b-45a3-8308-9e07c81fb3fd&file=drive_end.png

The rotating shaft is 5/8" with a standard ANSI keyway (3/32"x3/16"). The axial motion of the shaft will be retained with retaining rings in grooves machined in the shaft. The shaft will be held by two R10 bearings spaced about 2.5" apart. All materials to be stainless steel. The current design...

We need to identify all the valves and instruments in the process, both at the physical locations and on the P&IDs. Does anybody have any general suggestions for this? What would a suitable numbering system be? Also, on these slides: http://www.lle.rochester.edu/pub/documents/ext/P&ID.pdf...

I'm sorry if I didn't come off clear, but what I would like is to find the approximate drop in discharge pressure (exit of pump). If there's a way to relate that to the pressure loss (dP), I don't know what it is. I'm looking at the equation for fully-developed Hagen-Poseuille flow, and it seems...

Right now I've got a rotary pump in a system where the discharge pressure is about 350psi, and the nominal max is 200psi. One of my supervisors tells me that it's bending shafts and whatnot, in addition to delivering poor flow at the end of the system (which is weird, because it's a rotary)...

I've so far learned that PLD really can't be used for coating the insides of tubes, but can anybody answer my question about the annealing?

http://www.sandia.gov/media/diamond.htm They use PLD to deposit the amorphous diamond on a substrate, and then anneal it at high temperatures to relieve the internal stresses. Two questions - can one use PLD on a non-flat substrate? Could the laser be routed through an optical fiber? I don't...