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I'm curious about anyone who has experience with LARGE tumbling operations. We have a large volume (perhaps up to several tons a day) of oblong ceramic balls ~1.5 cm diameter that we would like to make more round, preferably marble roundness. surface finish is not important as long as it isn't...

I'm looking into parallel mono-tube boilers for producing 15 psig steam from concentrated sunlight. (I guess parallel makes it not so much a "mono" tube, maybe water tube is more accurate). Looking into using aluminum pipe. I would want to use compression fittings, but generally they are not...

Thanks all (especially Skearse) for the useful replies. To clarify, I didn't say that i couldn't measure the temperature, I said that i couldn't measure the temperature of the vapor to determine its pressure (because it is super heated). Of course, thinking about this a little, I realize if I...

I am researching methods for coating oddly shaped agricultural seeds with a hard spherical coating. A simple building up of layers of films will not make a long thin seed round, except perhaps with an excessively thick shell. Other methods involve isolating individual seeds and delivering them...

Thanks seagull, So, as far as material compatiability goes, there is only window and bourdon tube material? Is there not sometimes an oil, or lack of oil? the apparatus is an adsorption chiller, where methanol is being driven off an adsorbant. So, I can't measure the temp at which the...

A test apparatus contains saturated methanol gas being condensed. I'd like to have a pressure gauge tell the pressure of the gas. I have found gauges rated for R-14a, ammonia and other common refrigerants, but nothing explicitly for methanol. Is there a way to tell if a gauge is fit for use...

dxasto: are you referring to hexane? While approved as an oil substitute in food in low quantities, its msds safety sheet looks hairy at best. Working with Propane looks much safer for the operators. select hexane risk phrases: Highly flammable Harmful by inhalation Danger of serious damage...

thank you for the detailed response. This is a pilot/laboratory setup and a larger scale is beyond the use we currently have for the apparatus. We haven't looked into discounts on co2 when buying at high volumes. At retail prices, electricity is cheaper than new co2. I assumed a compression...

In a medium scale process using liquid co2 as a solvent, we wish to recycle nearly pure co2 gas to 800 psi liquid. co2 gas is above atmospheric pressure and below 20 psia. about 400 lbs (200 kg) of co2 to capture per day. Because co2 stream to be captured is from a tank in the first place, i...

A corrosion resistant alloy would be ideal. I was quoted 110 dollars for a 900# carbon steel flange and 1,100 for a 304L stainless one. Building the entire reactor from stainless would be 10 fold the price. So, if it costs $2,000 to do an unusual plating process, the vessel is still much less...

I am new at this, "experimenting", and have a small laboratory setup. all three. My concept is probably pretty naive, so its best you hear the whole system. This is the co2 reclamation section of a liquid co2 solvent process. liquid CO2 at 900-1000 psi dissolves hydrocarbons out of a...

also, electroplating silicon and then anodizing may be possible. I've seen anodized silicon cookware, but doubt this process is superior to nickel plating.

I have a co2 gas stream to be captured and stored. 400 psi and below room temp. Water must be removed first. We are thinking 1/4" stainless into a filter with an adsorbant into 1/4" carbon steel pipe. Any suggestions about filter manufacturers or filtration strategies? so many good ideas...

We have a carbon steel vessel that will contain a food grade process. Also, there is significant acidity that would corrode the steel. Enameling sounds like a finiky process, though we are considering it. electro and electroless nickel plating sound potentially useful. the vessel is several...

I've sent an inquiry to green, tweed but have not heard back. Dsheets05, I dont understand your seal design. is the bottom portion containing the o-ring actually two pieces, or do you squeeze the oring to get it in there? how do you get it back out to replace it or check for wear? also, where...

If you need the low rpm because of the output you want (gushes of liquid every 30 sec), then a simple toilet like accumulator could do that from a common pump. few power sources give any decent power with any reasonable efficiency at low rpm. also, smaller cylinders being filled and emptied...

The force needed to suck water into the chamber above "sea level" (water level) is the psi vacuum needed times the cross sectional area of the piston. IE: to lift water 10 feet, 5 psi vaccum is needed (1 atm=15psi=30 ft water), with a 2 square inch piston thats 10 pounds, plus some pounds for...

We'd need more information still to direct you. For instance, fluid refers to both gas and liquid, and there are different requirements for each in a pump (sealing purposes). You can determine the volume per stroke of a pump with its RPM and gallon per minute figures (if you were buying an...

wow, thank you for that incident report. That is almost exactly the system i am working on, and reading the report was like seeing my own device clogged and dangerous. It's recomendations were highly relevant, and all will be followed. In california, all the complete system requires is an...

you cool the liquid to a temperature such that the rise from the heat of compression and friction does not bring it to boiling? Or are there other concerns? I have a similar situation and would like to find a suitable pump for CO2. 5000 psi and capable of a few gallons a minute for short...