Recent content by trihydrate

Could it be that ASME had to change the nomeclaure in order to maintain the perception of a Higher Authority?

Yes, flux is required when silver soldering. It is also required when low temperature soldering. Since you have asked if flux is required I must assume you have never tried soldering before. That leads me to ask if you need the additional benefits of silver soldering over the common low...

ProjectEng, Are you solving an existing problem or solving a problem that might exist? The reason for that question is, there are thousands of RO systems out in service that do exactly what you describe, start and spike from 0 to 200 psi without identifiable problems. Is it the best...

In an old copy of "HANDBOOK OF CHEMISTRY AND PHYSICS", published by "THE CHEMICAL RUBBER PUBLISHING COMPANY", there is a table of Vapor Pressure for Organic Compounds(Pressures Less Than One Atmosphere). The table gives the temperatures at which the vapor pressure of the...

jOmega and electricpete, Thanks for your comments. I need to clarify a couple of points. First is, I have been told and believe there has been no wiring changes in the last six months. This would tell me if induction voltages were the problem, it would have been a problem for the last six...

I worked on a 120 VAC system that had a water conductivity instrument with a 125 mA time delay fuse that had been blown. I first replaced the instrument and after 30 hours, the second instrument's fuse had blown. A 250 mA fuse was installed and it blew immediately. I placed a DMM on the power...

Massey, You have discovered a very key fact about the way our minds work. That is, your mind works best when not stressed. I have read a book by an author named Alfonso Lopez, titled "Double Your Capacity In Two Hours". He can be reached at alfonsoafrica@yahoo.com. It is very...

I downloaded the spreadsheet noted by MJCronin from Sharpe and found that it apparently does not consider viscosity in the Hosepower calculation. I changed the viscosity values from 1 to 1000000 and it did not change the horsepower. Be careful!

Tuxedo, The only suggestion I would have is to use the switch contacts on a mechanical astronomical timeclock as inputs to the PLC. The mechanical time clock is relatively inexpensive and the PLC could handle the rest of the logic. I didn't say it was a great idea. Good luck.

I do not have any experience, but I do have a suggestion. Mix liquid fertilizer into the demin water at the rate of 100 ppm. You no longer have demin water, just some exceptionally good quality fertilizer. Good luck!

I understand the reason for your question now. I'm not aware of any bladder as you asked. The next thought that comes to mind is using heat trace and the better insulation you talked about. It seems it would be easier to fab. I also wonder if you are getting some cavitation, hence cooling...

Wouldn't it be easier to use a heat exchanger just prior to the pump suction and then insulate the pump?

You might investigate using a liquid ring vacuum pump with the oil as the liquid.

If you were able to use a suction plate and pulled a good vacuum, the 8 inch square plate would allow over 900 pounds of separating force.

Does anyone know of a source of 18-8 stainless 1/4 - 18 NPSM Hex Nuts? Machinery Handbook defines NPSM(National Pipe Straight Mechanical), but they seem to be a bit rare. I need a few(7) for a prototype. Thanks for the help.