My concern is trying to figure out a method of determining the degree of AC piping degradation prior to a complete failure. Does AC pipe shed asbestos at given rates vs age, or are there other factors that accelerate degradation? Will NTU units rise as the pipes shed?
Not my area so I have a lot...
Not my area, but I'm trying to put together a device with a PID that would control two steeper motors on needle valves( one hot and one cold) to give me constant water temperature flow.
I want to keep it simple.
Any practical ideas, on sourcing stepper motors, needle valves etc.
Thanks
If a ground wire in a wire cable(6/3) nmwu was cut, what would be the correct method of repair? I've heard of using a crimp or a split bolt connector.
It is not practical to rerun a new cable(cost etc).
The ground is about a #10 stranded wire. All of the other conductors are ok.
Open to suggestions.
Our water supply comes from a small lake and the only treatment to it is
chlorination. The THM's are getting close to the max as set out by the
province,(sorry I don't have the value in front of me).
Any suggestions on treating the water to remove the THM 's?
Some have suggested a DAF system...
I have an RF signal at 2 Ghz that I want to use to turn on a relay and keep
the relay on as long as the Rf is present.
Any suggestions on circuit design to accomplish this?
Thanks,
I recently had an Apple Mac Pro tower that was stolen from my office.
Is there anyway that I can track this computer without having to go thru
Apple?
Any suggestions would be appreciated.
Yes it was reported to the police, yes they did the usual investigations.
Thanks.
Looking for historical information on street light controls.
I'm interested in knowing how street lights were controlled
in the 1950's and 60's. What was used before the photocell,
or has it been around from the beginning? If mechanical
timers were used did they need to be reset for varying...
I reallize that the above mentioned autoburette is no longer made by Radiometer, but I need to repair the one I have. Unfortunately we have no service manual or schematic. Any suggestions or directions would be greatly appreciated.
We feed ferric sulphate thru a 1" pvc line to our water plant clarifiers. I've noticed that the line will get partially plugged after 3 or 4 years, to the point that the line is only half available .
We store the ferric sulphate in fibrglass tanks.
Could the precipitated out material in the pipe...
I'm using mild steel to transfer powdered lime from a semi to a silo. The lime needs to be lifted by air some 40 ft high, then on to the silo. In the transition from vertical to horizontal the lime goes thru an elbow. Due to the fact that lime is aggressive on the steel the elbow tends to wear...
What would the average life of pvc piping would be if it carries high free chlorine gas mixed with water?
Piping is 3" diameter and the chlorine is as high as 4 ppm free. The temperature can be as low as 3C for prolonged
periods.
How are design failure rates determined for equipment that is produced? I know that this is a rather broad question, but this is not my field. Thanks, any assistance would be greatly appreciated.
I've been looking at the Halogen line of valve closers for ton containers of Cl2. Has anybody got any direct experience with this brand, good or bad?
Where is the best place, other than mfgr to get design failure rates on products?
I'm looking for a video that show what it looks like when a valve is not functional(broken) and the tonner is allowed to totally evacuate. I've seen a video clip a number of years ago but I'm not able to relocate a copy.
Secondly, has anyone calulated how long it would take for a tonner to empty...
Hi:
I'm pumping 29% aqueous ammonia with a positive displacement pump. The ammonia is transported thru a 1/4" plastic pipe to its dispertion point.
Near the point of application I notice bubbles being formed in this plastic line. The length of the plastic pipe from the pump to the dispertion...
Hi:
I'm looking for a proven product that can do the following with five chlorine tonners.
1.Close automatically in the event of a chlorine leak.
2.Fail in the safe mode, ie valve closed, not open.
3.Be independent of plant line power.
4.Operate every time, or at least keep trying to operate...
5wp(Civil)
Hi:
I have a 36" water supply line that is used to fill a 12.5 million gallon remote
reservoir(about 6 miles from the pump). The fill line is a dedicated line, with
no tap offs along the way and several check valves in line.
Water leaving the plant is at 100 psi. Temperatures vary...
