Transformer was definately sealed and not open to atmosphere. So what am I actually seeing when I have the tube to atmosphere on a sealed transformer??
EE's,
I have a question about checking oil level in transformers. We recently checked the oil level in all of our transformers. We connected a fitting to the drain valve and then connected tygon tubing and held the tubing to the height of the transformer. We cracked the drain valve open and...
Hello EE,
How do you know how much oil you have in your transformer with a level gauge that has the indication of Low, 25 deg C, and Hi? The needle of the level guage is currently slightly higher than 25 deg C. Am I suppose to reference that temperature to the transformer oil temperature...
Gentlemen,
It has been a long time since I have dealt with pump curves. I have a pump that has a 7.375" diameter impellar, 159-gpm BEP, and 187' TDH. I have also attached the pump curve. Is it possible to get 170 gpm out of this pump? Currently in the field we can't meet a 170-gpm setpoint...
I am new to the environment of mechanical seals. What cut sheet comparisons/compatabilities are we looking for when replacing an obsolete design mechanical seal with a newer design mechanical seal? Obviously shaft and bore diameters are imporant to match. Are there any other comparisons that...
Anybody know what are some good safe repair working practices on above ground double wall fuel oil storage tanks? We have some small corrosion damage on the top side of the outer shell that needs to be repaired. It will have a small gradual leak out of the storage tank when the outer shell is...
The original tank manufacturer is no longer in business. I contacted API and they said if there is no longer a nameplate that has the API monogram and certification the tank is no longer API 650 standard qualified. They also said that the nameplate couldn't be replaced. The tank was...
Yes the history of the standard is useful. Alot of my tanks were built in the 1970's and I need to see old and new editions to the 650 standard. Any good websites that can help me out on that?
Gentlemen,
In the near future I will have to hire a contractor to make some welding repairs on some small pits on top of my oil storage tank. It originally had an API 650 STD stamp on the tank but has fallen off in the past. So the tank doesn't have any stamp indication of an API STF on it...
There isn't any exterior heat loads from glass. The room doesn't have any glass on the perimeter. Isn't there a standard CFM quantity per square foot for people office use?
Greetings!
Does anyone know how to calculate a CFM quantity for a 24' x 16' office area? There isn't any servers or extra heat load in the area, it is just people. Currently I have 1200-CFM serving this room and the users are still complaining about heat/cool airflow issues. Any guidance?
Hello all,
I have a refrigerant recovery tank with an old manual that gives the maximum amount of pounds of R-500 and R-22 the tank can hold at one time. We are currently using R-134a and I need to find out the maximum allowable pounds of R-134a I can recover in the storage tank. Anyone know...
Question for the refrigeration engineers.
I have a 1000-ton York water cooled centrifugal chiller at the plant. It is 1 shell (condenser and evaporator are in 1 shell). From the manufacturer's operation and maintenance manual it doesn't show or talk about an interstage cooler (Innercooler...
Does anybody know if you can take the PE exam with 8 years or more of engineering experience? I got my BS of mech. Engineering from an ABET credited university and I never did take my EIT in my younger years.
The plant I work at uses 120-psig of instrument air for the site. The air temperature leaving the last stage of compression is from 90 to 75 deg F. Most of the instrument air loads consist of control valves for air handlers which the pressure is reduced to 30-psig. Other instrument air loads...
