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  1. Replies
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    These guys have nailed this problem for you...

    These guys have nailed this problem for you Bright. You will like this site.
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    It sounds like you have a huge pocket of air that...

    It sounds like you have a huge pocket of air that is slugging the pump inlet. The pump is not cavitating because the inlet pressure is high. The sound and symptoms are pretty much the same as...
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    What a great video Poodle and your explanation of...

    What a great video Poodle and your explanation of sheep and deep looks right to me.
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    You shouldn't have told me that VTP99 because now...

    You shouldn't have told me that VTP99 because now my mind is working trying to figure out how to quit working.
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    I have time to do what I want thatguy but work...

    I have time to do what I want thatguy but work isn't one of my wants.
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    How Do You Measure

    In the song The First Noel how did he know the night was deep and how is the depth of a night measured?
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    Your thoughts are on target Artrose but forcing...

    Your thoughts are on target Artrose but forcing the bubble to move isn't part of the problem even though in a real application as was previously brought out it wouldn't rise on it's own. This problem...
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    I agree with heatingman to hell with tact. To get...

    I agree with heatingman to hell with tact. To get things fixed right I had no choice most of the time but to slam dunk the so called design engineer. There were times even that didn't work and the...
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    You guys are coming up with some good thoughts...

    You guys are coming up with some good thoughts and some good ways to explain your thoughts.
  10. Replies
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    A tank is filled with water and the tank is...

    A tank is filled with water and the tank is pressurized to the point that the rupture disk on it is pressurized to the maximum it can handle. There is an air bubble near the bottom of the tank that...
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    I try to help chops but sometimes underestimate...

    I try to help chops but sometimes underestimate the reactions. The post with the container that had the rising air bubble excited a lot here. That one understandably is impossible for a lot of people...
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    I'm not going to go off on any of you. Please...

    I'm not going to go off on any of you. Please understand I wrote specifications for 25 years and terminology is crucial when writing them. The old adage that interpretation of the specs is per the...
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    It's surprising my comments caused so much...

    It's surprising my comments caused so much controversy. It reminds me of when I corrected a guy that pronounced potable water as pot able water. When I told him it was pote able he refused to believe...
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    A kid I grew up with came from down south and a...

    A kid I grew up with came from down south and a bolt to him was a tap and a nut was a burr. After terms are used interchangeably for a while whether right or wrong they become acceptable.
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    I have read the articles about what the "experts"...

    I have read the articles about what the "experts" say however in the beginning there was a pulley and they were used for rope. When belt drives came along they were called sheaves because the grooves...
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    If you're getting into commercial start using the...

    If you're getting into commercial start using the correct terms. Pulleys are for rope and sheaves are for belts. That may not sound like a big deal but a lot of experienced HVAC guys take notice of...
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    Heatingman I assume the set pressure on those...

    Heatingman I assume the set pressure on those valves is adjustable.
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    Couple all you guys have pointed out with 1/2"...

    Couple all you guys have pointed out with 1/2" fan static pressure and no wonder.
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    I designed the really big systems and they were...

    I designed the really big systems and they were vented continuously.
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    All I can say on that one BBeerme is WOW!!!

    All I can say on that one BBeerme is WOW!!!
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    Good explanation heatingman. The vents are fixed...

    Good explanation heatingman. The vents are fixed orifices and are called non-condensables vents. They vent off gases such as excess oxygen and carbon monoxide that are destructive to the piping and...
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    The "rant" was good BNME8EZ because you gave us...

    The "rant" was good BNME8EZ because you gave us an example of how well static regain design can work.
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    The most accurate method of determining CFM is by...

    The most accurate method of determining CFM is by pitot traverse. The problem with a pitot is finding a place to do one. Most of the time on commercial jobs there will be a good place but on resi...
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    I agree Ikapigian that duct problems are the...

    I agree Ikapigian that duct problems are the elephant. What bothers me the most about duct systems is that nothing has been done for years about determining system effect factors that are not known....
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    Deaerators are a crucial component of commercial...

    Deaerators are a crucial component of commercial steam systems.
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    Because some confuse head tanks with deaerators...

    Because some confuse head tanks with deaerators vegas.

    The bladder was added to pressurized head tanks to prevent water logging of the tanks. That was the only difference between bladder and...
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    An AHU manufacturer's engineer said in a speech...

    An AHU manufacturer's engineer said in a speech he made "my AHU fan will do exactly what I say until you hook your duct to it". That is a true statement.
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    The best orientation of a bladder tank depends on...

    The best orientation of a bladder tank depends on where the bladder is located. The air cushion should be at the top. It is true that in commercial applications the tanks are located at the...
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    Your point about words is a good one. I'm...

    Your point about words is a good one. I'm convinced I'm using the wrong words but haven't thought of a better way to say it.
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    BNME8EZ, for what it's worth I'm not sold on...

    BNME8EZ, for what it's worth I'm not sold on certified residential air balance because there isn't much you can do to vary airflows at the blower maximum speed which is where certified air balance is...
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    I think we are saying the same thing in different...

    I think we are saying the same thing in different words. The pressure dropping is what creates the "void" (For the lack of a better word) that allows the refrigerant to form gas pockets. If the...
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    The expansion tank location is OK. Deaerators...

    The expansion tank location is OK. Deaerators have to be above on steam systems.
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    Doing what I do that has never been something I...

    Doing what I do that has never been something I ran into. Correct me if I'm wrong but the bubbles appear because the liquid is colder than normal and has contracted to the point that there is room...
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    There are a lot of guys like you here BBeerme...

    There are a lot of guys like you here BBeerme that have earned the respect of all here. I don't know how much you have forgot but your memory looks good to me. I'm addicted to this site because the...
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    I may have been the first T&B guy here hvacker...

    I may have been the first T&B guy here hvacker and the T&B forum was started not long after I arrived. When I first started posting T&B related things here there was a lot of push back because what I...
  36. I also have both and select them in each case...

    I also have both and select them in each case depending on the application. If all I want is to be close the click is good but to be on the money the digital is used.
  37. Send me an email and I will suggest a possible...

    Send me an email and I will suggest a possible source.
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    A lot of good information given. They are...

    A lot of good information given. They are dragging their feet so far.
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    It's good to see so many folks here having fun...

    It's good to see so many folks here having fun with themselves and sharing the fun. Admitting we are not perfect is a step toward perfection even though none of us will ever get there.
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    Moving air takes more energy than building static...

    Moving air takes more energy than building static pressure. If any motor is running at it's max speed and the system static pressure increases the current draw of the motor decreases because the CFM...
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    I've been driving for 64 years and left my lights...

    I've been driving for 64 years and left my lights on the other day and killed the battery. I called myself a lot of names including DSOB but need to come up with some other descriptive names because...
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    This discussion has been a pleasure Ken because...

    This discussion has been a pleasure Ken because we are discussing the subject. We don't always have to agree with each other on this site because we all learn more by not agreeing than if we always...
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    Your points are valid kdean. My frustration with...

    Your points are valid kdean. My frustration with this subject on this site is there are folks that swear by static pressure measurements and get really angry when I tried to warn them about the...
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    Go to the Titus catalog and select what you want...

    Go to the Titus catalog and select what you want based on CFM, throw and etc.
  45. Replies
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    Please understand kdean as a certified balancer I...

    Please understand kdean as a certified balancer I couldn't simply take a single reading no matter what it was and draw a conclusion about system performance. The problem I see is most HVAC guys have...
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    Pitot traverse if you have a spot. The NEBB...

    Pitot traverse if you have a spot. The NEBB manual is accessible on line and it tells you static pressure is the worst way to try to determine airflow.
    If you need to measure airflow you need to get...
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    Static Pressure Frustration

    Until recently I couldn't understand why there was such a misunderstanding concerning measured static pressures in an air system. I did some research and found that there are a lot of "tutorials"...
  48. Thread: USMC

    by WAYNE3298
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    Happy birthday!!! My best friends 3 sons were...

    Happy birthday!!!

    My best friends 3 sons were jarheads and was he ever proud. I was proud of them also.
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    Yes Poodle unless I was allowed to fix it. ...

    Yes Poodle unless I was allowed to fix it.

    Years ago I did a lot of car work. You would be surprised at how many people wanted me to rig a car up so they could sell it. The same people would bring...
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    I follow your logic Poodle but I couldn't just...

    I follow your logic Poodle but I couldn't just make something work to sell that I knew needed repaired unless everyone involved including the buyer was aware of the situation.
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