I'd like to make a correction. The impellers in the vertical pumps for municipal and industrial water (Goulds, Franklin, whatever....) are colleted (attached) to the pump shaft. The impellers do not freely "float" inside the diffuser. By being attached to the shaft, the impellers move with the pump shaft and the thrust is therefore transferred to it. If you were sizing up a line shaft, you should be concerned about up thrust and make sure your surface motor have a correct bearing to handle that thrust. If you were dealing with a submersible electric motor pump, you should be concerned about down thrust and make sure the motor bearing can handle it. Although not recommended, these pumps are well suited for down thrust operation (as they are usually considered to be operating on some sort of down thrust).
I've been told it's a good idea to perform a couple of holes in the non return valve ball to allow the water column to leak down and make pulling out the hose easier if need be... What's your opinion ?
Thanks for the great videos. I have a 20-year-old submersible pump (100 feet) that hasn't been turned on for 10 years. Should I just try to turn it on, or should I remove it and take it to maintenance or just replace it? It would be great to have your advice.
Miguel, I would try turning it on before you pull it. It's going to get the smoke test either way, at least if it works you don't have to go through pulling it and setting it again.
I never understood the up and down thrust. Thanks this helps a lot. I’m currently in the process of putting in a pump in my new well. It’s a 30gpm well at 280ft. But I’m setting the pump at 260ft and went with a Goulds 18gs20, so 2 hp, 18gpm ideal rating. But was told with the water static being at roughly 50ft below surface, I will have more than 18gpm flowing into my holding tanks. Do u think this pump is sized right for my well? Will it be a problem for the pump if it’s flowing say 22gpm-25gpm instead of the 18gpm? If so maybe I can swap the pump for a 25gs20, so 2hp 25gpm. Please help me out if u can. Thanks
I'd like to make a correction. The impellers in the vertical pumps for municipal and industrial water (Goulds, Franklin, whatever....) are colleted (attached) to the pump shaft. The impellers do not freely "float" inside the diffuser. By being attached to the shaft, the impellers move with the pump shaft and the thrust is therefore transferred to it. If you were sizing up a line shaft, you should be concerned about up thrust and make sure your surface motor have a correct bearing to handle that thrust. If you were dealing with a submersible electric motor pump, you should be concerned about down thrust and make sure the motor bearing can handle it. Although not recommended, these pumps are well suited for down thrust operation (as they are usually considered to be operating on some sort of down thrust).
I've been told it's a good idea to perform a couple of holes in the non return valve ball to allow the water column to leak down and make pulling out the hose easier if need be... What's your opinion ?
thanks for explaining, this is very helpful for my thesis
Glad it was helpful!
Thanks for the great videos. I have a 20-year-old submersible pump (100 feet) that hasn't been turned on for 10 years. Should I just try to turn it on, or should I remove it and take it to maintenance or just replace it? It would be great to have your advice.
Miguel, I would try turning it on before you pull it. It's going to get the smoke test either way, at least if it works you don't have to go through pulling it and setting it again.
thanks for your answer. I'll give it a try.
@@miguel1437 How did it go? :D
I never understood the up and down thrust. Thanks this helps a lot. I’m currently in the process of putting in a pump in my new well. It’s a 30gpm well at 280ft. But I’m setting the pump at 260ft and went with a Goulds 18gs20, so 2 hp, 18gpm ideal rating. But was told with the water static being at roughly 50ft below surface, I will have more than 18gpm flowing into my holding tanks. Do u think this pump is sized right for my well? Will it be a problem for the pump if it’s flowing say 22gpm-25gpm instead of the 18gpm? If so maybe I can swap the pump for a 25gs20, so 2hp 25gpm. Please help me out if u can. Thanks
Thank You
You're welcome
Informative. Thanks
Glad it was helpful!
You have a mistake in the spelling of “Down Thust”
Wow, I can't believe we didn't catch that... Good eye! :)