Russian diaphragm pump( no motor,no bearings)

I present you a verry cheap water pump with diaphragm but unlike manny otther bigger diaphragm pumps ,this has no motor,no bearings so much less moving parts and no friction .
Its just a big electromagnet that makes this pumps work and its also the most efficient at electric power consumption.
They work usually up to 90 meters deep,cost between 25- and 100 dollars new.
But there are manny chinese copyes of lower quality because somme chinese manufacturers use aluminum wiring for the coil ( also in USA this is a verry widespread technique) because aluminum wire its much cheaper than copper wire.
Because the coil of the pump is from aluminum and the cable that feeds the current its from copper ,there are somme connexion problems over time because the oxides that form between the different metals are electrical i sulators and they can interrupt the circuit.

The pumps are rugged made of thick metal, compact and heavy and altough they are cheap ,the postage would probably cost more than the pump if shipped in a western country.

I find is to best design of a moderatly deep well compared to any otther pump that has a motor with bearings,oil sealed etc.

The pump from my 35 meters deep well is like this and was in continuous use non stop ( not in my well but in otther well) for 35 years.
I bought it because the cable started to rot,changed the cable, restored the pump ( couldnt unsrew the pump because the screws were rusted so i let it as it is in the interior) and it continues to work.
Similar used pumps that are original soviet made sold here for 500 dollars and i prefered to pay more on a 35 year old pump but russian made than the cost of a brand new and identical chinese pump wich i had one before that failed after a year because of the aluminum coil.

Draws just 200 watts and has a flow of 10-20 litters per minute (2,5-5 gallons/ min) from up to 90 meters deep.

Thanks! Now I know what I missed to buy… a soviet model for 2000 RUB. The next time I see one it gets bought.

Sebastian Köln wrote:Thanks! Now I know what I missed to buy… a soviet model for 2000 RUB. The next time I see one it gets bought.

They still make these pumps in Russia and i found a video presentation with the factory making of the pumps.
However,i dont know russian language and couldnt see the price they sell them .
Ukrainean also make them,they are called Bosna pumps and they are @ 50 euro one but at that price doesnt seem trusty ( could be made in China and sold as Ukrainean).
Russian original ones are the Kalashnikovs of the well pumps.Simple,robust and reliable to work for decades in use.
I buyed the old one because it was original but i would have bought a brand new one if i could have find it original.
The video shows the russian factory and how they make them.

Because i have a deep well ,over time i managed to destroy quite a few pumps( 14 is only what i know of).
Ive had mostly expensive german pumps and a few expensive romanian and 2 cheaper ones chinese( one with screw and one copy of the russian pump).
Because soo manny pumps have failed,at somme point we made a really dangerous contraption : a thick steel barrel of 100 litters with a steel rope on a spool .
We lowered that heavy barrel slowly ,by using a brake pad on a lever ( braking the descent by hand pressure).
When it reached the water we wait until we heard it bubbling ,then we put a bolt safety into the spool and press a button wich started a triphasic motor through a gear reductor to lift the barrel .It took a few minutes to came to surface.
The stoping of the barrel was made by hand by pressing a button to stop the motor.
I have a bad picture ive taken pictures of it but you can see the heavy red barrel.
When the barrel went down ,the whole suport of the contraption would shake vigurously .

Mihai Ilie wrote:They still make these pumps in Russia and i found a video presentation with the factory making of the pumps.
However,i dont know russian language and couldnt see the price they sell them .
Ukrainean also make them,they are called Bosna pumps and they are @ 50 euro one but at that price doesnt seem trusty ( could be made in China and sold as Ukrainean).
Russian original ones are the Kalashnikovs of the well pumps.Simple,robust and reliable to work for decades in use.

I actually bought a new one made in Russia for ~30€ which has been used occasionally since. (now sitting in the well I am working on…)

Mihai Ilie wrote:They still make these pumps in Russia and i found a video presentation with the factory making of the pumps.
However,i dont know russian language and couldnt see the price they sell them .
Ukrainean also make them,they are called Bosna pumps and they are @ 50 euro one but at that price doesnt seem trusty ( could be made in China and sold as Ukrainean).
Russian original ones are the Kalashnikovs of the well pumps.Simple,robust and reliable to work for decades in use.

I actually bought a new one made in Russia for ~30€ which has been used occasionally since. (now sitting in the well I am working on…)