RNeumann
Elite Member
One word- heat!
Brushless water pump
- Thread starter RalphVa
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One word- heat!
radios1
Elite Member
you can probably adapt a BLDC motor to replace the brushed motors in the diaphragm pumps.. ElectroCraft : RapidPower™ Brand Brushless DC Motors
OP
RalphVa
Super Member
- Joined
- Dec 19, 2003
- Messages
- 7,885
- Location
- Charlottesville, VA, USA
- Tractor
- JD 2025R, previously Gravely 5650 & JD 4010 & JD 1025R
The new pump with a new marine battery are working fine. Should run for 8 hours, as the battery is 95 amp hour. Very quiet. Will see where the levels in the 3 tanks and 4 barrels connected together end up before one overflows, if that happens before I shut the pump down at about 6 pm. Also pumping into the soaker hoses of garden and raspberry patch.
Each pumping period should give me 3 to 5 days' worth of water by switching among the tanks and barrels.
Ralph
Each pumping period should give me 3 to 5 days' worth of water by switching among the tanks and barrels.
Ralph
radios1
Elite Member
I did find a brushless pump that may be good for what you want!. https://www.walmart.com/ip/Ultra-Qu...shless-Motor-Submersible-Water-Pump/898433292
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RalphVa
Super Member
- Joined
- Dec 19, 2003
- Messages
- 7,885
- Location
- Charlottesville, VA, USA
- Tractor
- JD 2025R, previously Gravely 5650 & JD 4010 & JD 1025R
Won't do 100 ft lift.
Ralph
Ralph
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RalphVa
Super Member
- Joined
- Dec 19, 2003
- Messages
- 7,885
- Location
- Charlottesville, VA, USA
- Tractor
- JD 2025R, previously Gravely 5650 & JD 4010 & JD 1025R
Well, spoke too soon. The pump apparently quit.
I've near a quarter mile of 3/4" poly pipe down to it and haven't used about 1/2 of it for 3 or 4 years (haven't needed it). Found a leak and suspected maybe another; so, cut the line where it ran underneath the tractor crossing and reconnected just before the crossing to the other side.
Then could not get the bloody pump to work. Took it back up here to the house and thought I had it going again. Still would not pump. Going to send the pump back for a refund. Cannot take it apart. The screws have VERY soft heads and use a driver type that I don't have. Loosened all but 3, but they would not budge and rounded them out a little bit. Figured the bigger 3.0 gpm pump would be more foregiving of most stuff.
Got out one of my old (US made Flojet) 1.8 gpm ones. It worked in pumping from a nearly full bucket sitting beside the pump. Took it down, but it would not pump up the approximately 18" to the pump sitting on the tractor crossing. Figure I've a very tiny air leak on the suction side. Will simplify what I have on the suction and try it again tomorrow. Got another old Flojet 1.8 gpm.
Think my neighbor has the right idea. He put in about a 2 or 2 1/2" poly line from the creek up to his house with a motor driven pump, about 50 gpm: MUCH more forgiving a slight leaks on the suction side. Much bigger project.
Ralph
I've near a quarter mile of 3/4" poly pipe down to it and haven't used about 1/2 of it for 3 or 4 years (haven't needed it). Found a leak and suspected maybe another; so, cut the line where it ran underneath the tractor crossing and reconnected just before the crossing to the other side.
Then could not get the bloody pump to work. Took it back up here to the house and thought I had it going again. Still would not pump. Going to send the pump back for a refund. Cannot take it apart. The screws have VERY soft heads and use a driver type that I don't have. Loosened all but 3, but they would not budge and rounded them out a little bit. Figured the bigger 3.0 gpm pump would be more foregiving of most stuff.
Got out one of my old (US made Flojet) 1.8 gpm ones. It worked in pumping from a nearly full bucket sitting beside the pump. Took it down, but it would not pump up the approximately 18" to the pump sitting on the tractor crossing. Figure I've a very tiny air leak on the suction side. Will simplify what I have on the suction and try it again tomorrow. Got another old Flojet 1.8 gpm.
Think my neighbor has the right idea. He put in about a 2 or 2 1/2" poly line from the creek up to his house with a motor driven pump, about 50 gpm: MUCH more forgiving a slight leaks on the suction side. Much bigger project.
Ralph
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RalphVa
Super Member
- Joined
- Dec 19, 2003
- Messages
- 7,885
- Location
- Charlottesville, VA, USA
- Tractor
- JD 2025R, previously Gravely 5650 & JD 4010 & JD 1025R
I've about concluded that diaphragm pumps (did not ever run into them in refinery work I did as a chemical engineer; dealt with pumps a lot) are absolutely no good for drawing UP on the suction side. They're made to suck from gravity tanks that are usually at the same level with liquid higher than the pump until suction is near empty. Also, very clean service: not sucking from a flowing stream.
I got the sorry pump working sucking from a bucket on the pavement and pump elevated in the FEL. Took it down to the stream: NOTHING.
I'll take it apart tomorrow. This US made pump has nice stainless steel screws holding it together, not the very soft metal ones the Chinese one had. (Wife sent it back by UPS today.)
Think what I need is a small reciprocating pump. Don't seem to make any small ones. A small centrifugal would chew up too much battery juice because it would not be very efficient.
Ralph
I got the sorry pump working sucking from a bucket on the pavement and pump elevated in the FEL. Took it down to the stream: NOTHING.
I'll take it apart tomorrow. This US made pump has nice stainless steel screws holding it together, not the very soft metal ones the Chinese one had. (Wife sent it back by UPS today.)
Think what I need is a small reciprocating pump. Don't seem to make any small ones. A small centrifugal would chew up too much battery juice because it would not be very efficient.
Ralph
RNeumann
Elite Member
Your best bet is probably a submersible pump. No vacuum. The little vacuum pumps rely on rubber/neoprene internals (diaphragm or vanes). A submersible doesn’t. Might be time to invert and use 120v pump.
OP
RalphVa
Super Member
- Joined
- Dec 19, 2003
- Messages
- 7,885
- Location
- Charlottesville, VA, USA
- Tractor
- JD 2025R, previously Gravely 5650 & JD 4010 & JD 1025R
Think all submersible ones are centrifugal. The smaller ones (like the ones our the old power steering systems) only do about 30% efficiency. That's about 3 times the amount of juice a positive displacement pump driver would need. The inverter would burn some more juice in losses.
Ralph
Ralph
RNeumann
Elite Member
A diaphragm pump being 3x as efficient as a submersible centrifugal pump simply isn’t the case.