nostalgia
Well-Known Member
No, this isn't posted in the wrong forum you sicko Although this is as much brew science as equipment, I guess.
ANYway, I use my March 809 to pump into my MLT from the bottom - in other words when filling the MLT with hot liquor, I use the outlet as the inlet and the water pumps in through my braid.
It works great, but now I'm designing a new (and larger) brewhouse, so I'm curious about whether this will continue to work as the volumes get larger.
The max head for an 809 is listed as 4.3 feet. What I'm curious about is how the weight of the liquid *above* the end of the hose factors in. I see two possibilities, but I don't know enough to know which is correct:
1: It's just inches of liquid above the hose. E.g. if my MLT's inlet is 3 feet above the pump and there's 6" of water in the MLT, the pump sees a head pressure of 3' 6".
2: The surface area of the water matters, as there will be more water for atmospheric pressure to push down on.
There has to be a point where the pump can't overcome the pressure of the water above it. But if #1 is correct, it won't matter if I pump from the top or the bottom, meaning I need fewer connections.
Thanks!
-Joe
ANYway, I use my March 809 to pump into my MLT from the bottom - in other words when filling the MLT with hot liquor, I use the outlet as the inlet and the water pumps in through my braid.
It works great, but now I'm designing a new (and larger) brewhouse, so I'm curious about whether this will continue to work as the volumes get larger.
The max head for an 809 is listed as 4.3 feet. What I'm curious about is how the weight of the liquid *above* the end of the hose factors in. I see two possibilities, but I don't know enough to know which is correct:
1: It's just inches of liquid above the hose. E.g. if my MLT's inlet is 3 feet above the pump and there's 6" of water in the MLT, the pump sees a head pressure of 3' 6".
2: The surface area of the water matters, as there will be more water for atmospheric pressure to push down on.
There has to be a point where the pump can't overcome the pressure of the water above it. But if #1 is correct, it won't matter if I pump from the top or the bottom, meaning I need fewer connections.
Thanks!
-Joe