Moving less water with a Taco 007

cheapsx said:

I have 3 of these pumps (gotten for free) and need to move less gpm's from the wood boiler to the load pump and storage when hooked up. I know, i know... I should get the right size pump for the head loss but these were FREE. Two options I think. One- choke down the inlet and outlet to maybe .75" instead of the 1" hole or, two- cut off 4 of the 8 blades on the impeller of the pump. What option do you guys think would give the desired effect? I have about 3.5' of head loss and need to move 8-10 gpm. The right pump would be a 005 or 006 has anyone been inside those and if so what do they do different?

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Typically from boiler to storage is one circuit and storage to load is a completely separate circuit.

With good return temperature protection I guess I don't see the downside of having plenty of flow on the boiler to storage circuit since the net flow to storage will be determined by the return temperature protection end of it.

But if you do need to restrict flow on a permanent basis and you would be worried about wearing out a partially open ball valve, you might try finding an old swing check valve with accessible guts that you drill holes in the plate, or replace the plate until you found the right restriction. With a check valve housing you could get in there to change the flow without a lot of fuss.

Given a choice I would think the restriction should be on the discharge side.

cheapsx said:

I have an old smoker and don't have return protection.

Now with no storage where the taps are for the tank (just prior to the load pump) I have feed tied back into the return.

The wood boiler is just pushing through that loop and the load pump draws from that.

I also have the supply teed to the return by the boiler so I can send some hot water back there if I want.

I have put this together to have the storage but not enough $$ yet to finish it.

I thought that reducing flow may keep me from having to buy a danfoss valve.

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I tried to draw a schematic from what you're describing and didn't get very far. Any kind of sketch would help a lot in enabling anyone to offer useful assistance.

--ewd

I use a slide switch from home depot it is used to control the speed of a ceiling fan.

http://www.homedepot.com/Electrical...Id=10051&catalogId=10053&superSkuId=202995054

I have used these for 3 years with no problem on taco pumps. I asked taco and they said they would be fine.

Rob

I have used them of grundfos and also a electric motor I was using for a wire wheel.


Rob