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Old 09-04-2012, 08:27 AM   #1
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Default How many pumps ???

Posted this in the Beginners section yesterday but maybe this isa a better place.

I'm a lapsed brewer and have just gotten the bug again after 10 years. I am in the process of putting together an electric HERMS system and have been checking out various schematics.

I've seen systems with 1, 2 and 3 pumps. How many pumps would be optimal? I want to keep it simple so I'm inclined to go one pump.

Could anyone point out the pro's and cons ?


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Old 09-04-2012, 01:07 PM   #2
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3 tiers - no pumps
2 tiers - 1 pump
1 tier - 2 pumps
Can't find a use for a third pump


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Old 09-04-2012, 01:21 PM   #3
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Thanks mpcluewer, that makes perfect sense.

I'm doing a single tier system and wondered whether, with the right combination of valves and plumbing, I could not get away with one pump ?

I'd like to understand why are 2 pumps preferable?
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Old 09-04-2012, 01:32 PM   #4
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For a HERMS system, you need one pump to be used to constantly circulate the wort through the heat exchanger. You can use the other pump to recirculate the water in the HLT to prevent stratification.

When you start to send the wort over to the kettle, you use one pump to transfer to kettle and the other pump to move the sparge water from the HLT over the top of the grains in the MLT.
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Old 09-04-2012, 01:39 PM   #5
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Great, now I understand.

Thanks guys !!!!
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Old 09-04-2012, 02:04 PM   #6
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Quote:
Originally Posted by mpcluever View Post
3 tiers - no pumps
2 tiers - 1 pump
1 tier - 2 pumps
Can't find a use for a third pump
Have to modify this to include the possibility for batch sparging.

3 tiers no pumps no matter what.
2 tiers - 1 pump
1 tier - 2 pumps to fly sparge, 1 pump to batch sparge.
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Old 09-04-2012, 02:21 PM   #7
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Thanks Bobby. I should also point out that once you go above 5 gallons with a 3 tier system, unless you have a burner on the top tier for the HLT, you may need to heat water in the BK and then pump up top as lifting 5-7 gallons of 180 degree water can be very dangerous.
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Old 09-04-2012, 04:21 PM   #8
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I just use one pump on my keggle system and accomplish a relatively decent fly sparge by simply pouring the water over the mash paddle as the pump pushes the wort from the mash tun to the boil kettle. Two pumps would be nice though
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Old 09-05-2012, 03:49 PM   #9
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I have 3 pumps on my HERMS system. I use 1 pump to recirculate water through the HLT to get nice even heating.
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Old 09-05-2012, 03:54 PM   #10
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Quote:
Originally Posted by mmmbeer View Post
I have 3 pumps on my HERMS system. I use 1 pump to recirculate water through the HLT to get nice even heating.
What are the other 2 pumps doing during that time? I understand using a pump to recirc the HLT and another to pump wort through the coil, but can't think what the 3rd pump would be doing.


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