martinworswick

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there is a march pump for sale on an auction site in n.z., its magnetic drive and pumps approximately 300gph or 20 quart per min at 1ft head
could i slow this down suuficiently with a ball valve to fit my still under construction 10gal system or has it got too much grunt?
what do you think?

martin

Catt22

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That's only 5 gpm which isn't really a whole lot. The common March 809 pumps are rated at 4-5 gpm @ something around 4.5 ft of head. That's a higher output than the one you are looking at. You should have no problem slowing it down if necessary with a valve on the output side.

Sawdustguy

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If this is a March 809 pump it has a magnetic drive and the flow can be slowed down with a valve. There are some March Pumps that do not have magnetic drive. The March 809 is good for 5 GPM and 4.5' Head.

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Guy

Brewery URL: Black Dog Brewery NY

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martinworswick

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March BC-2CP-MD Pump

March BC-2CP-MD Pump for sale - TradeMe.co.nz - New Zealand

this is the pump code and the link to the auction, its not an 809(got a quote for 800nz$ over here!) but the seller says its magnetic drive.

Sawdustguy

Recipes 

This pump should work. It is recommended for A/C units. It is a Seal-less magnetic drive pump that is submersible. It has an Inlet 3/4" male x 3/8" female but the Output is only 1/4" male. Not the best choice because of the 1/4" output.

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Guy

Brewery URL: Black Dog Brewery NY

BBQ Team URL: Two Fat Polocks BBQ Team

Whiskey

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If that pump only has 1' of head you do not want to get it, unless your system is all on one level. A pumps head rating is how much fluid it can pump vertically strait up through a nominal sized tube (1/2" etc). That pump will not fit our needs.


EDIT: Just for comparison, the March 809-PL-HS that most of us have and the one carried by most Homebrew shops is 6gpm and has 12 ft of head.

EDITX2: from this link, http://www.march-pumps.net/0125-0109-0100.html the Pump is rated for "about 5.5 GPM and 13.5 ft of head" that would be enough.

The only question is what material is the head assembly made of and what tempuratures can it handle.

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Csuho

Recipes 

that pump looks to be the 1 I have and the temp rating is like 190 F which should be fine just wait a few mins after killin the heat and you'll be ok if your using it for a counter flow or chill plate if not I honestly dont see a problem using it vs the 809.

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Catt22

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The pump temp ratings aren't critical for this application. The max temp specifications are related to the line pressure that these pumps are designed to operate with. IOW, the composite plastic pump housings loose strength at higher temperatures. We typically operate these pumps at only a few psi. These pumps are often used to circulate hot water in a closed system where line pressures can reach or exceed 125 psi and the strength at both high temps and high pressure is critical. The pump housing won't melt at boiling temps, but it will lose some strength.