SS Boilers

The forum for discussing all kinds of brewing paraphernalia.
Post Reply
Vossy1

Post by Vossy1 » Wed Nov 22, 2006 8:16 pm

Think I've grasped it now whilst you were posting Andy.

It's not the working pressure I should be looking at it's the hydrostatic head.

On the graph for my pump DC15/5 I'm getting a flow rate of 6ltrs per min which equates to a hydrostatic head of 5meters...ish.

My pumps only rated to a 6m hydro head.

I'm assuming a pumps power is measured via the HH :?:

Sound o.k :?

Vossy1

Post by Vossy1 » Wed Nov 22, 2006 8:29 pm

Hi DaaB and thanks.

You can soon find out, remove any restrictions from the outlet and conduct the test (sparge arms/return manifolds?). If you are getting the required flow rate, thats you problem.

Did that, see above

The heat exchanger is providing resistance to the pump and I need to find a way of increasing the flow.

If my set up is generating a HH resistance of about 5m then if I target a pump with a certain flow at 5m HH will that do the job....is that sensible logic.

Andy, strangely I e-mailed the Harmony Hut a couple of hours ago regards that pump 8)

EDIT

Just tried both pumps pushing liquid through my cfc and same effect, with a rough 1 ltr/min drop on both pumps.

User avatar
Andy
Virtually comatose but still standing
Posts: 8716
Joined: Fri Nov 18, 2005 1:00 pm
Location: Ash, Surrey
Contact:

Post by Andy » Wed Nov 22, 2006 9:44 pm

DaaB wrote:(imagine an H shaped manifold with the flow coming in at the center through a tee and at the end of the long sides of the H are 4 elbows facing up through which the wort is returned to the mash).
That's Phils return manifold that is 8)
Dan!

Vossy1

Post by Vossy1 » Wed Nov 22, 2006 9:48 pm

That's Phils return manifold that is
Beat me to it :D

The pump from the Harmony Hut looks ideal depending on model variant.

DaaB, based on my cfc experiment above, and my other follies, it's the heat exchanger that's providing the resistance.

I don't fancy changing that, and 7's 10mm HE works for him so it's the pump that's got to change....I think :idea:

Vossy1

Post by Vossy1 » Wed Nov 22, 2006 9:53 pm

Well Paul from the Harmony Hut has just got back to me and the pump is a March May MSP3.

http://www.marchmay.co.uk/files/Msp.pdf

Looking at it's HH flow rate graph it looks perfect.

Vossy1

Post by Vossy1 » Wed Nov 22, 2006 10:00 pm

Thanks for all the help DaaB and Andy....once again 8)

Seveneer

Post by Seveneer » Thu Nov 23, 2006 11:14 pm

I've been away for a couple of days. Is it all sorted now then Vossy?
/Phil.

Vossy1

Post by Vossy1 » Thu Nov 23, 2006 11:54 pm

Hi Phil, Not yet.

New pump on the way, fittings, tubing and a whole lot more patience :wink:

On a positive note, at least I've got 2 seperate pumps now 8)

User avatar
Andy
Virtually comatose but still standing
Posts: 8716
Joined: Fri Nov 18, 2005 1:00 pm
Location: Ash, Surrey
Contact:

Post by Andy » Fri Nov 24, 2006 12:08 am

Keep the faith Vossy, nearly there! :D
Dan!

Seveneer

Post by Seveneer » Fri Nov 24, 2006 12:18 am

I've been thinking. You have a flow rate of 4l per minute through the heat exchanger, is that right? I would have thought that would be just right. You don't want to draw too much or you'l compact the mash.

I reckon I probably have about the same, maybe a little more.

Vossy1

Post by Vossy1 » Fri Nov 24, 2006 12:25 am

One pump produced 4ltr per min, the other 6ltr per min, both through the heat exchanger.

My wife said the 6ltr pump was too noisy to use in the house for hours at a time :cry:

The 4ltr pump produced too widely varying heat changes :!:

Seveneer

Post by Seveneer » Fri Nov 24, 2006 12:40 am

I wouldn't be concerned about the flow through the heat exchanger particularly but the noise is probably air as previously discussed. Be interesting to see how the new pumps work out.

Let us know how you get on. I'm starting to think that I got very lucky with the pumps I found.

/Phil.

steve_flack

Post by steve_flack » Fri Nov 24, 2006 9:26 am

Vossy1 wrote: New pump on the way, fittings, tubing and a whole lot more patience :wink:
Is that the March May one the Harmony hut guy had? From the pics I've got one just like it but haven't tried it out yet.

User avatar
Andy
Virtually comatose but still standing
Posts: 8716
Joined: Fri Nov 18, 2005 1:00 pm
Location: Ash, Surrey
Contact:

Post by Andy » Fri Nov 24, 2006 9:34 am

Dan!

steve_flack

Post by steve_flack » Fri Nov 24, 2006 9:38 am

Mine's similar but different - mine has a white tubular thing on top. That's a pretty good price for a pump...I'm tempted to get a spare :wink:

Post Reply