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Vossy1

Post by Vossy1 » Tue Nov 21, 2006 9:39 pm

What an anticlimax tonight has been :cry:

Further trials of the V1 brewery have revealed further problems.

My original totton pump has been quite noisy due to air ingress to the impeller housing. This turned out to be my JG fittings at both the in and out ports on the pump :shock:

I replaced them twice, pva taped them into the screwthread of my tap, but still no joy.

So I got rid and mounted tube direct to pump and tun ports. No more air, but what air was there was already in the pump, led the wife to say....not in this house :cry:

Aha thought Vossy, try the new Totton pump recently purchased on E-bay for a bargain £23.

10 ltr/min, more powerful than old Totton pump....surely there could be no problems........wrong.

This pump is far quieter than my original and doesn't get as hot, but Vossy was thinking the flow rate doesn't look quite right :cry:
The pump has a hydrostatic head of 2m and a flow rate of 10ltr/min.
I was using it at 0.5m....so what flow rate would you expect.....

I disconnected the hose from the return manifold and directed it at tun height into a bucket.

At the very least I expected better flow rate due to no resistance from the manifold.....wrong :evil:

A dreadful 4ltr per min.

This means the V1 brewery is without a pump :cry: :cry:

Back to the drawing board :roll:

All I need now is for Man Utd to lose and my night of misery will be complete :shock:

Back to the second half :wink:

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Andy
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Post by Andy » Tue Nov 21, 2006 9:43 pm

According to the Totton spec you should be getting 8 L/min for 0.5m head.
Dan!

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Post by Andy » Tue Nov 21, 2006 9:47 pm

Oh, and if Utd lose it will be a travesty, they're all over Celtic like a bad suit.
Dan!

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Post by Andy » Tue Nov 21, 2006 10:29 pm

Oops.

:oops:
Dan!

Seveneer

Post by Seveneer » Tue Nov 21, 2006 10:40 pm

Vossy,

if you disconnect the output from the pump but leave the input connected and open does the liquid run through with that type of pump?

When my pumps have failed to prime this has proved to be a sure fire way of helping them to. That said, I've not had any problems with priming since they've been in their current positions.

/Phil.

bod

Post by bod » Tue Nov 21, 2006 11:33 pm

Andy wrote:Oh, and if Utd lose it will be a travesty, they're all over Celtic like a bad suit.


a travesty it is then! :lol: :wink:

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Post by Andy » Tue Nov 21, 2006 11:37 pm

Indeed - every cloud has a silver lining though as I always like to see Utd lose 8)
Dan!

Bigster

Post by Bigster » Tue Nov 21, 2006 11:45 pm

ooooh andy

started watching utd game but switched to the gunners - they do play some loverly stuff. Wish my team could do the same :roll:

Vossy1

Post by Vossy1 » Wed Nov 22, 2006 6:45 am

if you disconnect the output from the pump but leave the input connected and open does the liquid run through with that type of pump?
Yep, did that
make sure there's enough head pressure and run the pump against a shut/partialy shut valve, open and partialy close it a few times (as long as you're fittings are strong enough a centrifugal pump can run against a shut valve as it's designed to create flow and not pressure). If this doesnt work almost instantly this wont be the solution.
Did that too. The tube look like it had sucked a lemon :shock:
This did help to get rid of any remaining air :wink:

I even extended the hose and placed the pump beneath the tun, but to no avail.

My 6ltr/min pump is far more powerful than the 10ltr pump...just too noisy :cry:

And United lost...to a fabulous goal....a gr8 day in the Vossy household :roll:

Seveneer

Post by Seveneer » Wed Nov 22, 2006 10:38 am

I use copper pipe from the mash tun to the pump as I had a problem whith my initial plastic herms whereby the flexible pipe to the pump was sucked closed which is a bad thing. By using copper it fixed the problem.

I included copper for that run in the stainless system and have had no problems.

I use flexible hose from the HLT as there's a good head of water and just an open pipe between the water and the pump rather than 12kg of grain like in the mash tun.

Might be worth trying to cobble together a copper pipe from copper push fit connectors to see if it works.

/Phil.

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Post by Andy » Wed Nov 22, 2006 12:01 pm

All good advice, learnt the hard way! 8)
Dan!

Vossy1

Post by Vossy1 » Wed Nov 22, 2006 7:24 pm

More tseting just completed.

I ran the new Totton pump from reservoir to bucket all at table level with a pre primed pump. I also replaced my reinforced tubing with 1/2 clear tubing.

3 x runs, all at 10-11 ltr per min 8)

I attached the pump to the reservoir and pumped through the heat exchanger to a bucket.

3 x runs, all at 4-5 ltr per :cry:

Opinions please,.....mine...

I think my pumps under rated. I don't think it can provide the force to make the flow increase through the 10mm bore heat exchanger.

I'm not sure what sort of litreage per min I need, but I know I need a pump with more power.

I know there is a way of working out the max flow from a tube of this bore, anyone know how to do it or what it is :?:

Does anyone have any suggestions....7 :?

Vossy1

Post by Vossy1 » Wed Nov 22, 2006 8:01 pm

I've just tested the 6ltr/min pump and it produced an output of....6ltrs with both free flow and heat exchanger.

It's odd that the smaller rated pump outdoes the higher rated pump.

Both pumps have a max pressure of 1.4 bar and I think this is the stumbling block.

I suspect I need a higher working pressure on my pump.

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Post by Andy » Wed Nov 22, 2006 8:08 pm

Vossy1 wrote:Both pumps have a max pressure of 1.4 bar and I think this is the stumbling block.

Doubt it Vossy - my Totton NDP35 has the same 1.4bar rating on the pump body, I think that's all about the max pressure that the body itself can withstand. The NDP35 is rated at nealy 30L/min with a 1 metre head, shame the Ebay seller I got mine from doesn't have any left :(
Dan!

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Post by Andy » Wed Nov 22, 2006 8:11 pm

Dan!

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