Pump. Centrifugal??

[edit1now]

They're very nice

I was wondering about making a splash shield for mine - a piece of curved metal or plastic about half an inch away from the worrying bits, possibly a cut-down from a cheap stainless jar. If I ever got around to installing the brewing stuff on a trolley then the pump would go safely under a shelf.

[Talisman]

Cheque was posted at lunchtime on Wednesday . . . pump was on my desk at 10:00 on Friday.

Initial thoughts were that the thing just wasn't 'finished' . . . of course I have been rather spoiled with the RG550 which is built like a brick sh*thouse. While I have splashed wort and water around and over the RG550 there is no way I would do so with the March may 809 . . . a very exposed motor coil assembly for one thing . . . . Be interesting to see what its like when powered up and rocking

Snap, cheque sent Thurs. Pump arrived Friday.

When its up and running i think ill have to make a splash guard around it.

What fittings go onto the threads to attach pipe?

Thanks all

[edit1now]

1/2" NPT (American) but put some PTFE tape on it and British 1/2" BSP fittings will work fine as they're the same number of threads per inch

[Aleman]

I've bought 1/2" Female -> 15mm bent Compression fittings for mine . . . . I'm wondering about using liquid PTFE on my threads rather than tape . . . although the instructions do say for 'metal' joints

[edit1now]

I've never used liquid PTFE but I can't see why it shouldn't work

[Bru4u]

The March May are great pumps, I got two, don't run them dry, open the valves to flood them first and then switch on, you can then close the outlet valve as much as you like, a centrifugal pump can be started with the outlet shut so long as it's primed, and are not great at self priming, this is how we had to start larger versions (180,000 Ltr/Hr), it means the pump is started off load. but leave the outlet shut too long and it will overheat. Don't even think of doing that on a positive displacement with no relief V/V.
And 1/2" BSP with a small amount of Plastic Tape For Engineers (PTFE)
Bru

[Talisman]

ok thanks

[greenhouseuk]

You might like to consider ESSKA pumps from Germany.

This range of centrifugal, self-priming, food grade pumps can deal with temperatures up to 90`at come in at £94 when P&P has been added.

http://www.esska-tech.co.uk/cgi-bin/ess ... 9430000005

Jim

[edit1now]

Unfortunately your link says "session expired" - which of the Esska pumps did you mean?

[greenhouseuk]

Sorry - I am also failing to get my message across on the seperate Novax Pump string....

Try

http://www.esska-tech.co.uk

then follow Various Pumps - Centrifugal Pumps - Centrifugal Pump Series Novax-M Stainless - Food Grade

[edit1now]

OK so if you look at the PDF here, and scroll down to page 3 where the English section starts, you'll see that the max liquid temperature is 35°C. Less good for hot wort?

[greenhouseuk]

I can see exactly what you have spotted, however on the same website in the description it says;

"The optimum temperature for the medium, the pump is working properly is 35 ° C. The maximum mechanical medium temperature is 60 ° C."

And I specifically asked the manuafacturers via email and was informed that this would run at 90`C although they recommended flushing through with cold liquid after use at this temperature.

On the Novax thread there is mention of a "Viton" gasket which apparently resolves this issue.

[greenhouseuk]

Having looked into this the Viton seals are only available for the higher spec pumps (M-20 and M-25) rather than the the cheaper M-10.

[greenhouseuk]

For the record I went for Novax-M-20 with the Viton manifold (making it full heat resistant) from a German website - Weinbau24 for £120.

This is a quite sophisticated and large food grade self-priming (Centrifugal) pump. The inputs / outputs are either hose diameter 20mm or tap thread 3/4".

The 3/4" tap thread has entered me into a whole world of brass Hozelock fittings and 15mm silicon tubing combinations.