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Biodiesel => Chemistry and process => Topic started by: photoman290 on August 27, 2013, 02:20:52 PM

Title: one for the pump gurus
Post by: photoman290 on August 27, 2013, 02:20:52 PM

i am building a filter that needs an overflow to relieve pressure on the system if the filter gets blocked. the idea is to have a tube just under the filter mesh with a tube to the outside world that the excess oil will flow up if the filter gets blocked. according to the name plate the head of a tam 105 is 35metres. of course i cant have a tube that long. i have had a quick look at some sites to try and calculate the length of tube i need but haven't got very far.
some rough figures of the setup. 200 litre drum with the pump on the top. pump inlet in the drum about a foot from the bottom of the drum. filter inlet around one foot higher than the drum  filter relief pipe 6 inches higher than the inlet. filter outlet a couple of inches higher than the relief pipe. all the pipework is 15mm.

anyone give me an idea of how long i need the relief pipe?

Title: Re: one for the pump gurus
Post by: therecklessengineer on August 27, 2013, 05:53:09 PM

You need one of these:

http://www.ebay.co.uk/itm/Pro-Auto-Bypass-Valve-22mm-By-Pass-Valve-/261100019071?pt=UK_DIY_Materials_Plumbing_MJ&hash=item3ccac61d7f (http://www.ebay.co.uk/itm/Pro-Auto-Bypass-Valve-22mm-By-Pass-Valve-/261100019071?pt=UK_DIY_Materials_Plumbing_MJ&hash=item3ccac61d7f)

Adjustable from 0.1-0.5 bar.