Bio-proof non-return valve?

[julianf]

Hello,

Im after a NRV for my bio storage tank.  It will always be submerged in bio.

The one that ive just purchased (for something else) has a disc of red 'rubber' type stuff on it, that i expect to be unsuitable for bio.  This is the one i just bought -



(but, as i say, it was more for the strainer than the valve, and it will be for veg anyhow)


Anyhow, can someone recommend me one for use with bio?

[Tony]

Would it be possible to replace the disk with something else?

Mind you it might be fine as is - I had a NRV (only 8mm though) on the car and that was fine, it had a similar red material.  Mine stopped working as it got a lump of rust jammed in it (it was before the car's filter).

[nigelb]

Why don't you just put the one you've just bought in a jar of biodiesel and see what happens to it. It's that simple.

Nige

[julianf]

Im not intending to use the one ive just purchased for bio.  So, if i run a 'test' on it, and it fails, ive done for that one too : (

I recon the disc could be replaced, but i have nothing suitable here, and dont want the bother on a part that i want to use in the very near future.

I would consider buying another the same as above to run a test on, and then replace the seal if needed.

[julesandtash]

I have a standard brass one from BES which has been submerged in my bio storage tank or the best part of three years and still works.

Part number 7524 for 3/4" inch BSP female or 7525 for one inch BSP female



I dont have a strainer on mine, rather I have a BSP male to compression elbow screwed into the end which then has my floating pickup attached. The check valve lives at the bottom of the tank and, other than getting a bit of a green coating, has never been a problem.

[julianf]

Thanks Julian - thats spot on the the information that will sort me out.  Ill add one to the next order (i only received a package from bes a couple of days ago!)

[Tony]

How easily does it open? I'm wondering if it would be ok in my fuel system, as I've removed the Delica's stock filter which incorporates one in the priming head. Now my fuel drains back to the tank when parked up.

[julesandtash]

Quite easily - I could blow through it with my mouth. As far as I am aware, human lungs can only generate 1 or 2 psi so therefore not a lot of pressure difference needed to open it.

[Tony]

 

Quite easily - I could blow through it with my mouth. As far as I am aware, human lungs can only generate 1 or 2 psi so therefore not a lot of pressure difference needed to open it.

Thanks Jules, sounds ideal.

[nathanrobo]

Ref the BES check valve, anyone know where I can get one with a basket strainer?

[1958steveflying]

Hello,

Im after a NRV for my bio storage tank.  It will always be submerged in bio.

The one that ive just purchased (for something else) has a disc of red 'rubber' type stuff on it, that i expect to be unsuitable for bio.  This is the one i just bought -



(but, as i say, it was more for the strainer than the valve, and it will be for veg anyhow)


Anyhow, can someone recommend me one for use with bio?

Where did you get this one from Julian ?

[Tony]

What's it for?  WVO collection or fuel system?

I've got this in my fuel system now with a separate course filter before it:



But if you were after a pump footer with valve this would be the kind of thing to use:

http://www.ebay.co.uk/itm/3-4-BSP-PUMP-CHECK-FOOT-VALVE-STRAINER-NON-RETURN-NEW-/190391382609

For WVO use though I would say the mesh blocks easily unless the oil is stood for a while first so sediment drops out.

[1958steveflying]

What's it for?  WVO collection or fuel system?

I've got this in my fuel system now with a separate course filter before it:



But if you were after a pump footer with valve this would be the kind of thing to use:

http://www.ebay.co.uk/itm/3-4-BSP-PUMP-CHECK-FOOT-VALVE-STRAINER-NON-RETURN-NEW-/190391382609

For WVO use though I would say the mesh blocks easily unless the oil is stood for a while first so sediment drops out.

Hi Tony, I have the one in your ebay link and want a course one like Julians, it's for transferring wvo. The Ebay one blocks with suspended grit that wont drop out from some places.

[nathanrobo]

Steve is doing things slightly different... But when I get my processor back (or build a new one), I'm thinking of a flat 205 litre tank that I have with an immersion heater in it.  Just dump the feedstock in unstrained, then heat and pull up with a self-priming pump using a foot valve with a strainer (so as not to hurt pump).  With the oil at say, 70 deg, I could pump the oil into the processor.

If the strainer gets a bit blocked, it would be no big deal with the oil being very thin / hot

[nathanrobo]

http://www.ebay.co.uk/itm/3-4-BSP-PUMP-CHECK-FOOT-VALVE-STRAINER-NON-RETURN-NEW-/190391382609

That'll do me!