Quick release couplings?

[K.H]

Im looking for a quick release coupling that shuts the flow off when disconnected, these look like they may be suitable but im not sure that they shut the flow off, any opinions?

 http://www.ebay.co.uk/itm/MACDONALD-Male-Female-Hydraulic-Quick-Release-Action-Coupling-Type-HF-/130831671887?pt=LH_DefaultDomain_3&hash=item1e762ce24f&_uhb=1

[Dickjotec]

Think those will do. Hydraulic couplings have to seal but don't know if the seals inside will be bio proof.
Dick

[K.H]

Cheers Dick, only for WVO transferring so think i will buy some

[Rotary-Motion]

there about 10mm ID going by tape measure

[Rotary-Motion]

hmm i see now cant leave pipe on.......

[julianf]

i dont know if you got them, but im pretty sure the iso ones seal on both sides -

http://www.ebay.co.uk/itm/Hydraulic-Quick-Release-Coupling-1-2-BSPP-ISO-A-FF-/270786588590?pt=LH_DefaultDomain_3&hash=item3f0c236fae

i have a set (somwhere) but ive never put them into service, and cant recall the exact details. 

theyre not too expensive for smaller bores.

[julianf]

Some of these -

http://www.oilybits.com/hose-couplings-reels/hose-connectors/cam-and-groove-couplings/prod_290.html

and some full bore butterfly valves (which are often real cheap at BES) may work out better for preserving the bore / flow ?

possibly cheaper too, if a little more awkward to use?

[Tony]

The oilybits ones are good prices but the only metal ones are Aluminium?  I'd love to have some quick release connectors but they're just so expensive...

[julianf]

The fear of aluminium =- aren't all the spin on filter heads (in landrovers etc) all aluminium?

Or were you wanting them for bio processing (where the caustic will be present?)

[Tony]

The fear of aluminium =- aren't all the spin on filter heads (in landrovers etc) all aluminium?

Think Bosch IP body is ally too.  I think this is why we like to remove all the Methanol before it gets to the car.

Or were you wanting them for bio processing (where the caustic will be present?)

Mostly for WVO/bio transfer in my case.  Maybe it's not such an issue for this?

[julianf]

Im sure its just a slip up, but its the caustic that does for ally, not the meth.

I realised quite how it reacted with some metals, when i got a trace amount on some galvanised.

My personal suspicion is that well made bio has very limited caustic in it - of course, this is whats being titrated for by the acid wash method.

I (personally) would have no issue using the fittings for bio transfer - indeed, you could look at is this way - an early warning system for if your bio is still reactive!

[Tony]

Im sure its just a slip up, but its the caustic that does for ally, not the meth.

I'm sure that's true too, but Methanol strips off the oxide layer on Aluminium, which then allows the surface to oxidise further with any dissolved oxygen (and Methanol acts as an oxidising agent too). 

Methanol and Aluminium are not buddies

[julianf]

...you learn something new every day! : )

[Tony]

Watch this... if the installers of the aluminium-finned flame arrester had known it, then two of the chaps fitting the roof may not have died.

https://www.youtube.com/watch?v=yYgJcnzr_2k

Scary stuff!

[Julian]

Im sure its just a slip up, but its the caustic that does for ally, not the meth.

I'm sure that's true too, but Methanol strips off the oxide layer on Aluminium, which then allows the surface to oxidise further with any dissolved oxygen (and Methanol acts as an oxidising agent too). 

Methanol and Aluminium are not buddies

We went through this on the VOD.  I got info from my mate (yes Keith I do have a few!) with a PhD in chemistry who advised that the effect was at a microscopic level.  It would take years for Methanol to have a serious effect on anything of reasonable thickness.