Quick releases and / or valves - are they OK to use?

[contiki]

HI,

I was just wondering whether quick release fitting like these http://www.candccentral.co.uk/acatalog/Quick_Couplings.html
Or valves like these http://www.candccentral.co.uk/acatalog/Ball_Valves.html
Are big no-no in terms of flow restriction.

The reason to use them seems obvious – ease of maintenance but I have not seen them mention in the stickies or by people describing their setups

[Navanod]

I'm very interested in this too as I have used some in the past but had never noticed much restriction...

[Grafton]

the "quick release" page that you linked too looks like a bunch of air hose couplings one side doesn't have a valve and would leak like crazy unless these are somehow different also, the regular ones for air leak and badly after a while, also the opening for the male disconnect looks like it has an id of less than a 1/4 in like the air versions

i'd almost bet money that they were polished up are connections, but they may possiblely be different

[silverphoenix]

Those will work but they do constrict inside. If you want quick disconnects use Colder brand quick disconnects.

[kemist]

Even the colder quick disconnects that are not no spill, the least restrictive straight through kind, are pretty restrictive. I remember looking it up and i believe it was like adding a maze 4 per coupling. The no spill kind murder flow.

[Talonman]

I am going to use these in my setup, and I think they will work out fine for me.
http://www.xtremesystems.org/forums/showthread.php?t=160606&page=2

[CyberDruid]

Those look similar to some I found in th US Plastics catalog. I think I might have to get a pair and send them to Martnm210 to see what his new manometer makes of the drop. I would love to use those on my external coolers.

[KaptCrunch]

the ball valve will be the lest restrictive only if you can get them in larger speedfit couplings to fit hose od

[silverphoenix]

technically a ball valve of proper size should be no more restrictive than standard tubing.

[CyberDruid]

I used 3/8 ballvalves on a manifold I built but they are large and expensive.

[CrazyJoe]

I use Tygon 1/2" x 3/4" tubing and I have 5 sets of the following for my external water-cooling cabinet. ( two full loops with dual-out from the CPU )

5/8" Polypropylene Bulkhead Panel Mount Hose Barb Shut Off ..... $13.48 each - here (http://www.usplastic.com/catalog/variant.asp?catalog%5Fname=usplastic&category%5Fname=6917&product%5Fid=7413&variant%5Fid=60709)

5/8" Polypropylene Hose Barb Shutoff Coupling Insert .... $8.02 each - here (http://www.usplastic.com/catalog/variant.asp?catalog%5Fname=usplastic&category%5Fname=6917&product%5Fid=7413&variant%5Fid=60824)


Certainly not the cheapest way to go, and you can go to the 1/2" version as well ... but the Tygon will squeeze over it and the 5/8" allows for a nominal 1/2" open flow. :up:

Patented HFC12 series couplings have flow comparable to many 1/2" nominal flow couplings in a 3/8" body size. Compact and lightweight, HFC couplings replace bulky and heavy brass ball and sleeve couplings in a wide range of applications. An ergonomic design and a large shrouded thumb latch pad product a coupling that is easy to grip and simple to operate. An efficient valve design lead to high flow and exceptionally low spillage. Vacuum to 28 in. 3/8" nominal flow. Specifications: Polypropylene(Gray) Working Pressure Max. 60 psi Operating Temperature 32°F to 160°F. Specifications: Polysulfone(White) Working Pressure Max. 125 psi Operating Temperature Max. -40°F to 280° F. Common Specifications: Materials, O-Rings and springs, EPDM and 316 S.S. Recommended Tubing: PVC, Braid-reinforced; PVC, Polyurethane, Silicone Polypropylene is light gray, polysulfone is light beige.

Great idea CD ... I may need to send a couple of mine to Martin so he can get some accurate readings for these as well. I've got some 5/8" and a few 1/2" as well. Be interesting to see what the difference in restriction between the two turns out to be.

[CyberDruid]

Thanks for the links Crazy Joe. I plan to order some. It would be ever so convenient to part the lines for service.

[Navanod]

Those are really costly and fanciful...I wish they would just show the exact pictures of each types of components instead of just showing the same pics, I'm not even sure what I'm actually getting...
I think I'll stick with the ball valves for now...

[contiki]

Thanks for the info Crazy Joe. I am still trying to locate something similar in the UK. So far found only Coleparmer website and what they offer costs somehing like £45 :shocked: :shocked: :shocked:

[KaptCrunch]

get the White 5/8" Polysulfone Hose Barb Shutoff Coupling Insert for
Specifications: Polysulfone(White) Working Pressure Max. 125 psi Operating Temperature Max. -40°F to 280° F.

[kemist]

I use Tygon 1/2" x 3/4" tubing and I have 5 sets of the following for my external water-cooling cabinet. ( two full loops with dual-out from the CPU )

5/8" Polypropylene Bulkhead Panel Mount Hose Barb Shut Off ..... $13.48 each - here (http://www.usplastic.com/catalog/variant.asp?catalog%5Fname=usplastic&category%5Fname=6917&product%5Fid=7413&variant%5Fid=60709)

5/8" Polypropylene Hose Barb Shutoff Coupling Insert .... $8.02 each - here (http://www.usplastic.com/catalog/variant.asp?catalog%5Fname=usplastic&category%5Fname=6917&product%5Fid=7413&variant%5Fid=60824)


Certainly not the cheapest way to go, and you can go to the 1/2" version as well ... but the Tygon will squeeze over it and the 5/8" allows for a nominal 1/2" open flow. :up:



Great idea CD ... I may need to send a couple of mine to Martin so he can get some accurate readings for these as well. I've got some 5/8" and a few 1/2" as well. Be interesting to see what the difference in restriction between the two turns out to be.


Those are the colder connects that we were talking about earlier. The shutoff kind, which is what you have in your links, are pretty damn restrictive