Quick Disconnects: Koolance VL3 Series

[Hondacity]

crap there's vl4s...

[NaeKuh]

crap there's vl4s...

[hotdun]

Good article on Colder NS6 flow rates. LINK

[NaeKuh]

Good article on Colder NS6 flow rates. LINK

Mine dont look like the NS6's.

As i said you can get a very large inner chamber version, only problems is its not threaded, and as i said it looks uber ugly:

[headala]

so who has got VL4's??

[MpG]

I've got one set of VL4's. Would have two sets, if P-PC's didn't screw my order up and send me two more females. They're freakin' beasts. Like a big roll of nickels, and almost the same weight. Here's a side-by-side with a BP 1/2" fitting.

Edit: About 8.5cm long, when coupled like that. Although you need a couple extra cm to make room for them to be pulled apart.

[Froggy]

That is BIG! What is the overall length of that Q/D?

[hotdun]

Mine dont look like the NS6's.

As i said you can get a very large inner chamber version, only problems is its not threaded, and as i said it looks uber ugly:

Those are the HFC12 series that have slightly better flow than the NS6 but are not as "non-spill" when de-coupled. I think they look OK panel mounted....

[DeanB]

We didn't release VL4s with g1/4 treading initially because the largest ID g1/4 can handle is ~3/8 so it seemed a bit contradictory to put g1/4 thread on a 5/8 shutoff valve.

Would you prefer g3/8 threading on the shutoff valve if we made g3/8 to g1/4 adapter available, or just g1/4 on the nozzles even though it would reduce the performance?

[ecidious]

Just about everyone here uses G1/4 and 1/2" to 3/8" ID tubing so g3/8 adapters would just add extra cost for users.

[DarthBeavis]

We didn't release VL4s with g1/4 treading initially because the largest ID g1/4 can handle is ~3/8 so it seemed a bit contradictory to put g1/4 thread on a 5/8 shutoff valve.

Would you prefer g3/8 threading on the shutoff valve if we made g3/8 to g1/4 adapter available, or just g1/4 on the nozzles even though it would reduce the performance?

Dean do you have VL4s with 3/8,5/8 compression fittings (have not found them) as that solution would work for me . . . .and I will be needing it in a next couple months. If not then I need a threaded solution be it G 3/8 or G 1/4. Will you guys be able to help me in that time frame?

[DeanB]

Just about everyone here uses G1/4 and 1/2" to 3/8" ID tubing so g3/8 adapters would just add extra cost for users.

I understand... but its like putting 1" exhaust on a 5.0. We can do it and we may, but it kind of confuses me personally.

Dean do you have VL4s with 3/8,5/8 compression fittings (have not found them) as that solution would work for me . . . .and I will be needing it in a next couple months. If not then I need a threaded solution be it G 3/8 or G 1/4. Will you guys be able to help me in that time frame?

I don't think 3/8ID VL4s will be available. If you're using 3/8 then you should see little to no restriction with the VL3s. I would bet that we will have some kind of threaded option available within the next couple months.

[DarthBeavis]

I understand... but its like putting 1" exhaust on a 5.0. We can do it and we may, but it kind of confuses me personally.



I don't think 3/8ID VL4s will be available. If you're using 3/8 then you should see little to no restriction with the VL3s. I would bet that we will have some kind of threaded option available within the next couple months.

please send me some samples to beta test

[Capt Proton]

I don't think 3/8ID VL4s will be available. If you're using 3/8 then you should see little to no restriction with the VL3s.

If this is true, how do you explain the results Hondacity posted in the first post of this thread? .5 GPM for a pair, which is what the vast majority of people would be using, is not "little to no restriction"

[SNiiPE_DoGG]

VL4s in 3/8 ID 5/8 OD would be nice as well

+2 I only use 3/8 - 5/8" tubing nowadays.

EDIT- yeah I want threaded either way so threaded VL3's would be nice I guess

[NaeKuh]

We didn't release VL4s with g1/4 treading initially because the largest ID g1/4 can handle is ~3/8 so it seemed a bit contradictory to put g1/4 thread on a 5/8 shutoff valve.

Would you prefer g3/8 threading on the shutoff valve if we made g3/8 to g1/4 adapter available, or just g1/4 on the nozzles even though it would reduce the performance?

we can use bitspower couplers to make G3/8 -> G1/4

[DeanB]

If this is true, how do you explain the results Hondacity posted in the first post of this thread? .5 GPM for a pair, which is what the vast majority of people would be using, is not "little to no restriction"

The test was most likely done with 1/2" tubing and fittings, and the VL3s are rated at a 3/8" flow through, so there would be a flowrate drop. But on a 3/8" loop the drop should be minimal.

[Capt Proton]

The test was most likely done with 1/2" tubing and fittings, and the VL3s are rated at a 3/8" flow through, so there would be a flowrate drop. But on a 3/8" loop the drop should be minimal.

Hondacity? Did you use 1/2" tubing? Hope so. I have a set of these VL3s on the way to replace my VL2s. Sure would be nice if they prove to be substantially better.

[Nickel020]

I understand... but its like putting 1" exhaust on a 5.0. We can do it and we may, but it kind of confuses me personally.

By offering them with the compression fittings attached alread aren't you doing the same thing? Don't the compression fitting get narrower than 1/2" ID themselves?

Also, it's not the smallest diameter that defines flow rate by temselves, but for how long water has to flow through small diameters which defines how much pressure drop there is.
So even if the fitting has a lower diameter than the QD, the larger ID on the QD will still help flow, especially since the QD does have more restriction than a comparable piece of tubing with the same diameter (due to the QD having a shutoff mechanism which hinders flow). So even though the ID of the VL4 is 1/2" it's still not the same as havin a comparable piece of tubing in there, it will cause about the same pressure drop as putting a piece of 3/8"-7/16" tubing inside a loop that otherwise uses 1/2" tubing. So the ID of the QD would have to be even larger than the tubing for it to not cause a pressure drop (compared to a piece of tubing ofequal length).

PS: I like the VL3s very much and if you decide to make VL4s with female G1/4 threading you can be sure that I'm gonna buy them, and I bet a lot of other people will too. In fact, I'm pretty sure that those will sell better than any other of your quick disconnects. People have always been complaining that there are no good QDs with female G1/4 threading, and if the best QDs (pressure drop wise) out there would be available with G1/4 threading no one would buy NS6 CPCs anymore.

[DeanB]

By offering them with the compression fittings attached alread aren't you doing the same thing? Don't the compression fitting get narrower than 1/2" ID themselves?

Also, it's not the smallest diameter that defines flow rate by temselves, but for how long water has to flow through small diameters which defines how much pressure drop there is.
So even if the fitting has a lower diameter than the QD, the larger ID on the QD will still help flow, especially since the QD does have more restriction than a comparable piece of tubing with the same diameter (due to the QD having a shutoff mechanism which hinders flow). So even though the ID of the VL4 is 1/2" it's still not the same as havin a comparable piece of tubing in there, it will cause about the same pressure drop as putting a piece of 3/8"-7/16" tubing inside a loop that otherwise uses 1/2" tubing. So the ID of the QD would have to be even larger than the tubing for it to not cause a pressure drop (compared to a piece of tubing ofequal length).

PS: I like the VL3s very much and if you decide to make VL4s with female G1/4 threading you can be sure that I'm gonna buy them, and I bet a lot of other people will too. In fact, I'm pretty sure that those will sell better than any other of your quick disconnects. People have always been complaining that there are no good QDs with female G1/4 threading, and if the best QDs (pressure drop wise) out there would be available with G1/4 threading no one would buy NS6 CPCs anymore.

No, in the case of the 1/2" VL4s, the 1/2" nozzle is the smallest portion. Yes the QDC mechanism would cause a drop in flow rate, but the actual ID is no smaller than 1/2".

I'll see what kind of information I can get for the VL4s for you.

[NaeKuh]

wahahaha... look at the Quick Discconect fever i caused on this forum.

[veedubfreak]

I'll be putting a pair of vl4s on each of my loops over the weekend when i switch back to my evga board. The only issue i have noticed is that even though i can get the tubing over the 1/2" barb, the tube is too thin walled for the compression cap to actually work, so i'll end up having to use clamps. I'm using 7/16ID/5/8OD masterklear tubing.