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Old 07-12-2007, 03:06 PM   #1
Bobby_M
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Default High Temp Quick Disconnects

The way I see it, I need at least 4 female and 2 male quick disconnect fittings to get my 3-keg single tier going.

3 bulkhead drains (female)
March pump lines in and out (male)
CFC chiller input (female) (the output will just have a hose clamped on.)

Based on Morebeer pricing:
Female CPC with MPT = $11.75 x 4 = $47
Male CPC with hose barb = $6.75 x 2 = $13.50

You know, I was thinking that outfitting the whole system with these would break the bank but $60 isn't all that bad. Am I forgetting something?

Has anyone had a CPC female fitting leak? I'm throwing around the idea of threading the female fitting directly into the bulkhead couplings and leaving that as the only seal to stop flow out of the vessel (when the male is not connected obviously). Am I nuts? I'm trying to think of when I'd need to stop the flow while the hoses are connected.

Having the males on the march pump hoses means that when I disconnect, I'll leak whatever liquid I have in those lines since males are non sealing. If I reverse them so that the males are on the vessels, I need to put ball valves on the bulkheads but I save some money in buying less females, more males. The liquid in the pump lines would be trapped until the next transfer. Maybe less dripping?

I'm just thinking out loud and would like to hear your experiences with these fittings and how you've oriented them.



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Old 07-12-2007, 04:22 PM   #2
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Take a look at McMaster-Carr for the QDs:

Straight Through Coupling Plug, 1/2" Nptf Male, 3/8" Coupling Size 6739K59 - $1.75 Each

Straight Through Coupling Sleeve-Lck Sckt X Barb for 1/2" Hose Id, 3/8" Cplg 6739K64 - $6.01 Each

Straight Through Coolant Hose Coupling Sleeve-Lock Socket, 1/4" Nptf Fem, 3/8" Cplg Sz 6739K61 - $5.57 Each

You might want to verify that the female QDs that you want to use on your bulkheads are free-flowing (do not shut off flow) when disconnected. It means you would need another male on hand for cleaning purposes. My design has all hardware side (bulkheads, pumps, etc) fittings with male QDs and all my hoses with female QDs. Two advantages:

1. I need more male QDs than female QDs - cost savings
2. If the hoses hit the ground, the head is protected. A male QD could get damaged.



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Old 07-12-2007, 04:45 PM   #3
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I would use ball valves between the vessel and a male QD fitting. No drooling hoses, and a positive seal as well as the ability to meter flow from the vessel into the hose. I would not rely on just a female QD on any vessel.

Now recognize that I have no experience with QD fittings in brewing, so treat this as theoretical not practical advice. On the other hand, I have several female QDs on my air compressor, hoses and air tools, and the females all leak from time to time.

Please note, my observations are strictly limited to the female of the QD species, and in no way apply to the female of any other species, regardless of what anyone else may infer from my statement....

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Old 07-12-2007, 06:53 PM   #4
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Yeah, don't mess with females that leak.

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Old 07-12-2007, 07:04 PM   #5
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Quote:
Originally Posted by Bigfoot99

You might want to verify that the female QDs that you want to use on your bulkheads are free-flowing (do not shut off flow) when disconnected. It means you would need another male on hand for cleaning purposes. My design has all hardware side (bulkheads, pumps, etc) fittings with male QDs and all my hoses with female QDs.
Ok, I'm with you there. Just wondering why you put disconnects between your pump and hose. Assuming you use the pump for all transfers, wouldn't it be easier to use a cheap hose barb on both sides of the pump eliminating two male and two female QD's?

I guess if I go with brass QD's I might as well save the money on stainless ball valves and go brass there. I suppose pickling them takes away the danger anyway.

If I go with the slightly more expensive CPC food grade QD's, it makes the stainless more practical.
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Old 07-12-2007, 09:27 PM   #6
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Quote:
Originally Posted by Bobby_M
Just wondering why you put disconnects between your pump and hose. Assuming you use the pump for all transfers, wouldn't it be easier to use a cheap hose barb on both sides of the pump eliminating two male and two female QD's?
I have different hose lengths for different applications, and cleanup is a lot easier since I can simply disconnect the hose from the pump.
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Old 07-12-2007, 09:33 PM   #7
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Whatever you do Bobby, we need pics of your end application please. Thanks!

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Old 07-27-2007, 06:08 PM   #8
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Default my 2 cents

I have just finished installing my QD's on my brewery and love them. I bought high flow/high temp polysulphone QD's from usplastics.com for the hot-side of my brewery and smaller lower temp ones for the cold-side. They were costly but helps me keep everything easier to hook up and break down, which is a very big blessing and I would recommend anyone making the move on bigger setups. I will post pics of mine in a little while, I just moved it and am busy hooking everything back up. I used female (more expensive) for all my hose fittings and males (way less expensive) for everything else. I would recommend usplastics as a solid company (no affiliation) with great shipping and customer service, not to mention a great catalog to look at anytime you are bored

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Old 07-27-2007, 06:44 PM   #9
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Quote:
Originally Posted by wortmonger
I have just finished installing my QD's on my brewery and love them. I bought high flow/high temp polysulphone QD's from usplastics.com for the hot-side of my brewery and smaller lower temp ones for the cold-side. They were costly but helps me keep everything easier to hook up and break down, which is a very big blessing and I would recommend anyone making the move on bigger setups. I will post pics of mine in a little while, I just moved it and am busy hooking everything back up. I used female (more expensive) for all my hose fittings and males (way less expensive) for everything else. I would recommend usplastics as a solid company (no affiliation) with great shipping and customer service, not to mention a great catalog to look at anytime you are bored
Pics? Catalog numbers of the part? Please!
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Old 07-27-2007, 08:32 PM   #10
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Default Information, Finally!!!

Here's what I use.

My Hot Liquor Tun has a weld-less site gauge and a thermometer. My Mash Tun has a stainless false bottom and the ball valve assembly is located direct center on the bottom of the keg. I really like having the valve on the bottom so I can drain the MT completely. I have my grant and march pump hooked together so it is easy to move around, and I can easily take it apart to clean if need be. This is the only place I still use my Blichmann "quick connects" (note they aren't Quick Disconnects). This is the only product from Blichmann's that I will bitch about. They leak and the seal pops out and gets lost every time I used them. Plus they are $20 for two connections.

Here are the actual QD's I use on my hot-side.
http://www.usplastic.com/catalog/product.asp?catalog%5Fname=USPlastic&category%5Fna me=6917&product%5Fid=7413

And here are the cold-side QD's I use these in my kegerator and wow they make changing out a keg, tap, or gas bottle easy.
http://www.usplastic.com/catalog/product.asp?catalog%5Fname=USPlastic&category%5Fna me=6917&product%5Fid=8429

I didn't post any prices as you guys can check them out for yourselves. I primary in a 32 gallon Brute trash can (also sold by usplastics and food grade), and secondary in my serving keg with a spunding valve for natural carbonation. I have enjoyed the ruff times when I first started up with my old system, but all these little tweaks have definitely given me less headaches and cleanup. Hope this helps or gives someone some direction. I will be glad to answer any more questions, as I am sure I am leaving out a bunch.

Oh, and for you guys that want to know more about the spunding valve:

UPDATE!!! Here is a link to the Wiki article about spunding.

Hope this is interesting.



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