Author Topic: Is this unsafe? (Read 4332 times))

Wayne52 · « **Reply #20 on:** August 23, 2018, 11:45:34 PM »

I had a brass probe that didn't last long at all and it came from my PP700SA pistol which takes 220bar to fill, that probe dented very badly early on and that's when I ordered a stainless one from a vendor in England, that probe cured the problem completely and am still using it with no ill effects. I am almost thinking that it was a very poor grade of brass because the probe that I fill my SPA M16 is brass also but it never dented nearly like the one from the PP700SA did. I still use that same probe too and I also have another just like it that came with my varmint that is still just fine as well. When it comes to quality I think many times the Chinese mfg's aren't really up to snuff when it comes to durability however recently I've been seeing some better quality coming from China, especially with the SPA stuff.

Tweeter · « **Reply #21 on:** August 24, 2018, 06:14:04 AM »

Bob, the dimpled fitting (male foster) is steel and magnetic. It is an Air Venturi that I bought from PA. When you first said brass I thought you were talking about my female foster shown in the photo. In any case they are both getting scrapped and new parts on the way. Thanks!

rsterne · « **Reply #22 on:** August 24, 2018, 12:40:24 PM »

Sorry, I misunderstood.... Yes, the female is brass, I thought you meant the male was non-magnetic.... I'm glad it's at least steel, but must be a soft grade to have such large dents forming.... Point is I would not use either at the 3600 psi fill you need....

Bob

Paul_R · « **Reply #23 on:** August 24, 2018, 12:54:42 PM »

You're going to get some looseness in any foster fitting when there's no pressure on the line. It's generally nothing to worry about, that's part of what puts the "Q" in QD. If it bothers you there's an o-ring inside the female connection that can be replaced with a slightly thicker one

Tweeter · « **Reply #24 on:** August 24, 2018, 03:58:42 PM »

Thanks Bob.

Paul, thanks for the post. It wasn't the loose fit that worried me (I've been using it like that for months) it is the dimples that are forming on the male foster. I think the loose fit is what caused it. If the ball bearings in the female QD fit snug inside that groove then I don't think they would have any chance to start digging themselves into the shoulder. I have seen all sorts of posts about these chinese QD fittings and how the sizes are very inconsistent. I would think a part holding back this much pressure should need tight tolerances to be safe?

Not risking it, for $20 I bought some fittings that I can trust.

Paul_R · « **Reply #25 on:** August 24, 2018, 04:17:59 PM »

Quote from: Tweeter on August 24, 2018, 03:58:42 PM

Thanks Bob.

Paul, thanks for the post. It wasn't the loose fit that worried me (I've been using it like that for months) it is the dimples that are forming on the male foster. I think the loose fit is what caused it. If the ball bearings in the female QD fit snug inside that groove then I don't think they would have any chance to start digging themselves into the shoulder. I have seen all sorts of posts about these chinese QD fittings and how the sizes are very inconsistent. I would think a part holding back this much pressure should need tight tolerances to be safe?

Not risking it, for $20 I bought some fittings that I can trust.

That's what I get for not expanding the picture to full size. Wow! That male fitting is really taking a beating, I wouldn't use that setup either.

KnifeMaker · « **Reply #26 on:** August 27, 2018, 04:41:46 AM »

One failure in particular was with a pump test. The fitting failed and nailed the fellow in the foot. It is on YouTube. Sorry, watch too many to remember which vid.

Joe, B. talks about them also.

Knife

KnifeMaker · « **Reply #27 on:** August 27, 2018, 04:43:42 AM »

My Air Venturi fitting is starting to show similar wear as well.

Tweeter · « **Reply #28 on:** August 28, 2018, 06:42:07 PM »

Peace of mind

One fitting is rated 5000psi and the other, 10,000psi (can't remember which is which). Should be good now.

Mole2017 · « **Reply #29 on:** September 21, 2018, 11:49:44 AM »

Well, it looks like it happened to someone: https://www.gatewaytoairguns.org/GTA/index.php?topic=148573.new#new

A number of things could have gone wrong besides the ball on the shoulder, but the take away is don't be overly confident of the brass and aluminum parts on these foster connectors. And work safe around compressed air! Eye protection and even hearing protection are cheap insurance. (When I fill the mega-blast things, I where ear plugs--I don't need to hurt my ears anymore.)

USAFANG6799 · « **Reply #30 on:** September 21, 2018, 05:34:45 PM »

Quote

I already wear body armor when I fill my guns with this thing, I look like an EOD tech. haha.

Really......I lay on the table next to mine while it's filling my SCUBA tank and take a nap

What Me Worry

I do have to wonder if brass is that weak why are all the male probes I see made with brass?

Tweeter · « **Reply #31 on:** September 21, 2018, 08:43:56 PM »

By looking at my EDgun probe which is brass, the brass is a heck of a lot thicker than the brass parts on my brass foster fitting. These brass fosters may well be rated for 4500psi but I'm not taking the chance, not for $20. My issue was (I think) the way the two foster fittings fit together loosely causing the dimpling. The fact that it may not be rated for the high pressure was just one more reason to change my setup. YMMV

USAFANG6799 · « **Reply #32 on:** September 21, 2018, 10:26:00 PM »

I went back and did a second take on your pic(zoomed in) YIKES & WOW now that's a real concern. I have some aluminum dead-ends that I use to check things for leaks and neither one of them show dimples like that. I have some brass foster quick disconnects and so for so good. I only pump to 3300 psi so that maybe why?

Very glad you caught that before you had a failure. GOOD EYE!

rsterne · « **Reply #33 on:** September 21, 2018, 10:33:08 PM »

Fill probes have ZERO end load on them because they have O-rings both sides of the pressure port.... Nothing wrong with brass (or aluminum) used properly.... Foster fittings at high pressures does not fit that description....

Bob

USAFANG6799 · « **Reply #34 on:** September 21, 2018, 11:46:51 PM »

Many thanks on the insight between Foster and Probe Bob.

Nvreloader · « **Reply #35 on:** September 22, 2018, 12:18:41 PM »

Justin
Thanks for the info/photo's,
I have checked all my connectors and have not found anything like your photo showing those dimples,
I only fill to 3000/3200 psi for my tanks etc.

Question for you,
Can you provide the thread size of the components in the top photo, and where you got them,
I can't seen to find the correct sizes needed, and what is that washer called?

I am attempting to attach the Black filter (Yong Heng brand) to my SB F-10 compressor outlet etc.

Tia,
Don

Quote from: Tweeter on August 28, 2018, 06:42:07 PM

Peace of mind One fitting is rated 5000psi and the other, 10,000psi (can't remember which is which). Should be good now.

Tweeter · « **Reply #36 on:** September 22, 2018, 02:50:44 PM »

Hey guys check this out. I know its from a different forum but worth seeing for sure! Not sure if it is like mine or not but goes to show that we need to use caution...

https://www.airgunnation.com/topic/close-call-be-careful-with-air/

Tweeter · « **Reply #37 on:** September 22, 2018, 02:56:26 PM »

Don, the male/male fitting is M10 x 1 to 1/8" BSP and the female coupling is 1/8" BSP both ends to fit my micro bore hose. That is a 1/8 BSP dowty seal/washer. You can find them on ebay or amazon easy enough. Hope this helps!

https://www.discounthydraulichose.com/Metric_Steel_Hydraulic_Fittings_s/208.htm

Thane · « **Reply #38 on:** September 22, 2018, 03:17:09 PM »

Having been hose whipped across the face at paintball CO2 pressures using a long hose, I am now a firm believer in good fittings and especially short lines.

Preferably half arm length hoses. I still cringe at the sight of long hoses.

Mole2017 · « **Reply #39 on:** September 22, 2018, 03:20:30 PM »

Quote from: Tweeter on September 22, 2018, 02:50:44 PM

Hey guys check this out. I know its from a different forum but worth seeing for sure! Not sure if it is like mine or not but goes to show that we need to use caution...

https://www.airgunnation.com/topic/close-call-be-careful-with-air/

That sounds like happened to DLP in this thread https://www.gatewaytoairguns.org/GTA/index.php?topic=148573.0..."bearing ring on the female foster fitting blew apart"

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Is this unsafe?

Author Topic: Is this unsafe? (Read 4332 times))