Help on new used Ace Care Tank/Valve...

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Long time lurker here, finally mustered up the courage to get an air source for the Wildcat. I purchased a "new" to me Ace Care tank with this valve. I brought it in to my local dive shop, they said they could fill to 4500, after the fill there is a leak coming from the burst disc. Shop manager says the valve isn't a "4500" valve and can only fill to 3000. I'm not sure what to do, please advise a newbie here. The tank is a 9l and this is the valve that was included with it, I can get a new valve if needed however i'm unsure of what to get or how to proceed next. I was so excited only to be disappointed, HELP!? 👌












 
The shop manager is obviously ignorant of what 30 MPa means and thought it meant 3000 psi. 30 MPa is 300 bar or 4350 psi. Some of the Acecare tanks are 300 vice 310 bar. FYI, 1 MPa is equal to 10 bar.
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That was my understanding of what 30mpa meant also, but I figure the "shop manager" was the professional here. Why would the valve be leaking at the burst disc once its filled? Is there something that needs to be replaced??
 
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Ok. How is your tank new when you said it's used. I never saw an item new and used. How is that possible. It's either new or it's used. Not both. Remind of of hell's kitchen with gordan Ramsay. Is it frozen or fresh. Cheif: its frozen fresh. Ransay: are you a ***ing moron? Lmao.

Ok on topic. I have the same ace care tank but mine is 6.8L. About 74cf tank. Came with same valve. But mine is brand new, not new used lol. These tanks are rated for 30mpa. Which is 300 bars or 4500 psi. 30 MPA does not mean 3000 psi. That guy dont know what he's talking about. Any burst disc can burst under its rated pressure. Just replace the disc with a new one. They are like $2-3 online vs a new valve $60-100. Mine never burst and I always fill to 4500 psi. Have my tank for 2 years. But I fill myself since I have my own compressor. 
 
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That is the strangest looking valve I have ever seen! is it an SCBA or a SCUBA valve?
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I'm not sure what valve it is, its an Ace Care tank, HPA?

This is going to sound stupid but 30mpa = 3 bar while 30MPa = 300 bar. 300 bar = 4350 psi. It can get confusing but I would think a fill shop should know better. A leak FROM the burst disk sounds like it was replaced and not installed well OR it burst.....
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Thank you for that clarification, I didnt know there was a differece in MPa and mpa. 

Ok. How is your tank new when you said it's used. I never saw an item new and used. How is that possible. It's either new or it's used. Not both. Remind of of hell's kitchen with gordan Ramsay. Is it frozen or fresh. Cheif: its frozen fresh. Ransay: are you a ***ing moron? Lmao.

Ok on topic. I have the same ace care tank but mine is 6.8L. About 74cf tank. Came with same valve. But mine is brand new, not new used lol. These tanks are rated for 30mpa. Which is 300 bars or 4500 psi. 30 MPA does not mean 3000 psi. That guy dont know what he's talking about. Any burst disc can burst under its rated pressure. Just replace the disc with a new one. They are like $2-3 online vs a new valve $60-100. Mine never burst and I always fill to 4500 psi. Have my tank for 2 years. But I fill myself since I have my own compressor.
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The tank is "new" to me, it was advertised as "new" but I purchased it second hand so I'd consider it used. I guess if it was new I wouldn't have this problem? Is there a specific size of burst disc? 



If the burst disk went it would get exciting near by. If it is a slow leak it just might need a little cleaning around or just replace. Last fill at a dive shop they forgot and left a 3000PSI tank hooked up and it blew at 3600 or so. 4 grown men scurrying for cover and items forsale being blown off the shelves.
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Is there something specific that I should be looking for when cleaning/replacing the area around the burst disc?



Thanks everyone for the wealth of information. 
 
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If you bought it from someone then it isn't new. That's the thing when buying used item. You never know what the other owners done with it. Maybe it was leaking that's why they sold it. If the burst disc goes, it is gonna be more than a leak. It will be like psssssshhh, like opening the valve and letting air out fast. The burst disc is a safety device that when the tank if overfill passed 4500, example 5000, then the burst disc ruptured to let pressure out so the tank doesn't explode. If it's only a small leak then it's not the burst disc. Check to see all connection are tight. If still leak then off valves and check o rings. Try using thread tape on the threads. I haven't have any issue with my acecare tank. I bought it new for $250 on eBay. Shipping was $60. So total I paid $310.
 
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If you bought it from someone then it isn't new. That's the thing when buying used item. You never know what the other owners done with it. Maybe it was leaking that's why they sold it. If the burst disc goes, it is gonna be more than a leak. It will be like psssssshhh, like opening the valve and letting air out fast. The burst disc is a safety device that when the tank if overfill passed 4500, example 5000, then the burst disc ruptured to let pressure out so the tank doesn't explode. If it's only a small leak then it's not the burst disc. Check to see all connection are tight. If still leak then off valves and check o rings. Try using thread tape on the threads. I haven't have any issue with my acecare tank. I bought it new for $250 on eBay. Shipping was $60. So total I paid $310.
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The leak is coming from the burst disc fitting and its a psssssssssh. While at the dive shop, i put on some teflon tape, tightened it back up and filled it with the same results. That is the only location on the valve that is losing air. Is there an oring that is supposed to be in there?
 
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If you bought it from someone then it isn't new. That's the thing when buying used item. You never know what the other owners done with it. Maybe it was leaking that's why they sold it. If the burst disc goes, it is gonna be more than a leak. It will be like psssssshhh, like opening the valve and letting air out fast. The burst disc is a safety device that when the tank if overfill passed 4500, example 5000, then the burst disc ruptured to let pressure out so the tank doesn't explode. If it's only a small leak then it's not the burst disc. Check to see all connection are tight. If still leak then off valves and check o rings. Try using thread tape on the threads. I haven't have any issue with my acecare tank. I bought it new for $250 on eBay. Shipping was $60. So total I paid $310.
Click to expand...


The leak is coming from the burst disc fitting and its a psssssssssh. While at the dive shop, i put on some teflon tape, tightened it back up and filled it with the same results. That is the only location on the valve that is losing air. Is there an oring that is supposed to be in there?
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No, the burst disc does not have any o ring. Only the valve that screw into the tank have the o ring. If it's not leaking at the valve and it's only leaking where the burst disc is. Just replace the burst disc. eBay has them for $5-9 shipping from the USA. Just take off the old on and screw the new one in..you shouldn't need any thread tape on the burst disc. These are rated up to 5000psi. Here's a link on eBay. You get two 5000psi rated burst disc for under $5 free shipping. Save the extra one when you need it.

https://www.ebay.com/itm/2-pack-5K-PAINTBALL-Air-BURST-DISKS-HPA-N2-5000psi/333309861973?_trkparms=aid%3D1110001%26algo%3DSPLICE.SIM%26ao%3D1%26asc%3D40741%26meid%3D2cc53a30cbc1467e90dc5f55c6280c80%26pid%3D100930%26rk%3D1%26rkt%3D8%26sd%3D312702170685%26itm%3D333309861973%26pmt%3D0%26noa%3D1%26pg%3D2349624&_trksid=p2349624.c100930.m5375
 
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Every burst disc I have ever seen was a thin metal disc or cup that is tightened and somewhat "crushed" between the valve body recess and the vented retainer screw.

Who knows what the Chinese have done but the retainer is usually straight threads and straight threads DO NOT GET THREAD SEALER. The pressure is retained by a metal to metal seal crushed firmly tight.

It sometimes happens that a burst disc was not tightened enough (it does not take that much as the disc material is soft) or it might have been loosened to vent the tank for some reason (a reason like hooking up to a rifle without a bleed somewhere in the system ( on the valve or in the fill line) that you then can't disconnect because the pressure is locking the QDs - so you have to bleed the entire tank down.

I've been called in twice to fix just such an issue by noobs. But usually you can just tighten down the retainer, but just a couple of foot/pounds and stop the leak. If it doesn't then either the disc has to be replaced or it might be a one piece unit that combines disk and retainer and the whole thing gets replaced. Remember, it does not have to be tightened until it screams, look up the amount of torque and use/borrow a torque wrench the first time so it's set right and it will seal. After that you will just be able to set one by knowing the feel of how much the first time. Yes, if you tighten it too much it will probably seal but if you ever have to replace it you might have damaged the seat and the next disc will NOT seal which means the whole valve gets replaced, an expensive mistake of brawn before brains
 
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That is the strangest looking valve I have ever seen! is it an SCBA or a SCUBA valve?
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The valve is a regular DIN 300 type. It is connected to a DIN 300 fill assembly with bleed-valve, gauge and whip hose.
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Makes sense then, not seen them used widely here, I would only ever use the BEST FITTINGS dedicated airgun valve, BF import most of the above cylinders so fit their own valves. I have bought a lot of cylinders direct from ACECARE but always bare and fit the BF valve myself.

Does the DIN fitting I presume being used for SCUBA require a different testing period?
 
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BEST FITTINGS UNIT!

1568797787_584848205d81f45b1e9764.89840885_2019-09-18_10-08-40.jpg

 
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The above valve is a DIN 300 valve. The interface between the hose fitting and the valve is G 5/8 or 5/8 BSPP which is also known as DIN. Here in Australia, it is pretty much the standard for all high-pressure breathing systems, scuba or scba when pressures are higher than 200 BAR. lower pressure scuba normally uses the yoke type connections. As far as I know, CGA 347 and 346 is what you are referring to as scba is only used in the USA. As for different valve inspection intervals, I'm not aware that there is a requirement for periodic inspections on valves but I'm sure that they get looked at when the tanks are hydro. tested and if unserviceable won't be reused. It's your prerogative to get your gear from where ever you want but you will save yourself a lot of money if you do a little research before handing over your hard-earned on a one-stop-shop for all things air. There is nothing wrong with the Chinese stuff if you do your homework and I wouldn't be surprised if a lot of best fittings stuff is coming from there anyway.
 
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