Diving tanks-at what pressure do you refill?

[Rapidnick]

As title. I'm interested to know how far 'down' you let the pressure drop in your tank before you take it in for a refill.

[MartynB]

As title. I'm interested to know how far 'down' you let the pressure drop in your tank before you take it in for a refill.

When I had a 232 bar tanks, I used to let it get to 180 as thet was the sweet spot back then. I disposed of that and got a 300 bar tank and get more fills

[Dodger21]

It really depends on the fill pressure of the rifle and howeasy it is to get to the refill centre but most guns will give you a reasonableamount of shots down to around 170 bar.

[mickmep]

usually run club ones down to between 170 and 160 bar before taking in.
lots of air arms shooters in club and they tend to fill to around 180 bar.

my personal one around 190 ish and it gets filled. its used for filling fac wolf which fills to 230 if available, local fill guy wont fill 7 litre from much lower, it makes his compressor too hot. took a bit of persuading to get him to fill from there, he sold me the bottle then decided he wouldn't fill them any more. don't use him any more. wouldn't bother taking a 12l in there so now go to closest dive shop for fills.

since getting more involved in the local club I tend to take mine and the clubs 2x12l ones in at the same time, so mine may well have a bit more in when it gets a top up.
my personal one went in for test Saturday, still had 200 bar in it, but club ones needed filling and saved a journey in a couple of weeks to take it on its own.

[Jesim1]

Much as above - I have a 300bar version, I don't see the point in 232bar cylinders for air guns as we are only interested in the high end pressure, so by 170/160 you really need it filled again.

So 170 - 230bar on a low pressure cylinder means your getting about 60bar worth of use at however many litres your cylinder is, on a 300 bar filled to say 290 your getting 170 - 290, so typically double the use regardless of your size of cylinder as long as you compare like for like sizes.

James

[angrybear]

As title. I'm interested to know how far 'down' you let the pressure drop in your tank before you take it in for a refill.

Note the pressure at which your rifle's POI starts to drop & add 30-40bar (enough shots for a hunting trip) to that as a minimum.

So as my rapid's fine down to 120bar, once the refill pressure equalises at 150bar ish then it's time for a refill.

[where's it gone]

If I'm refilling a rifle, and the max on rifle is 200 bar, I'd would need the diving tank to have at least this pressure in it. Yes I know I'm wasting money because I pay the same for a refill on D/T to 300 bar as if the D/T is near empty. But then again, I want to fill my rifle not top it up partly.

[angrybear]

If I'm refilling a rifle, and the max on rifle is 200 bar, I'd would need the diving tank to have at least this pressure in it. Yes I know I'm wasting money because I pay the same for a refill on D/T to 300 bar as if the D/T is near empty. But then again, I want to fill my rifle not top it up partly.

Daft, but entirely up to you.

Better to know the sweet spot & only fill to that upper level

[RobF]

Daft, but entirely up to you.

Better to know the sweet spot & only fill to that upper level

If your rifle has a sweet spot. If regged it may not, then it's a case of shot count.

[SuffolkRifle]

I usually get them refilled when they get to about 180 bar (got two, a 3 litre and a 12 litre), the guns we have aren't regged, but will shoot accurately down to 150 bar, but as we shoot target, we 'need' 30 shots, and a 180 fill just about does that. We're lucky in that our local dive shop is only about a fiver for a 12l fill, less for a 3l

[angrybear]

If your rifle has a sweet spot. If regged it may not, then it's a case of shot count.

True enough.

[lensman57]

As title. I'm interested to know how far 'down' you let the pressure drop in your tank before you take it in for a refill.

Mine is a 300 bar tank and I usually call it a day when it hits around 160. You see it would not do much for my HW 100 but it can still fill my S400, Regal XL and BSA r10 for a couple of fills before it becomes really useless. I only wish that the re-fill would be a proper one to 300 which it seldom is.

A.G