Fill pressure for storage?

[OldmanJunky]

I am about to dive into the darkside headfirst (Mrod, scba tank, etc).

According to the manual, some pressure should be left in the gun at all times, unless it is being worked on (for the Marauder).  But crosman also says that oil should be added to the compression chamber of a springer, so I don't trust it right out.

How much is too much to leave in the gun?  Can I leave enough for it to be "shootable"?  Like 2500 psi?  Or is that bad for the gun?

Thanks!

[MustangMike]

i leave mine at 2000psi, when im done shooting i just pump her up to 2k and hang her back on the wall

[joe k]

i do the same as mike with my mrod and disco.
joe

[Tpatner412]

As long as you don't go over the recommended fill pressure any amount is fine. You are supposed to leave air in to keep the valve closed and pressuriszed. As long as its not empty you're good

[Bandit_46]

Timmy @ Mac1 gave me some Great Advise on this very issue,(Thanks Tim),that when storing my Sumatra I should never be over 1500 PSI,(He said it's Better not to Stress the Seals if storing for long periods)But I've heard from Crosman that they say 2000's A-OK.If your running a tank filling your gun,I'd say be extra Safe and keep her at 1500 psi if your storing for a Long period of time,(but that's just some Great Advise from one of the Best when it comes to the Korean PCP's),so I follow Mac1's advise to the Mark.

It's always Better to be Safe than Sorry,,and I need all the Good advise I can get as I just started with PCP's about 1.5 years ago and I want mine to last me for years if Possible.

[clip]

I store my Discovery with 2000psi at all times. That way, it's easy to check that it's holding air pressure ( no leaks anywhere) and it's always ready to fire.

[rsterne]

^X2.... Disco at 2000 psi when I store it.... also my Grouse gun.... Grab it, glance at the guage, and go.... 

Bob

[redone1992]

I store my Discovery with 2000psi at all times so it,s ready to go.

[Dead nuts dog]

2000 on the disco. Guns got to be ready at any second

[Jay]

Terry you can store the Mrod at full pressure(whatever your fill is) or like you asked at 2,500 which seem's to be the "sweet" spot on them, mine was keep fully charged(28 on mine) for a long time just because it was easier(read lazy) when I used a pump so I didn't have to "work out" before shooting, now that I use a tank I just shoot it down to around 2k an charge before shooting next time.

[RWSshooter]

I never let my Marauder get below 1200 psi...

[OldmanJunky]

Sweet -- thanks guys.  I just got me a carbon fiber 44 cu tank, so I'm prepping everything for the mrod.

[TOM aka critter99]

you will be so much happier filling from that tank.  more trigger time fills go quick on a Marauder

[aack73]

i keep my mrod around 3k/3200 psi. when i shoot it down i usually top it back off and leave it full for next session or the passing crow, whatever comes 1st. it has been that way since feb. i have emptied it a few times for disassembly. otherwise it stays full.

[RWSshooter]

3200?  That scares me...I thought the limit was 3K.

[MustangMike]

3200?  That scares me...I thought the limit was 3K.

he has a mrod that he is talking about

pcp pressures used to scare me some but after 10 fills on my disco egh its just air. be safe, use common sense and everything will be alright

[aack73]

my apologizes i should have stated that and not taken for granted that's what i was referring to. that is a marauder not a disco. the max recommended fill pressure is 3000 psi for the marauder. my point was it would be ok to store/keep your pcp at it's max pressure.  no different than shooting it a lot. discharging and refilling will put more of a strain on the air tube and internals than leaving it full.

[RWSshooter]

Gotcha. ;-)

[TimmyMac1]

My perspective is you don't know what does long term damage till the damage is already done. Why push it to the limit for true long term storage?
I say leave it at the lower end of the spectrum you use. In other words why leave it topped up to the max if you are not using it. It is an unnecesary amount of stress no matter how much extra stress it represents.
Wec saw after 10 years it was a bad idea for Korean guns and I think it is just a degree of degradation of the exhaust valve.
Once an exhaust valve overcomp[resses trhere is far greater force holding the seal on the seat which is a funcxtion of the surface area under stiction. On the Korean guns the seal gets so deformed the brass case enclosing it goes metal to metal on the factory seat and that is when it starts to seep. If the area in contact is greater than the shear force of the plastic the stem breaks out the middle and moves withouyt taking the seal off seat anymore. System shut down.
We see a lot of seal overcompression with materials for seals being used that is just not up to the task. If those seals are subjected to the combination of high pressures and heat they will fold as well.
If your airguns are being subjected to extreme heat and extreme pressures both the recipy for seal deformation is compounded.
Don't leave full pressure in your guns, that is what vessels and pumps are for.
Be condisderate of the forces being applied to the seals and reduce them when heat is present.
I'm not saying don't fill your guns up just don't let them sunbake while you eat lunch.

[Nomadic Pirate]

I store all my PCPs at 100 BAR, I just see no reason to store them Full.