oil in pcp

[barrywhite 282]

I have just gotten a SSP air gun .In the instructions they sugest poring oil down the barrel to oil the main o ring and oiling the pump when stiff.I have decided to put silicon oil and molycote in the pump area quite heverly so when the gun is shot a trace of oil and grees is seen on the pellet probe.I feel this will oil the o rings inside the gun.The gun shoots nice and constant 11.2 FTLBS......So I wonder would it be a good idea to introduce some oil into a pcp when putting in the air.Just a drop to oil the regulaters o rings.

[donnyc 1,203]

NO

[fry 209]

NO

what he said nooooooo

[barrywhite 282]

I am not trying to say you are wrong .Are you two saying NO because you have been told no,think no,or you understand the guns working and know NO.When using a Theoben a small amount of grese is place on the bottles thread from time to time some must get into the gun ,or not .

[Daz 7 563]

That grease on the Theoben Bottle is only to keep the Seal Lubricated and to stop it hardening, and failing. And then its only a very small amount applied to the Seal !!!!!!!!!!

 

regards Daz.

[donnyc 1,203]

I am not trying to say you are wrong .Are you two saying NO because you have been told no,think no,or you understand the guns working and know NO.When using a Theoben a small amount of grese is place on the bottles thread from time to time some must get into the gun ,or not .

Tell you what you go pour some oil into your gun ...I know why NO..Go ring theoben and ask or God oh no I meant BT.

[sneeky1 5]

I am not trying to say you are wrong .Are you two saying NO because you have been told no,think no,or you understand the guns working and know NO.When using a Theoben a small amount of grese is place on the bottles thread from time to time some must get into the gun ,or not .

Tell you what you go pour some oil into your gun ...I know why NO..Go ring theoben and ask or God oh no I meant BT.

what does happen mate?just out of curiosity i,ve always ran my guns dry with no probs but would it go bang or just muck up the valve and internals

 

atb sneeky

[matt_hooks 188]

Compressed air and mineral oil are not a good mix. A diesel engine ignites at a compression ratio of about 19:1, hence a pressure of about 20 bar (ok, maybe a bit higher, and the heat of compression helps with ignition) whereas the PCP runs at a pressure around ten times higher than that. I've seen the effect of oil in a relatively low pressure (100 bar) system, and it can be pretty spectacular, so the risk with a 300 bar system is high.

[barrywhite 282]

Posted Today, 08:47 PM

 

Compressed air and mineral oil are not a good mix. A diesel engine ignites at a compression ratio of about 19:1, hence a pressure of about 20 bar (ok, maybe a bit higher, and the heat of compression helps with ignition) whereas the PCP runs at a pressure around ten times higher than that. I've seen the effect of oil in a relatively low pressure (100 bar) system, and it can be pretty spectacular, so the risk with a 300 bar system is high.

 

molycote the stuff theoben use to lube the valve or silicone the stuff you get in the dive shop to grease your dive bottles ect .Not mineral not pouring loads in to the gun just a drop or less .

[fry 209]

Posted Today, 08:47 PM

 

Compressed air and mineral oil are not a good mix. A diesel engine ignites at a compression ratio of about 19:1, hence a pressure of about 20 bar (ok, maybe a bit higher, and the heat of compression helps with ignition) whereas the PCP runs at a pressure around ten times higher than that. I've seen the effect of oil in a relatively low pressure (100 bar) system, and it can be pretty spectacular, so the risk with a 300 bar system is high.

 

molycote the stuff theoben use to lube the valve or silicone the stuff you get in the dive shop to grease your dive bottles ect .Not mineral not pouring loads in to the gun just a drop or less .

sounds like you know more than most and have answered your own question mate. all i am going on is when you put oil down the barrel of a pcp to clean the bore they say dont let it run into the workings.so i dont i put a bit of that white grease on the bolt that pushs the pellet through the mag but no oil.