Bolt pressure? Operating pressure? I'm confused

[sharpshooter98]

again come the terms. Someone told me that bolt pressure is different than operating pressure. Is he right? What is the difference? What is the an average bolt pressure for a low end blowback like a tippmann or spyder(average/estimate) remember its stock.

[xen_100]

general speaking.....when someone says "operating" pressure they are talking about the input pressure to the gun......a stock spyder will have about a 800PSI operating pressure.......the pressure that that ball sees once you fire is alot less.(about 60-90PSI, depending on the gun) this is "bolt" pressure.

[Havoc_online]

a spyders operating pressure is NOT 800psi.

operating pressure is the psi needed for the marker to cycle. like in the case of the cocker, it's the pressure needed to seal the valve and move the ram rod(actually - the rod, backblock, bolt, cocking rod and hammer).(after pressure is regulated by the inline and lpr) input to the reg is higher. The actual air pressure on the ball in the case of the cocker is around 120psi.

[sharpshooter98]

I still don't Know what the OPERATING PRESSURE IS FOR A LOW END BLOWBACK MARKER! Like a stock Tippmann or spyder (stock)

[xen_100]

if I am putting 800 PSI into the gun with no secondary reg.....the the gun is operating off of 800PSI. How is it not? granted, the ball will not see 800PSI. the gas will expand and see alot less than 800PSI. but the gun operates at that pressure.

[Havoc_online]

just because the marker takes that much pressure and works doesnt mean that's its operating pressure.

operating pressure is the lowest psi needed for the marker to cycle.

peak pressure is the air pressure on the ball.



operating pressure is the psi needed to seal the valve/regs/ it puts pressure on springs, triggers, blablabla. everything the marker needs that doesnt include the peak pressure

[Paintmanmike]

What is needed is another definition

How about "inlet pressure" as the pressure that the marker designer expects the user to provide at the ASA connector. It would be higher than Havoc's operating pressure which he defines as the absolute minimum it takes to run the marker. This is because of the hertiage of CO2, CO2 tanks output around 800 psi when at room temperature. However this is not a regulated output and varies with temperaure so there must be some margin in the design of the marker to tolerate the expected variation.

So no one designs the marker to always be at the minimum, that would not be robust. Instead they design the marker to have a operating pressure lower by some margin than the typical inlet pressure provided by CO2 or fixed regulator HPA tanks which are usually set for 800 psi. This way the marker will operate robustly over some expected range of inlet pressure. A good HPA tank and regulator does not have this limitation and the marker can be optimized to run at lower pressure but you would still expect to see some design margin between the absolute lowest pressure and the inlet pressure.

[Havoc_online]

after pressure is regulated by the inline and lpr) input to the reg is higher

Thanks for taking the time to post in detail. I did the quick and dirty version.