FX Crown mk2 max pressure

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merpo

merpo

Member
Apr 17, 2022
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Bratislava, Slovakia
Hey guys,

What’s the max pressure on FX Crown MK2 (grs if that matters) ?

Bottle says 310 max, pressure gauge says 300 bar, text on the rifle says 250 bar, manual says “charge the rifle to wanted pressure”.


So what’s the safe max pressure I can fill the bottle at?

My guess would be 300 but since the text on the rifle says 250, I don’t want to fcuk things up.

Thanks!
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What the Gun says- 250 bar. Never fill to where a bottles capacity says as most of the time it wasn’t even made by the gun manufacturer, it’s just a rating of the bottle not to exceed.

Only fill to what the last mark on the gage if it meets what the gun says, in other words, if your crown had gages that maxed out at 250 bar, it’s equal to the gun.

You are surely going to be testing the o rings and expensive internal parts by exceeding the max pressure that’s noted on the gun itself, not to mention safety which is first and foremost
 
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Bigragu said:
What the Gun says- 250 bar. Never fill to where a bottles capacity says as most of the time it wasn’t even made by the gun manufacturer.

Only fill to what the last mark on the gage if it meets what the gun says, in other words, if your crown had gages that maxed out at 250 bar, it’s equal to the gun.
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But the gauges say 300, that’s what got me confused.
See, my M3 gauges says 250, bottle says 310, ok, not gonna above 250.
But why the gauges on my Crown say 300 then?
 
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hawkeye69 said:
Those little gauges are not all that accurate, so they need a little headroom for error.
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that's OK, when I fill my gun I use my Hill EC-3000 to set the correct pressure. But the gauges which are mounted on my Crown are clearly set for 300 BAR, that's what got me curious about this topic.
As I said in my post earlier, my FX M3 has 250 gauges, so I'm not even thinking going above.
But why would someone install 300 BAR gauges on a gun that does not support it? Mistake? They didn't have 250's at hand? :) or does the gun actually support it?
 
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Ghillie said:
that's OK, when I fill my gun I use my Hill EC-3000 to set the correct pressure. But the gauges which are mounted on my Crown are clearly set for 300 BAR, that's what got me curious about this topic.
As I said in my post earlier, my FX M3 has 250 gauges, so I'm not even thinking going above.
But why would someone install 300 BAR gauges on a gun that does not support it? Mistake? They didn't have 250's at hand? :) or does the gun actually support it?
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You are really over thinking this. My Renegade fills to 220 bar, my old Wildcat and Bantam charge to 230 bar. Would they make special gauges for each gun, or would they just use a standard gauge? . Regardless of the maximum pressure on the gauge face, you can still overcharge a gun.

This is getting silly, I'm done.
 
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To be clear, the bottle is a 250 bar bottle, NOT 300 Bar. The bottle says PW250. That stands for “Working Pressure” and means that it should only be filled to 250 bar on a regular basis. The 300BAR is at 60 degrees C, or 140 F, and represent the maximum pressure for the bottle. The PW250 is at 15 C or 59 F
 
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ChRiSiS said:
To be clear, the bottle is a 250 bar bottle, NOT 300 Bar. The bottle says PW250. That stands for “Working Pressure” and means that it should only be filled to 250 bar on a regular basis. The 300BAR is at 60 degrees C, or 140 F, and represent the maximum pressure for the bottle. The PW250 is at 15 C or 59 F
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that's interesting, thanks for pointing this out!
 
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A couple of reasons.

Gauges are generally more accurate with a working pressure below max unless you purchase a higher class gauge

If the gauge was at 250 max how would you know if you overfilled it?

Finally, the gauge on the fill source (e.g. liquid filled scba tank gauge) is generally more accurate than the one on the rifle, and is what you should use when filling.
 
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hey /dev/null,
cool username.. i don't get your point here.
my FX M3 has 250 BAR gauge, it's rated 250 BAR max pressure. It all makes sense, if you read more than your manual, you know that you should use the fill source gauge for the pressure measure.
My FX Crown MK2 though has 300 BAR gauge. See the difference? (not trying to be offensive, just pointing out the difference I don't understand).
 
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Here is one issue to consider. The airgun's fill gauge and the compressor's fill gauge exhibit questionable accuracy, as do pressure shutoff devices. And none of us want to needlessly pop protection devices. To save all of the misleading issues, I bit the bullet (pellet, slug?) and bought a decent Wiki, digital, and calibrated. ±1% pressure gauge. Yes! They're not cheap (≈$400 to ≈$500 depending on size)! But knowing what the error factor is, could save you in more ways than one!
 
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