RAW Regulator Behavior

[Gear_Junkie]

Is it true if the plenum pressure drops below the regulator set point, it will bleed out the remaining pressure WITHOUT HAVING TO DRY FIRE THE RIFLE?

Also, does anyone know what size o-ring fits over the bottom plug in the receiver?

Thanks!

 

[Ranchibi]

I believe you know the regulators job is to fill the plenum to it's set point, once the guns reservoir drops below the regs set point is where one will get inconsistent plenum pressures but the RAW's plenum should not bleed out per-say that I have heard of unless an o'ring is leaking.

 

[Gear_Junkie]

View attachment 304861
I believe you know the regulators job is to fill the plenum to it's set point, once the guns reservoir drops below the regs set point is where one will get inconsistent plenum pressures but the RAW's plenum should not bleed out per-say that I have heard of unless an o'ring is leaking.

Thank you! Have you personally confirmed that the receiver bottom plug o-ring listed above is correct? It just seems a little big, but I confess I haven't pulled it apart yet.

And I do think you are right about the leaking o-ring... I was just hoping otherwise I ordered all of the o-rings for the reg, and the one for the bottom plug. Now I just need to rebuild it and hope for the best.

Thanks again!

 

[Ranchibi]

You're welcome! No...cannot confirm but many have said these are the same, hopefully someone will chime in! Yeah...when air bleeds out I too want it NOT TO BE AN O'RING but something easier....LOL! Right now my Prods check valve o 'ring is leaking ever so slowly, easy fix but lazy...LOL!

 

[Gear_Junkie]

Yep, lazy is it! I hope that I don't have to mess with the washer stack when changing these o-rings. If I do, I know where I can get help

Thanks!

 

[elh0102]

I might be thinking about this totally wrong. If the plenum pressure is below the reg set point, then I assume the bottle pressure is also, so the rifle is essentially unregulated. So, if the bottle is unscrewed, then yes, would not the plenum drain without the need to either dry fire or loosen the reg housing?

 

[Airgunmann]

I think my plenum used to drain if it was below the reg if I remember correctly

 

[corny]

I’ve seen it both ways, probably depends on the condition of ur reg seal.

I’ve seen it drain completely after I pulled the bottle. And I also seen it retain the air in plenum. As I went to remove the reg, it just didn’t feel right. Didn’t loosen as it would normally. So it can happen. Dry firing fixed the problem.

 

[Gear_Junkie]

Does the reg seal that lets the plenum leak out also affect the reg function? If not, I might not pull everything apart as I'm imagining it being a nightmare to get set back up.

 

[Motorhead]

Zack,
With regulators that have a very high quality & good condition Internal seat/seals, they will hold plenum pressure even tho air pressure in HP side of system becomes zero.
Only when you cycle action and shoot it ( Empty ideally ) and plenum pressure drops under set point will you suddenly get a WHOSH of air pass threw the reg and back out the intake side as plenum pressure collapses.

Now regs that won't hold in the plenum charge as HP side is drained or bottle removed ... are telling there quality of seal is not ideal.

 

[Gear_Junkie]

Thanks

Zack,
With regulators that have a very high quality & good condition Internal seat/seals, they will hold plenum pressure even tho air pressure in HP side of system becomes zero.
Only when you cycle action and shoot it ( Empty ideally ) and plenum pressure drops under set point will you suddenly get a WHOSH of air pass threw the reg and back out the intake side as plenum pressure collapses.

Now regs that won't hold in the plenum charge as HP side is drained or bottle removed ... are telling there quality of seal is not ideal.

Thanks for the explanation Scott. Let me make sure I understand, as I can be pretty dense when it comes to understanding this stuff... Say I shoot the gun down to 10 - 20 BAR BELOW the reg set point. If I remove the bottle, the reg SHOULD still hold air, right?

Thanks!

 

[nervoustrig]

No, if the reservoir is already below the regulator’s setpoint, the reg’s seat is open and the plenum air will evacuate back toward the reservoir.

 

[Gear_Junkie]

Thank you guys for explaining this to me! This is great news as it means I don't need to replace the seals in the reg.

Thank you!

 

[Gear_Junkie]

Just as follow up, I bought the HUMA gauge that is supposed to work with the RAW HM1000X rifles. Unfortunately, this gauge DOES NOT work. The tip of the threaded end hits the reg before it can screw in all the way. It only screws in as far as the red line shown in the picture.

 

[Airgunmann]

Yeah my adapter I had to grind down to stay off the regulator

 

[Airgunmann]

The huma gauge would fit if the huma regulator was in place instead of the raw regulator it is quite a bit smaller than the raw but not as good as the raw reg the raw reg is a bit more consistent

 

[Gear_Junkie]

Good info, thanks! I might try to cut it down a bit - what did you use? And how did you keep the swarf out of the internals?

 

[Airgunmann]

I used a grinding wheel a blew it out with air pressure if it binds against the reg you won't get a proper reg setting reading I pulled my reg and slowly ground it down till I was flush with the inner threads when It was tightened down

 

[Airgunmann]

Keeping it out of the internals is tough I actually used a bench grinder too

 

[Gear_Junkie]

Thank you!