The (new) Crosman Forum, your first and last stop for all things Crosman

 photo 63f5b325-0274-4312-9dbd-2effde5b3715_zps0x27orls.jpg

Alan Alford's build

2250b Tube for later move to bulk CO2.
12" .22 Caliber Barrel from Doomsday Backpacker
Brian & Assoc. Alluminum Breech with 2 barrel screws
Original site rear
Pin site on Custom Mt. Airguns Muzzle Break
2x1 Centerpoint Scope with UTG dovetail adapters
Mountain Airguns Custom Bolt and Handle
Mountain Airguns Custom Power Adapter and spring guide
B&A Boss Valve for extra Power

Built mainly for fun and to shoot at local Field Trial Pistol Match.

It currently it shoots a 14.3 Crosman Hunting Pellet at about 530 fps in a 72 degree room for 8.92 FPE.



 Return to Index  

Just retain the valve and you're good to go....

February 17 2011 at 5:36 PM
robert  (Login gubb33ps)
Crosman Forum Member
from IP address 68.105.50.68


Response to i think you're right about that

.... because the HiPac unit contains the pressure, the force pushing the valve rearward would be based on the area INSIDE the valve, not the outside diameter of the valve.

If you ignore the instructions and over tighten the unit into the tube, can exert screw snapping pressure much greater than any reasonable air pressure could manage. With the seals given in the conversion, firm hand pressure has sealed 2.8K just fine (although that was just an experiment... my two are set to run right at 140bar.

IF they don't seal by hand pressure, much better to investigate why rather than reaching for a wrench.

[IMG][linked image][/IMG]
[IMG][linked image][/IMG]

 
 Respond to this message   
Responses

Crosman Corporation 1-800-724-7486
This forum is not affiliated with the Crosman Corporation in any way// Information presented in this forum is intended for informational purposes only; use at your own risk//Posts made to this forum are soley the opinion of the individual member