Huma-air bt65, AT44, FX, S200, P10 Installation Manual

Regulator installation guide BT65/AT44/FX/S200/P10/P12

Before you you start, realize this;

 You are working on a high pressure rifle; this could potentially be harmful

to you or bystanders if you do not know what you are doing.

 Do not attempt to install this regulator yourself if you do not have a clear

understanding of how these pcp rifles and regulators work.

 Installation and operation is done completely at your own risk.
 Installing this regulator might void your rifle’s factory warranty.
 We cannot be held liable for any accidents in relation to this regulator and its

installation.

Before you start, make absolutely sure that ALL the air is drained from the pressure
tube. If there is a pressure gauge, it will give you just an indication. Dry fire the rifle to
make sure all the air is out of the rifle.

Method 1:

Drain the pressure tube/air cylinder completely by dry firing or opening the valve,

Remove the pressure tube/air cylinder from the action of the rifle,

Check that the air has been completely drained by pressing on the cylinder valve,

Unscrew the valve body from the pressure tube/air cylinder,

Remove the large 0 ring from the valve body and tighten the firing valve screw completely,

Make sure the valve body and threads are clean and free of grease and oil,

Make sure the inside of the pressure tube has no scratches or dirt inside it,

Lightly grease the first 7 cm of the pressure tube with silicone grease,

Carefully push the regulator into the pressure tube as shown in the picture below,

Make sure the O-rings are properly seated in the grooves on both sides of the shim/spacer,

Slide the shim/spacer into the pressure tube behind the regulator that you have already
fitted. Carefully push the regulator and shim/spacer past the threads in the pressure tube,

Grease the end face of the valve body with some silicone grease so that the O ring can't be
twisted out of the chamber.

Screw the valve body into the pressure tube, then back it off a tiny bit (the thickness of a
piece of paper). This allows the regulator to vent, which allows it to operate normally.

Slowly fill the pressure tube and check for leaks,

Once you are sure it is not leaking, screw the pressure tube/air cylinder back into the action,

Take about 10-15 seconds between each shot to allow the regulator to reset,