Installation guide BSA
Regulator installation guide for BSA models
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.
Remove the action out of the stock.
Place a piece of paint-tape on the optical center of the bottom side of pressure tube and
mark this with a straight line
Loosen both the breech screws a bit so there is a bit space between pressure tube and
breech. This prevents scratches on the tube when turning it loose.
(you may also remove breech totally)
Turn off the pressure tube. If it’s tight there could be pressure inside! Double check this.
When turned loose you can see the brass valve house
Unscrew the endcap of the valve house and take out the spring and restrictor.
Fill the the end of the valvecap with a (few) small metal rings. There must be a small part
brass sticking out where the spring will center on.
Remove the restrictor and screw the valvehouse back together
This is the right order to place the regulator and volume ring
Place the volume ring, regulator firmly against the valvehouse and put the pressure tube
below against the hammer house.
Mark on the paint tape the place of the decompression hole. This has to be between the two
o-rings of the regulator. So you have a big tolerance.
Gently clamp the pressure tube in a vice (use wood or cloth to prevent scratches) and center
the place where the hole has to come with a small centerdrill or if you don’t have this use a 1
or 2 mm drill.
Take a 1 or 2 mm drill and make the hole into the pressure tube
Remove tape and it should look like this
Debur the pressure tube very carfully on the inside. Use very fine grinding paper (600-1200)
This is very important otherwise the 0-rings will be damaged with placing the regulator.
Some bsa pressure tubes have small scratches in the length direction of the tube.
You can check this by removing the fillcap and look trough the tube into the light.
If you see these scratches then you have to polish the tube on the place the reg has to come.
You can do this easy by using a round stick of wood with some fine sanding paper on it.
Place it into a hand drill and polish the inside until the sides are nice and smooth.
Use silicone grease inside the tube and also grease the o-rings of the regulator.
Place the regulator inside the tube. Press
gently until the first o-ring is past the hole.
After that push in the volume ring.
Place the pressure tube back on the valvehouse and thighten it together.
This is all.
The regulator has a hole where you can put a M3 bolt into. So you can easy pull the
regulator out of the pressure tube if necessary.
Unscrew the endcap (there are 2 screws in it) and remove spring, hammerweight, rubber
ring.
Inside the end cap house there is a screw what can be used for setting the hammerspring
tension.
The endcap is glued to the housing. You can heat the housing to remove the end cap.
I usually clamp it in a vice and use a pillar with a piece of leather belt to prevent damage.
After that you can see the adjusting screw inside the housing.
Remove the extra hammerweight and rubber ring and mount it back together.
Now you can adjust the hammer spring tension from the outside.
Put the hammerspring and endcap back on the rifle.
Adjusting the pelletspeed.
If you follow these steps you will have pretty much a optimal balance between air-usage and
shotcount.
Remember the regulator will determine the maximum pelletspeed.
Fill the rilfe with air.
Turn in hammerspring to the maximum tension.
Do some shots and measure the pelletspeed.
If the speed is near to what you want then continue. If not, see below.
(If you get way to much speed, then lower the reg pressure a bit.
If you do not get enough pelletspeed then increase the reg pressure a bit.
You can in- or decrease it by setting the screw on top of the regulator conform the
instructions what came with it)
You could ease make yourself a tool with a broomstick etc. so you can set the pressure by
removing the fillcap of the rifle. So you do not have to dismantle the gun again.
Turn back the hammerspring tension and shoot and measure the speed. Keep doing
this until you see the pelletspeed decreasing.
Now you should have a pretty well balance.
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.
Remove the action out of the stock.
Place a piece of paint-tape on the optical center of the bottom side of pressure tube and
mark this with a straight line
Loosen both the breech screws a bit so there is a bit space between pressure tube and
breech. This prevents scratches on the tube when turning it loose.
(you may also remove breech totally)
Turn off the pressure tube. If it’s tight there could be pressure inside! Double check this.
When turned loose you can see the brass valve house
Unscrew the endcap of the valve house and take out the spring and restrictor.
Fill the the end of the valvecap with a (few) small metal rings. There must be a small part
brass sticking out where the spring will center on.
Remove the restrictor and screw the valvehouse back together
This is the right order to place the regulator and volume ring
Place the volume ring, regulator firmly against the valvehouse and put the pressure tube
below against the hammer house.
Mark on the paint tape the place of the decompression hole. This has to be between the two
o-rings of the regulator. So you have a big tolerance.
Gently clamp the pressure tube in a vice (use wood or cloth to prevent scratches) and center
the place where the hole has to come with a small centerdrill or if you don’t have this use a 1
or 2 mm drill.
Take a 1 or 2 mm drill and make the hole into the pressure tube
Remove tape and it should look like this
Debur the pressure tube very carfully on the inside. Use very fine grinding paper (600-1200)
This is very important otherwise the 0-rings will be damaged with placing the regulator.
Some bsa pressure tubes have small scratches in the length direction of the tube.
You can check this by removing the fillcap and look trough the tube into the light.
If you see these scratches then you have to polish the tube on the place the reg has to come.
You can do this easy by using a round stick of wood with some fine sanding paper on it.
Place it into a hand drill and polish the inside until the sides are nice and smooth.
Use silicone grease inside the tube and also grease the o-rings of the regulator.
Place the regulator inside the tube. Press
gently until the first o-ring is past the hole.
After that push in the volume ring.
Place the pressure tube back on the valvehouse and thighten it together.
This is all.
The regulator has a hole where you can put a M3 bolt into. So you can easy pull the
regulator out of the pressure tube if necessary.
Unscrew the endcap (there are 2 screws in it) and remove spring, hammerweight, rubber
ring.
Inside the end cap house there is a screw what can be used for setting the hammerspring
tension.
The endcap is glued to the housing. You can heat the housing to remove the end cap.
I usually clamp it in a vice and use a pillar with a piece of leather belt to prevent damage.
After that you can see the adjusting screw inside the housing.
Remove the extra hammerweight and rubber ring and mount it back together.
Now you can adjust the hammer spring tension from the outside.
Put the hammerspring and endcap back on the rifle.
Adjusting the pelletspeed.
If you follow these steps you will have pretty much a optimal balance between air-usage and
shotcount.
Remember the regulator will determine the maximum pelletspeed.
Fill the rilfe with air.
Turn in hammerspring to the maximum tension.
Do some shots and measure the pelletspeed.
If the speed is near to what you want then continue. If not, see below.
(If you get way to much speed, then lower the reg pressure a bit.
If you do not get enough pelletspeed then increase the reg pressure a bit.
You can in- or decrease it by setting the screw on top of the regulator conform the
instructions what came with it)
You could ease make yourself a tool with a broomstick etc. so you can set the pressure by
removing the fillcap of the rifle. So you do not have to dismantle the gun again.
Turn back the hammerspring tension and shoot and measure the speed. Keep doing
this until you see the pelletspeed decreasing.
Now you should have a pretty well balance.