NINJA LPRV2 LOW PRESSURE REGULATOR MADE IN USA
If you have any questions or require help please call our 877-NINJA-USA (646-5287) for assistance.
186 Virginia Rd, Crystal, Lake, IL 60014 Ph: 877-NINJA-USA (646-5287)
2
Quick start guide:
Verify Adjuster (Figure 1: A.) is at the maximum, turning counter clockwise until it stops, using a
3/16 Allen (hex) key.
Completely attach the regulated air source with a verified output pressure of 500 psi.
The pressure gauge is for reference only. The velocity should be set following the engine
manufacturers specifications utilizing a chronograph designed for airsoft use.
Rotating the adjuster CLOCKWISE will INCREASE the output pressure.
Rotating the adjuster COUNTER CLOCKWISE will DECREASE the output pressure.
In General, increasing the output pressure will increase the velocity of the airsoft engine.
oUsing small 5° Clockwise adjustments (right hand) to increase velocity and verify using a
chronograph.
oSmall Counter Clockwise adjustments to reduce velocity must be followed by several
clearing shots.
oIf the air pressure is increased beyond the factory Resetting Pressure Relief Valve
(Figure 1: D.) set point (140-150psi), the Resetting Pressure Relief Valve will begin to
vent. Quickly turn the adjuster at least one full turn Counter Clockwise to decrease the
pressure output and the Resetting Pressure Relief Valve will reset.
Due to the Ninja LPRV2 design, the air source tank and regulator should turn easily, unthread
from the Ninja LPR smoothly and de-gas with a small vent of air after unthreading two full turns
and before three full turns are completed.
The cylinder valve can fly off with enough force to kill of the valve unscrews from the cylinder. LOOK
at valve when removing cylinder.
STOP if the valve starts to unscrew from the cylinder. Screw it back on and contact the manufacturer
for Instructions to repair.
NINJA LPRV2 LOW PRESSURE REGULATOR MADE IN USA
If you have any questions or require help please call our 877-NINJA-USA (646-5287) for assistance.
186 Virginia Rd, Crystal, Lake, IL 60014 Ph: 877-NINJA-USA (646-5287)
3
WARNING: THIS IS NOT A TOY IMPROPER USE CAN RESULT IN INJURY OR DEATH DO NOT USE THE LPR
PRIOR TO READING THIS MANUAL IN ITS ENTIRETY
NOTE: COMPONENT COLOR FOR ILLUSTRATION PURPOSES ONLY ACTUAL PRODUCT COLOR MAY VARY
Figure 2.
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4 5
6 7
12
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10
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1. LPRV2 Pressure Relief Housing
2. LPRV2 Pressure Relief Spring
3. LPRV2 Pressure Relief Piston
4. LPRV2 Pressure Relief Piston 009-70 Buna Oring
5. LPRV2 Low Pressure Gauge
6. LPRV2 body
7. LPRV2 Piston Oring 015 –90 Red urethane
8. Low Pressure Fosters Quick Disconnect
9. LPRV2 Piston
10. LPRV2 Main Spring
11. LPRV2 Adjuster
12. LPRV2 Maintenance Access Locking set screw
13. LPRV2 Cap
NINJA LPRV2 LOW PRESSURE REGULATOR MADE IN USA
If you have any questions or require help please call our 877-NINJA-USA (646-5287) for assistance.
186 Virginia Rd, Crystal, Lake, IL 60014 Ph: 877-NINJA-USA (646-5287)
WARNING NEVER OPERATE OR ADJUST THE LPRV2 WITH THE MAINTENANCE SET SCREW #12 LOOSE
OR REMOVED.
NEVER ATTACH AN AIR SOURCE WITH THE LPR CAP #13 NOT FULLY INSTALLED WITH THE
MAINTENANCE SCREW #12 FIRMLY INSTALLED. IF THE LPR CAP IS LOOSE OR REMOVED THE LPRV2
PISTON IS UNDER PRESSURE AND CAN TRAVEL AT VELOCITIES, WHICH MAY CAUSE PERSONAL INJURY
TO THE USER OR BYSTANDERS.
MAINTENANCE & SERVICE:
Maintaining the Ninja LPRV2 for optimum performance requires occasional Piston Oring #7
replacement.
Replacing and silicone greasing oring #7 will solve a number of common air pressure regulation issues:
1. Inconsistent pressure output.
2. Slow loss of pressure while under pressure but not using the regulated air.
3. Slow recharging of set pressure.
4. Leaking from LPRV2 cap #13, LPR adjuster #11, LPR Maintenance set screw #12.
WARNING THE LPRV2 RESETTING PRESSURE RELIEF #1-4 IS NOT USER
SERVICABLE. DO NOT REMOVE OR TAMPER WITH THE LPR PRESSURE RELIEF
DISASSEMBLY: Reference figure 2
1. Remove Air Source.
2. Using a 3/16” Allen (hex) key rotate the LPRV2 Adjuster #11 fully Counter Clockwise.
3. Using a 5/64” Allen (hex) key remove the LPRV2 Maintenance Access Locking set screw #12 by
rotating Counter Clockwise using a flat, non-ball end of the Allen.
4. Rotate LPRV2 cap #13 Counter Clockwise to remove LPR cap and Adjuster.
5. Remove LPRV2 Main Spring #10
6. Remove LPRV2 Piston #9 by light pressing an Allen key through the center hole on the Air Source
Attachment side (Figure 3: X)
7. Remove and replace oring #7, lightly lube the oring with silicone grease.
Figure 3
x
NINJA LPRV2 LOW PRESSURE REGULATOR MADE IN USA
If you have any questions or require help please call our 877-NINJA-USA (646-5287) for assistance.
186 Virginia Rd, Crystal, Lake, IL 60014 Ph: 877-NINJA-USA (646-5287)
4
WARNING NEVER OPERATE OR ADJUST THE LPRV2 WITH THE MAINTENANCE SET SCREW #12 LOOSE
OR REMOVED.
NEVER ATTACH AN AIR SOURCE WITH THE LPR CAP #13 NOT FULLY INSTALLED WITH THE
MAINTENANCE SCREW #12 FIRMLY INSTALLED. IF THE LPR CAP IS LOOSE OR REMOVED THE LPRV2
PISTON IS UNDER PRESSURE AND CAN TRAVEL AT VELOCITIES, WHICH MAY CAUSE PERSONAL INJURY
TO THE USER OR BYSTANDERS.
MAINTENANCE & SERVICE:
Maintaining the Ninja LPRV2 for optimum performance requires occasional Piston Oring #7
replacement.
Replacing and silicone greasing oring #7 will solve a number of common air pressure regulation issues:
1. Inconsistent pressure output.
2. Slow loss of pressure while under pressure but not using the regulated air.
3. Slow recharging of set pressure.
4. Leaking from LPRV2 cap #13, LPR adjuster #11, LPR Maintenance set screw #12.
WARNING THE LPRV2 RESETTING PRESSURE RELIEF #1-4 IS NOT USER
SERVICABLE. DO NOT REMOVE OR TAMPER WITH THE LPR PRESSURE RELIEF
DISASSEMBLY: Reference figure 2
1. Remove Air Source.
2. Using a 3/16” Allen (hex) key rotate the LPRV2 Adjuster #11 fully Counter Clockwise.
3. Using a 5/64” Allen (hex) key remove the LPRV2 Maintenance Access Locking set screw #12 by
rotating Counter Clockwise using a flat, non-ball end of the Allen.
4. Rotate LPRV2 cap #13 Counter Clockwise to remove LPR cap and Adjuster.
5. Remove LPRV2 Main Spring #10
6. Remove LPRV2 Piston #9 by light pressing an Allen key through the center hole on the Air Source
Attachment side (Figure 3: X)
7. Remove and replace oring #7, lightly lube the oring with silicone grease.
Figure 3
x
