Ninja V2 User manual

© 2010-2023 Pressure Specialist Inc. © 2010-2023 Pressure Specialist Inc.
© 2010-2023 Pressure Specialist Inc. © 2010-2023 Pressure Specialist Inc.
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
ENTIRET.
WARNING: The paintball tank must have a
regulator, which regulates the air source the optimal
regulator output is 500 psi. Ninja offers a full line of air
systems, visit www.ninjapaintball.com
April 2023
NINJA LOW-PRESSURE
REGULATOR V2 OWNER’S MANUAL
Part number: NINJA-LPRV2
The Ninja LPRV2 is a low pressure regulator
for Airsoft markers.
• Construction: Aluminum.
• Inlet Pressure: Max 1000 PSI.
• Adjustment Range: 0 -160 PSI.
• Resetting Relief Valve: 140-150 PSI.
(NOT SERVICEABLE DO NOT
REMOVE OR TAMPER WITH).
• Lubrication: Any Silicone based,
NON-PETROLEUM LUBRICANT.
• Adjustment: 3/16” Allen wrench.
• Tournament Legal: Can be locked out with a zip tie.
• Pressure Gauge: 0-160 PSI.
• Piston: 015-90 red urethane oring for ease of maintenance.
• Break In Period: 1000-3000 Cycles.
• Maintenance kit included (Quantity (2) of #7 red O-ring 015)
The Ninja LPRV2 is designed to be used with a standard
regulated paintball air source, available in 3000 and 4500 psi
bottles.
B
D
E
A
F
C
Features:
A. Pressure adjustment.
B. Tournament Lock zip tie holes.
C. Maintenance only access lock set screw.
D. Pressure Relief Valve assembly.
E. Low Pressure Reference Gauge.
F. Low Pressure Quick Disconnect.
QUICK START GUIDE (reference figure 1):
• 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 specifica-
tions 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.
• Using small 5° Clockwise adjustments (right hand) to
increase velocity and verify using a chronograph.
• Small Counter Clockwise adjustments to reduce velocity
must be followed by several clearing shots.
• If 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 LPRV2
smoothly and de-gas with a small vent of air after unthread-
ing two full turns and before three full turns are completed.
Figure 1

WARNING: The cylinder valve can fly off with
enough force to kill if the valve unscrews from the cylin-
der. 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.
WARNING: THE LPRV2 RESETTING PRES-
SURE RELIEF #1-4 IS NOT USER SERVICABLE. DO NOT
REMOVE OR TAMPER WITH THE LPRV2 PRESSURE
RELIEF.
WARNING: NEVER OPERATE OR ADJUST THE
LPRV2 WITH THE MAINTENANCE SET SCREW #12
LOOSE OR REMOVED. NEVER ATTACH AN AIR SOURCE
WITH THE LPRV2 CAP #13 NOT FULLY INSTALLED WITH
THE MAINTENANCE SCREW #12 FIRMLY INSTALLED. IF
THE LPRV2 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.
WARNING: THIS IS NOT A TOY IMPROPER
USE CAN RESULT IN INJURY OR DEATH DO NOT USE
THE LPRV2 PRIOR TO READING THIS MANUAL IN ITS
ENTIRET.
NOTE: COMPONENT COLOR FOR ILLUSTRATION PURPOSES ONLY
ACTUAL PRODUCT COLOR MAY VARY.
PARTS DIAGRAM:
1. LPRV2 Pressure Relief Housing
2. LPRV2 Pressure Relief Spring
3. LPRV2 Pressure Relief Piston
4. LPRV2 Pressure Relief Piston 009-70 Buna O-ring
5. LPRV2 Low Pressure Gauge
6. LPRV2 Body
7. LPRV2 Piston 015 – 90 Red Urethane O-ring
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
1
2
3
4
12
10
11
13
9
6
5
7
8
MAINTENANCE AND SERVICE (reference figure 2):
Maintaining the Ninja LPRV2 for optimum performance
requires occasional Piston O-ring #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, LPRV2 adjuster #11, LPRV2
Maintenance set screw #12.
Figure 2
Figure 3
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 Mainte-
nance 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
LPRV2 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 O-ring with
silicone grease.
© 2010-2023 Pressure Specialist Inc. © 2010-2023 Pressure Specialist Inc.
© 2010-2023 Pressure Specialist Inc. © 2010-2023 Pressure Specialist Inc.

REASSEMBLY (reference figure 2):
1. Reinsert LPRV2 piston # 9 pin- side first. Be certain the pin
enters the center hole (Figure 3: X)
2. Reinsert LPRV2 Main Spring #10, roughly center the
spring on the piston.
3. Verify the LPRV2 Adjuster is fully threaded into the LPRV2
Cap, fully turned counterclockwise.
4. Thread, clockwise, the LPRV2 Cap onto the LPRV2 Body
NO GAP BETWEEN LPRV2 BODY AND LPRV2 CAP.
5. Reinstall the LPRV2 Maintenance Access Locking set
screw #12, DO NOT OVER TIGHTEN!
6. Re-chronograph using the quick start guide in this manual.
Figure 4
© 2010-2023 Pressure Specialist Inc.