Vmac VR150, Owner'S Manual, Page: 24 / 48

VMAC
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Vehicle Mounted Air Compressors
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Fax: 1-250-740-3201
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Adjusting the Pressure Regulator
The pressure regulator is adjusted to limit maximum pressure to a
safe level. Because pressure and flow are related, this adjustment is
also very important for optimum performance. You cannot
accurately adjust system flow by using the pressure regulator.
1. Install the test tool in the tank outlet with the ball valve closed.
2. Make sure that the oil level is correct and the system is at
operating temperature.
3. Operate the system until it reaches full pressure. Observe the
pressure on the gauge.
4. Loosen the adjusting screw lock nut on the regulator.
5. Pressure can be adjusted within a range of 145-175 PSI / 999.7
KPA
– 1307 KPA, depending on your requirements.
Prolonged operation above 175 PSI / 1307 KPA may
damage the pressure regulator.
Never adjust the pressure cutout to exceed 175 PSI /
1307 KPA. 200 PSI / 1379 KPA will result in activation of
the pressure relief valve at the air/oil tank. Rapid air
loss will occur which may cause component damage,
injury, or death.
6. Rotate the adjustment bolt clockwise to increase pressure.
Rotate counterclockwise to decrease pressure. Tighten the lock
nut.