PowerVac® P Vacuum Relief Valve Test and Repair
The Vacuum Relief Valve:
•Regulates the vacuum pressure in the PowerVac® .
•Has a 1" NPT male fitting on one side and 1" NPT female fitting on the other side.
•Is located on top of the separator tank in the "T" Fitting on Single Models and in the center of the mounted "T" assembly on the Twin Models.
•Is adjustable up to 18"Hg. Recommended range for the system vacuum is from 10" to 18"Hg. The valve is preset at the factory for 12" Hg.
Vacuum Relief Valve Adjustment
1.Turn power off.
2.Remove the filter and valve by unscrewing from tee-fitting.
3.Adjust the center mounted screw inside the valve.
Use 1/4 inch nutdriver and phillips screwdriver. Each full clockwise turn increases the vacuum level by approximately 2 inch Hg.
4.Install filter and valve.
Recommended Range is 10” Hg - 18" Hg. Vacuum is preset at 12” Hg. If reading is low, check for leaks or open operatory lines.
Vacuum Relief Valve Replacement
1.Turn power off.
2.Unscrew valve from tee-fitting. Unscrew valve from filter.
3.Screw filter onto valve. Screw valve assembly into tee-fitting.
4.Turn power on.
5.Perform Adjustment. Refer to: Vacuum Relief Valve Adjustment section above.
