Micropump GN Series Installation, Operation and Warranty Information - Manual (Page 16)

16
DOC No: 7046 REV G
Bypass (Optional)
Bypass Valve Adjustment
The optional bypass valve is an internal relief valve that permits recirculation of the
working fluid when a pre-set pressure is reached. The bypass can be activated from
0.7 bar (10 psi) to the maximum differential pressure of the pump. The bypass can be
adjusted in situ while the pump is operating by rotating the adjusting screw with the
hex key provided. Turn the screw clockwise to increase the pre-set pressure and anti-
clockwise to decrease the pre-set pressure.
Micropump recommends the pumps are not operated continuously with 100%
bypass recirculation.
-
+
Micropump P/N 4973
OR
Micropump P/N 5636 SEAL SCREW - DO NOT LOOSEN
BYPASS SCREW - ADJUST AS NOTED
Pumps equipped with internal bypass will recirculate fluid increasing
the amount of fluid through the bypass, which will increase the heat
produced. Ensure when operating at bypass conditions that the pump
does not exceed flash point temperature of area or pumping liquid.
Loosening the seal screw of the internal bypass will cause a leak, which
may cause an unsafe condition. Do not loosen the seal screw.