9
8. Adjust the pump sealant inlet valve on units with sealant circulating pumps such that the compound pressure
gauge between the pump sealant inlet and valve reads in a range between 15” Hg vacuum (-50 kPa g) and
10” Hg vacuum (-35 kPa g).
For systems where the liquid ring pump(s) circulate the sealant, adjust the pump sealant inlet valve such that
the compound pressure gauge between the pump sealant inlet and valve reads in a range between 10” Hg
vacuum (-35 kPa g) and 0” Hg vacuum (0 kPa g).
9. Check the sealant level in the separator tank and add sealant as necessary. Some systems may be
equipped with optional automatic sealant level control to handle this.
10. Check that the sealant flush to the mechanical seals is adequate by feeling the seal casing at each end of the
pump (ahead of the bearings). You should be able to hold your hand on it with water sealed systems and for
oil sealed systems it should be close to the oil sealant temperature.
WARNING:
Make certain all coupling or belt guards are correctly installed and secured in place before
touching any part of the pump. Failure to make sure that guards are correctly installed and
secured in place can result in serious bodily injury.
11. If equipped with an oil mist eliminator (OME), check that sealant is being returned from the OME to the pump
by feeling the return line. It should be warm to the touch, indicating return of sealant.
12. On special systems, check that all solenoid valves, flow, level, or pressure switches function properly.
13. After 30 minutes of operation, check the sealant temperature at the inlet and outlet points of the heat
exchanger to be sure it is functioning properly. On oil sealed systems, a temperature modulating valve is
provided on the coolant side of the heat exchanger. It can be adjusted to maintain the oil temperature
between 115 – 180 °F (45 – 80° C) (higher settings are available – consult factory if higher settings are
required) by turning the adjustment screw in the direction of the arrow (counterclockwise) for higher oil
temperatures.
14. On duplex systems repeat the above procedure with the alternate pump.
After completing the iinitial startup procedure, of the entire system, it may be placed in process.
Figure 1. Typical Vacuum Switch Settings
” Hg
22
23
24
25
26
27
28
29
29.92
mbar
745
779
813
847
880
914
948
982
1013
Duplex
” Hg
22
23
24
25
26
27
28
29
29.92
mbar
745
779
813
847
880
914
948
982
1013
Simplex
Pump on
Pump off
One Pump on (alternates
between pumps 1 & 2)
Pump(s) off
Both Pumps on