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MEGA 120D PUMP OPERATION / MAINTENANCE MANUAL
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Lift the slave head and body, while maintaining compression of the main seal, flip the
head and body over and insert the tie bolts into the master head. Ensure that the
main seal of the master head is not dislodged.
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Place all bushings & flat washers onto tie bolt threaded ends.
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Install flange nuts onto tie bolts, tighten evenly in a star pattern (do not overload one
side before applying torque to another as dislodgment of main seal can occur); final
torque is 80 in-lbs.
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Snap in tie bolt caps.
4.9 TESTING
4.9.a Performance Test
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With the air supply at 0 psi open the air supply valve
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Increase the air pressure until the pump starts to cycle
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Record the start pressure, Target = <20psig
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Pump must prime once even cycling is achieved
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Increase pressure to 80 psi
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Check for fluid leaks, listen for air leaks, check for irregularity
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Close the discharge valve and deadhead for 2 minutes
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Pump must not experience jog, erratic cycling or leaks
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Open discharge valve and expel the remaining DI water
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Prepare the pump for drying
4.9.b Dry Pump
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Connect vacuum hose to discharge line
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Connect purge line to fluid inlet
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60 psig Supply Pressure
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Cycle pump & vacuum dry by rotating pump side to side for 30 seconds.
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Turn off Air Supply and allow the pump to purge for 5 minutes.
4.9.c Dry Suction
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20 psig Supply Pressure Target
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Record Suction Value
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Target = 10 in-Hg.
