Preventive Maintenance
Leak Test and Pump Checkout
Thermo Fisher Scientific
Model 49
i
Instruction Manual
5-7
3. Remove the four screws from the top plate, remove top plate, flapper
valve, and the bottom plate.
Figure 5-2.
Rebuilding the Pump
4. Remove the screw the securing the diaphragm to piston and remove
diaphragm.
5. Assemble the pump by following the previous steps in reverse, make
sure the Teflon® (white) side of the diaphragm is facing up and that the
flapper valves cover the holes of the top and bottom plate.
6. Perform “Leak Test and Pump Checkout” procedure that follows.
Leak Test and Pump
Checkout
Use the following procedures to test for system leaks and checkout the
pump.
External Leaks
Use the following procedure to test for leaks around the fittings.
1. Disconnect the SAMPLE input line and plug the SAMPLE fitting.
Top Plate
Flapper Plate
Bottom Plate
Diaphragm
Содержание 49i
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