M&C TechGroup MP47-Z-BPR150 Operator's manual - Manual (Page 16)

16
Gas sampling and gas conditioning technology 6-1.1.7-ME

Valve plates, sealing rings (2 per each pump head) and structured diaphragms (1 per pump
head) according to spare parts list, chapter 17.
N O T E !
It is recommended to change the valve plates and diaphragms always
at the same time.
Change the diaphragm(s) and the valve plates in the following sequence:
15.1 CHANGE OF THE PUMP DIAPHRAGM

Mark the position between the housing A , the diaphragm head B and the pressure plate C
with a pencil.

Loosen the 4 hexagon screws H and remove the pressure plate C and the diaphragm head B.

Unscrew the diaphragm K by hand out of the tapping hole of the rod L (counter-clockwise).

Loosen the 4 screws M and remove the cover N.

Screw in the new diaphragm K into the rod L and tighten by hand.

Turn the fly wheel P until rod L is in central position. Control that the bulge of the diaphragm K
is placed inside the groove of the housing A.

Put on the diaphragm head B and the pressure plate C according to the pencil marks. Tighten
the 4 hexagon screws H crosswise until the disc springs R are flat. Control the easy running
when turning the disk flywheel P and mount the cover N.
15.2 CHANGE OF THE VALVE PLATE

Loosen the 6 hexagon screws D and remove the pressure rings E . Loosen the valve bodies F
and G .

Replace the O-ring S on the valve body F (pressure side) by a new one. Remove the valve
plate T and replace it by a new one. Take care that the protection ring U is placed in the right
position and that the 6 supports of the valve plate T show upwards. Screw the valve body F in
again and tighten moderately.

Replace the O-ring S on the valve body G (suction side) by a new one. Remove the valve
plate T and replace it by a new one. Take care that the protection ring U is placed in the right
position and that the 6 supports of the valve plate T show downwards. Screw the valve body G
in again and tighten moderately.

Put on the pressure rings E and tighten the 6 hexagon screws D.