M&C TechGroup MP47_D Operator's manual - Manual (Page 19)

19
Gas sampling and gas conditioning technology 6-1.1.1-ME

Loosen the 4 screws M and remove the cover N ;

Screw the new diaphragm K into the rod L hand-tight;
 Turn the flywheel P until the rod L is in a central position. Control that the bulge of the dia-
phragm K fits to the groove of housing A ;

Fix the diaphragm head B and the pressure plate C according to the mark;

Fix the 4 hexagon scews H constantly over cross until the plate springs R are flat;

Turn the flywheel P and check whether it works proper;
 Mount the cover N ;
18.2 EXCHANGE OF THE VALVE PLATES
 Loosen the 6 hexagon screws D and remove the pressure ring E ;

Change the o-ring S at the valve body F on the pressure side;

Change the valve plate T . Check whether the protection ring U is in the right position and the
6 layers of the valve plate T point to the top;

Screw in the valve bodies F and tighten them in a moderate way;

Change the o-ring S on the sucking side;

Remove the valve plate T and change it with a new one. Check whether the protection ring U
is in the right position and the 6 layers of the valve plate T point to the bottom;

Screw in the valve bodies G and tighten them in a moderate way;

Put on the pressure ring E and tighten the 6 hexagon screws.
18.3 CLEANING

When changing valve plates and diaphragm, inspect all parts for dirt before assembling the
pump head and clean them if necessary.

As far as possible clean the parts with a dry cloth. Solvents should not be used as they can
attack the plastics and synthetic rubber parts. If a compressed air line is available, blow the
parts out with it.
W A R N I N G !
Aggressive medium is possible.
Wear protective glasses and proper protective clothing during
disassembly, repair or cleaning!