Operator's manual

Gas sampling and gas conditioning technology 6-1.3.5-ME

14.1 REPLACING DIAPHRAGMS, VALVE PLATES AND SEALING RINGS

Figure 4 shows a sectional drawing of the pump head.

Positioning

the cup

spring 11

Figure 3 Section drawing of pump head MP30

Replacing the diaphragm:

 Mark position of pressure plate 15, head cover 4, intermediate plate 1 and housing 14 by making a

continuous line with a felt-tip pen.

 Loosen four head screws 5.

 Remove pressure plate 15, head cover 4 and intermediate plate 1 from pump housing.

 Loosen four fixing screws in impeller cover 13 and remove.

 Bring diaphragm 8 into top position by turning impeller 12;

 Unscrew diaphragm on side edges anticlockwise.

1 Intermediate plate

2 Valve plate

3 Sealing ring

4 Head cover

5 Screw

6 Screw cap

7 Screw

8 Diaphragm

9 Supporting cup

10 Adjusting washers

11 Cup spring

12 Impeller

13 Impeller cover

14 Housing

15 Pressure plate

M Mark