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Fig. 17

Casing A

(10) After the valves have been inserted into the casing A, cut off their respective pulling ends using

scissors or nippers. Secure casing B and valve chamber packing to casing A by the ﬁve screws.

This completes the valve replacement procedure, and use this assembly as a new casing block.

Fig. 19

Cut section

• When replacing the diaphragms, be sure to change the valves with new ones, too.

• When reinstalling the valves, take care to make sure that they are correctly ﬁt in the exhaust and

intake sides. Wrong orientation may result not only in performance decreasing but in a failure of

the pump.

• Tighten each of ﬁve screws gradually and uniformly till they are ﬁrmly fastened.

If they are not tightened uniformly, it may cause leakage of air or failure of pump.

Valve

Cut section

CAUTION

Fig. 18

Exhaust side

Fig. 20

Intake side

(Fig. 19 and 20)