User Manual

page 41 of 51

➨ Position new diaphragm (F) between dia-

phragm clamping disc with square head

screw (E) and diaphragm support disc (G).

+ Note: This is a double diaphragm consist-

ing of two single diaphragms! Put the two

diaphragms together with the printed sides

outwards.

+ Make sure that the square head screw of the diaphragm clamping disc

is correctly seated in the guide hole of the diaphragm support disc.

➨ Lift the diaphragm at the side. Place the diaphragm carefully together

with diaphragm clamping disc and diaphragm support disc in the dia-

phragm key.

+ Avoid damage of the diaphragm: Do not excessively bend or crease

the diaphragm.

+ Assemble the original number of washers

(H) between diaphragm support disc (G)

and connecting rod (I).

➨ Screw diaphragm clamping disc (E), dia-

phragm (F), diaphragm support disc (G),

and washers (H) to connecting rod (I).

➨ Optimum torque for the diaphragm support disc: 4.4 ft

(6 Nm), it is

recommended to use a torque wrench. Attach Allen key to diaphragm

key (hexagonal bolt 6 mm wide).

Note: Never use the diaphragm key with any additional tools like tongs

or Allen keys without appropriate torque limitation.

Assembling the pump heads

➨ Bring the diaphragm (F) into a position, in which it is in contact with the

housing (J) and centered with respect to the bore.