ProMinent Makro TZ Operating Instructions Manual page 31

ProMinent ®
1
2
3
4
5
Fig. 21
Unscrew the hydraulic connections of the discharge and suction side.
Slacken the locking screw and take the protective cover off the spacer.
Screw the diaphragm rupture indicator out of the dosing head.
Screw the bush (3) out of the dosing head.
Remove the safety piston (1) with the spring (2) from the dosing head.
Slacken the bolts (4) on the armoured disc.
Remove the dosing head with the bolts from the spacer (8).
Unscrew the diaphragm (2) from the connecting rod (6) and remove it.
Clean the sealing surfaces.
Smear a little thread locking gel on the threads of the diaphragm connecting rod screwed
connection.
Screw the new diaphragm (2) onto the connecting rod (6) up to the stop – this must be done
successfully as otherwise the pump will not dose accurately afterwards.
Fit the dosing head (1), the armoured disc (3) and the head disc (9) on the spacer (8).
Fit the bolts.
Push the safety piston (1) with the spring (2) into the channel of the dosing head.
Screw the bush into the dosing head (O-ring (4)!) and tighten hand-tight.
Screw the diaphragm rupture indicator into the dosing head until hand-tight.
NOTICE
Make sure that the safety piston (1) and its pin can move freely!
Otherwise the diaphragm rupture sensor can fail later on!
Start the pump and tighten the bolts in opposite pairs at 100 % stroke
(tightening torque 30 Nm).
Fit the protective cover on the spacer (8) and screw in the locking screw.
NOTE
Check the tightening torque of the bolts after 24 hours operation!
In addition, with PP dosing heads, re-check the tightening torques after 3 months!
1 Safety piston
2 Spring
3 Bush
4 O-ring
5 Expandable position on
composite diaphragm
Repair
Page 31