Valve Repair; Double Ball Valves - ProMinent Makro/ 5 Operating Instructions Manual

Repairs
12.2

Valve repair

12.2.1

Double ball valves

Cleaning a discharge valve
40
17. Start the pump and tighten the screws crosswise at a 100%
stroke.
Tightening torque
18. Position the protective cover (5) on the backplate (6).
Check the tightening torque of the screws after 24-
–
hours' operation.
– With PP dosing heads, recheck the tightening
torque again after three months.
Unsuitable spare parts for the valves may lead to prob‐
lems for the pumps.
Only use new components that are especially
–
adapted to fit your valve (both in terms of shape
and chemical resistance).
Use the correct spare part kits. In case of doubt,
–
refer to the exploded views and ordering informa‐
tion contained in the "Supplementary information
CD for ProMinent
Clean the discharge and suction valves only one after
another as they cannot be differentiated using the
arrow markings.
Taking the discharge valve apart
1. Unscrew the discharge valve from the dosing head and rinse
out.
2. Dismantle the discharge valve.
3. Rinse and clean all parts.
4. Replace the worn parts and seals.
Assembling the discharge valve
30 Nm
pump operating instructions".
®