ProMinent Sigma 1 Supplementary Operating Instructions page 23
Pumps with hygienic pump head
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Also See for Sigma 1:
- Supplementary instructions manual (8 pages) ,
- Operating instructions manual (96 pages) ,
- Operating instructions manual (100 pages)
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Tightening torques
Stage 1
25%
1.
Drain the liquid end: purge the liquid end and then flush using
a suitable medium.
2.
With the pump running, move the stroke adjustment dial to
the stop at 0% stroke length.
ð The drive axle is now difficult to turn.
3.
Switch off the pump.
4.
Remove the small single-hinge clamps and separate the
hydraulic connectors from the discharge and suction side.
5.
Unscrew the diaphragm rupture sensor from the dosing
head.
6.
Suspend the dosing head from lifting straps, if necessary.
7.
Remove the 4 or 6 screws on the very heavy dosing head.
8.
Remove the very heavy dosing head.
9.
Check the condition of the diaphragm rupture sensor, see
Ä Chapter 10 'Checking the condition of the diaphragm rup‐
ture sensor' on page 25 .
10.
Clean all components, adapted to the conditions subse‐
quently required.
11.
When re-assembling, note the direction of flow and replace
all seals. When doing so, take the specification of the seals
into consideration.
The O-rings must lie deeply in their grooves.
Place the dosing head with the screws onto the diaphragm.
The suction connector should be pointing downwards when
the pump is in its fitting position.
12.
Initially slightly tighten the screws, then tighten crosswise to
25% of the tightening torque (note the laser engraving), see
Ä 'Tightening torques' on page 23 .
13.
Screw the diaphragm rupture sensor into the dosing head.
14.
Start the pump and adjust the stroke length to 100%.
15.
Stop the pump and tighten the screws crosswise to 100% of
the tightening torque. For the tightening torque, see
ening torques' on page 23 .
16.
Start the pump and check its leak-tightness with water at
maximum pressure.
The liquid end may leak if the tightening torque of the screws
is not checked.
Check the tightening torque of the screws after 24 hours
n
of operation.
Tightening torque of dosing head screws: note the laser engraving
on the surface of the dosing head.
Tighten the dosing head screws crosswise in 2 torque stages:
Stage 2
100%
Replacement and checking
Ä 'Tight‐
23
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