Piusi MA Série Mode D'emploi page 62

A2
CAUTION
A4. Reassemble by repeating the previous sequence in reverse order. Tighten the
fixing bolts evenly.
Cleaning and/or replacement of balls and ball seats finishes here. You can now
reposition the pump and reconnect it as described in the previous sections.
P2 CLEANING AND REPLACING THE DIAPHRAGMS
For good operation of the pump and to guarantee that all the safety and protection
requirements against explosion risks have been taken, it is indispensable that the
controls, cleaning and/or replacement of the diaphragms are carried out in accordance
with the intervals shown in the table.
WARNING
OBLIGATORY
OPERATION
CONTROL AND
INTERNAL CLEANING
DIAPHRAGM
CHECK
DIAPHRAGM
REPLACEMENT
To replace product diaphragms proceed as follows:
WARNING
B1. Disassemble the intake and delivery manifolds by removing the fixing elements.
A3
check that there are no deposits of any kind inside
the pump, and if found remove them with a damp
cloth.
the diaphragms (in contact with the product or the
external ones) are highly subject to wear. Their
duration is strongly affected by the conditions of
use and by chemical and physical stress. Fields
tests carried out on thousands of pumps installed
with a head equal to 0 and with fluid at 18° C have
shown that normal service like exceeds 100,000,000
(one hundred million) cycles. For safety reasons, in
environments at risk of explosion, the diaphragms
must be replaced every 20,000,000 (twenty million)
cycles.
OPERATION TIME (nr. of cycles)
every 500.000
•
_
_
the components of the pneumatic exchanger,
including the shaft, are made from materials that
are not specifically resistant to chemicals. Should
the diaphragms break and the components come
into contact with the fluid, replace them completely.
A4
every 5 milion after 20
milion
• _
_ •
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