Spare Parts; Cleaning - Packo AX Instruction Manual

6.3. Spare parts

For maintenance or repair use only original
spare parts. Only then a reliable operation can
be guaranteed and the certifi cates (machinery
directive, ATEX, 1935/2004 EC, ...) delivered
with the pump remain valid.

6.4. Cleaning

Pumps of the FP, PHP, CRP, PRP and FMS
series are designed for easy CIP-cleanability
(cleaning in place). Several tests have shown
they are as cleanable as a tube with the same
diameter of the pump inlet and a roughness Ra
= 0.8 µm.
Pumps are used for several liquids. This makes
it impossible to give a general valid CIP clean-
ing procedure. The following rule of thumb is
applicable: the fl ow rate during the CIP process
should be so high that the liquid velocity at the
inlet of the pump is at least 1.5 m/s. The pump
has to run during the CIP process and the drain
valve (if present) has to be opened from time to
time during the CIP process in order to clean
this valve. The effi ciency of the used cleaning
procedure has to be checked during the vali-
dation of the installation in which the pump is
incorporated. The following are some general
recommendations.
Cleansing media can cause burns!
Wear gloves and safety goggles.
It is important to check that the
internal seals of the pump are
resistant to the cleaning media. If steam is
used during one of the cleaning phases, the
pump must not run at the same time. Check
if the elastomers used are steam resistant.
In case of doubt, contact PACKO.
• Product expelling phase - With gas (N2 in
the pharmaceutical industry and CO2 in the
beverage industry) or liquid (water or solvent)
the rest of the product can be removed out of
the pump and piping. If the system is blown
empty with gas, the pump fi rst must be
switched off to prevent dry running.
When ordering spare parts always state the type
and serial number of the pump as indicated on
the nameplate. It is advisable to keep a mechan-
ical seal and O-rings in stock as a spare part,
which should be stored in a cool and dry space
without temperature fl uctuations.
• Pre-rinse - The pre-rinsing is done with hot
solvent or liquid (45 - 55°C) in the pharma-
ceutical respective food industry. In the food
industry, hot water prevents the dirt from
hardening (fat), whereas higher temperatures
lead to denaturizing of proteins, which are very
diffi cult to remove. Pulsating the liquid fl ow
(switching on and off the pump) can improve
the cleaning. The pre-rinsing liquid is nearly
always drained.
The pre-rinse can be undertaken with tap water
and is very important because it can remove
most of the dirt.
• Cleaning with detergent and alkali - This
cleaning phase has to remove the organic or
inorganic dirt based on the chemical or phys-
ical action of the detergent. The dirt has to be
de-solved in the cleaning liquid. The return
temperature is normally approximately 75°C
and the chemical concentration between 0.5
and 3 m % (e.g. 100 l of water + 2.2 l NaOH
of 33 %). Most of the dirt is loosened early in
this phase. The cleaning can be done with tap
water. Since the wash-step is based on the
solution of residual dirt, the temperature of the
water and detergent mixture is very important.
If sequentially an alkaline and acid cleaning
is used, normally there is a rinse in between.
• Acid cleaning - Acid cleaning is used for
removal of inorganic dirt and normally only
occasionally necessary. Often, inorganic acids
(e.g. HNO3) are used with a concentration
between 0.5 and 3 m %. The temperature is
less than 65°C. Afterwards a rinse is done
with lukewarm water.
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