Wilden PX4 series, Инженерия, эксплуатация и обслуживание, Страница: 35 / 43

WIL-12310-E-04
33 WILDEN PUMP & ENGINEERING, LLC
The design of the PX8 HS pump allows for ease
of cleaning and can be cleaned in place without
disassembly. Before any cleaning is attempted, ensure
that the cleaning fl uids are compatible with all wetted
components.
For best cleaning results consider the following
information prior to cleaning the PX8 HS pump.
• For best Clean in Place (CIP) results, the pump
should be confi
gured to either the EHEDG or
3-A confi gurations.
• Actual CIP effectiveness with pump user’s product(s)
and processes should be validated on location by
the end user’s quality assurance personnel to meet
internal guidelines. Post cleaning swab test is one
method to accomplish this.
• The pump user should establish periodic inspections
with full tear down to verify that the CIP processes
continue to be effective as fi rst validated.
• Inlet pressure to the pump should not be greater
than 0.7 bar 10 (psig). Premature diaphragm failure
will occur if greater than 0.7 bar (10 psig) is applied.
If the pump is to be subjected to greater than 0.7 bar
(10 psig), an optional diaphragm balancing device
is suggested to eliminate the possibility of the
diaphragms being forced against the air chamber
and subsequently causing premature diaphragm
failure.
The following are some details to consider when
cleaning the PX8 HS pump.
• Through the EHEDG certifi cation process, the PX8
HS pump has been validated to clean equivalent to
the inlet tubing of the same diameter. The cleaning
chemical supplier should be consulted and advised
of this for their chemical solution and application.
The same guideline for duration of cleaning cycle
and temperature of cleaning fl uid apply.
• Suggested fl ow rate for the PX8 HS pump is 50
gpm/11 m
3 /hr (usually higher is better).
• Typical CIP temperature is 77 °C to 82 °C (170 °F to
180 °F).
• Typical chemicals include NaOH (sodium hydroxide)
caustic for wash and light acid and sanitizers for
rinse.
• Once an initial CIP regimen is established, it may
need to be modifi
ed to accommodate specifi c
process and product differences or requirements.
The most common adjustments include:
º Changing cleaning time (extended or reduced
pre-rinse, wash, rinses).
º Changing cleaning fl ow rate.
• The cleaning variables are related so that a pump
user may be able to reduce the cleaning time by
increasing the fl ow rate or chemical mix.
• Chlorinated sanitizers are known to cause premature
failure of stainless steel and should be avoided.
To Clean Pump
• Activate the CIP system while slowly cycling the
pump.
NOTE: A typical the CIP temperature limit is 90 °C
(195 °F). If the CIP temperature is greater than 90 °C
(195 °F), damage to the pump may occur.
S e c t i o n 8
C L E A N I N G - C I P