Wilden SANFLO PX15, Operation & Maintenance Manual

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WIL-12320-E-05
33 WILDEN PUMP & ENGINEERING, LLC
The design of the PX15 HS pump allows for ease of
cleaning. The PX15 HS pump can be cleaned in place
without disassembly. Before any cleaning is attempted,
ensure that the cleaning fluids are compatible with all
wetted components.
For best cleaning results consider the following
information prior to cleaning the PX15 HS pump.
•
For best Clean-In-Place (CIP) results, the pump
should be configured to either the EHEDG or
3-A configurations.
• 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 first 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 PX15 HS pump.
• Through the EHEDG certification process, the PX15
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 fluid apply.
• Suggested flow rate for the PX15 HS pump is 100
gpm/22.7 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 modified to accommodate specific
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 flow rate
• The cleaning variables are related so that a pump
user may be able to reduce the cleaning time by
increasing the flow rate or chemical mix.
• Chlorinated sanitizers are known to cause premature
failure of stainless steel and should be avoided.
• Keep in mind, many CIP systems leave the pump
filled with sanitizer and water and do not require
draining.
• Wilden offers models with a swivel stand for manual
draining when required. The swivel stand allows
the pump to be rotated 180° allowing the contents
within the pump to be easily drained into a suitable
container.
• To drain a pump that is fitted with a non-swivel stand,
the manifolds and liquid chambers must be removed
if there is no automated CIP airblow system in place.
With the use of an automated CIP airblow system, a
pump fitted with a non-swivel stand can be cleaned
in the same manner as a pump fitted with a swivel
stand.
• An effective CIP system must have drain valves in
the process line before and after the pump at the
lowest points. The CIP system must be programmed
to alternate between blowing air and opening the
drain valves. This process must be repeated several
times.
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