PSG Dover WILDEN SANIFLO PS15 Hygienic Series, Engineering, Operation & Maintenance

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WIL-12630-E-04
Wilden ®
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Clean - In - Place - CIP
The design of the Saniflo HS pump allows for ease of cleaning.
The Saniflo 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 Saniflo 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.
•
Liquid inlet pressure to the pump should not be greater than 0.7
bar (10 psig). Premature diaphragm failure may 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 Saniflo HS pump.
•
Through the EHEDG certification process, the Saniflo 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 PS15 HS pump is 100 gpm/22.7
m3/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.
Section 8