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DATE: February 2015
TEST BY: SKAN AG
Basel, Switzerland
INTRODUCTION
The spilt butterfly valve has a number of practical
advantages over existing transfer techniques
although for years lacked the microbiological
data to support its use. This study aims to gather
this data by means of qualifying the technology.
The ChargePoint butterfly valve consists of half
ports – an Active and a Passive. During the
operation, the Passive is docked to the Active
port in such a manner that the previously
exposed surfaces of both ports are locked
against each other. In this way, two different
controlled environments (class C and class A, for
example) should be kept separated, and an
aseptic transfer of material should be assured
through the valve.
This study investigates investigate its suitability to
achieve an Aseptic transfer of material, in this
case vial stoppers, through the valve thus
keeping controlled environments separate and
free form migration of microbiological
contamination.
TEST PROTOCOL
The practical qualification involved challenging
the split butterfly valve with class C bioburden
(20-25 spores per 2826 mm2, i.e. area of a
standard contact agar plate), using Geobacillus
stearothermophilus spores, and transfer vial
stoppers through the valve. The transferred
stoppers where then incubated in a growth
medium to detect any bacterial growth.
The microbial study was further divided into two
test parts (A and B).
In the test (B), Class-C bioburden exposed
surfaces of the valve (valve plates) was
disinfected with 6 % H2O2 prior to the assembly of
the valve. Whereas, in test (A), no prior
decontamination of Class-C exposed surfaces
was carried out. For each test, the experiment
was conducted in triplicates using 3 valves with
multiple make and breaks under identical
experimental conditions in a Pharmaceutical
sterility isolator (PSI).
Microbiological study of aseptic transfer of vial stoppers
with ChargePoint® AseptiSafe split butterfly valve.
Sterility Challenge
FULL STUDY REPORT
AVAILABLE UPON REQUEST
Figure 1: Loaded isolator chamber and airlock.
Figure 2: Example of bulk transfer of stoppers in IBC
form autoclave to Filling Line via split valve at each
stage (not part of this study).
RESULTS
 Bacterial growth was observed in positive
controls for both parts of the test (A and B)
 Negative controls remained clear.
 No turbidity (implying no bacterial growth)
was observed in any of the test containers.
This means that non of the contamination
inoculated onto the faces of the discs had
managed to migrate onto the stoppers during
the transfer.
DISCUSSION
With the results of this study it could be clearly
demonstrated that aseptic transfer of stoppers
through the valve assembly can be achieved in
routine pharmaceutical processes wherever
required.
ASEPTISAFE BENEFITS
 Ergonomically, docking and actuation is
unhindered by gloveport or gloves. (operated
from outside the enclosure)
 No intervention into the line and less
operations to perform the transfer.
 No intervention means less risk (particle
generation and damage)
 No intervention means no additional
gloveports to access the device internally.
 No intervention means no additional cost
from the RABs / Isolator supplier (glass /port/
glove)
 No opening parts inside the line means no
disturbance to the laminar flow inside the
aseptic core and no particle generation over
the stopper bowl.
 Passive can be reused after transfer.
Autoclaved or SIP if mounted to a Stopper
transfer vessel.
 Contamination free transfer.
FURTHER INFORMATION
Contact us for further information or a copy of
the full study report.
marketing@thechargepoint.com
+44 (0)151 728 4500
Figure 3: inoculation of
valve plates with class
C bioburden.
Figure 4: Transferring
stoppers through the
valve.
Microbiological study of aseptic transfer of vial stoppers with ChargePoint® AseptiSafe split butterfly valve.
Figure 5: Example of small scale stopper transfer
from ChargeBag PE via AseptiSafe split valve
mounted to filling line isolator (not part of this
study).

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Microbiological study of aseptic transfer of vial stoppers with ChargePoint® AseptiSafe split butterfly valve.

  • 1. DATE: February 2015 TEST BY: SKAN AG Basel, Switzerland INTRODUCTION The spilt butterfly valve has a number of practical advantages over existing transfer techniques although for years lacked the microbiological data to support its use. This study aims to gather this data by means of qualifying the technology. The ChargePoint butterfly valve consists of half ports – an Active and a Passive. During the operation, the Passive is docked to the Active port in such a manner that the previously exposed surfaces of both ports are locked against each other. In this way, two different controlled environments (class C and class A, for example) should be kept separated, and an aseptic transfer of material should be assured through the valve. This study investigates investigate its suitability to achieve an Aseptic transfer of material, in this case vial stoppers, through the valve thus keeping controlled environments separate and free form migration of microbiological contamination. TEST PROTOCOL The practical qualification involved challenging the split butterfly valve with class C bioburden (20-25 spores per 2826 mm2, i.e. area of a standard contact agar plate), using Geobacillus stearothermophilus spores, and transfer vial stoppers through the valve. The transferred stoppers where then incubated in a growth medium to detect any bacterial growth. The microbial study was further divided into two test parts (A and B). In the test (B), Class-C bioburden exposed surfaces of the valve (valve plates) was disinfected with 6 % H2O2 prior to the assembly of the valve. Whereas, in test (A), no prior decontamination of Class-C exposed surfaces was carried out. For each test, the experiment was conducted in triplicates using 3 valves with multiple make and breaks under identical experimental conditions in a Pharmaceutical sterility isolator (PSI). Microbiological study of aseptic transfer of vial stoppers with ChargePoint® AseptiSafe split butterfly valve. Sterility Challenge FULL STUDY REPORT AVAILABLE UPON REQUEST Figure 1: Loaded isolator chamber and airlock. Figure 2: Example of bulk transfer of stoppers in IBC form autoclave to Filling Line via split valve at each stage (not part of this study).
  • 2. RESULTS  Bacterial growth was observed in positive controls for both parts of the test (A and B)  Negative controls remained clear.  No turbidity (implying no bacterial growth) was observed in any of the test containers. This means that non of the contamination inoculated onto the faces of the discs had managed to migrate onto the stoppers during the transfer. DISCUSSION With the results of this study it could be clearly demonstrated that aseptic transfer of stoppers through the valve assembly can be achieved in routine pharmaceutical processes wherever required. ASEPTISAFE BENEFITS  Ergonomically, docking and actuation is unhindered by gloveport or gloves. (operated from outside the enclosure)  No intervention into the line and less operations to perform the transfer.  No intervention means less risk (particle generation and damage)  No intervention means no additional gloveports to access the device internally.  No intervention means no additional cost from the RABs / Isolator supplier (glass /port/ glove)  No opening parts inside the line means no disturbance to the laminar flow inside the aseptic core and no particle generation over the stopper bowl.  Passive can be reused after transfer. Autoclaved or SIP if mounted to a Stopper transfer vessel.  Contamination free transfer. FURTHER INFORMATION Contact us for further information or a copy of the full study report. marketing@thechargepoint.com +44 (0)151 728 4500 Figure 3: inoculation of valve plates with class C bioburden. Figure 4: Transferring stoppers through the valve. Microbiological study of aseptic transfer of vial stoppers with ChargePoint® AseptiSafe split butterfly valve. Figure 5: Example of small scale stopper transfer from ChargeBag PE via AseptiSafe split valve mounted to filling line isolator (not part of this study).