9 Cleaning and sterilisation
The ASEPCO patented valve architecture (US Patent #5152500) includes a unique radial
diaphragm that forms three seals with the valve: the seal at the inlet, a seal with the
compound shoulder and an O-ring seal at the bottom of the valve chamber.
Important: Pneumatic actuators should have their seals replaced every
3 years for standard actuators and every year for ATEX actuators.
Manual actuators should have their seals replaced every 10 years. See
"Parts list" on pageî37, for replacement kit part numbers.
A behind-the-seat flow path allows complete flushing of the valve chamber. The result is a
superb aseptic design that promotes self-draining and easy cleaning.
Inlet
Outlet
Flush seat
to valve cavity
O-ring seal
Shoulder seal
Ensure that your CIP/SIP cleaning process does not compromise the diaphragm due to
chemical incompatibility or excessive exposure to high temperatures.
All of our valve bodies and actuators can be sterilised in an autoclave. The diaphragm
materials that ASEPCO uses are rated for temperatures of 135C (275F) or higher, depending
on the material. So, as long as the autoclaving process is below that temperature it is not
necessary to wait for it to cool before reassembly.
The valve and actuator surfaces will be hot following sterilisation in an
autoclave and may cause injury when handled. Suitable personal
protective equipment must be worn and care must be taken when
handling the valve and actuator.
All the actuators have built-in, non-adjustable travel stops that prevent over-tightening of
the diaphragm in any conditions, hot or cold.
m-radialdiaphragmvalve-en-02 33
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