Translation of the original operating instructions
Type 327
© 1994 - 2022 SED Flow Control
63
BA220002 Version:
a
Vo
rl
ag
e
: d
o
k360 (
c)
6.2.2. Change of two-piece diaphragms
→
Disassemble valve, see chapter 5.3.2.
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Bring valve in close position.
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Screw out diaphragm anticlockwise
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Insert compressor and position it correctly.
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At first place the support diaphragm in correct position on the actuator and its compressor.
Invert the PTFE diaphragm and screw in clockwise up to the stop.
Then position diaphragm by turning it back anticlockwise in a way that the wholes of the
diaphragm and valve body fit together. Attention! Do not turn back more than 180°! Also take
care for correct position of the diaphragm flap.
If the diaphragm isn’t assembled correctly, point loading can occur!
This can lead to leakage and damage of the diaphragm.
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Evert PTFE diaphragm in initially position.
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Bring valve in open position.
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Place actuator on the valve body. Take care for correct orientation of diaphragm and weir.
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Position screws and fasten hand-tight.
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Close pneumatic actuator.
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Fasten screws or nuts crosswise. Tightening torques see chapter 5.3.1.
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Check the valve at the pass and to the outside for tightness and function.
Take care for equal compression of the diaphragm
–
about 10% depending on material and
version. Especially PTFE diaphragms show a setting behavior.
Check the valve after the first thermal load latest and re-fasten screws if necessary.
6.3. Cleaning
For external cleaning, commercially available cleaning agents can be used. Check the chemical resistance of all
materials used in the valve, which could come in contact with the cleaning agent, before applying
For sterilization processes, check if the valve is suitable for the applied process.
7.
Accessories
Fitting and functional accessories are available via sed.samsongroup.com or contact us.
