Samson EB 20a, Монтаж и эксплуатация

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8-2
EB 20a_EN
May 2022 edition
Subject to technical changes
Malfunction
Type of fault Possible cause Measures
Malfunction The actuator unit or control
does not react Check the actuator unit and control command.
The actuator and control are
OK Remove and inspect the valve, see chapter “1 Safety instructions and
safety measures”.
Remove the actuator unit and measure and check the ball valve
torque.
The ball valve is damaged Repairs are necessary.
Remove the ball valve, see chapter “1 Safety instructions and safety
measures”.
Request spare parts from PFEIFFER, see Chapter “15.2 Spare parts”.
For the required repair instructions, see Chapter “12 Repairs”.
Problems in the actuator unit The pneumatic actuator must
be removed Disconnect the connection to the control pressure.
Remove the actuator from the ball valve, observe the “Safety
instructions and safety measures”, see the included actuator unit
manuals.
− In the case of faults that are not listed in the table, contact the
After Sales Service at PFEIFFER.
− Spare parts must be ordered indicating all the data according
to the valve marking. Only original parts from PFEIFFER Che-
mie-Armaturenbau GmbH may be installed.
− If it is determined after removal that the PTFE lining is not suf fi -
ciently resistant for the medium, parts must be selected made of
a suitable material.
8.2 Carrying out emergency measures
In the case of a power supply failure, the ball valve automatically
switches to the preset fail-safe position, see “Fail-safe positions”
in Chapter “3 Design and principle of operation”.
The system operator is responsible for emergency measures.
In case of a ball valve fault:
− Close the shut-off valves upstream and downstream of the
ball valve so that no medium
fl ows through the ball valve.
− Troubleshoot the error, see chapter “8.1 Detecting and rectify-
ing errors”.
− Rectify the fault that can be fi xed as indicated in the instruc-
tions provided in this installation and operating manual. For
faults that cannot be
fi xed, contact the After Sales Service at
PFEIFFER.
Recommissioning after faults
See Chapter “6 Commissioning”.
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