Samson EB 14b, Монтаж и эксплуатация

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5-4
EB 14b_EN
January 2022 edition
Subject to technical changes
Installation
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At the end of installation, perform a functional test with the
control signals:
The butter fl y valve must close and open correctly according to
the control commands. Detected malfunctions must be fi xed
before commissioning, see Chapter “8 Faults”.
Danger due to improperly executed control commands!
Incorrectly executed control commands can cause serious injuries
or even death and cause damage to the pipe system.
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Check the actuator unit and control command., see chapter
“8 Faults”.
5.5.2 Pressure test of the pipe section
The pressure test was already performed on the butter fl y valves
by PFEIFFER. Observe the following for the pressure test of a pipe
section with installed butter
fl y valves:
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First carefully rinse newly installed pipe systems in order to
wash out all foreign matter.
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Ensure the following conditions for the pressure test:
– Valve open: The test pressure may not exceed the value
1.5 x PN (according to the type plate).
– Valve closed: The test pressure may not exceed the value
1.1 x PN (according to the type plate).
If a butter fl y valve leaks, observe chapter “8 Faults”.
The plant operator is responsible for performing the pressure test.
After Sales Service at PFEIFFER can provide you with support for
the planning and implementation of a pressure test speci
fi c to
your plant.
5.5.3 Rotary movement
The rotary movement of the actuator- and switching shaft must be
linear without any jerky movements.
Ö
Open and close the butter fl y valve. When doing so, observe
the movement of the actuator shaft.
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Set the maximum and minimum control signal in succession
to check the end positions of the butter
fl y valve.
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Check the display on the position indicator.
WARNING
Info
5.5.4 Fail-safe position
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Close the signal pressure line.
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Check whether the butter fl y valve moves to the fail-safe posi-
tion, see Chapter “Fail-safe positions in Chapter “3 Design
and principle of operation”.