Samson EB 01a, Монтаж и эксплуатация

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5-4
EB 01a_EN
March 2023 edition
Subject to technical changes
Installation
5.4.2 Installing the valve
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Close the valve in the pipe for the duration of the installation.
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Remove the protective caps on the valve openings prior to in-
stallation.
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Lift the valve with suitable lifting equipment at the installation
site, see chapter “4.3 Transporting and lifting the valve”.
When doing so observe the
fl ow direction of the valve. An
arrow on the valve indicates the fl ow direction.
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Make sure that the correct fl ange seals are used.
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Screw the pipe together with the valve without tension.
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After installing the valve, open it slowly in the pipe.
Damage to the valve due to a sudden pressure increase and
resulting high
fl ow speed!
Open the valve slowly in the pipe during commissioning.
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Check the correct function of the valve.
5.5 Checking the assembled valve
5.5.1 Functional check
Danger of injury due to pressurised components and escaping
medium!
− Do not loosen the test connection while the valve is pressurised.
Danger of crushing due to moving actuator stem and stem!
− Do not reach into the yoke as long as the pneumatic power is
connected to the actuator.
− Before working on the valve, interrupt and lock pneumatic en-
ergy and the control signal.
− Do not allow the jamming of objects in the yoke to hinder the
operation of the stem and actuator stem.
− If the actuator stem and stem are blocked (e.g. due to “seizure”
if not actuated for a long period of time”), release the residual
energy of the actuator (spring tension) before releasing the
blockage, see the corresponding actuator documentation.
Danger of injury due to escaping exhaust air!
During operation, when regulating or when opening and closing
the valve, exhaust air can escape, for example from the actuator.
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Wear eye protection when working near the valve.
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At the end of installation, perform a functional test with the
control signals:
The valve must close and open correctly according to the con-
trol commands. Detected malfunctions must be
fi xed before
commissioning, see Chapter “8 Malfunction”.
NOTE
WARNING
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 chap-
ter “8 Malfunction”
5.5.2 Pressure test of the pipe section
The pressure test was already performed on the valves by
PFEIFFER. Observe the following for the pressure test of a pipe
section with installed 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:
– Retract the plug in order to open the valve.
– Valve open: The test pressure may not exceed the value
1.5 x PN (according to the type plate) or the marked test
pressure PT.
If a valve leaks, observe chapter “8 Malfunction”.
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 Travel movement
The travel movement of the actuator stem must be linear without
any jerky movements.
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Open and close the valve. When doing so, observe the
movement of the actuator stem.
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Set the maximum and minimum control signal in succession
to check the end positions of the valve.
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Check the display on the travel indicator.
5.5.4 Fail-safe position
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Close and vent the signal pressure line.
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Check whether the valve moves to the fail-safe position, see
“Fail-safe positions in Chapter “3 Design and principle of op-
eration”.
WARNING
Info