Samson EB 20b, Монтаж и эксплуатация

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6-1
EB 20b_EN
February 2022 edition
Subject to technical changes
Start-up
6 Start-up
The work described in this chapter may only be performed by
specialist personnel quali
fi ed to perform the corresponding task.
Danger of burning due to hot or cold components and pipe!
Ball valve components and pipes can become very hot or very
cold during operation and cause burns upon contact.
Ö
Let the components and pipes cool down or warm up.
Ö
Wear protective garments and protective gloves.
Danger of injury due to pressurised components and escaping
medium!
Ö
Do not loosen the screw of the optional test connection while
the ball valve is pressurised.
Danger of crushing due to moving actuator- and switching
shaft!
Ö
Do not reach into the bracket as long as the pneumatic pow-
er is connected to the actuator.
Ö
Before working on the ball valve, interrupt and lock pneumat-
ic energy and the control signal.
Ö
Vent the actuator.
Ö
Do not allow the jamming of objects in the bracket to hinder
the operation of the actuator- and switching shaft.
Ö
If the actuator- and switching shaft 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 re-
leasing the blockage, see the corresponding actuator docu-
mentation.
Ö
Prior to disassembly of the actuator, bring the ball valve into
the fail-safe position.
Danger of injury due to escaping exhaust air!
During operation, when regulating or when opening and closing
the ball valve, exhaust air can escape, for example from the ac-
tuator.
Ö
Wear eye protection when working near the valve
Ensure the following conditions prior to commissioning/recom-
missioning:
− The ball valve is installed properly in the pipe, see Chapter
“5 Assembly”.
− The leak and function tests have been completed successfully,
see Chapter “5.1 Installation conditions”.
− The current conditions in the concerned plant section corre-
spond to the design of the ball valve, see Intended use in
Chapter “1 Safety instructions and safety measures”.
WARNING
Commissioning/recommissioning
Ö
The PFA plastic sealing surfaces tend to fl ow. After commis-
sioning and reaching the operating temperature, tighten all
fl ange connections between the pipe and ball valve with the
corresponding tightening torques, see Table 15-2 and Table
15-3 in Chapter “15.1.1 Tightening torque”.
Ö
Retighten the screws of the body joint, see Table 15-1 in
Chapter “15.1.1 Tightening torques”.
Ö
Open the ball valves slowly in the pipe. Opening slowly pre-
vents a sudden increase in pressure and a resulting high
fl ow
speed that damages the ball valve.
Ö
Check the correct function of the ball valve.