Samson EB 20b, Монтаж и эксплуатация

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9-1
EB 20b_EN
February 2022 edition
Subject to technical changes
Servicing
9 Servicing
The work described in this chapter may only be performed by
specialist personnel quali
fi ed to perform the corresponding task.
The following documents are required in addition for the mainte-
nance of the ball valve:
− Installation and operating manual for the installed actuator,
e.g

EB 31a for BR 31a rotary actuators or the correspond-
ing actuator documentation of other manufacturers.
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.
Danger of injury due to preloaded springs!
Actuators with preloaded actuator springs are pressurised.
Ö
Release the compression from the preloaded springs before
working on the actuator, see the corresponding actuator doc-
umentation.
Danger of injury due to residual medium in the ball valve!
When working on the ball valve, residual medium can escape
and, depending on the medium properties, cause injuries (e.g.
scalding, chemical burns).
Ö
Wear protective garments, protective gloves and eye protec-
tion.
Ö
Do not loosen the screw of the optional test connection while
the ball valve is pressurised.
Ö
Bring the ball valve into the open position so the pressure is
released from the ball.
WARNING
Damage to the ball valve due to excessively high or low tight-
ening torques!
The ball valve components must be tightened with speci fi c tor-
ques. Excessively tightened components are subject to increased
wear and can damage the plastic lining. Insuf
fi ciently tightened
components can cause leakage.
Ö
Observe the tightening torques, see Table 15-1 in Chapter
“15.1.1 Tightening torques”.
Damage to the ball valve due to unsuitable tools!
Ö
Only use tools approved by PFEIFFER, see Chapter “15.1.3
Tools”.
Damage to the ball valve due to unsuitable lubricants!
Ö
Only use lubricants approved by PFEIFFER, see Chapter
“15.1.2 Lubricants”.
The ball valve was checked by PFEIFFER prior to delivery.
− Certain test results certi fi ed by PFEIFFER are no longer valid
when disassembling the ball valve. This includes the test for
seat leakage and the leak test (outer tightness).
− If maintenance and repair work is performed without approval
from the After Sales Service of PFEIFFER, the product guarantee
will be voided.
− Only use original parts from PFEIFFER as spare parts that cor-
respond to the original speci
fi cation.
− Wear parts are not covered by the warranty.
9.1 Periodic tests
Ö
Depending on the conditions of use, the ball valve must be
checked at de
fi ned intervals in order to take remedial meas-
ures prior to possible malfunctions. The plant operator is re-
sponsible for preparing a suitable test plan.
Ö
PFEIFFER recommends the following inspections that can be
carried out during operation:
Test
Measures in the case of a negative
test result
If present, check the optional
test connection for tightness.
WARNING! Danger of injury
due to pressurised components
and escaping medium! Do not
loosen the screw of the test con-
nection while the ball valve is
pressurised.
Decommission the ball valve, see
chapter “10 Decommissioning”.
Contact the After Sales Service at
PFEIFFER for repairs, See chapter “12
Repairs“.
Check the switching shaft seal-
ing for tightness from the out-
side. The switching shaft sealing with a PT-
FE V-ring packing is preloaded with
a set of spring washers and is there-
fore maintenance free.
NOTE
Info