Samson EB 01b, Монтаж и эксплуатация, Страница: 37 / 64

9-1
EB 01b_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 valve:
− Installation and operating manual for the installed actuator,
e.g

EB 8310-X for actuators type 3271 and type 3277 or
the corresponding actuator documentation of other
manufacturers.
Danger of burning due to hot or cold components and pipe!
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 test connection while the valve is pressur-
ised.
Danger of crushing due to moving actuator stem and stem!
Ö
Do not reach into the yoke as long as the pneumatic power is
connected to the actuator.
Ö
Before working on the valve, interrupt and lock pneumatic
energy and the control signal.
Ö
Do not allow the jamming of objects in the yoke to hinder the
operation of the stem and actuator stem.
Ö
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.
Ö
Wear eye protection when working near the valve.
Danger of injury due to prestressed springs!
Actuators with preloaded actuator springs are pressurised. These
actuators can be identi
fi ed by the elongated screws on the bot-
tom of the actuator.
Ö
Release the compression from the preloaded springs before
working on the actuator, see the corresponding actuator
documentation.
Danger of injury due to residual medium in the valve!
When working on the 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
protection.
WARNING
Damage to the valve due to excessively high or low tightening
torques!
The valve components must be tightened with speci fi c torques.
Excessively tightened components are subject to increased wear.
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 valve due to unsuitable tools!
Ö
Only use tools approved by PFEIFFER, see Chapter “15.1.3
Tools”.
Damage to the valve due to unsuitable lubricants!
Ö
Only use lubricants approved by PFEIFFER, see Chapter
“15.1.2 Lubricants”.
The valve was checked by PFEIFFER prior to delivery.
− Certain test results certi fi ed by PFEIFFER are no longer valid
when disassembling the 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.
9.1 Periodic tests
Ö
Depending on the conditions of use, the 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 test con-
nection and bellows sealing
for tightness.
WARNING! Danger of injury
due to pressurised components
and escaping medium! Do not
loosen the test connection
while the valve is pressurised.
Decommission the valve, see chapter
“10 Decommissioning”.
Contact the After Sales Service at
PFEIFFER to repair the bellows, See
chapter “12 Repairs“.
NOTE
Info