Seals made of elastomers are subject to ageing and must therefore
regularly be checked and, if necessary, exchanged.
It is also very important that the O-rings at the covers are placed correctly
and cable glands fastened firmly to prevent ingress of dirt or water.
We recommend additionally:
.
If rarely operated, perform a test run about every 6 months. This ensures
that the actuator is always ready to operate.
.
Approximately six months after commissioning and then every year check
bolts between actuator and valve/gearbox for tightness. If required, tighten
applying the torques given in table 2, page 8.
.
For multi-turn actuators with output drive type A: at intervals of approx.
6 months from commissioning press in Lithium soap EP multi-purpose
grease on mineral oil base at the grease nipple with grease gun (quantity
see table 3, page 9).
19.
Lubrication
.
The gear housing is filled with lubricant in the factory.
.
A grease change is recommended after the following operation time:
.
If rarely operated, after 10 – 12 years
.
If operated frequently, after 6 – 8 years
.
For modulating duty (type range SARN) after 4 – 6 years
Lubrication of the valve stem must be done separately.
20.
Disposal and recycling
AUMA actuators have an extremely long lifetime. However, they have to be
replaced at one point in time.
The actuators have a modular design and may therefore easily be
disassembled, separated, and sorted according to materials, i.e.:
.
electronic scrap
.
various metals
.
plastics
.
greases and oils
The following generally applies:
.
Collect greases and oils during disassembly. As a rule, these substances
are hazardous to water and must not be released into the environment.
.
See disassembled material to a sound disposal or to separate recycling
according to materials.
.
Observe the national regulations for waste disposal.
21.
Service and training
AUMA offers extensive services such as maintenance and inspection for
actuators as well as various training courses. Addresses of AUMA offices
and representatives can be found on page 32 and on the Internet
(www.auma.com).
25
Multi-turn actuators SAN 07.1 – SAN 25.1/SARN 07.1 – SARN 25.1
Operation instructions
for valve automation in nuclear power plants
en
n in o (Oest EP) to 11 (Renolit LST100) e se
o
letel is sse
le t to T o o
l le n e o sin n ll
is
ntle
ts s
s ollo s
t n e in s et e sin
s in
ine o ol le nin sol ent lo o t it o
esse i
.
Depending on the qualification, an exchange of grease and elastomer seals
is required after 12 years, at the latest.
Hereby, an average ambient
temperature of + 40 °C is used as calculation basis.
