Regada ST 0, Installation, Service And Maintenance Instructions

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4 ST 0, STR 0
•
type of fault - description of claimed fault (actuator employment, ambient parameters (temperature,
humidity...), duty cycle including frequency of switching, type of switching-off (position or thrust),
set switching-off thrust)
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it is recommended to place also Installation certificate.
It is recommended to have after-guarantee service performed by the service department of the
production plant, or by a contracted service centre.
1.5.1 Lifetime of actuators
The lifetime of an electric actuator (EA) is at least 6 years.
EA used for closing mode (closing valves) comply with the requirements for at least
15,000 working
cycles (cycle C – O – C: for linear EA).
EA used for regulating/modulating operation (control valves) comply with the below stated numbers of
operating hours at the total number of 1 million start-ups:
Switching frequency
max. 1,200 [h
-1
] 1,000 [h
-1
] 500 [h
-1
] 250 [h
-1
] 125 [h
-1
]
Minimal lifetime expectancy – number of operating hours
850 1,000 2,000 4,000 8,000
Time of
net operation is min. 200 hours, max. 2,000 hours.
Lifetime at operating hours depends on loading and switching frequency.
Note : High switching frequency does not ensure better regulation. Setting of regulation parameters
should be therefore made with the inevitably necessary switching frequency needed for the process in
question.
1.6 Operation conditions
1.6.1 Product location and operation position
Electric actuators may be installed and operated in enclosed locations of industrial facilities with
no temperature and moisture regulation, protected from direct climatic effects (such as direct sunlight).
Moreover, special “marine” versions may be used in waste water treatment applications, water
management, selected chemical applications, tropical environments and coastal areas.
EA have to be placed with the view of access toward handle of manual operating, top cover and
bushing. Installation and operation of EA is possible in
any position.
Warning:
When the EA is installed in open air, it must be sheltered lightly to protect is against direct
effects of atmosphere.
When installed in the areas with relative humidity more than 80%, in open air under a
shelter is needed to connect the space heater directly – without a thermal switch.
!