15
CONTROL block
CONTROL block extends the possibility of the use of
MOA actuators with regulating valves in automatic control
system circuits and complements the equipment of these actuators.
For
MOA actuators, the CONTROL block is supplied as an independent assembly that is electrically interconnected
with the relevant actuator, and controls its operation. The CONTROL block includes ZP2RE6 regulator with a feeding
transformer and a switching block. The switching block may include SSR, or SSR with brake, or contactors. Optionally,
the CONTROL block may also include a local control block.
CONTROL block technical data
Weight
8.1 kg
Surrounding Environment
– normal working temperature
from -20 °C to +50 °C
– relative humidity
up to 90%
– radiation dose per life
200 Gy/life
– maximum dose rate
2,50E-03 Gy/hr.
Protection
IP 67
Maximum cable length between the CONTROL block and actuator
100 m
The specifications of the connecting cable between the CONTROL block and the actuator resistive transmitter – 3 cores
with cross-section of 1 mm, shielded and suitable for the surrounding environment.
Wiring and adjustment manual of the CONTROL block is supplied separately.
6. PACKAGING AND STORAGE
The actuators are packaged together with the valve on which they are mounted. The packaging method
applicable to this assembly must be included in the technical conditions for the valves with the actuator mounted.
During the transportation of the actuators from the manufacturer’s factory to the domestic valve manufacturer
where the product is to be completed with the valve, the product must be covered. In such a case, the actuators
are transported unpackaged.
After receipt of actuators from manufacturer, actuators must be checked for possible damage suffered during
transport. Compare if data on serial plates of actuators correspond with the accompanying documentation and the
purchase order. Possible discrepancies, defects or damage must be immediately reported to supplier.
If the packed actuator is not installed immediately after receipt, it must be stored in dust-free room with ambient
temperature between -50 °C and +50 °C, with relative humidity up to 75 %, free from corrosive gases and fumes,
protected from harmful climate impacts. Any manipulation with the actuators at temperatures lower than -25 °C is
forbidden.
It is impermissible to store actuators outdoor or in areas unprotected from rainfall, snowfall and/or ice. Surplus
preservative grease must be only removed before commissioning the actuator. When storing unpacked actuators
for a period exceeding 3 months, we recommend you to insert a small bag with silica gel or another suitable
desiccant material into the terminal box.
The actuators must be stored in the environment characterized by the 1K3, 1Z1, 1B2, 1C1L, 1S1, 1M1 classes
of the climatic and other conditions pursuant to ČSN EN 60721-3-1.
At least once in a half-year during the storage period it has to be checked that the storage conditions are really
observed, that no water infiltrates into the storeroom, for example. When the actuators are stored in their original
intact packages the conservation has to be repeated in three-year intervals. Re-preservation is performed by
applying a continuous layer of a suitable preservative oil on the uncoated parts of the actuator. Within this
re-conservation, the bag with the drying agent must be dried up and put back into the package which has to be
tightly closed or sealed with a tape. Where the actuator is stored for over one year, the oil has to be replaced in
the power box before the product is put into service. Where the actuator is stored for over 4 years, all the rubber
gaskets have to be replaced before the product is put into service.
After the end of storage and before mounting the electric actuator to a valve, remove the preserving agent from
a connecting flange using a cloth soaked in suitable solvent.
