OLGAS-H
– High pressure spring return hydraulic actuator
Use and maintenance manual
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Pag. 7
Contents may change without notice
settings have already been made at the factory.
If the actuator is delivered separately from the valve, it is
necessary to check, and, if required, to adjust, the settings of the
mechanical stops (Sect. 3.4) and of micro-switches (if any) (Sect.
3.5).
2.2 STORAGE
(for handling and lifting procedure, please refer to following
paragraphs : 2.3.2 and 2.3.3)
If the actuator needs storage before installation, follow these steps:
❑
Place it on a wood surface in order not to deteriorate the area of
valve coupling.
❑
Make sure that plastic plugs are present on the pneumatic and
electrical connections (if present).
❑
Check that the cover of the control group and of the limit switch box
(if any) are properly closed.
If the storage is long-term or outdoor:
❑
Keep the actuator protected from direct weather conditions.
❑
Replace plastic plugs of pneumatic and electrical connections (if
any) with metal plugs that guarantee perfect tightness.
❑
Coat with oil, grease or protection disc, the valve coupling area.
❑
Periodically operate the actuator (Sect. 3.3).
2.3 ACTUATOR ASSEMBLY ON THE VALVE
2.3.1 Types of assembly
For coupling to the valve, the housing is provided with a flange with
threaded holes according to Biffi standard tables (SCN6200
SCN6201). The number, dimensions and diameter of the holes are
made in accordance with ISO 5211, but for actuator models 0.3 to 6
the holes are drilled on the centreline in order to allow an easier
assembly of an intermediate flange, when required. This intermediate
flange ( or spool-piece ) can be supplied when the valve flange can
not directly match the actuator flange in its “standard” configuration.
For the biggest actuator models, the actuator flange can be
machined in accordance with the valve flange dimensions.
The yoke has bored with keyways for coupling to the valve stem, the
dimensions of which are according to Biffi standard tables SCN6200
and SCN6201.
