8
February 2022
Installation, Operation and Maintenance Manual
MAN 607 Rev. 6
Section 2: Installation
Installation
Position 1
Standard Application
Position 2
Standard Application
Position 3
Change the position of
suction pipe from A to B
and the breather cap to
top side
2.4
Actuator Assembly on the Valve
2.4.1
Types of Assembly
For coupling to the valve, the housing is provided with a flange with threaded holes
according to Biffi standard tables (SCN6200; SCN6200-1; SCN6201; SCN6201-1). 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 centerline 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‘t 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*. If required, for the standard models size 0.3
to 6, Biffi can supply an insert bush with unmachined bore in accordance with Biffi standard
table SCN6202. On request, the insert bush bore can be machined by Biffi to couple the
valve stem. The particular execution of the flange and bushing allow the actuator to be
rotated by 90° in 4 different positions according to Figure 10.
2.3
Storage
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 hydraulic 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 hydraulic 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 (Section 3).
Figure 9
Fixing positions
