HLA
– Double acting- hydraulic linear actuator
Use and maintenance manual
© Copyright by BIFFI Italia. All right reserved.
Pag. 16
Contents may change without notice
Figure 4
– Double acting function with
jackscrew manual override
MHP
3.2 RESIDUAL RISKS
The actuator has parts under pressure.
Use the due caution.
Use individual protections provided for by the laws and
provisions in force.
3.3 OPERATIONS
( refer to specific document: operating diagram furnished )
3.3.1 Emergency manual operation (MHP)
Refer
to
applicable
control
schematic
in
supplied
documentation.
The HLA actuators can have an emergency manual override in
addition to the local and/or remote control system which controls the
oil supplied by a power pack for the
“normal” actuator operation.
The emergency manual override mounted on the actuator, consists
of an hydraulic manual override and a hydraulic manual selector to
choose the
actuator “Normal operation”, with oil supply from a power
pack, or the
“Emergency manual operation”. For nominal pressure
until 105 bar the manual override is similar to chapter 7.2 table 3. For
nominal pressure upper to 105 bar the manual override will be OMFB
for carbon steel material, or dedicated model engineered by BIFFI for
stainless steel material
