HLDA
– Double acting - Doubled thrust hydraulic linear actuator
Use and maintenance manual
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Pag. 7
Contents may change without notice
The section ratio between the first part of the stroke and the
remaining stroke is about two areas.
This type of solution, reduce the oil displacement of the actuator,
allowing lower volume of the accumulators for the emergency
strokes.
The linear stroke of the valve is adjustable by means of the external
mechanical stop for upward position and by the adjustment of the
coupling of valve stem to actuator joint for the downward position.
The actuator pedestal has a flange with threaded holes to fix the
actuator to the valve.
BIFFI can supply different types of control system following
Customer’s requirements.
The expected lifetime of actuator is approximately 25 years .
Figure 2
– Identification of actuator parts
Hydraulic cylinder
Valve coupling
Emergency
hydraulic
accumulators
Lifting eyelets
