Answer:
The FAAC 620 uses an electro-hydraulic drive featuring a hydraulic gerotor pump, plunger pistons, and independent by-pass valves for separate opening and closing force adjustment. The steel cabinet is protected against environmental corrosion via cataphoresis surface treatment and finished with RAL 2004 polyester powder paint.
Unlike mechanical gear-driven barriers that experience gear-tooth fatigue under heavy cycles, the FAAC 620 relies on self-lubricating electro-hydraulic architecture. Its kinematic chain combines a low-noise hydraulic gerotor pump, die-cast distribution flange, plunger pistons, equaliser, transmission shaft, and an anodised aluminium fluid reservoir charged with FAAC HP mineral oil.
Differentiating build and functional attributes include:
- Hydraulic Force Regulation: Dual independent hydraulic by-pass valves allow precise, isolated mechanical force adjustment during both opening and closing cycles.
- Corrosion Protection: The load-bearing steel housing undergoes an immersion cataphoresis treatment followed by thermosetting RAL 2004 polyester powder paint. Internal kinematic elements feature niploy surface treatments.
- Hydraulic Locking: The hydraulic circuit provides positive mechanical locking in both the fully open and fully closed positions, resisting manual tampering without supplemental electromagnetic locks.
- Deceleration Control: Integrated electronic deceleration at travel limits with mechanically adjustable cams to tune transition cushioning based on arm profile weight.
- Manual Release: An external manual release mechanism accessible via a triangular key allows manual boom operation during line power outages.
