Self-sealing mono-couplings provide the energy required for the hydraulic installation and may also act as a carrier for other devices.

• A. Hydraulic power unit
• B. Self-sealing mono-couplings
• C. ORB
• D. ORFS

Answer: (B)

Self-sealing mono-couplings are designed to form a secure, leak-tight path for the hydraulic fluid while still being compact enough to host or support additional devices on the line. In other words, they are more than just a connection; they carry the hydraulic energy through the system and can serve as a platform for other components such as sensors, valves, or small integrated devices attached to the coupling assembly. The actual source of energy in a hydraulic system is the hydraulic power unit, not the coupling itself, so that option doesn’t describe the role of the connector. ORB and ORFS refer to specific sealing geometries, but they aren’t energy paths or carriers for extra devices, so they don’t fit as well as self-sealing mono-couplings.