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

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)

In hydraulic systems, the energy is carried by pressurized fluid from the power source to the circuit. Self-sealing mono-couplings are designed as a compact, single-piece connection that seals automatically when mated, creating a leak-tight path for that fluid. Because they form the direct conduit for the hydraulic fluid, they’re effectively the means by which the hydraulic energy is transmitted from one component to another. They can also be designed to carry or accommodate additional devices within the coupling assembly, such as sensors or auxiliary components, enabling integration without adding separate fittings.

This describes why they’re the best choice here: they are the components that enable the hydraulic energy to move through the system and can host other devices, whereas a hydraulic power unit is simply the energy source, and ORB/ORFS refer to sealing standards rather than energy-carrying connectors.