Which component helps maintain pressure in a fluid circuit equal to ambient sea water pressure plus the spring pressure?

• A. Pressure regulators
• B. Diaphragms
• C. Accumulators
• D. Compensators

Answer: (D)

The main idea is balancing internal pressure with external pressure in a submerged system. A compensator is designed to keep the pressure inside a chamber equal to the ambient sea water pressure plus a spring bias. As depth changes, external pressure increases or decreases, and the compensator adjusts by letting hydraulic fluid in or out so the internal pressure tracks that external pressure plus the spring’s force. This keeps seals from seeing large differential pressures and maintains stable operation of the hydraulic circuit underwater.

Pressure regulators aim for a set output pressure but don’t automatically follow ambient external pressure; an accumulator stores energy and smooths pressure without matching ambient pressure; a diaphragm is a component used to sense or transmit pressure but doesn’t itself enforce the ambient-plus-spring balance.