The Rotary Joint Technology
One of the key aspects in CSP parabolic trough technology is the connection of a SCA (Solar Collector Assembly) both with a manifold or in the crossover (in the middle of the loop). The flexible hose has to withstand torsional stresses specially when the SCA is connected to a stationary pipe: in this case the flexible hose lifespan drops down and catastrophic failure can happen.
Rotary joint avoids completely this issue increasing the reliability of the plant.
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Download the brochure of Rotary Jont Rev.1