The InvisiHead seawater intake velocity cap - a patented omni directional intake head system - adds to the performance of the offshore system. It is fitted to the upstream end of seawater intake system pipelines located some distance into the sea from the shoreline. Entrance velocity is lower than  0.091 m/s (< 0.3 fps).  The approach velocity is extremely slow <0.002 m/s (< 0.007 fps) at 5 meters away - the InvisiHead intake head becomes hydraulically invisible to suspended matter. In other words, the intake head does not act as a sink point and therefore does not suck in debris. Floor sand, silt, and tiny larvae (< 20 umg) remain undisturbed by the the lower flow streamlines taking off from the sea floor. The super slow entrance velocities also lead to lower head losses and lower level draw down at the pump intake basin. the head loss at the InvisiHead is at a negligibly low 0.0017 mm. 

The InvisiHead entrance section is hydraulically fine-tuned in lab to optimize system hydraulics. The entrance dimensions are not arbitrarily selected but hydraulically calculated in a multi dimensional approach. Each dimension is a function of the steady flow velocity. Eddies through this approach are totally eliminated.

The InvisiHead System is supplied with a built-in anti biofouling dispensing system to be connected with an onshore disinfectant source through HDPE or PVC hose. The system is designed so that 100% of the disinfectant dispensed remains in the water flowing into the intake pipeline and none flows outside of the system. 

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