Jet umbilical is a type of industrial umbilical used for jet pumps. Jet pumps are a type of centrifugal pumps that increase the pressure using a water jet and are suitable for transporting water from deep wells. The umbilical jet has two friction surfaces, one fixed and the other movable, and they are pressed together by a conical spring. The material of this navel is usually carbon, ceramic, silicon carbide and stainless steel.