SAI S.p.A. is a leader company in the Marine & Offshore Market, most of its production of hydraulic radial piston motors is devoted to marine applications, such as: net winches, anchor winches, hold cover winches, crane winches, upper deck winches, capstan drives, thruster steering drives, rudder steering drives, propeller drives, fishing pumps, fishing presses, offshore drilling equipment, flow dividers for synchronised cylinders.
The SAI motors are designed for granting high reliability under the most extreme working conditions: immersion capability, free fall, thermal shock resistance, cavitation resistance, contamination resistance, freewheeling, mooring capability, high speed, low speed operation, multi-speed operation.
The motors can be supplied to operate in freewheeling at speeds up to double the normal maximum operating speeds (highest speeds are possible without oil in the pistons) . The unique double piston support bearing enables higher power to be transmitted: the mechanical bearing minimises sliding velocities between piston and shaft, the hydrostatic bearing under the piston minimises metal contact and ensures optimal lubrification, the large diameter rollers in the bearing minimise contact pressures and have a very high local capacity. Furthermore the SAI motors maintain a high degree of speed stability even at very low speed. This is due to the high starting and low speed mechanical efficiencies: high volumetric efficiencies and high sliding stability of the moving components under load minimising stick-slip phenomena. All the high pressure areas in the motors have seals which maintain high volumetric efficiencies even with changes in tolerance between dynamic surfaces caused by thermal expansion or contraction, by flexure under stress or wearing the surface.
Choose the SAI advanced technology for all your Marine and Offshore applications. You will find out a SEA of advantages.