Rotary flow dividers provide many useful functions from a single pump source:
Synchronised operation of multiple cylinders or fluid motors.
Proportional division of pump output among several circuits.
Intensified flow pressure when pressure higher than pump capacity is needed.
In a rotary flow divider, horsepower-in is equal to horsepower-out with very small efficiency losses. Consequently it does not generate heat. The rotary gear flow divider consists of 2 or more gear sections connected by a common shaft. Using a common inlet port, each section has its own outlet port. Because the gear sections are connected by a common shaft, the rotation speed is the same for each gear and the flow division is exactly proportional to the displacement of each of the sections.
Pressure intensification is a phenomenon that is inherent in all flow divider circuits. Whenever the pressure requirement in a section is greater than another section, the pressure differential between the sections will appear in the higher pressure section as an additive to the inlet pressure. For this reason a system relief valve should be used on the inlet side.
The gears are unrestricted in the direction they turn, therefore flow dividers can be used to combine the separate flows into a single flow which is equal to the sum of the various inputs.