Some Important Information for Oval Gear Meters

A close up view of a standard rotor next to our special cut rotors.

Pressure Drop Limit Versus Flow Rate

The curves below represent the pressure drop for standard and special cuthigh viscosity oval rotors at various viscosities. Special cut rotors have alternate tooth relieve which effectively reduces the pressure drop by 50%.

Viscosities are in centipoise and the pressure drop is in Bar (1 Bar = 14.7psig). When sizing an oval meter for viscous liquids be sure your selection falls on or below the 1 bar maximum allowable pressure drop line on the graph.