FOILEX TDS PUMP FEATURES
Displacement and Pump Screw diameter are the two important design parameters that gives the Positive Displacement Index, PDI of a Screw Pump. The Positive Displacement Index is independent of pump size and pump speed.
Positive Displacement Index:
PDI = 7 x D / d3
D = Displacement
The large displacement provides high output capacity in low to medium viscosity oils or operate efficient at low rpm in high viscous oils with a minimum of emulsification. The combination with large exposed pump screw area and large discharge connection gives unique capabilities for high viscous oil pumping.