... 3.CE,ISO9001 Stars direct drive system for pcp oil pump (Progressing Cavity Pump)---NAS-B SeriesThis system contains Control cabinet, Servo driver ... areas. Large torque of overload can resist pump blocked by sand, and apply to general oil well, viscous oil well, and sand ... transmission capability(Reserved). Easy operation and installation, low cost of one-off investment.All the motor, driver and control ...