Screw Pump, Progressing Cavity Pump, Stator manufacturer / supplier in China, offering Screw Pump Used for Classification Society Ng Standard Single Screw Pump, Np Metering Screw Pump Dosing of Chemical Agent with High Quality and Competitive Price, Screw Pump Ng70-1 Spare Parts Stator, Rotor, Coupling Rod, Intermediate Shaft, Meachnical Seal etc. and so on.