QGD Series Submersible Screw Pump/water pump/pump

BRIEF INTRODUCTION AND STRUCTURE QG series is a sand-proof small size submersible screw pump. The Main technical performances of the pump approached the advanced level of develop country for same kind products. The main advantages of the pump are as following: 1. High head: so the pump has widely application range. 2. High efficiency: the efficiency of the pump unit is higher than the centrifugal submersible pump 5% within the rated head range. The obvious effect is saving energy. 3. Small diameter of the pump casing is convenient for customer application. QG series sand-proof small size submersiblescrew pump is widely used for far distance transport water, Irrigation, spray, high building, factory, mine and family as watersupply pump, also for cultivation, refrigeration and industry field. STRUCTURE DESCRIPTION QG series of sand-proof small size submersible screw pump mainly is consisted of submersible motor, single screw pump andseal, single phase or three phase asynchronous motor is dry type or oil-filled type construction. The motor is positioned underthe pump and submerged in water, so the heat dissipation effect is very good.The single screw pump is consisted of a single helix resilience rubber stator and creates a continuously forming cavity as itrotates. This cavity which carring pumped liquid from inlet progresses towards the discharge end. The motor adopts O sealing ring and double end face mechanical seal. Function of seal is reliable and long working life. Motor and Pump - Motor Rewindable motor Three-phase: 380V - 415V /50Hz Single-phase: 220V - 240V /50Hz Insulation class: B Protection grade: IP 58 Highest temperature of liquid:40°C - Pump Rated capacity 0.8 to 2.5 (m3 /h) rated total head from 50 to 120(m) INTRODUCTION MODELS AND PERFORMANCE PERFORMANCE CHART AT n=2850rpm