1)Driving gear (outside rotor) with internal tooth drives the internal rotor and turns in same direction in the full closed pump body. The pump casing and crescent of the front cover separate the inlet from the outlet. When it turns, negative pressure formed at the suction port, the liquid inhaled and being take to the outlet by rotor, then the liquid is expelled from the discharge port as the gears mesh, The transportation of liquid finished.
2)NYP series 2 inch high viscosity pumps are mainly composed of internal rotor, outside rotor, shaft, pump casing, front cover, seal, bearing, etc.
The pump seal adopts packing seal or mechanical seal, when the delivered medium is high temperature, high viscosity or strong corrosion, packing seal should be adopted.

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