Self priming metal rotary lobe pump

Self-priming metal rotary lobe pump adopts all-metal rotor construction. Benefiting from outstanding self-priming capability, it can directly suck media from tank bottoms and pools without foot valve or pre-filling. As a positive displacement rotary transfer pump, the synchronously counter-rotating rotors impose minimal shear on materials and steadily deliver high-viscosity, abrasive fluids with hard solid particles. The pump supports forward and reverse pumping. Modular components facilitate fast on-site maintenance. Wear-resistant and heat-resistant metal rotors make it suitable for challenging media including petroleum sludge, chemical slag slurry, municipal sludge and paper pulp.

Working Principle:

• Stage 1:A pair of closely meshing rotors rotate in opposite directions, progressively expelling the air at the suction end and thereby creating a vacuum there, so that the medium is forced in by atmospheric pressure.
• Stage 2:The medium enters the sealed chambers between the rotors and the pump chamber and is progressively pushed by the rotors toward the discharge end.
• Stage 3:The medium is continuously pushed toward the discharge end by the rotors.
• Stage 4:The medium fills the entire pump chamber and, as the driver runs, continuous transfer of the medium is achieved.

Single-Bearing Support Structure Drawing:

NO.	Description	Qty.
1	Single Support Pump Cover	1
2	Pump Casing	1
3	Rotor	2
4	Driven Shaft	1
5	Inner Mechanical Seal	2
6	Gearbox	1
7	Timing Gear	1
8	Connecting Body	1
9	Shaft Gear	1
10	Transmission Gearbox	1
11	Reduction Gear	1
12	Main Shaft	1
13	Flat Liner Plate	2

Double-Bearing Support Structure Drawing:

No.	Description	Qty.
1	Double-Support End Cover	1
2	Pump Casing	1
3	Rotor	2
4	Driven Shaft	1
5	Inner Mechanical Seal	2
6	Gearbox	1
7	Timing Gear	1
8	Connecting Body	1
9	Shaft Gear	1
10	Variable-Speed Gearbox	1
11	Reduction Gear	1
12	Main Shaft	1
13	Flat Gasket	2
14	Outer Mechanical Seal	2

Metal Rotor:

Product Features:

1. Defined clearances and no metal-to-metal contact between rotor and rotor or between rotor and casing give a long service life.
2. A modular design concept: the same pump model can be supplied with different rotor types (2-lobe, 3-lobe, 5-lobe), all interchangeable, and can be matched to the required product passage rate, suction-lift requirement and viscosity. A wide range of materials is available (carbon steel, 304 SS, 316L SS, 2205 duplex, 2507 super duplex, etc.).
3. Can handle media with a viscosity of 10,000 – 100,000 cP as well as media with a low solids content in fine particles.
4. Simple rotor structure, easy to maintain and replace.

Applications:

Widely used in oil fields, food and pharmaceutical production, fine chemicals, new-energy lithium battery manufacturing, paper-making and shipbuilding, and suitable for transferring and unloading heavy oil, slurries, pastes and other complex media. The pumps meet a variety of process requirements, including hygienic, wear-resistant and corrosion-resistant duty.

Performance Parameters: