The NCB internal gear pump operates on the internal gear meshing principle. The pitch circles of the inner and outer gears are close to each other on one side, while the other side is separated by a crescent plate. The gears rotate in the same direction, helping avoid trapped liquid during operation.
This pump features a compact and well-designed structure, small size, large flow capacity, low noise, and long service life under suitable operating conditions. It is suitable for transferring a wide range of liquids, from light and volatile liquids to heavy, viscous, and even semi-solid media.
The NCB series is widely used in petroleum, chemical, grease, coating, and related industries. It is especially suitable for high-viscosity media such as soap stock, silicone oil, rosin, coatings, and similar liquids.
Working Principle & Structure
The NCB internal gear pump uses an inner gear, outer gear, crescent separator, pump body, shaft, seal, and related components to form a positive displacement transfer structure. As the inner and outer gears rotate in the same direction, the medium is drawn into the expanding cavity and carried around the crescent separator. When the gear teeth mesh again, the cavity volume decreases and the medium is discharged from the outlet.
The internal gear structure supports smooth transfer, low pulsation, and steady operation, making the pump suitable for high-viscosity and difficult-flow media under proper operating conditions.
Features & Advantages
- Internal Gear Meshing: Uses inner and outer gears with a crescent plate separator for positive displacement transfer.
- No Trapped Liquid: Same-direction gear rotation and internal structure help avoid trapped-liquid problems.
- Compact Structure: Small size with large flow capacity for industrial transfer systems.
- Low Noise Operation: Smooth meshing supports reduced operating noise.
- Wide Media Compatibility: Suitable for light, volatile, heavy, viscous, and semi-solid liquids.
- High-Viscosity Transfer: Suitable for rosin, coatings, asphalt, resin, syrup, honey, adhesive, and similar media.
Typical Applications
- Petroleum and petrochemical transfer systems
- Chemical additives, polymers, lubricating oil, wax, asphalt, and rosin transfer
- Polyester, epoxy resin, hardener, acid ester, modifier, and resin transfer
- Ink, dye, paint, solvent, rubber solution, adhesive, and glue transfer
- Pulp and paper applications, including glue, adhesive, black liquor, and caustic soda
- Daily chemical applications, including sulfonic acid, alkylbenzene, fatty alcohol, detergent, shaving cream, cream, shampoo, and soap liquid
- Food applications, including vegetable oil, grease, syrup, chocolate, yeast, protein, honey, and flavoring
- Chemical fiber applications, including viscose, caustic soda, and dye
- Equipment systems, including polyester equipment, chocolate equipment, lubricating oil circulation, printing machinery, asphalt machinery, and asphalt trucks
Technical Specifications
| Model | Inlet / Outlet Size | Flow Rate | Pressure | Suction Vacuum | Speed (r/min) | Motor Model | Motor Power (kW) | Assembly Type | Weight (kg) | Overall Dimensions |
|---|---|---|---|---|---|---|---|---|---|---|
| NCB-1.2/0.3 | G1" | 1.2 | 0.3 | 0.03 | 500 | Y90L-6 | 1.1 | W-L | 10 | 234×140×140 |
| NCB-1.8/0.3 | G1-1/2" | 1.8 | 0.3 | 0.03 | 500 | — | 1.5 | W-L | 11 | 254×153×153 |
| NCB-3/0.3 | G1-1/2" | 3 | 0.3 | 0.03 | 700 | Y100L-6 | 1.5 | W-L | — | — |
| NCB-6/0.5 | 40 | 6 | 0.5 | 0.05 | 500 | — | 3 | W-L | 70 | 700×370×300 |
| NCB-8/0.5 | 40 | 8 | 0.5 | 0.05 | 570 | Y100L2-4 | 3 | W-L | — | — |
| NCB-12/0.5 | 50 | 12 | 0.5 | 0.05 | 690 | Y132M1-6 | 4 | W-L | 140 | 800×550×420 |
| NCB-16/0.5 | 50 | 16 | 0.5 | 0.05 | 380 | Y132M2-6 | 5.5 | W-L | — | — |
| NCB-20/0.5 | 50 | 20 | 0.5 | 0.05 | 460 | Y132M-4 | 7.5 | W-L | — | — |
| NCB-12/0.7 | 80 | 12 | 0.7 | 0.05 | 220 | Y160M-6 | 7.5 | W-L | 330 | 910×780×500 |
| NCB-18/0.7 | 80 | 18 | 0.7 | 0.05 | 310 | Y160L-6 | 11 | W-L | — | — |
| NCB-24/0.5 | 80 | 24 | 0.5 | 0.05 | 420 | Y10M-4 | 11 | W-L | — | — |
| NCB-30/0.5 | 80 | 30 | 0.5 | 0.05 | 520 | Y160L-4 | 15 | W-L | — | — |
| NCB-40/0.5 | 125 | 40 | 0.5 | 0.06 | 230 | Y200L1-6 | 18.5 | W-L | 750 | 1240×1022×610 |
| NCB-50/0.5 | 125 | 50 | 0.5 | 0.06 | 290 | Y200L2-6 | 22 | W-L | — | — |
| NCB-60/0.5 | 125 | 60 | 0.5 | 0.06 | 350 | Y200L2-6 | 22 | W-L | — | — |
| NCB-70/0.5 | 125 | 70 | 0.5 | 0.06 | 410 | Y225M-6 | 30 | W-L | — | — |
| NCB-80/0.5 | 125 | 80 | 0.5 | 0.06 | 470 | Y200L-4 | 30 | W-L | — | — |
| NCB-100/0.5 | 150 | 100 | 0.5 | 0.06 | 320 | Y280S-6 | 45 | W-L | — | — |
| NCB-120/0.5 | 150 | 120 | 0.5 | 0.06 | 380 | Y280M-6 | 55 | W-L | — | — |
| NCB-150/0.5 | 150 | 150 | 0.5 | 0.06 | 480 | Y280S-4 | 75 | W-L | — | — |