The NYP high-viscosity internal gear pump is a new type of positive displacement pump developed for the needs of petroleum, chemical, coating, grease, pharmaceutical, dye, food, and related industries. Because different material configurations can be selected, the pump can be used for media with different properties and different viscosity ranges.
The applicable medium temperature is from -10°C to 200°C. For NYP0.78 and NYP2.3 models, the applicable temperature range is from -10°C to 80°C. The applicable viscosity range is from 1.0 cSt to 300,000 cSt. For NYP0.78 and NYP2.3 models, the applicable viscosity range is from 1.0 cSt to 10,000 cSt.
The NYP series is suitable for transferring high-viscosity, high-concentration polymer media and similar lubricating media. The pump can be equipped with an insulation jacket, making it suitable for high-viscosity media that crystallize or solidify at normal temperature.
Structure & Working Features
The NYP high-viscosity internal gear pump consists of the pump body, bracket, front cover, inner and outer rotors, shaft, mechanical seal sleeve, gland, and related components. It is a positive displacement internal rotor pump.
The inner and outer rotors rotate in the same direction, helping reduce wear and support long service life under suitable operating conditions. The pump provides smooth liquid transfer with low pulsation, low vibration, low noise, stable operation, compact size, and strong self-priming performance.
The pump speed and flow rate have an approximately linear relationship, so the flow rate can be adjusted by changing the pump speed.
Features & Advantages
- Smooth, Low-Pulsation Flow: Delivers liquid steadily with low vibration and low operating noise.
- Strong Self-Priming Performance: Suitable for process transfer systems requiring reliable suction performance.
- Material Selection Flexibility: Proper material selection allows the pump to handle different types of media, including some corrosive media.
- Same-Direction Rotor Rotation: Inner and outer rotors rotate in the same direction to reduce wear.
- Flow Control by Speed: Flow can be adjusted by changing the pump speed.
- High-Viscosity Capability: Especially suitable for high-viscosity and high-consistency media.
- Jacketed Option: Insulation jacket can be used for crystallizing, solidifying, or temperature-sensitive high-viscosity media.
Typical Applications
- Lubricating oil and crude oil transfer
- Rubber, asphalt, paint, adhesive, dye, and coating transfer
- Lubricant and polyol transfer
- High-viscosity resin transfer
- Polyurethane and polyether media transfer
- Polyethylene and similar high-viscosity polymer media transfer
- Food and pharmaceutical material transfer when the selected material configuration is suitable
- High-temperature, high-viscosity polymer melt transfer without particulate impurities
Technical Specifications
In the following table, each pressure column shows shaft power / flow rate in kW / L/min.
| Model | Nominal Diameter (mm) | Theoretical Displacement (L/100 rev) | Viscosity (cSt) | Speed (r/min) | 0.4 MPa | 0.6 MPa | 0.8 MPa | 1.0 MPa | Connection |
|---|---|---|---|---|---|---|---|---|---|
| NYP0.78 | 15 | 0.78 | 20 | 1390 | 0.17 / 9.3 | 0.23 / 9.0 | 0.28 / 8.8 | 0.32 / 8.6 | G1/2" |
| NYP0.78 | 15 | 0.78 | 60 | 1390 | 0.18 / 9.5 | 0.24 / 9.2 | 0.28 / 9.0 | 0.33 / 8.9 | G1/2" |
| NYP0.78 | 15 | 0.78 | 200 | 1390 | 0.31 / 10.4 | 0.35 / 10.2 | 0.39 / 10.0 | 0.43 / 9.9 | G1/2" |
| NYP0.78 | 15 | 0.78 | 600 | 1390 | 0.39 / 10.4 | 0.44 / 10.3 | 0.48 / 10.3 | 0.52 / 10.2 | G1/2" |
| NYP0.78 | 15 | 0.78 | 2000 | 910 | 0.23 / 6.8 | 0.27 / 6.8 | 0.30 / 6.8 | 0.33 / 6.7 | G1/2" |
| NYP0.78 | 15 | 0.78 | 6000 | 720 | 0.24 / 5.4 | 0.31 / 6.1 | 0.30 / 6.8 | 0.40 / 6.8 | G1/2" |
| NYP2.3 | 25 | 2.3 | 20 | 1400 | 0.38 / 28.4 | 0.49 / 27.5 | — | — | G1" |
| NYP2.3 | 25 | 2.3 | 60 | 1400 | 0.59 / 29.2 | 0.65 / 28.8 | — | — | G1" |
| NYP2.3 | 25 | 2.3 | 200 | 1400 | 0.61 / 30.0 | 0.72 / 29.6 | — | — | G1" |
| NYP2.3 | 25 | 2.3 | 600 | 1400 | 0.92 / 31.9 | 0.96 / 31.7 | — | — | G1" |
| NYP2.3 | 25 | 2.3 | 2000 | 910 | 0.61 / 19.9 | 0.68 / 19.7 | — | — | G1" |
| NYP2.3 | 25 | 2.3 | 6000 | 720 | 0.77 / 16.32 | 0.83 / 16.2 | — | — | G1" |
| NYP3.6 | 40 | 3.6 | 20 | 1450 | 0.69 / 46.7 | 0.94 / 45.9 | 1.18 / 45 | 1.44 / 43.4 | Flange |
| NYP3.6 | 40 | 3.6 | 60 | 1450 | 0.81 / 47.5 | 1.09 / 46.7 | 1.37 / 45.9 | 1.57 / 44.7 | Flange |
| NYP3.6 | 40 | 3.6 | 200 | 1450 | 1.06 / 49.7 | 1.31 / 49.2 | 1.56 / 48.8 | 1.79 / 47.3 | Flange |
| NYP3.6 | 40 | 3.6 | 600 | 1450 | 1.45 / 49.9 | 1.61 / 49.6 | 1.77 / 49.3 | 1.93 / 49 | Flange |
| NYP3.6 | 40 | 3.6 | 2000 | 960 | 1.28 / 34.3 | 1.41 / 33.8 | 1.54 / 33.7 | 1.65 / 33.6 | Flange |
| NYP3.6 | 40 | 3.6 | 6000 | 640 | 1.08 / 23.0 | 1.18 / 22.9 | 1.28 / 22.9 | 1.37 / 22.8 | Flange |
| NYP3.6 | 40 | 3.6 | 20000 | 583 | 1.22 / 20.5 | 1.24 / 20.4 | 1.25 / 20.4 | 1.38 / 20.3 | Flange |
| NYP3.6 | 40 | 3.6 | 60000 | 455 | 0.84 / 16.3 | 0.91 / 16.2 | 0.98 / 16.1 | 1.01 / 16 | Flange |
| NYP7.0 / NYP7.0A | 40 | 7.0 | 20 | 1450 | 1.36 / 98.1 | 1.8 / 96 | 2.0 / 94.7 | 2.4 / 93 | Thread |
| NYP7.0 / NYP7.0A | 40 | 7.0 | 60 | 1450 | 1.45 / 99 | 1.9 / 97 | 2.2 / 96.4 | 2.6 / 95 | Thread |
| NYP7.0 / NYP7.0A | 40 | 7.0 | 200 | 1450 | 1.62 / 99.8 | 2.0 / 98 | 2.3 / 97.5 | 2.7 / 97 | Thread |
| NYP7.0 / NYP7.0A | 40 | 7.0 | 600 | 960 | 1.4 / 62 | 1.6 / 65 | 1.8 / 44 | 2.0 / 64 | Thread |
| NYP7.0 / NYP7.0A | 40 | 7.0 | 2000 | 960 | 1.8 / 67 | 2.0 / 66 | 2.3 / 65 | 2.6 / 65 | Thread |
| NYP7.0 / NYP7.0A | 40 | 7.0 | 6000 | 640 | 1.5 / 44.5 | 1.7 / 44 | 1.8 / 44 | 2.0 / 44 | Thread |
| NYP7.0 / NYP7.0A | 40 | 7.0 | 20000 | 583 | 1.6 / 40.5 | 1.9 / 40 | 2.1 / 40 | 2.2 / 40 | Thread |
| NYP7.0 / NYP7.0A | 40 | 7.0 | 60000 | 455 | 1.46 / 31.5 | 1.8 / 31 | 1.9 / 31 | 2.0 / 31 | Thread |
| NYP24 | 50 | 24 | 20 | 720 | 1.8 / 165 | 2.3 / 161 | 2.8 / 158 | 3.4 / 155 | Flange |
| NYP24 | 50 | 24 | 60 | 720 | 2.0 / 166 | 2.6 / 164 | 3.1 / 162 | 3.7 / 158 | Flange |
| NYP24 | 50 | 24 | 200 | 610 | 1.9 / 143 | 2.5 / 141 | 3.0 / 139 | 3.5 / 136 | Flange |
| NYP24 | 50 | 24 | 600 | 541 | 2.1 / 127 | 2.6 / 125 | 3.0 / 124 | 3.5 / 122 | Flange |
| NYP24 | 50 | 24 | 2000 | 475 | 2.2 / 112 | 2.6 / 111 | 2.9 / 110 | 3.4 / 109 | Flange |
| NYP24 | 50 | 24 | 6000 | 357 | 2.0 / 85 | 2.3 / 84 | 2.6 / 83 | 2.9 / 83 | Flange |
| NYP24 | 50 | 24 | 20000 | 303 | 1.9 / 72 | 2.2 / 72 | 2.4 / 72 | 2.6 / 71 | Flange |
| NYP24 | 50 | 24 | 60000 | 228 | 1.6 / 54 | 1.8 / 54 | 2.0 / 54 | 2.3 / 54 | Flange |
| NYP52 / NYP52A | 50 | 52 | 20 | 720 | 4.3 / 362 | 5.8 / 355 | 6.9 / 348 | 8.1 / 340 | Thread |
| NYP52 / NYP52A | 50 | 52 | 60 | 720 | 4.7 / 364 | 6.2 / 358 | 7.3 / 352 | 7.5 / 346 | Thread |
| NYP52 / NYP52A | 50 | 52 | 200 | 610 | 4.6 / 309 | 5.9 / 304 | 6.9 / 300 | 8.0 / 294 | Thread |
| NYP52 / NYP52A | 50 | 52 | 600 | 541 | 4.9 / 275 | 6.0 / 271 | 6.8 / 268 | 7.8 / 264 | Thread |
| NYP52 / NYP52A | 50 | 52 | 2000 | 475 | 5.0 / 243 | 5.9 / 238 | 6.6 / 237 | 7.6 / 235 | Thread |
| NYP52 / NYP52A | 50 | 52 | 6000 | 357 | 4.1 / 184 | 4.9 / 182 | 5.3 / 181 | 6.2 / 180 | Thread |
| NYP52 / NYP52A | 50 | 52 | 20000 | 303 | 3.8 / 157 | 4.6 / 156 | 5.1 / 155 | 5.6 / 155 | Thread |
| NYP52 / NYP52A | 50 | 52 | 60000 | 228 | 3.1 / 119 | 3.7 / 118 | 4.0 / 118 | 4.5 / 118 | Thread |
| NYP80 | 80 | 80 | 20 | 615 | 5.2 / 471 | 6.9 / 461 | 8.5 / 451 | 10.0 / 433 | Flange |
| NYP80 | 80 | 80 | 60 | 615 | 5.5 / 474 | 7.2 / 465 | 8.8 / 457 | 10.5 / 448 | Flange |
| NYP80 | 80 | 80 | 200 | 544 | 5.7 / 421 | 7.2 / 414 | 8.6 / 408 | 10.1 / 401 | Flange |
| NYP80 | 80 | 80 | 600 | 479 | 6.0 / 372 | 7.3 / 367 | 8.5 / 362 | 9.8 / 356 | Flange |
| NYP80 | 80 | 80 | 2000 | 417 | 6.5 / 326 | 7.7 / 322 | 8.9 / 319 | 10.1 / 315 | Flange |
| NYP80 | 80 | 80 | 6000 | 305 | 5.6 / 239 | 6.6 / 237 | 7.5 / 326 | 8.4 / 233 | Flange |
| NYP80 | 80 | 80 | 20000 | 228 | 5.5 / 180 | 6.4 / 179 | 6.9 / 178 | 7.7 / 177 | Flange |
| NYP80 | 80 | 80 | 60000 | 188 | 5.5 / 149 | 6.1 / 149 | 6.7 / 149 | 7.2 / 148 | Flange |
| NYP111 / NYP111A | 80 | 111.4 | 20 | 615 | 6.7 / 660 | 9.2 / 647 | 11.2 / 634 | 13.6 / 622 | Flange |
| NYP111 / NYP111A | 80 | 111.4 | 60 | 615 | 6.9 / 664 | 9.4 / 652 | 11.5 / 642 | 13.9 / 631 | Flange |
| NYP111 / NYP111A | 80 | 111.4 | 200 | 544 | 7.1 / 589 | 9.3 / 580 | 11.0 / 573 | 13.2 / 563 | Flange |
| NYP111 / NYP111A | 80 | 111.4 | 600 | 479 | 7.3 / 521 | 9.5 / 514 | 11.1 / 508 | 13.1 / 502 | Flange |
| NYP111 / NYP111A | 80 | 111.4 | 2000 | 417 | 7.7 / 455 | 9.7 / 450 | 11.0 / 447 | 12.7 / 442 | Flange |
| NYP111 / NYP111A | 80 | 111.4 | 6000 | 305 | 6.9 / 335 | 8.4 / 332 | 9.4 / 331 | 10.6 / 328 | Flange |
| NYP111 / NYP111A | 80 | 111.4 | 20000 | 228 | 6.3 / 251 | 7.5 / 250 | 8.2 / 249 | 9.2 / 248 | Flange |
| NYP111 / NYP111A | 80 | 111.4 | 60000 | 188 | 6.2 / 209 | 7.1 / 208 | 7.6 / 208 | 8.5 / 207 | Flange |
| NYP160 | 100 | 160 | 20 | 600 | 8.9 / 930 | 12.1 / 916 | 15.3 / 902 | 17.5 / 888 | Flange |
| NYP160 | 100 | 160 | 60 | 600 | 9.4 / 935 | 12.6 / 922 | 15.8 / 910 | 19.0 / 898 | Flange |
| NYP160 | 100 | 160 | 200 | 550 | 12.3 / 866 | 15.3 / 859 | 18.3 / 852 | 21.3 / 845 | Flange |
| NYP160 | 100 | 160 | 600 | 480 | 10.2 / 754 | 12.8 / 747 | 15.4 / 740 | 18.0 / 737 | Flange |
| NYP160 | 100 | 160 | 2000 | 355 | 9.1 / 560 | 11.1 / 556 | 13.0 / 552 | 15.1 / 548 | Flange |
| NYP160 | 100 | 160 | 6000 | 319 | 10.0 / 505 | 11.7 / 502 | 13.5 / 500 | 15.2 / 497 | Flange |
| NYP220 | 125 | 220 | 20 | 430 | 8.8 / 902 | 11.9 / 880 | 15.0 / 858 | 18.0 / 836 | Flange |
| NYP220 | 125 | 220 | 60 | 430 | 9.0 / 909 | 12.0 / 890 | 15.0 / 871 | 18.0 / 852 | Flange |
| NYP220 | 125 | 220 | 200 | 355 | 8.5 / 753 | 11.1 / 739 | 13.7 / 726 | 16.3 / 713 | Flange |
| NYP220 | 125 | 220 | 600 | 320 | 9.4 / 682 | 11.8 / 671 | 14.1 / 660 | 16.5 / 649 | Flange |
| NYP220 | 125 | 220 | 2000 | 254 | 9.1 / 544 | 11.0 / 537 | 13.0 / 530 | 15.1 / 523 | Flange |
| NYP220 | 125 | 220 | 6000 | 244 | 10.1 / 483 | 11.9 / 478 | 13.6 / 473 | 15.4 / 468 | Flange |
| NYP220 | 125 | 220 | 20000 | 160 | 9.1 / 347 | 10.5 / 345 | 11.9 / 343 | 13.3 / 341 | Flange |
| NYP220 | 125 | 220 | 60000 | 117 | 8.4 / 256 | 9.4 / 255 | 10.4 / 254 | 11.4 / 253 | Flange |
| NYP320 | 125 | 320 | 20 | 430 | 13.0 / 1306 | 18.0 / 1270 | 22.0 / 1235 | 26.0 / 1200 | Flange |
| NYP320 | 125 | 320 | 60 | 430 | 13.0 / 1316 | 18.5 / 1285 | 22.0 / 1255 | 26.5 / 1225 | Flange |
| NYP320 | 125 | 320 | 200 | 355 | 11.8 / 1091 | 15.5 / 1068 | 19.1 / 1046 | 22.8 / 1024 | Flange |
| NYP320 | 125 | 320 | 600 | 320 | 13.2 / 987 | 16.5 / 968 | 19.7 / 950 | 22.9 / 932 | Flange |
| NYP320 | 125 | 320 | 2000 | 284 | 14.2 / 881 | 17.4 / 867 | 20.6 / 854 | 23.8 / 841 | Flange |
| NYP320 | 125 | 320 | 6000 | 222 | 13.7 / 693 | 16.2 / 684 | 18.7 / 675 | 21.2 / 666 | Flange |
| NYP320 | 125 | 320 | 20000 | 168 | 13.2 / 529 | 15.3 / 525 | 17.3 / 522 | 19.4 / 519 | Flange |
| NYP320 | 125 | 320 | 60000 | 125 | 12.0 / 397 | 13.7 / 396 | 15.3 / 395 | 16.9 / 394 | Flange |
| NYP650 | 150 | 650 | 20 | 315 | 19.0 / 1921 | 26.0 / 1857 | 33.0 / 1794 | — | Flange |
| NYP650 | 150 | 650 | 60 | 315 | 20.0 / 1940 | 26.4 / 1886 | 33.2 / 1832 | — | Flange |
| NYP650 | 150 | 650 | 200 | 284 | 17.9 / 1756 | 24.0 / 1711 | 30.4 / 1666 | — | Flange |
| NYP650 | 150 | 650 | 600 | 253 | 17.6 / 1572 | 22.7 / 1534 | 28.9 / 1500 | — | Flange |
| NYP650 | 150 | 650 | 2000 | 196 | 15.7 / 1225 | 20.6 / 1201 | 24.5 / 1176 | — | Flange |
| NYP650 | 150 | 650 | 6000 | 160 | 16.0 / 1008 | 19.8 / 993 | 22.3 / 978 | — | Flange |
| NYP650 | 150 | 650 | 20000 | 117 | 13.6 / 745 | 16.5 / 738 | 19.2 / 731 | — | Flange |
| NYP650 | 150 | 650 | 60000 | 100 | 15.0 / 645 | 17.2 / 643 | 19.5 / 640 | — | Flange |
| NYP727 | 150 | 727 | 20 | 315 | 21.5 / 2135 | 29.4 / 2058 | 37.3 / 1980 | — | Flange |
| NYP727 | 150 | 727 | 60 | 315 | 22.4 / 2157 | 29.8 / 2090 | 37.3 / 2026 | — | Flange |
| NYP727 | 150 | 727 | 200 | 280 | 19.6 / 1928 | 26.7 / 1874 | 33.5 / 1820 | — | Flange |
| NYP727 | 150 | 727 | 600 | 245 | 19.6 / 1696 | 25.1 / 1652 | 31.2 / 1611 | — | Flange |
| NYP727 | 150 | 727 | 2000 | 200 | 18.7 / 1394 | 23.3 / 1363 | 28.5 / 1334 | — | Flange |
| NYP727 | 150 | 727 | 6000 | 170 | 19.2 / 1195 | 23.3 / 1175 | 27.9 / 1155 | — | Flange |
| NYP727 | 150 | 727 | 20000 | 125 | 17.0 / 888 | 20.1 / 878 | 23.3 / 868 | — | Flange |
| NYP727 | 150 | 727 | 60000 | 100 | 16.8 / 720 | 19.5 / 717 | 22.3 / 713 | — | Flange |
| NYP1670 | 200 | 1670 | 20 | 250 | 38.0 / 3852 | 52.0 / 3690 | 66.0 / 3529 | — | Flange |
| NYP1670 | 200 | 1670 | 60 | 250 | 40.0 / 3900 | 54.0 / 3763 | 68.0 / 3626 | — | Flange |
| NYP1670 | 200 | 1670 | 200 | 225 | 37.5 / 3535 | 50.0 / 3424 | 62.5 / 3313 | — | Flange |
| NYP1670 | 200 | 1670 | 600 | 195 | 37.0 / 3079 | 48.0 / 2990 | 58.6 / 2900 | — | Flange |
| NYP1670 | 200 | 1670 | 2000 | 160 | 35.0 / 2547 | 44.0 / 2485 | 53.0 / 2422 | — | Flange |
| NYP1670 | 200 | 1670 | 6000 | 135 | 34.6 / 2177 | 42.0 / 2138 | 50.0 / 2100 | — | Flange |
| NYP1670 | 200 | 1670 | 20000 | 112 | 35.0 / 1830 | 41.5 / 1810 | 48.0 / 1790 | — | Flange |
| NYP1670 | 200 | 1670 | 60000 | 85 | 36.0 / 1405 | 35.7 / 1400 | 40.6 / 1392 | — | Flange |