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Specifications

Pump Model Flange Connections Dimensions (Inches)
Discharge Connection Sizes Suction Connection Sizes A B C D E F
Cast F.E. 1 (25.4)-11 1/2 FNPT 2 (50.8)-11 1/2 FNPT 3 3/8 4 7/8 19 1/2 22 5/8 30 3/8 5 5/16
Forged F.E. 1 (25.4)-11 1/2 FNPT 2 (50.8)-11 1/2 FNPT 3 1/2 4 7/8 20 20 3/8 30 3/8 6 3/16

Performance Data

PUMP English Units 50 RPM 150 RPM 250 RPM 350 RPM 400 RPM 490 RPM
Plunger Dia. In. Plunger Area Sq. In. BPD per RPM GPM per RPM Max. Press. PSI BPD GPM BPD GPM BPD GPM BPD GPM BPD GPM BPD GPM
31Q-2L (5P200A) 1.750 2.4053 4.0162 0.1171 844 201 5.86 603 17.6 1005 29.3 1406 41.0 1607 46.9 1968 57.4
1.625 2.0739 3.4630 0.1010 979 174 5.05 520 15.2 866 25.3 1213 35.4 1386 40.4 1697 49.5
1.500 1.7671 2.9507 0.0861 1149 148 4.30 443 12.9 738 21.5 1033 30.1 1181 34.4 1446 42.2
1.375 1.4849 2.4794 0.0723 1367 124 3.62 372 10.8 620 18.1 868 25.3 992 28.9 1215 35.4
1.250 1.2272 2.0491 0.0598 1654 103 2.99 308 8.96 513 14.9 718 20.9 820 23.9 1005 29.3
1.125 0.9940 1.6598 0.0484 2042 83 2.42 249 7.26 415 12.1 581 16.9 664 19.4 814 23.7
  Brake Horsepower required 4 10 17 22 26 31
PUMP Metric Units 50 RPM 150 RPM 200 RPM 250 RPM 350 RPM 400 RPM
Plunger Dia. mm Plunger Area cm2 M3/Hr per RPM L/Sec. per RPM Max. Press. kPa M3/Hr L/Sec. M3/Hr L/Sec. M3/Hr L/Sec. M3/Hr L/Sec. M3/Hr L/Sec. M3/Hr L/Sec.
31Q-2L (5P200A) 44 15.518 0.0266 0.0074 5819 1.33 0.37 3.99 1.11 6.65 1.85 9.31 2.59 10.64 2.96 13.04 3.62
41 13.380 0.0229 0.0064 6749 1.15 0.32 3.44 0.96 5.73 1.59 8.03 2.23 9.18 2.55 11.24 3.12
38 11.401 0.0195 0.0054 7920 0.98 0.27 2.93 0.81 4.89 1.36 6.84 1.90 7.82 2.17 9.58 2.66
35 9.580 0.0164 0.0046 9426 0.82 0.23 2.46 0.68 4.11 1.14 5.75 1.60 6.57 1.82 8.05 2.24
32 7.917 0.0136 0.0038 11405 0.68 0.19 2.04 0.57 3.39 0.94 4.75 1.32 5.43 1.51 6.65 1.85
29 6.413 0.0110 0.0031 14081 0.55 0.15 1.65 0.46 2.75 0.76 3.85 1.07 4.40 1.22 5.39 1.50
  Kilowatts Required 3.0 7.5 13 17 19 23

For operation below 75 RPM, an auxiliary lubrication system is required.

Volumetric Rate is based on 100% Volumetric Efficiency. Brake Horsepower/Kilowatts Required is based on 90% Mechanical Efficiency.

The information and data on this sheet is accurate to the best of our knowledge and belief, but are intended for general information only. Applications suggested for the materials are described only to help readers make their own evaluations and decisions, and are neither guarantees nor to be construed as express or implied warranties of suitability for these or other applications. National Oilwell makes no warranty either express or implied beyond that stipulated in National Oilwell Standard Terms and Conditions of Sale

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IEQ Industries

P.O. Box 123 Ada, MI 49301 Phone: 800.544.9053 Fax: 888.796.2653