DUPLOMATIC 1P External Gear Pump Specification
The 1P series is DUPLOMATIC’s compact, lightweight fixed-displacement external gear pump. It has no axial clearance compensation (different construction from GP1), designed for light-to-medium duty hydraulic power units, small machine tools, auxiliary sanitation equipment and compact power packs. Displacement range: 1.6～11.5 cm³/rev. Max continuous pressure for standard version: 230 bar, peak pressure 260 bar. Rotation: clockwise(R) / counter-clockwise(L). 4-bolt rectangular flange mounting. Recommended hydraulic oil viscosity: 25～100 cSt, operating temperature: -15～+80℃.
Model code definition: 1P-0016R95F/20N
- 1P: Pump series
- 00xx: Displacement code
- R = Clockwise; L = Counter-clockwise
- 95 = Shaft type
- F = Flange port; B = Threaded port
- 20 = Version
- N = Nitrile seal
Basic displacement sizes (10 variants): 0016, 0020, 0025, 0033, 0042, 0050, 0058, 0067, 0075, 0092, 0115.
Table below lists 50 popular market models (combinations of base displacement + rotation + shaft + port + seal).
1P Series Gear Pumps Models
| Full Model | Displacement cm³/rev | Theoretical Flow @1500rpm L/min | Continuous Pressure bar | Peak Pressure bar | Max Speed rpm |
|---|---|---|---|---|---|
| 1P-0016R95F/20N | 1.6 | 2.4 | 230 | 260 | 6000 |
| 1P-0016L95F/20N | 1.6 | 2.4 | 230 | 260 | 6000 |
| 1P-0016R95B/20N | 1.6 | 2.4 | 230 | 260 | 6000 |
| 1P-0016L95B/20N | 1.6 | 2.4 | 230 | 260 | 6000 |
| 1P-0020R95F/20N | 2.0 | 3.0 | 230 | 260 | 6000 |
| 1P-0020L95F/20N | 2.0 | 3.0 | 230 | 260 | 6000 |
| 1P-0020R95B/20N | 2.0 | 3.0 | 230 | 260 | 6000 |
| 1P-0020L95B/20N | 2.0 | 3.0 | 230 | 260 | 6000 |
| 1P-0025R95F/20N | 2.5 | 3.8 | 230 | 260 | 5000 |
| 1P-0025L95F/20N | 2.5 | 3.8 | 230 | 260 | 5000 |
| 1P-0025R95B/20N | 2.5 | 3.8 | 230 | 260 | 5000 |
| 1P-0025L95B/20N | 2.5 | 3.8 | 230 | 260 | 5000 |
| 1P-0033R95F/20N | 3.3 | 5.0 | 210 | 240 | 5000 |
| 1P-0033L95F/20N | 3.3 | 5.0 | 210 | 240 | 5000 |
| 1P-0033R95B/20N | 3.3 | 5.0 | 210 | 240 | 5000 |
| 1P-0033L95B/20N | 3.3 | 5.0 | 210 | 240 | 5000 |
| 1P-0042R95F/20N | 4.2 | 6.3 | 210 | 240 | 5000 |
| 1P-0042L95F/20N | 4.2 | 6.3 | 210 | 240 | 5000 |
| 1P-0042R95B/20N | 4.2 | 6.3 | 210 | 240 | 5000 |
| 1P-0042L95B/20N | 4.2 | 6.3 | 210 | 240 | 5000 |
| 1P-0050R95F/20N | 5.0 | 7.5 | 210 | 240 | 4500 |
| 1P-0050L95F/20N | 5.0 | 7.5 | 210 | 240 | 4500 |
| 1P-0050R95B/20N | 5.0 | 7.5 | 210 | 240 | 4500 |
| 1P-0050L95B/20N | 5.0 | 7.5 | 210 | 240 | 4500 |
| 1P-0058R95F/20N | 5.8 | 8.7 | 190 | 220 | 4500 |
| 1P-0058L95F/20N | 5.8 | 8.7 | 190 | 220 | 4500 |
| 1P-0058R95B/20N | 5.8 | 8.7 | 190 | 220 | 4500 |
| 1P-0058L95B/20N | 5.8 | 8.7 | 190 | 220 | 4500 |
| 1P-0067R95F/20N | 6.7 | 10.1 | 190 | 220 | 4000 |
| 1P-0067L95F/20N | 6.7 | 10.1 | 190 | 220 | 4000 |
| 1P-0067R95B/20N | 6.7 | 10.1 | 190 | 220 | 4000 |
| 1P-0067L95B/20N | 6.7 | 10.1 | 190 | 220 | 4000 |
| 1P-0075R95F/20N | 7.5 | 11.3 | 190 | 220 | 3500 |
| 1P-0075L95F/20N | 7.5 | 11.3 | 190 | 220 | 3500 |
| 1P-0075R95B/20N | 7.5 | 11.3 | 190 | 220 | 3500 |
| 1P-0075L95B/20N | 7.5 | 11.3 | 190 | 220 | 3500 |
| 1P-0092R95F/10N | 9.2 | 13.8 | 160 | 210 | 3000 |
| 1P-0115R95F/10N | 11.5 | 17.3 | 160 | 210 | 2100 |
| 1P-0016R95F/10N | 1.6 | 2.4 | 230 | 260 | 6000 |
| 1P-0025R95F/10N | 2.5 | 3.8 | 230 | 260 | 5000 |
| 1P-0033R95F/10N | 3.3 | 5.0 | 210 | 240 | 5000 |
| 1P-0042R95F/10N | 4.2 | 6.3 | 210 | 240 | 5000 |
| 1P-0050R95F/10N | 5.0 | 7.5 | 210 | 240 | 4500 |
| 1P-0058R95F/10N | 5.8 | 8.7 | 190 | 220 | 4500 |
| 1P-0067R95F/10N | 6.7 | 10.1 | 190 | 220 | 4000 |
| 1P-0075R97F/20N | 7.5 | 11.3 | 190 | 220 | 3500 |
| 1P-0092R97F/20N | 9.2 | 13.8 | 160 | 210 | 3000 |
| 1P-0115R97F/20N | 11.5 | 17.3 | 160 | 210 | 2100 |
| 1P-0020R97F/20N | 2.0 | 3.0 | 230 | 260 | 6000 |
| 1P-0042R97F/20N | 4.2 | 6.3 | 210 | 240 | 5000 |
Notes
- F = Flange port; B = Threaded port; 95/97 = Different shaft types; 20N/10N = Seal version. R=Clockwise, L=Counter-clockwise (viewed from shaft end).
- The 1P is an economical basic gear pump, no H high-pressure version. Unlike GP1, it has no axial clearance compensation and slightly lower volumetric efficiency, suitable for lightweight hydraulic systems with moderate pressure requirements.
- 1P can be assembled as tandem double pump (1P+1P /1P+GP1), widely used for small hydraulic stations, lifting platforms and auxiliary pumps for small agricultural machinery.
- Flow value is theoretical flow @1500 rpm. Actual delivery flow shall deduct volumetric efficiency loss.
- No additional radial or axial external load is allowed on pump shaft.
