| Pump Type | External Gear Motor |
| Displacement Range | Min 20cc/rev, Max 36cc/rev |
| Pressure Rating | Rated Pressure 25Mpa, Max Pressure 28Mpa |
| Speed Range | Min 500 RPM, Max 3000 RPM |
| Material | Aluminum Alloy |
| Mounting Type | See offer drawing |
| Rotation | Counter-clockwise or clockwise |
| Key Features | High Performance |
| OEM Manufactured Compatibility | Rexroth |
| MOQ | 10 PCS |
| Operating conditions | ||||||||||
| Size | 20 | 22 | 25 | 28 | 32 | 36 | ||||
| Series | 1x | |||||||||
| Displacement geometric,per revolution | Vg | cm³ | 20 | 22.5 | 25 | 28 | 32 | 36 | ||
| Motor inlet pressure | start up pressure | Pstartup | bar | 50 | 50 | 50 | 50 | 50 | 50 | |
| maximum continuous pressure | p₁ | bar | 230 | 230 | 230 | 210 | 180 | 160 | ||
| maximum intermittent pressure²) | p₂ | bar | 250 | 250 | 250 | 230 | 200 | 180 | ||
| maximum pressure peak | ps | bar | 270 | 270 | 270 | 250 | 220 | 200 | ||
| minimum inlet pressure absolute³) |
Pmin | bar | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | 0.7 | ||
| Motor output pressure for |
bi-directional motors | pA | bar | ≤continuous pressure | ||||||
| non-bi-directional | absolute | PA | bar | 3 | 3 | 3 | 3 | 3 | 3 | |
| motors | upon start-up | PA | bar | 10 | 10 | 10 | 10 | 10 | 10 | |
| Maximum pressure in the drain port) | absolute | pL | bar | 3 | 3 | 3 | 3 | 3 | 3 | |
| upon start-up | pL | bar | 10 | 10 | 10 | 10 | 10 | 10 | ||
| Minimum rotational speed at |
v=12mm²/s | p<100 bar | nmin | rpm | 500 | 500 | 500 | 500 | 500 | 500 |
| p=100…180 bar | nmin | rpm | 600 | 600 | 600 | 600 | 600 | 600 | ||
| p=180 bar….P2 | nmin | rpm | 800 | 800 | 800 | 800 | 800 | 800 | ||
| v=25mm²/s | at p₂ | nmin | rpm | 500 | 500 | 500 | 500 | 500 | 500 | |
| Maximum rotational speed | at p₂ | max | rpm | 3000 | 3000 | 3000 | 2800 | 2800 | 2800 | |
| NG | Order number Direction of rotation Counter-clockwise |
Maximum intermittent pressure p₂ [bar] |
Maximum rotational speed [rpm] |
Dimensions | ||
| A | B | C | ||||
| 25 | 0511725307 | 210 | 3000 | 55 | 116.1 | M8;min.13 deep |
| 28 | 0511725309 | 200 | 3000 | 56.6 | 119.1 | |
| Symbol | Description |
| Vg | Displacement per revolution [cm³] |
| △p | Differential pressure [bar](△p=p₁-PA) |
| n | Rotational speed [rpm] |
| qv | Inlet flow [L/min] |
| M | Torque [Nm] |
| P | Power [kW] |
| ηv | Volumetric efficiency1) |
| ηhm | Hydraulic-mechanical efficiency²) |
| ηt | Total efficiency(ηt=ηv×ηhm)²) |
| Customization Item | Available Options |
| Drive Shafts | Tapered keyed shaft |
| Parallel keyed shaft (SAE) | |
| Splined shaft (SAE) | |
| Front covers | Rectangular flange spigot |
| 2-bolt flange SAE | |
| Port Connections | UN-thread acc. to IS0 11926-1/ASME B 1.1,0-ring¹) |
| Square flange | |
| Sealing Materials | NBR (nitrile rubber) |
| FKM (fluoroelastomer) | |
| NBR (nitrile rubber) | |
| Direction of Rotation | Clockwise |
| Counter-clockwise |
