Products
Quiet Hydraulic Pumps
Lalmek’s quiet hydraulic pumps resemble gear pumps on the outside, but their internal design is dramatically different. Thanks to a well-thought-out design of the pump’s rotating parts, a steady oil flow is achieved, which minimizes vibrations and significantly reduces noise levels. In addition, energy consumption is reduced and efficiency is increased.
Depending on the pump size, the noise level can be reduced to 52–63 dB(A) at 2,950 rpm. The pumps are available in sizes ranging from 4 to 200 cm³ or from 6 to 300 l/min at 1,500 rpm.
GR28 Type 1
| Displacement (cm³/rev) | Flow (l/min) | Nominal pressure (bar) | Intermittent pressure (bar) | Peak pressure (bar) |
|---|---|---|---|---|
| 4.2 | 6.0 | 275 | 280 | 300 |
| 6.4 | 9.2 | 275 | 280 | 300 |
| 8.3 | 12.0 | 246 | 260 | 280 |
At 1,450 rpm. Intermittent cycle: 20 sec ON / 3 sec OFF. Peak cycle: 1 sec ON / 3 sec OFF.
GR33 Type 2
| Displacement (cm³/rev) | Flow (l/min) | Nominal pressure (bar) | Intermittent pressure (bar) | Peak pressure (bar) |
|---|---|---|---|---|
| 10.1 | 14.5 | 275 | 280 | 300 |
| 12.6 | 18.1 | 265 | 270 | 290 |
At 1,450 rpm.
GR38 Type 2
| Displacement (cm³/rev) | Flow (l/min) | Nominal pressure (bar) | Intermittent pressure (bar) | Peak pressure (bar) |
|---|---|---|---|---|
| 15.9 | 22.8 | 265 | 280 | 300 |
| 17.9 | 25.8 | 247 | 206 | 280 |
| 20.0 | 28.8 | 230 | 250 | 270 |
| 22.1 | 31.8 | 222 | 250 | 270 |
At 1,450 rpm.
GR47 Type 3
| Displacement (cm³/rev) | Flow (l/min) | Nominal pressure (bar) | Intermittent pressure (bar) | Peak pressure (bar) |
|---|---|---|---|---|
| 28.0 | 40.3 | 270 | 280 | 300 |
| 32.2 | 46.3 | 252 | 270 | 280 |
| 36.3 | 52.3 | 239 | 250 | 270 |
| 40.5 | 58.3 | 225 | 250 | 270 |
| 45.1 | 65.0 | 213 | 250 | 270 |
| 50.3 | 72.4 | 202 | 250 | 270 |
At 1,450 rpm.