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The Dolphin LB 3809 / 4409 A belong to the Busch product family of proven Dolphin Liquid Ring vacuum pumps. You will find more information on advantages, technology, accessories and spare parts, applications as well as a complete product overview on our Dolphin LB series type page.
Series Type Page DOLPHIN LB Dolphin LB is a series of two-stage liquid ring vacuum pumps. An eccentrically mounted impeller rotates in a housing partially filled with operating fluid. The impeller blades dip into the fluid, and the centrifugal force exerted by their rotation forms a so-called liquid ring within the housing.
The pumped medium is transported in the spaces between the blades and the liquid ring. The eccentric rotation of the impeller alters the volume of these spaces, causing gas to be drawn in, compressed and expelled. Operation as a compressor is possible up to 2.0 bar(g).
Air at 20 °C. Tolerance: ± 10%
50 Hz 60 Hz
| Technical data | DOLPHIN LB 3809 A | DOLPHIN LB 4409 A |
|---|---|---|
| Nominal pumping speed | 2500 - 3800 m3/h | 2600 - 4400 m3/h |
| Ultimate pressure | 33 hPa (mbar) | 33 hPa (mbar) |
| Nominal motor rating | 90 - 150 kW | 90 - 185 kW |
| Nominal motor speed | 465 - 700 min-1 | 465 - 700 min-1 |
| Noise level (ISO 2151) | 85 dB(A) | 85 dB(A) |
| Weight approx. | 2200 kg | 2340 kg |
| Dimensions (L x W x H) | 2025 x 950 x 1410 mm | 2150 x 950 x 1410 mm |
| Gas inlet / outlet | DN 200 KF / DN 200 KF | DN 200 KF / DN 200 KF |
Dolphin LB is a series of two-stage liquid ring vacuum pumps. An eccentrically mounted impeller rotates in a housing partially filled with operating fluid. The impeller blades dip into the fluid, and the centrifugal force exerted by their rotation forms a so-called liquid ring within the housing.
The pumped medium is transported in the spaces between the blades and the liquid ring. The eccentric rotation of the impeller alters the volume of these spaces, causing gas to be drawn in, compressed and expelled. Operation as a compressor is possible up to 2.0 bar(g).
Air at 20 °C. Tolerance: ± 10%
| Technical data | DOLPHIN LB 3809 A | DOLPHIN LB 4409 A |
|---|---|---|
| Nominal pumping speed | 2500 - 3800 m3/h | 2600 - 4400 m3/h |
| Ultimate pressure | 33 hPa (mbar) | 33 hPa (mbar) |
| Nominal motor rating | 90 - 150 kW | 90 - 185 kW |
| Nominal motor speed | 465 - 700 min-1 | 465 - 700 min-1 |
| Noise level (ISO 2151) | 85 dB(A) | 85 dB(A) |
| Weight approx. | 2200 kg | 2340 kg |
| Dimensions (L x W x H) | 2025 x 950 x 1410 mm | 2150 x 950 x 1410 mm |
| Gas inlet / outlet | DN 200 KF / DN 200 KF | DN 200 KF / DN 200 KF |
