Liquid ring vacuum pumps and compressors
DOLPHIN are the robust liquid ring vacuum pumps and compressors from Busch. This series encompasses decades of experience in the use and further development of liquid ring technology.
Their proven operating principle provides virtually isothermal (cold) compression which is especially useful for sensitive or hazardous gases.
They are the perfect solution for demanding applications. For example, the evacuation of saturated gases and vapors.
The DOLPHIN series comprises a large variety of sizes and assemblies: single- or two-stage, with a directly flange-mounted motor, or assembled on a base plate, vacuum pumps and compressors.
Operating principleDOLPHIN are single- or two-stage liquid ring vacuum pumps and compressors.
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. Thereby, the gas is drawn in, compressed and expelled.
In the single-stage versions, compression is carried out once. In the two-stage versions, the pumped medium is compressed again to allow higher vacuum levels to be achieved. Operation as a compressor is possible.
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Even demanding applications, such as evacuating saturated gases and vapors are possible without problems. Different operating fluids may be used according to process conditions.
Thanks to the modular design, various assemblies are possible. The precisely dimensioned range of sizes, a wide variety of shaft sealing options, choice of accessories and construction materials allows you to find the perfect DOLPHIN LA/LB for your process.
DOLPHIN LA are single-stage vacuum pumps whereas DOLPHIN LB have two stages for a higher vacuum.
Their modular base plate design allows these vacuum pumps to be perfectly adapted to many different industrial processes.
Various assemblies and construction materials are possible, including cast iron (EN-GJL-200) and 316 grade stainless steel.
A wide variety of operating fluids can be used to perfectly match all process requirements.
Even demanding applications such as evacuating saturated gases and vapors are possible without problems. Their operating fluid is usually water, but other liquids may be used if required by the process conditions.
Their new sealing concept with optimized Viton or FFKM seals makes them suitable for most applications.
Universal flanges allow for simple fitting or replacement of existing vacuum pumps. The precisely dimensioned range of sizes and the choice of accessories and construction materials allows you to find the perfect DOLPHIN LM/LT for your process.
DOLPHIN LM are single-stage vacuum pumps whereas DOLPHIN LT have two stages for a higher vacuum. More than ten sizes allow an exact match to every process.
Of course, they comply with the API-681 standard and are ATEX-certified.
Their oval-shaped housing, together with operating liquid management via cylindrical type distributor, ensures reliable operation. Being not sensitive to thermal expansion, there is no risk of rotor seizing. Even an unlikely axial shift of the impeller is tolerated.
The modular two-stage design allows for quick replacement of bearings and mechanical seals. No clearance readjustment is necessary at reassembly.
DOLPHIN LN can be cleaned very easily. You just use hot steam while the impeller rotates in the empty compression chamber.
With the innovative easy start function, you can simply turn on the compressor under full discharge pressure. It then builds up performance within ten seconds. There is no need for special shut-down or starting procedure.
Thanks to the robust liquid ring principle, even the extraction of particle-laden gases or highly saturated vapors can easily be carried out.
DOLPHIN LX are available in different construction materials and ATEX versions.
Different operating fluids may be used according to process conditions.
The VL series has been designed to support a wide range of processes in many industrial sectors. Such as plastics, food and beverage, chemical and pharmaceutical industries.
DOLPHIN VL units are available with either single- (DOLPHIN LM) or two-stage (DOLPHIN LT) vacuum pumps. More than ten sizes allow an exact match to every process.
If required by the process conditions, other operating fluids than water may be used. DOLPHIN VL are available as a simple continuous flow system, or as a partial or total recirculation system.