Construction Industry and Industry

HÜDIG Electrical Vacuum Pump Units convince through perfected technology and have been proven thousandfold all over the world. The units are designed in the minutest detail and according to a modular system. Beside a high operation safety and very good performance characteristics a low maintenance is required by the construction practice. The results of these demands are our new series HC 467 resp. HC 468 as well as HC 487 resp. HC 488.

The professionals know the function of this aggregate of the almost legendary HÜDIG vacuum aggregates of the series HC 550. Concerning the performance parameters the HC aggregate 522 is for conveying of smaller quantities of groundwater. Compared with classical displacement pumps, as piston or diaphragm pumps, this aggregate is insensitive to convey sandy groundwater. Through the use of an additional vacuum generator a reliable conveying is taking place also when having larger air volume. Based on the use of vacuum dewatering there often exist high air volumes due to air pockets. Additionally the vacuum generator produces in total a higher vacuum compared to piston pumps. Based on this the ground water could be pumped from deeper horizons.

In the application for dewatering the piston pump was used for many years as a reliable pump unit. In the 70th of the last century, the piston pump was increasingly replaced by modern vacuum units. Demanded greater efficiency in capacity was essentially the reason for this. The vacuum of piston pumps is in practice limited to a suction lift of 7 m water column and also the real flow rate does not exceed the 70 m³ / h per unit (air performance, water performance or a mixture of both). Of course, several units can increase the total capacity, but this is associated with a higher use of equipment and therefore more costly. Demands are made to the quality of conveyed groundwater. Sandy water leads to premature erosion and can cause premature failure of the unit and therewith unforeseeable consequential damages. Nevertheless, there are niches for the application of piston pumps. These could be found, for example in the so-called line construction site (pipeline construction).

The HC 271 is designed for heavy duty use on construction sites. An outer galvanized steel frame with integrated pan provides a very good protection against mechanical damage from outside and also a spilling protection of liquids. The aggregates are stackable and the solid supporting construction provides secure acceptance of the load hook. The engine with the large oil pan in combination with the properly sized fuel tank enables a 24/7 operation at full load. The piston pump has an automatic lubrication. Long service life can be achieved by over-sized bearings and low piston speed. The piston pump has a built in air chamber. Due to this pressure compensation the hoses will be prevented from damage during long distance, for example. The pulsation of the hoses is practically suppressed.