DESCRIPTION / OPERATION
The ENVIROPUMP water lifting screws, or called screw pumps, are designed according to the Archimede principle. This principle consists of making 1 to 3 threads around a central rotor, which in an inclined position, and in a suitable rotational movement, ensures the rise of the water to a higher level.
This technology is insensitive to variations in flow rates and waste, that the effluent may contain. Under certain extreme conditions, however, a protective grid may be added. To facilitate its implementation, it is recommended to add of a metal trough.
This is the oldest water lifting technology, and its lifespan remains unmatched compared to any other system. Even in the case of operation without water (test, maintenance, negligence or to clear a control by level probes), there is no risk of deterioration of the equipment. On the other hand the power consumption is less than with a classical pump.
The diameter and the thickness of the central tube are calculated in function of the number of spirals and their external diameters. The length and the inclination of the lifting screw, are additional parameters for the design.
The diameter, pitch, and number of screws are calculated according to the desired flow and height of lift, taking into account the geometry of installation. The screw absorb the flow which arrives at the foot to maintain it to the upper part. This is within the limit of the capacity for which it has been dimensioned. It is a so-called volumetric pump.
The trough of the lifting screw is traditionally made of concrete by the civil engineer. This is a rather delicate operation. For this reason, we offer metal troughs that are particularly well suited and which ensure the perfect alignment of the screw with respect to its trough. Implementation is therefore much simplified.
The power of the drive unit is calculated in relation to the geometrical characteristics of the lifting screw and its maximum flow. It is an essential component that must be perfectly aligned with the screw axis.