The overall cost – related to service life – is an important factor in the detail layout of the optimal pump. The HIDROSTAL bearing frame, whose construction is designed for the heaviest loading, and thereby the minimum shaft deflection, decisively extends the service life of the pump.

Monitoring elements for seal leakage, bearing temperature and any oscillation that may take place can be built in as options.

The practically clearance-free precision bearing frame has minimum shaft deflection and large-area seal surroundings. These are optimal conditions for the shaft seals.

The diagram shows values of the shaft deflection DR as a function of the radial hydraulic force FR of a conventional bearing frame compared with a HIDROSTAL precision bearing frame, in which the bearing play and the other equipment parts are compensated.

HIDROSTAL Hydraulic Systems

Works on the principle of the centrifugal pump. They have multiple vanes and high flow rates. As a result, they have limited negative suction head, and are unsuitable for solid  suspensions. The single vane guides the solids towards the impeller axis, and from there to the single flow channel without the possibility of blocking. The shape of the inlet edge creates an "inducer effect", which makes a large negative suction head possible. A pronounced screw shape creates a displacement effect with high viscosities, which makes possible the handling of viscous liquids well into the displacement pump application range.

Our research work has produced screw shapes that permit high rotary speeds, which results in considerable energy savings in applications involving small quantities and large heights.

A = Operation point
B = better efficiency
C = large pressure reserve

--- large Impeller, low rpm.
__ small Impeller, high rpm.

For each application area, special impeller shapes and the corresponding metallurgy have been developed. As a result, a high service life with the lowest possible costs is guaranteed.

With abrasive media, an suction cone from wear resistant material, which can be adjusted externally, is used. In this model, the wearing parts can be readjusted externally without having to dismantle the pump.

For extremely corrosive and abrasive media, HIDROSTAL special alloys are used.

Pump with swivelled drive unit

This construction, with a baseplate for rapid dismantling, enables simple checking in cases of overlarge solids, difficult to handle media behaviour or where excessive abrasion or corrosion can be expected.