Material degradation or failure caused by fatigue, corrosion, wear and cavitation will lead to higher operating and maintenance costs for the axial poolitatud juhtum pumps. In most cases, these problems can be avoided by choosing the right materials.

The following four points are the criteria for selecting materials foraxial split case pumpsat high flow rates:

1. Due to the high flow rate in the pump, fatigue strength (usually in a corrosive environment) is closely related to pressure arteries, dynamic and static interference and alternating stresses.

2. Corrosion caused by high flow rates, especially erosion.

3. Kavitatsioon

4. Wear caused by solid particles entrained in the fluid.

Wear and cavitation are the main mechanical wear mechanisms, which are sometimes intensified by corrosion. Corrosion is a combination of chemical reactions between metals, pumping media, oxygen and chemical components. This reaction is always present, even if it is not detected. In addition, the impeller tip speed is limited by hydraulic, vibration and noise requirements.

The metal materials commonly used in the axial split case pumps are as follows:

Cast iron - weak wear resistance

Carbon steel - used in water without oxygen and corrosives

Low alloy steel - not susceptible to uniform corrosion

Martensitic steel - suitable for clean water or softened water

Austenitic steel - good resistance to uniform corrosion and erosion

Duplex steel - can resist high corrosion

Users should choose the appropriate material for the axial split case pump according to actual needs to extend the service life of the pump as much as possible.