axiaal gespleten geval pumps are widely used in large-scale water transfer, industrial processes, and municipal applications due to their ability to handle high flow rates with excellent efficiency. However, at these elevated flow conditions, material degradation caused by corrosion, fatigue, cavitation, and erosion becomes a critical concern. Choosing the right construction materials for an axial split case pump is essential to minimize downtime, reduce maintenance costs, and extend equipment life. This guide outlines the key factors to consider when selecting materials for axial split case pumps operating under high flow rate conditions.

Key Considerations When Selecting Materials for High Flow  Axial Split Case Pumps:

1. Fatigue Strength Under Dynamic Conditions

High flow environments generate considerable alternating stresses within the pump components. Fatigue failure—especially in corrosive environments—can result from pressure pulsations, mechanical vibrations, and fluid-induced instabilities. Material selection must prioritize high fatigue strength and structural integrity to withstand continuous dynamic loading over long operating cycles.

2. Corrosion and Erosion Resistance

At high velocities, fluids can become highly erosive, especially if they contain dissolved gases or aggressive chemical compounds. Corrosive degradation is often accelerated by turbulence and impingement near surfaces such as impellers, casings, and wear rings. It is essential to select materials with proven resistance to both general and localized corrosion.

3. Cavitation Resistance

Cavitation is a common issue in axial split case pumps, especially near the impeller blades. When vapor bubbles collapse, they generate intense shock waves that can pit and erode the metal surface. Materials with strong mechanical properties and resilient microstructures—such as duplex stainless steels—offer improved resistance to cavitation damage.

4. Wear Resistance Due to Solids in the Fluid

Solids entrained in the pumped fluid can cause abrasive wear on internal surfaces. This is particularly damaging in high flow systems where particle velocity and impact frequency are elevated. Material hardness and microstructural toughness play key roles in minimizing wear in these scenarios.

Common Materials Used in Axial Split Case Pumps:

Gietijzer:Economical but limited wear and corrosion resistance. Best for clean, non-aggressive fluids.

Koolstofstaal:Suitable for oxygen-free and non-corrosive water systems.

Laaggelegeerd staal:Offers better corrosion resistance than carbon steel and is less prone to uniform corrosion.

Martensitisch roestvrij staal:Hard and durable, ideal for clean or treated water applications.

Austenitisch roestvrij staal:Provides good resistance to uniform corrosion and flow-induced erosion.

Duplexroestvrij staal:Combines high strength with excellent corrosion and cavitation resistance, making it ideal for demanding high-flow conditions.

Conclusie:

Selecting the appropriate materials for an axial split case pump operating at high flow rates is critical to maintaining long-term performance and minimizing lifecycle costs. By considering factors such as fatigue strength, erosion, cavitation, and particle-induced wear, users can match the right material to their application. Materials like duplex stainless steel and austenitic alloys are especially valuable in harsh or variable conditions. Choosing wisely not only enhances pump reliability but also ensures efficient, trouble-free operation over time.