Slurry Pump Selection

Core Principles of Working Condition Adaptation

Incorrect selection is the primary cause of low efficiency and short service life—accurate matching hinges on three core dimensions: medium characteristics, parameter calculation, and working condition adaptation.

1. Medium Characteristics Priority

• Concentration: ≤40% volume concentration; for >40%, choose AH/ZGB series heavy-duty pumps with reduced speed (≤600rpm).

• Particles: Closed impellers for <5mm particles; open/semi-open impellers for >5mm particles or fibrous impurities (install crushers/filters if needed).

• Corrosiveness: Rubber lining/duplex steel for acidic/alkaline media; Cr30A high-chromium alloy or tungsten carbide coating for high-hardness particles (e.g., quartz).

2. Accurate Parameter Calculation

• Flow rate (Q): Production line demand +10% margin to avoid overload (thin slurry) or inefficiency (thick slurry).

• Head (H): Calculate pipeline resistance, lifting height, and system pressure to ensure operation in the high-efficiency zone (≥70% efficiency).

• Shaft power: Corrected by slurry density: N=γQH/(102η) (γ=slurry specific weight, η=pump efficiency).

3. Working Condition Adaptation

• High pressure (H>100m): Multi-stage slurry pumps or step-by-step boosting, equipped with mechanical seals + independent cooling systems.

• Large flow & low head: Vertical slurry pumps (small footprint, easy maintenance) for sump/tank applications.

• Cavitation-prone conditions: Optimize impeller inlets to reduce NPSHr; add a front inducer if necessary.