Cast Iron Air-Operated Diaphragm Pump

The Cast Iron Air-Operated Double Diaphragm (AODD) Pump is a workhorse built for rugged environments. Its robust cast iron construction isn’t just durable—it’s practically indestructible against abrasive slurries, high-viscosity grouts, and gritty sludge. I’ve seen it thrive in mining operations, moving ore-laden slurries that would grind other pumps to a halt. The double diaphragm design ensures pulseless flow, even with sticky materials like concrete or wastewater sludge, preventing clogs and wear. In construction and wastewater treatment, reliability is key. This pump delivers—no frequent maintenance, no downtime. Its heavy-duty build shrugs off the daily grind of tough materials, making it a go-to for industries where “good enough” isn’t an option. Whether you’re tackling ore processing, grout mixing, or effluent management, this pump handles the mess with consistency. No frills, just brute force and dependability.

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Product Description

Designed and manufactured by Shanghai Crowns Pump Manufacturing Co., Ltd., the Cast Iron Air-Operated Double Diaphragm Pump (AODD) is engineered to excel in harsh industrial environments, delivering unmatched durability and reliability for mining, construction, chemical processing, and beyond.

Key Technical Advantages

1.High-Strength Cast Iron Construction

Crafted from premium-grade cast iron, the pump body offers exceptional resistance to abrasion and impact, capable of withstanding long-term erosion from high-solid-content media like mineral slurries and construction sludge. Independent testing demonstrates its service life is over 5 times longer than standard alloy pumps when handling 30% quartz sand-laden slurries.

2. Dual-Diaphragm Pulse-Free Design

The innovative dual-diaphragm mechanism ensures smooth, pulsation-free fluid transfer, preserving the integrity of shear-sensitive materials. In applications involving high-viscosity grout for construction projects, flow stability remains within ±2% variance, ensuring precise operational control.

3. Pneumatic Explosion-Proof Safety

Operating solely on compressed air, the pump eliminates electrical hazards

Robust Operational Capabilities

Temperature Range: Functions reliably from -20°C to 80°C, accommodating high-temperature chemical media (e.g., 75°C sulfuric acid) and low-temperature mining slurries.
Pressure Performance: Handles up to 7 bar operating pressure, enabling high-lift (60m) applications. In mining tailings transport, a single pump supports complex pipelines spanning 300m horizontally and 50m vertically.
Media Compatibility: Suitable for extreme pH (0-14) corrosive fluids, 25mm-solid-laden mixtures, and ultra-viscous materials (up to 80,000 cP), such as heavy oils and industrial sludges.

Industry Applications

Mining Sector: Efficiently transfers mineral slurries and tailings (up to 40% solids content). A copper mine case study shows a 60% reduction in annual maintenance costs.
Construction Industry: Specializes in conveying concrete, grout, and shield mud. During metro tunnel projects, it achieves daily throughput of 2,000+ cubic meters, enhancing operational efficiency by 35%.
Wastewater Treatment: Manages high-solids wastewater and sludge (15% total solids), reducing pump replacement frequency from 4 times annually to just once in municipal applications.