China Cast Iron Air-Operated Double Diaphragm Pump Manufacturer, Supplier, Factory

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.

Shanghai Crowns Pump Manufacturing Co., Ltd. specializes in meticulously creating efficient and high-quality pump solutions for a wide range of industries，especially in the multistage pump. We specialize in the production of multistage pumps, offering an integrated production line that covers casting, manufacturing, processing, and inspection. It offers outstanding reliability and performance in various scenarios, including industrial processing, urban water supply systems, and agricultural irrigation projects. Engineered with versatility in mind, these multistage pumps are well - equipped to handle non - corrosive and slightly corrosive liquids with ease.

Shanghai Crowns Pump Manufacturing Co., Ltd. excels in designing, producing, and selling various water pumps. Our ZW Self Priming Sewage Pump meets ISO standards, ensuring high performance and reliability. ZW series pump are horizontal single stage single suction self priming centrifugal pumps.

Having spent decades in the pump manufacturing industry, I’ve seen firsthand how critical it is to have fire protection systems that never falter when lives and property are on the line. That’s why Shanghai Crowns’ Split Case Fire Pumps are designed with one goal in mind: uncompromising performance when it matters most. These pumps are built around a robust split-case design specifically tailored for firefighting. For industrial complexes, commercial high-rises, and municipal fire departments, these pumps are the backbone of reliable fire suppression. In a recent skyscraper project, three parallel pumps achieved full pressure within 18 seconds during a certification test, meeting GB50974-2014 standards with ease. The combination of cast iron casing and stainless steel shafts means they’ll maintain 95% of their performance even after a decade in harsh coastal environments. At the end of the day, fire protection isn’t about specs on paper—it’s about trust. Our Split Case Fire Pumps earn that trust through decades of refining every detail, ensuring they’re ready to defend what matters most, when it matters most.

Shanghai Crowns Pump Manufacturing Co., Ltd. delivers a reliable Fire Pump System featuring two jockey pumps, designed to maintain stable water pressure during fire emergencies. This efficient setup includes a pressure tank and control panel, ensuring optimal performance without main pump activation—critical for early-stage fire response. The dual-jockey design offers redundancy, auto-switching between pumps to sustain pressure and minimize maintenance downtime. Ideal for high-rises, industrial sites, and public buildings, it meets safety standards with quiet operation (≤75 dB) and space-saving integration. Trust our solution for proactive fire readiness, combining durability and smart control to safeguard assets and ensure compliance in emergency scenarios.

Shanghai Crowns Pump Manufacturing Co., Ltd. excels in designing, producing, and selling various water pumps. Our Horizontal Single-Stage Centrifugal Pump ZS meets ISO standards, ensuring high performance and reliability. ZS stainless steel horizontal single-stage centrifugal pump is made of advanced technology such as stainless steel plate stamping and expansion welding. It is the first generation of centrifugal pump in China, which can replace traditional IS pump and general corrosion-resistant pump. It has the characteristics of beautiful appearance, light structure, high efficiency, energy saving, durability, light corrosion resistance and low noise.