I. Product Overview

The QBK series cast iron pneumatic diaphragm pump is professional fluid transfer equipment manufactured from high-strength cast iron, specifically designed for heavy-duty industrial applications. Constructed from premium HT250 cast iron, this series offers exceptional mechanical strength and wear resistance, making it suitable for conveying a wide range of industrial media, including special fluids such as those containing particulates or possessing high viscosity. Widely used in sectors such as mining, metallurgy, petroleum, chemicals, and wastewater treatment, it serves as a reliable fluid transfer solution for harsh operating environments.

II. Key Features and Benefits

High-strength cast iron construction for exceptional durability

Pump body made of HT250 high-strength cast iron, offering superior mechanical properties

Critical components undergo specialized heat treatment, enhancing wear resistance by 30%

Compact design with high impact resistance, ideal for heavy-duty operations

Service life is 2–3 times that of standard pump models

Pneumatic drive design for safety and reliability

Compressed air-driven; requires no electricity and generates no electrical sparks

Compliant with ATEX explosion-proof standards; suitable for flammable and explosive hazardous areas

Motor-free design eliminates electromagnetic interference, ensuring more stable operation

Safe for use in harsh environments involving flammability, explosiveness, or high temperatures

Excellent media adaptability

Capable of conveying media containing solid particles (maximum particle diameter ≤ 10mm)

Handles high-viscosity liquids (up to 10,000 cP)

Strong self-priming capability (up to 7 meters); withstands dry running without damage

Suitable for conveying complex media such as slurries and fluids containing fibers

Leak-free structural design

Utilizes pneumatic diaphragm technology to ensure a completely sealed, leak-free operation

Dual-diaphragm design completely isolates the pumped medium from the compressed air supply Sealless design eliminates mechanical seals, reducing potential leak points and maintenance requirements.

Ideally suited for transporting toxic, hazardous, or high-value media.

Simple operation and maintenance.

Modular design allows for quick replacement of wear parts.

Routine maintenance can be performed using simple tools.

Low operating noise ensures a more comfortable working environment.

Flow rate can be infinitely adjusted by regulating the air supply pressure.

III. Performance Parameters

Flow rate range: 0–32 m³/h

Maximum head: 70 m

Operating pressure: 0.2–0.8 MPa

Inlet/Outlet diameter: DN15–DN100

Temperature range: -20°C to +120°C

Air consumption: 0.6–1.2 m³/min

IV. Typical Application Scenarios

Mining industry: Slurry transport, tailings handling, mineral processing

Metallurgical industry: Electrolyte transport, pickling solution circulation, metal processing

Petrochemical industry: Crude oil transport, chemical media circulation, acid/alkali handling

Wastewater treatment: Sludge transport, sediment handling, wastewater circulation

Construction industry: Cement slurry transport, coating circulation, construction wastewater treatment

V. Product Advantages Summary

✅ Rugged and durable: Made of high-strength cast iron for a long service life
✅ Safe and reliable: Pneumatically driven with excellent explosion-proof performance
✅ Strong media adaptability: Capable of handling special media, including those with particles or high viscosity
✅ Leak-free design: Fully sealed structure prevents media leakage
✅ Easy maintenance: Modular design ensures low maintenance costs

With its rugged cast iron construction, safe and reliable pneumatic drive, and excellent media adaptability, the QBK cast iron pneumatic diaphragm pump is an ideal choice for heavy-duty industrial applications. Its high-strength cast iron build ensures stable, long-term operation in harsh environments. Combined with ease of maintenance and operational flexibility, it serves as a professional solution for handling complex media in industries such as mining, metallurgy, and petrochemicals.