Summary

This guide explores all the key aspects for selecting the most suitable pump for corrosive acids in various industrial contexts, with a special focus on magnetic drive centrifugal pumps offered by CDR Pompe. The article clearly explains how the magnetic coupling system eliminates fluid leakage, reduces maintenance, and ensures maximum safety, while also contributing to environmental sustainability.

It then analyzes material compatibility with the main acids used in production processes—citric, hydrofluoric, and hydrochloric acids—illustrating typical applications and the most suitable materials for each (PP, PVDF, and PFA). A dedicated section covers the properties of CDR’s construction materials and the advantages that distinguish magnetic drive pumps in terms of chemical resistance, efficiency, and long-term durability.

Finally, the guide presents the DTN, ETN, and UTN models, the three CDR series best suited for handling corrosive fluids, highlighting their specific industrial applications and technical features. The article concludes by emphasizing CDR Pompe’s commitment to quality, safety, and continuous customer support throughout the entire plant lifecycle.

Why Choose a Magnetic Drive Centrifugal Pump

When it comes to a pump for corrosive acids, the priority is to ensure safety, reliability, and resistance to the most aggressive fluids. Acids used in industrial processes, such as citric, hydrofluoric, or hydrochloric acid, can compromise the structure of an unsuitable pump in seconds, requiring pumping solutions that eliminate any risk of leakage or environmental contamination.

Magnetic drive centrifugal pumps are today’s most effective answer to these needs, combining high performance with completely sealed operation, without mechanical seals that could wear out.

At CDR Pompe these solutions are complemented by extensive technical consulting and on-site support with a catalog of magnetic drive models designed to adapt to a wide variety of applications and work environments.

Advantages of Magnetic Drive Technology

Magnetic drive pumps are currently the most technologically advanced solutions for handling toxic and corrosive fluids. Unlike their mechanically sealed counterparts, they feature a hermetic design: instead of a transmission shaft passing through the pump casing, motion is transferred via a pair of permanent magnets—one connected to the motor and the other to the impeller. This design prevents leaks even under severe operating conditions, ensuring maximum safety for both operators and plants.

The absence of mechanical seals also reduces maintenance needs and avoids contact between metal components and acids, ensuring consistent performance even at high temperatures and pressures.

CDR Pompe’s focus on preventing the release of aggressive or toxic substances into the environment aligns with our commitment to sustainability, demonstrated daily through projects such as installing a 100 kW photovoltaic system and obtaining EcoVadis certification, both concrete evidence of responsible production aimed at protecting the planet and promoting a circular economy.

Materials for CDR Pumps for Corrosive Acids

Material selection is crucial in designing and installing a pump for corrosive acids. Each industrial application has unique specifications—such as temperature, concentration, pressure, and cycle duration—that directly affect the resistance of the pump casing and wetted parts.

CDR Pompe offers a complete range of high-performance materials, selected based on decades of experience handling aggressive substances in industrial, chemical, and pharmaceutical environments:

• PP (Polypropylene): Lightweight and durable, ideal for weak acids or low temperatures. Excellent balance between cost and lifespan.
• PVDF (Polyvinylidene Fluoride): Outstanding chemical and thermal resistance; perfect for moderately aggressive acids and higher-temperature processes.
• PFA (Perfluoroalkoxy): The benchmark material for extreme conditions. Provides maximum chemical resistance and dimensional stability even with highly concentrated acids or elevated temperatures.

Thanks to this variety, CDR can supply the pump for corrosive acids best suited to any production context, ensuring efficiency, safety, and long-term durability.

Acid Compatibility and Applications

Citric Acid: Used in food, pharmaceutical, and cosmetic industries for its chelating and acidifying properties; compatible with PP and PVDF.
Hydrofluoric Acid: Employed in glass processing, semiconductor manufacturing, and metal surface cleaning; requires highly resistant materials such as PFA and PVDF.
Hydrochloric Acid: Common in many industrial sectors, from basic chemicals to water treatment and electroplating; can be safely handled with PP, PVDF, or PFA, depending on concentration and temperature.

Perfect compatibility between fluid and material ensures CDR pumps deliver long operational life and consistent performance even under extreme conditions.

Key Benefits of CDR Magnetic Drive Pumps

• Zero fluid leakage: No mechanical seals means no risk of leaks, protecting operators and the environment.
• Superior chemical and thermal resistance: Materials withstand concentrated acids and high temperatures over time.
• Reduced maintenance: Simple, modular design allows quick, less frequent interventions, lowering operating costs.
• Efficiency and durability: Precision engineering ensures reliable, continuous operation—even in extended cycles.
• Wide range of models and configurations: CDR pumps cover a broad spectrum of flow rates and heads, adapting to any industrial need.

Recommended CDR Models for Corrosive Acids

Within the CDR catalog, three models represent excellence in acid handling: DTN, ETN, and UTN.

• DTN Series: Available in the DTN ISO and DTN ASME versions, these pumps deliver extremely high hydraulic performance thanks to their specific shaft and impeller configuration, improving flow rate, head, and energy efficiency. The introduction of the dynamic shaft version increases reliability and ensures optimal axial thrust across the entire operating curve. Designed for the chemical and pharmaceutical sectors, the DTN range is used in basic and fine chemicals, petrochemical processes, API production, and air treatment in industrial plants.
• ETN Series: Known for robustness and ability to handle highly aggressive fluids. Designed for high performance under tough conditions, widely used in electroplating, fine chemicals, and pharmaceuticals. Plastic and fluoroplastic lining allows operation up to +120°C, with a maximum head of 35 m and flow rate of 60 m³/h.
• UTN Series: The most advanced solution for extremely corrosive acids. Available in base-mounted (UTN-L) and close-coupled (UTN-BL) versions, ensuring chemical resistance and maximum safety even in severe processes like semiconductor production or metal surface treatment. Ideal for environments where “zero emission” safety is a priority. Capable of operating up to +130°C, recommended for 24/7 applications.

Each model is supported by qualified technical service for selection, installation, and maintenance, confirming CDR Pompe’s commitment to reliable, efficient, and sustainable solutions for every industrial need.

Efficiency and Sustainability in Acid Management

Choosing CDR Pompe for your corrosive acid pump means partnering with a company that combines technology, experience, continuous innovation, and environmental responsibility. Magnetic drive solutions ensure safer processes, reduce leakage risks, and support a more sustainable future for the chemical industry.

With high-performance materials, designs engineered for maximum reliability, and technical service always at your side, CDR is the benchmark for those seeking quality and safety in handling corrosive acids.

Choose CDR Pompe: the safe choice for managing and transferring any critical fluid.