Marine DNW Horizontal Condensate Centrifugal Pump

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The DNW series marine horizontal condensate pump is a high-efficiency pump specially designed for marine power systems and offshore engineering equipment. It is widely used in marine boiler condensate systems, air conditioning (HVAC) cooling systems, steam recovery systems, and other applications. It is primarily intended for conveying low-temperature, low-pressure, and non-corrosive condensate water.

  • Boiler Condensate Recovery: As one of the key auxiliary components in marine boiler systems, the DNW pump efficiently recovers and recirculates condensate, improving overall thermal efficiency and reducing energy consumption.
  • Air Conditioning Condensate Drainage: In marine HVAC systems, it is used to transfer condensate water generated by the air conditioning units, ensuring system stability and preventing damage from accumulated water, such as corrosion or short circuits.
  • Strong Multi-System Compatibility: The pump is adaptable to a wide range of shipboard systems, including marine power plants, greywater treatment systems, and steam condensate recovery units, offering excellent system compatibility and scalability.
  • Continuous Duty Operation: Engineered for continuous use under demanding marine conditions, it is well-suited for long voyages, heavy-duty operations, and high-humidity environments where reliable performance is essential.
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Marine DNW Horizontal Condensate Centrifugal Pump for Sale

This pump features a horizontal single-stage centrifugal design, delivering reliable operation, high efficiency, low vibration, low noise, and easy maintenance. It is particularly suitable for shipboard installations where space is limited and vibration control is critical.

  • High-Efficiency Vacuum Adaptability: The DNW Series Marine Horizontal Condensate Pump is specifically engineered to perform reliably under high-vacuum operating conditions, making it ideal for marine condenser systems. It can operate steadily in environments with vacuum levels up to 93% (approximately 7 kPa absolute pressure), ensuring uninterrupted extraction of condensate even in low-pressure scenarios. The pump’s optimized impeller hydraulic design and sealing configuration effectively prevent cavitation and air locking, enabling continuous and efficient discharge of condensate from seawater desalination units and steam recovery systems. This greatly enhances operational safety and improves energy efficiency across the system.
  • Compact Horizontal Design: This series adopts a compact horizontal layout featuring axial suction and radial discharge, which minimizes piping complexity and saves valuable engine room space on vessels. The pump casing and key wetted components can be manufactured from high-strength cast iron or corrosion-resistant cast steel, depending on application needs. This structural flexibility ensures excellent mechanical durability while providing compatibility with various clean or mildly corrosive fluids such as seawater, desalinated water, and condensate. The design extends service life and reduces maintenance frequency, making it highly suitable for marine environments with restricted installation space and demanding reliability requirements.

Marine DNW Horizontal Condensate Pump Features

  1. Horizontal Single-Stage Centrifugal Design: Compact structure with a low center of gravity ensures stable mounting on ship hull structures. Excellent vibration resistance makes it well-suited for operation under harsh sea conditions.
  2. Axial Inlet and Radial Outlet Configuration: Optimized hydraulic passage design allows for smooth fluid flow, reduces hydraulic losses, and improves overall efficiency.
  3. High-Strength Shaft Sealing Structure: Available with mechanical seal or gland packing options to suit various operating conditions. Offers excellent sealing performance to effectively prevent condensate leakage.
  4. Corrosion-Resistant Material Options: The standard pump body is made of high-quality cast iron, with optional materials such as bronze or stainless steel available to meet the requirements of different water qualities and corrosive environments.
  5. Standardized Motor Drive: Equipped with high-efficiency marine motors compliant with IEC standards. Features smooth operation, easy maintenance, and compatibility with automated control systems.

Marine DNW Horizontal Condensate Centrifugal Pump Parameters

Model

Flow Rate(m3/h)

Hydraulic Head(m)

Rotational Speed(r/min)

Discharge Head(MPa)

‌Suction Head(MPa)

Condenser Vacuum

Power(kW)

DNW0.2

0.2

26.7

2900

0.18

0.006

93%

0.75

DNW1

1

26.5

2900

0.18

0.008

1.1

DNW2

2

26.5

2900

0.18

0.008

1.1

DNW3

3

26.5

2900

0.18

0.008

1.5

DNW4

4

26.5

2900

0.18

0.008

1.5

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Zava Marine Corporation is a leading supplier of marine parts and components. With a strong focus on quality and customer satisfaction, we specialize in providing a comprehensive range of high-quality marine equipment and accessories. Our products include deck equipment, ship accessories, and various other essential components needed for smooth maritime operations.

With a global presence, we serve a diverse customer base, including shipbuilders, shipowners, offshore operators, and marine equipment distributors. We are committed to providing exceptional service and tailored solutions to meet our customers’ unique needs.

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Zava Marine offers a comprehensive range of certifications for marine parts in accordance with international standards and regulations. These certifications include those provided by renowned marine classification societies such as Lloyd’s Register (LR), Bureau Veritas (BV), China Classification Society (CCS), Registro Italiano Navale (RINA), American Bureau of Shipping (ABS), Nippon Kaiji Kyokai (NK), and Det Norske Veritas – Germanischer Lloyd (DNV-GL). By collaborating with these esteemed societies, Zava Marine ensures that our certified marine parts meet the highest standards of safety, quality, and performance, instilling confidence in our reliability and compliance within the maritime industry.

The warranty provided by Zava Marine covers defects in materials and workmanship for a period of two years from the date of purchase. During this warranty period, if any marine parts purchased from Zava Marine exhibit issues or failures resulting from manufacturing defects or faulty materials, Zava Marine will take responsibility for repair or replacement of the affected parts. 

Zava Marine has recently opened new molds for European and North American clients, utilizing materials such as metal, ABS, PVC, and more. These successful mold opening projects allow us to provide customized marine parts and components that meet the specific requirements of our clients in these regions.

Typically, Zava Marine can ship samples within 7 days once the product drawing has been mutually confirmed by both parties. This efficient process ensures that customers can receive samples promptly, allowing them to assess the quality and suitability of the products.

Zava Marine frequently utilizes a wide range of materials in our projects. These materials include aluminum, stainless steel, carbon steel, copper, plastics, titanium, and PEEK (Polyether Ether Ketone). Each material offers unique properties and characteristics suitable for various marine applications. 

Yes, we provide customization services for marine parts. We understand that every project and application may have unique requirements, and we are committed to delivering tailored solutions. By collaborating closely with our clients, we can adapt our products to specific specifications, ensuring optimal fit, performance, and compatibility. Whether it’s modifying existing designs or creating entirely new parts, our customization services cater to the diverse needs of the maritime industry.

Absolutely! We offer product design and development services to support our clients’ needs. Our experienced team of engineers and designers can collaborate with clients from concept development to final product realization. By leveraging our expertise in marine engineering and design, we can provide valuable insights and innovative solutions. Whether it’s optimizing existing designs or creating entirely new products, we are equipped to assist clients in bringing their ideas to life efficiently and effectively.

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