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Type CDB Vertical Double-Suction Centrifugal Pump | Ishii Machinery Works

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High-Volume Pumping Performance with a Compact Footprint

The Type CDB Vertical Double-Suction Centrifugal Pump from Ishii Machinery Works is designed for industrial and marine applications where high flow capacity, reliable performance, and vertical space optimization are critical. This precision-engineered Japanese pump is widely used in cooling systems, ballast water transfer, and emergency fire water services.

With its double-suction impeller design and vertical layout, the Type CDB delivers consistent, high-volume flow while minimizing floor space requirements. It is an excellent choice for shipboard machinery rooms and plant utility systems.


Vertical centrifugal pump on blue background with text: "Type CDB (Vertical, Double Suction, Centrifugal Pump)". Logo: ISHII Pumps.
Type CDB Vertical Double-Suction Centrifugal Pump by Ishii Machinery Works, designed for efficient fluid handling in marine utility rooms.

📌 Applications

Application Type

Cooling Fresh Water Pump

Cooling Sea Water Pump

Ballast Pump

Emergency Fire Pump

📐 Specifications

Parameter

Value

Nominal Diameter

ϕ300, ϕ350, ϕ400, ϕ450, ϕ500, ϕ550 mm

Capacity

500 – 3,200 m³/h

Total Head

8 – 40 m

Key Features of the Type CDB Vertical Double-Suction Centrifugal Pump

  • Flow Capacity: 500 to 3,200 m³/h

  • Total Head: 8 to 40 meters

  • Nominal Diameters Available: ϕ300 / ϕ350 / ϕ400 / ϕ450 / ϕ500 / ϕ550 mm

  • Compact Vertical Configuration: Ideal for space-limited installations

  • Double-Suction Impeller: Reduces axial thrust and improves hydraulic balance

  • Optimized for F.W. and S.W. Services: Suitable for fresh and sea water cooling, ballast, and fire systems

Why Choose a Vertical Double-Suction Centrifugal Pump?

Stable Flow at High Capacity

Double-suction impellers enable symmetrical fluid intake, minimizing turbulence and ensuring stable hydraulics for high-volume operations. This makes the Type CDB Vertical Double-Suction Centrifugal Pump ideal for systems that demand continuous, reliable flow.

Space-Saving Vertical Design

The vertical configuration allows the pump to occupy less floor space and integrate more easily into tight machinery spaces or compact system layouts.

Proven Across Multiple Applications

The Type CDB Vertical Double-Suction Centrifugal Pump is trusted across a variety of marine and industrial use cases, including:

  • Cooling fresh water and sea water loops

  • Ballast water transfer

  • Emergency fire water systems (subject to classification standards)

Selection and Customization Guidance

To ensure optimal performance and compatibility with your system, consider the following when specifying a Type CDB Vertical Double-Suction Centrifugal Pump:

  • Define the duty point: Flow rate (m³/h) and head (m)

  • Select appropriate nozzle size: ϕ300 to ϕ550 mm

  • Identify fluid type: Fresh or sea water, along with temperature and potential solids content

  • Specify material and seal requirements: Based on corrosion resistance and operating conditions

  • Determine motor requirements: Voltage, frequency, efficiency class, and protection rating

  • Confirm certification and documentation: As per class society and project requirements

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