CLH Vertical seawater centrifugal pump

Vertical, shaft-coupled centrifugal pump engineered for continuous seawater service. The CLH series is built with bronze wetted components for corrosion resistance in marine environments and is designed for duties including ballast transfer, bilge pumping, coolant circulation, drainage and fire-fighting on ships and naval vessels.

Key features

• Vertical, shaft-coupled centrifugal design for compact footprint and simple alignment
• Bronze construction for impeller and casing where seawater contact occurs
• Suitable for seawater desalting feed, tank trimming and general sea-service duties
• Also applicable as a booster or circulating pump in petrochemical lines, cold/hot water systems and high-rise potable water supply

Typical applications

• Marine: ballast pumps, bilge pumps, cooling water and fire pumps on ships and warships
• Desalination: feed pump for seawater desalting units
• Industrial & building services: booster pumps for pipelines, circulation in HVAC systems and high-rise water supply

Model notation (as supplied)

• CLH25-25-6.5
  • CLH — Marine vertical seawater pump series
  • First “25” — inlet diameter 25 mm
  • Second “25” — outlet diameter 25 mm
  • “6.5” — model speed identifier (as supplied by manufacturer)

What to confirm when enquiring

• Required flow (m3/h) and head (m)
• Motor power and speed (kW / rpm) or driver preference
• Mechanical seal or packing type and flushing requirements
• Exact materials specification for wetted parts (bronze grade) and shaft
• Connection dimensions and mounting/installation constraints
• Certifications required for marine or fire service (classification society approvals)

For accurate selection and quotation, provide duty point (flow/head), operating temperature, fluid details (salinity, solids), and preferred driver specifications. A detailed datasheet or performance curve should be requested for final sizing and compatibility checks.