QD Series Horizontal Multistage Centrifugal Pump | RFQ Sourcing Details

The QD series is a horizontal, multistage centrifugal pump range designed for high-head liquid transfer. The published model table covers flow ranges from 3.75–7.5 m³/h for the QD6-25 through 335–500 m³/h for the QD450-60.

Listed head ranges vary by model, extending from 15.78 m at the low end of the published ranges to 684 m at the high end. Listed motor power spans 4–1,050 kW, with model speeds of 680, 1,480, or 2,950 r/min.

Supported configuration information includes electric motor, diesel, or VFD drive options and mechanical, packing, or expeller shaft-seal options. Suction and discharge nozzles can be arranged in several directions. The number of pump stages and impeller diameter may be adjusted to meet different duty requirements.

Customization and OEM service are listed as available. The stated media capability includes water and other liquids similar to water. Additional configurations are described for hot water, oil, corrosive liquids, and wear-related media by changing materials, seals, or adding a cooling system.

Published medium limits include neutral mineral water containing no more than 1.5% solid particles with particle diameter below 0.5 mm and liquid temperature up to 80°C. A separate configuration is described for corrosive liquid without solid particles at -20°C to 150°C.

Oil or oil-product service is listed for fluids without solid particles, viscosity up to 120 ct, and temperatures from -20°C to 150°C.

Listed use areas include water supply and boosting, boiler-feed water, cooling and air-conditioning systems, water treatment and purification, municipal water and HVAC systems, irrigation, fire-fighting water service, industrial cleaning, mines, steel works, and chemical duties.

Suitability for any specific duty depends on the selected hydraulic model, wetted materials, sealing arrangement, drive, and operating conditions.

Procurement questions to confirm: Buyers should provide the required flow, total dynamic head, liquid composition, temperature, solids content, viscosity where applicable, operating schedule, installation conditions, power supply, preferred drive, shaft seal, and quantity.

Confirm the exact model and operating point against a performance curve.

Also verify wetted-part materials, corrosion and abrasion compatibility, suction conditions, nozzle orientation, motor enclosure and efficiency, outdoor protection, included accessories, inspection requirements, and the precise certification documents supplied with the ordered configuration.

The listed warranty is 12 months except for flow or wet-end parts;buyers should confirm its start date, exclusions, and remedy terms before ordering.