Centrifugal Pump

A centrifugal pump uses a rotating impeller to generate centrifugal force, driving fluid from the center to the impeller edge and into the volute casing where kinetic energy is converted to pressure. This is the most common pump type for clean or lightly solids-laden fluids, delivering high flow rates at moderate-to-high heads — suitable for water supply, HVAC, wastewater treatment, and fire fighting.

Key components include the impeller, pump shaft, volute casing (scroll casing), mechanical seal (or packing gland), bearings, and suction/discharge ports. Horizontal and vertical configurations differ in shaft orientation and mounting arrangement; multistage pumps stack multiple impellers in series to increase head.

The impeller is the rotating element that generates centrifugal force to drive the fluid. Three common types: closed impeller (high efficiency for clean water), open/semi-open impeller (for fluids with suspended solids), and vortex impeller (for wastewater with heavy solids content). Impeller type and material are selected based on the fluid characteristics and efficiency requirements.

Centrifugal pumps are widely used for clean or lightly solids-laden fluids: domestic water supply, HVAC, wastewater treatment, industrial process water, pressure boosting, and fire fighting. For large solids or high-viscosity fluids, positive displacement pumps should be considered.

Two key coordinates define the duty point: flow rate Q (m³/h) and total head H (m, including static lift plus friction losses). Additional factors include available NPSH, casing material (cast iron / SS304 / SS316), impeller type, and compliance with EN 733 / ISO 2858. TKT engineers calculate the operating point at no charge.

Cast iron EN-GJL-250 suits clean water, domestic wastewater, and HVAC — low cost. SS304 offers moderate corrosion resistance, suitable for F&B applications without direct product contact. SS316 (with added molybdenum) resists Cl⁻ ion corrosion, marine environments, and mild chemicals. TKT provides material selection advice based on the specific fluid.

All products are genuine, with a 12-month warranty and 24/7 technical response. FAT/SAT testing support is available for large orders, along with technical documentation and spare parts from a 5,000+ part inventory.