Hot Water Circulation Centrifugal Pump End Suction Cantilever

Single- or two-stage cantilever centrifugal pump engineered for high-temperature hot-water circulation in industrial systems. The R-type end-suction design is a single-suction, cantilever centrifugal pump (available as single-stage or two-stage single-suction) for continuous circulation of clean hot water (no solid particles) and is commonly used in metallurgy, power plants, plastics and rubber processing, textile, chemical, wood and paper industries, and heating systems.

Key features

• Temperature and pressure capability: suitable for media up to 250 °C (material-dependent).
• Flow path and orientation: axial horizontal inlet with vertically upward discharge.
• Drive and rotation: direct motor drive through an elastic coupling; rotates clockwise when viewed from the drive end.
• Impeller: statically balanced; secured to the shaft with impeller nuts and shaft sleeves.
• Shaft support: suspension frame with a pair of single-row radial thrust ball bearings plus a single-row radial ball bearing (or an alternative single-row radial cylindrical roller bearing). Axial thrust is carried by the thrust bearing; some impeller designs use back blades for axial thrust balance.
• Sealing options: floating sealing ring or high-temperature, high-pressure mechanical seal. Floating ring and suspension frame feature cooling chambers; recommended external cooling water flow 0.3–0.6 m3/h.

Materials and service limits

• Ductile iron flow components: non-corrosion service up to 150 °C, maximum working pressure ≤ 2.0 MPa.
• Cast steel flow components: non-corrosion service up to 207 °C, maximum working pressure ≤ 4.0 MPa.
• Cast stainless steel flow components: corrosion-resistant service up to 250 °C, maximum working pressure ≤ 5.0 MPa.

Design benefits for industrial users

• Robust cantilever construction eliminates the need for shaft seals in the pumped liquid column, simplifying maintenance.
• Multiple material options let you match pump metallurgy to temperature, pressure and corrosion requirements.
• Cooling chamber provisions for bearings and sealing increase reliability in high-temperature service.
• Straightforward motor coupling and standard bearing arrangement support common industrial drive configurations and maintenance practices.

Typical applications

• Hot-water circulation for industrial heating systems and boilers
• Circulation and transfer in power plants, metallurgy and heat-transfer loops
• Process hot-water recirculation in plastics, rubber, textile, chemical, and pulp & paper operations

Notes for specification and ordering

• Confirm required stage (single-stage vs two-stage), material of wetted parts (ductile iron, cast steel, or cast stainless steel), sealing type (floating ring or mechanical seal), and any special bearing or impeller options.
• Provide operating temperature, design pressure, required flow and head, motor speed and service conditions so the correct model and material class can be selected.