Leo 4SR16-20 / 5.5KW Submersible Borehole Pump Only » Buy online now for only R 7,287.62 incl. VAT

The LEO 4SR16-20 is a robust submersible borehole pump engineered for reliable water supply, irrigation, and air conditioning circulation systems. Built on decades of LEO's expertise in centrifugal pump technology, this single-impeller model delivers up to 220 m3/h with a head capacity of 85 meters, making it ideal for deep well installations and demanding industrial applications requiring consistent performance across clean water and compatible liquid transfers.

Constructed with a durable AISI304 stainless steel impeller and featuring an innovative rear-entry design, the 4SR16-20 allows complete access to the impeller, control valve, and motor without disconnecting the pump body from pipework-a practical advantage that reduces maintenance downtime significantly. Its closed-construction motor with IP54 protection and internal liquid lubrication system ensures reliable operation in temperatures ranging from -10 degC to 65 degC, while the mechanical seal complies with DIN 24960 standards, delivering the dependability expected in agricultural, municipal, and commercial water circulation projects.

Application

• Circulation and transfer of clean, chemically non-aggressive water and other liquids
• Water supply & irrigation
• Water circulation in air conditioning systems

Operating Conditions

• Delivery: up to 220 m3/h
• Head: up to 85 m
• Liquid temperature: Standard: -10 degC to 65 degC, Upon request: -20 degC to 120 degC
• Maximum operating pressure: 12 bar (PN12)
• Anti-clockwise rotation when facing pump's suction port
• Impeller: AISI304/HT200
• Mechanical seal in compliance with DIN 24960
• Lubricated by internal recirculating pumped liquid
• Counter flange available on request

Motor

• Closed construction, external ventilation
• Insulation class: F
• Protection class: IP54
• Performance in compliance with CEI 2-3 (IEC 34.1)
• Max. ambient temperature: +40 degC
• Overload protection

Construction Features

• Single-impeller centrifugal pump featuring axial intake and radial discharge
• Inlet and outlet DN in compliance with EN 733 (ex DIN 24255) and UNI 7467
• Flanges in compliance with UNI 2236 and DIN 2532
• Rear entry (impeller, control valve and motor can be extracted without disconnecting the pump body from the pipes)

Accessories On Request

• Galvanised iron threaded counter flanges
• Flanged tapered coupling
• Pump and motor sealing gasket

Identification Codes

• XST - Standard Centrifugal Pump
• m - Single Phase (m is omitted for three-phase)
• 32 - Outlet Diameter (mm)
• 125 - Impeller Nominal Diameter (mm)
• 11 - Rated Power (1/10 kW)