Calpeda GXRM 12-16 Stainless Steel Submersible Drainage Pump for Rainwater Collection with Open Impeller

Rainwater collection and the extraction of water from streams are efficiently managed by the Calpeda GXRM 12-16. This submersible pump handles liquids at temperatures up to 40°C and is suitable for draining flooded rooms and tanks. It is specifically designed for continuous duty in collection pits or tanks where suspended solids up to 12 mm may be present.

Hydraulic output reaches a maximum flow rate of 450 L/min with a maximum total head of 14.7 m. Powered by a 0.9 kW single-phase 240v motor, the unit draws a rated current of 7.4 Amps. Internal cooling is achieved by fluid circulating between the motor jacket and outer shell, permitting safe operation during extended run cycles even when partially submerged.

The hydraulic configuration utilizes an open single impeller manufactured from chrome-nickel steel to ensure reliable solids handling. Flow behavior is optimized through a vertical delivery port, and an integrated suction filter prevents the entrance of debris larger than 12 mm. This configuration supports a minimum water level of 70 mm in automatic mode and 15 mm during manual service.

Mechanical durability is provided by the use of chrome-nickel stainless steel AISI 304 for all primary internal and external jackets. A double shaft seal with an intermediate oil chamber isolates the motor from the pumped liquid, with lubrication provided by oil suitable for food and pharmaceutical machinery. The induction motor includes an incorporated capacitor, thermal protector, and a double impregnation humidity-proof dry winding.

FEATURES

• Manufactured with an external jacket and motor jacket in AISI 304 stainless steel for superior corrosion resistance.
• Double shaft seal arrangement with an oil-filled chamber enhances motor protection during continuous submerged service.
• Oil chamber utilized for seal lubrication contains specialized oil safe for food and pharmaceutical machinery use.
• Automated drainage control is provided by an integrated float switch, enabling service in unattended collection pits.
• The 2-pole induction motor remains cooled by the pumped liquid flowing through the external jacket for thermal stability.
• Single-impeller open design allows for the passage of clean water containing suspended solids up to 12 mm.
• Motor reliability is supported by a double impregnation humidity-proof dry winding constructed to EN 60034-1 standards.
• Certified IP X8 protection rating facilitates continuous duty immersion at depths reaching up to 5 meters.