Onga CSM Vortex Pump – Cast Iron Sump Pump
Description
Introducing the CSM240 Vortex Pump: a reliable and rugged cast iron submersible pump designed for an array of dewatering, drainage, water treatment, and wastewater applications.
Specifically tailored for scenarios where solids may be present, the CSM240 is ideal for managing non-contaminated rain, waste, and groundwater from pits. This pump also excels in clean water dewatering tasks, circulating water for treatment purposes, managing grey water, and servicing commercial ponds and fountains.
One of the standout features of the CSM240 is its dry motor design, combined with an automatic thermal overload protection and mechanical overload switch (autocut). This sophisticated design ensures efficient operation with maximum starting torque, all while preventing excessive current draw.
The pump features dual mechanical seals housed in a durable cast iron oil chamber. Paired with stainless steel shafts and dual ball bearings, these components contribute to a smooth operation and a significantly extended pump life. The design of the stainless steel shaft minimises deflection, which further prolongs the life of seals and bearings.
The CSM240 is constructed from solid, durable, and rugged cast iron, offering high abrasion resistance to suspended particles. This robust construction, coupled with stainless steel fasteners, provides excellent corrosion resistance, ensuring the pump’s longevity. An epoxy seal connects the motor and the cable, adding an extra layer of protection against water ingress, even in harsh environments.
Designed for continuous duty at 40°C and intermittent duties at 50°C, the CSM240 can handle submergence up to 30 meters, making it ideal for deep pit dewatering. Optional Guide Rails are available for a hassle-free installation without needing to enter the pit.
Key Features:
- 10 mm free passage
- Vortex impeller
- Carbon ceramic mechanical seal
- Auto cut out switch
- Thermal overload protection
- Float switch
- Moisture sealed cable inlet
- Max head of 10 m
- Max flow of 250 lpm
In conclusion, the CSM240 Vortex Pump is more than just a cast iron sump pump. It’s a robust, reliable, and highly efficient solution for your water management needs.


