Grundfos SEV.65.65.22.A.Ex.2.50D Cast Iron Ex-Rated Submersible Pump for Sewage with SuperVortex Impeller

Wastewater transfer and sewage pumping in municipal collection systems require the removal of contaminated liquids with a pH value between 4 and 10. The SEV.65.65.22.A.Ex.2.50D is intended for these environments, managing wastewater and grey water where reliable solids passage is necessary for continuous operation. This unit supports service in drainage stations and pump stations, maintaining stable performance in dry or submerged installations with liquid temperatures from 0 to 40°C. Installation is possible in subsurface collection pits prone to varying fluid ingress and environmental demands.

Hydraulic behavior is defined by a 2.2 kW three-phase motor operating on a 415v supply with a rated current of 5 Amps. This assembly generates a maximum flow of 750 L/Min and reaches a maximum head of 18.6 m to satisfy industrial discharge requirements. The model operates at a synchronous speed of 2895 rpm, ensuring consistent pressure behavior and circulation characteristics during the pumping cycle. Power is distributed through a 10-metre Lyniflex cable to support infrastructure in gravity drainage networks and pressurized sewer mains.

Internal fluid paths utilize a SuperVortex impeller configuration to facilitate the passage of solids in suspension. This centrifugal design allows for the free movement of particles up to 65 mm in diameter, preventing internal contact that could compromise volumetric efficiency over long-term service. By utilizing a vortex flow path, the unit minimizes internal friction and vibration to protect the rotating assembly during prolonged wastewater handling. The impeller handles liquids containing organic materials without internal clogging to maintain operational flow behavior in municipal collection pits.

Mechanical construction features a cast iron pump housing and motor shell with an IP68 enclosure rating for protection against liquid ingress. The motor is shielded by a SiC/SiC primary shaft seal and a CER/CARNBR secondary seal in an oil bath for insulation and durability. This A-version model includes an integrated moisture sensor and a water-in-oil sensor to facilitate operational monitoring in submerged environments. The casting includes a DN 80 inlet and a DN 65 outlet connection for integration into wastewater collection systems and treatment plant transfer infrastructure.

Features

• SuperVortex impeller design facilitates the passage of solids up to 65 mm through the pump casing to maintain hydraulic throughput.
• Cast iron pump housing and motor shell provide the structural rigidity required for dry or submerged installation depths up to 20 m.
• Double mechanical shaft seal arrangement with silicon carbide and ceramic/carbon faces in an oil bath ensures motor protection from liquid ingress.
• IP68 enclosure rating confirms the unit is suitable for permanent immersion in wastewater with a pH range of 4 to 10.
• DN 80 inlet and DN 65 outlet ports are sized for standard connection to wastewater collection pits and infrastructure.
• Lyniflex 10-metre power cable provides a secure electrical connection to three-phase 415v supplies in wastewater environments.
• Ex-rated motor construction according to IEC 60079-15 allows for safe operation in hazardous municipal and industrial zones.