Design

Submersible sewage pump with various cooling systems

Application

• Pumping of sewage with solid constituents in water treatment systems and pumping stations
• Local drainage and water control
• Industrial applications

Type key

Special features/product advantages

• Operation in stationary wet well and dry well installation
• Submersible
• Easy installation due to suspension unit or pump base
• Special materials and coatings against abrasion and corrosion
• Longitudinally watertight cable lead-in (depending on motor)
• Adjustment of duty point by trimming the impeller

Technical data

• Mains connection: 3~400 V, 50 Hz
• Immersed operating mode: S1
• Surfaced operating mode with self-cooling motor: S1
• Protection class: IP 68
• Max. fluid temperature: 3 ‐ 40 °C, higher temperatures on request
• Sealing: With two mechanical seals or one block seal cartridge, depending on the motor
• Free ball passage: 80 - 170 mm.
• Permanently lubricated roller bearings
• Max. immersion depth: 20 m

Equipment/function

• Heavy-duty version made of grey cast iron
• Self-cooling motors with 1‐ or 2-chamber system
• Simple installation via suspension unit or pump base

Description/design

Submersible sewage pump as submersible monobloc unit for stationary wet well and dry well installation.

The outlet on the pressure side is designed as horizontal flange connection. The maximum possible dry matter content is 8%, depending on the hydraulics and impeller type.

The following impeller shapes are used:

• Two-channel impeller (Z)
• Three-channel impeller (D)
• Four-channel impeller (V)

Each multi-channel hydraulic unit (Z, D, V) is equipped with a mobile and stationary wear ring. These contribute long-term to ensuring the uniform efficiency of the unit.

Dry motors (T motors) give off their heat directly to the surrounding fluid via the housing components and can be used in immersed state for permanent operation. Depending on the size, they can also be used in non-immersed state for short-term or permanent operation.

The oil-filled motors (FK motors) and self-cooling dry motors (FKT motors) give off their heat to the pumped fluid via a built-in heat exchanger. Therefore, these motors are suitable for permanent operation in immersed and non-immersed condition or for dry well installation.

All motors have a sealing chamber that protects the motor from fluid ingress. It can be accessed from the outside and can be monitored with an optional sealing chamber electrode.

All filling fluids used are potentially biodegradable and environmentally safe.

The cable inlet on the T and FKT motors is longitudinally watertight. Cable lengths can be individually configured.

Fluid-side and motor-side sealing is possible in the following versions depending on the motor type:

• Version G: Two independently operating mechanical seals
• Version K: Block seal cartridge with two independently operating mechanical seals

Materials

• Housing parts: EN‐GJL or EN‐GJS
• Impeller: EN‐GJL or EN‐GJS
• Static seals: NBR
• Sealing on pump side: SiC/SiC
• Sealing on motor side: NBR or SiC/SiC
• Shaft: Stainless steel 1.4021

Scope of delivery

• Submersible sewage pump
• Cable length per customer request
• Accessories per customer request
• Operating and maintenance manual

Accessories

• Suspension unit or pump base
• Various pressure outlets
• Chains
• Fixation sets with anchor bolts
• Switchgears, relays and plugs