Design

Application

• Stormwater retention tanks
• Activated sludge tank
• Sludge treatment
• Mixing and buffer basins
• Special applications

Liquid

For suspension and homogenisation in commercial areas of:

• Process sewage
• Sewage containing faeces
• Wastewater (with small amounts of sand and gravel)

Equipment/function

• Thermal motor monitoring with bimetallic strip
• Single-stage planetary gear
• 3-chamber system
• Operation with frequency converter possible

Type key

Technical data

• Mains connection: 3~400 V, 50 Hz
• Fluid temperature: 3 … 40 °C (37 … 104 °F)
• Submerged operating mode: S1
• IP rating: IP68
• Insulation class: H
• Max. switching frequency: 15/h
• Max. immersion depth: 20 m (66 ft)

Materials

• Housing: EN-GJL-250 (ASTM A48 Class 35/40B)
• Seal:
  • Motor/sealing chamber: FPM (FKM)
  • Gasket/gear chamber: SiC/SiC
  • Gear chamber/pre-chamber: FPM (FKM)
  • Fluid side: SiC/SiC
• Propeller:
  • OPTI-TR 50-3/60-3/80-3: 1.4408 (ASTM A 351)
  • OPTI-TR 90-2: PUR/GFK (PUR/GFRP)
  • OPTI-TR 120-1: PA6G

Construction

Propeller

2- or 3-bladed propeller made of solid or composite material. Nominal propeller diameter of 500 mm to 1200 mm with clogging-free propeller geometry.

Motor

Surface-cooled submersible motor in three-phase current design with permanently lubricated und large-size rolling bearings. The motor winding is equipped with temperature monitoring. The motor heat is given off directly to the surrounding fluid via the motor housing. The connection cable is designed for heavy mechanical loads, sealed water pressure-tight against the fluid and is sealed longitudinally watertight. The connection cable has bare cable ends and is 10 m (33 ft) long as standard.

Seal

The system is sealed by a 3-chamber system:

• Pre-chamberThe high-volume pre-chamber has been filled with gear oil to absorb any leakage at the seal on the fluid side. A mechanical seal is used as the seal on the fluid side. A rotary shaft seal seals towards the gear chamber.
• Gear chamberThe gear chamber has been filled with gear oil to guarantee continuous lubrication of the planetary gear and the gear bearings. A mechanical seal seals towards the sealing chamber.
• Sealing chamberThe high-volume sealing chamber is filled with white oil and absorbs any leakage from the gear chamber. A rotary shaft seal seals towards the motor.

Gear

Single-stage planetary gear with exchangeable transmission. Gear bearings have been dimensioned large to absorb resulting stirring forces and not transfer these to the motor bearing.

Scope of delivery

• Submersible mixer with attached propeller and connection cable
• Accessories attached, depending on the installation type
• Installation and operating instructions

Options

• Thermal motor monitoring as temperature controller and temperature limiter
• Thermal motor monitoring with PTC sensor
• Fluid temperatures up to 60 °C (140 °F), depending on the motor type and motor capacity
• Pre-chamber monitoring
• Ex-rated in accordance with ATEX, FM and IEC-Ex
• Ceram coating for housing parts made of grey cast iron

Accessories

• Mounting bracket for wall and floor fixation
• Lowering device
• Auxiliary lifting device
• Cable bollard to secure the hoist cable
• Adjustable stop
• Additional rope anchoring
• Fixation sets with anchor bolts