Flumen EXCEL-RZPE 20 ... 40
Recirculation pump
Reliable sewage transport in the wastewater treatment plant with high volume flow and low delivery head.
- Reliable continuous operation due to low clogging propellers and flow housing that is pump in non-clog design.
- High operational reliability by using stainless steel investment-cast propellers
- Reduction of energy costs thanks to high pump efficiency and standard IE3 motor
- Customer-specific configuration taking into account the different pipe diameters and volume flows
- Simple adaptation to the system parameters through operation with a frequency converter
- Easy installation and removal, even when the basins are filled due to lowering devices and screwless coupling
- Simple replacement due to adaptation to existing installations
| Product description | Motor efficiency class | Nominal propeller diameter Dnom | Max. immersion depth | |
|---|---|---|---|---|
Flumen EXCEL-RZPE 20-1.145-4/13 S1 | IE3 | 200 mm | 20 m | |
Flumen EXCEL-RZPE 20-1.145-4/13 S5 | IE3 | 200 mm | 20 m | |
Flumen EXCEL-RZPE 25-3.95-6/16 S1 | IE3 | 250 mm | 20 m | |
Flumen EXCEL-RZPE 25-3.145-4/24 S1 | IE3 | 250 mm | 20 m | |
Flumen EXCEL-RZPE 30.95-6/16 S0 | IE3 | 300 mm | 20 m | |
Flumen EXCEL-RZPE 30.95-6/24 S1 | IE3 | 300 mm | 20 m | |
Flumen EXCEL-RZPE 40-1.95-6/24 S8 | IE3 | 400 mm | 20 m |
Logos/Certifications
Recommended services
Application-specific challenges in internal recirculation in wastewater treatment plants
- Costly continuous operation: 24 hours/day, 365 days/year
- High energy consumption
- High wear and high operating costs
- Frequent failures due to fluid containing fibres
- Load-sensitive control
Operationally reliable transport of sewage in wastewater treatment plants with a large volume flow and low delivery head – in continuous operation 365 days a year
The Wilo-Flumen OPTI-RZP and Wilo-Flumen EXCEL-RZPE series are used in biological wastewater treatment. In upstream denitrification and cascade denitrification, the sewage from the mechanical treatment stage and the return activated sludge from secondary treatment first flow into the denitrification tank and then from here into the downstream nitrification tank.
Here, Wilo recirculation pumps efficiently and reliably pump the nitrate-containing sewage from the nitrification tank back into the denitrification tank. This requires reliable transport of large volume flows at low delivery heads – even in continuous operation. The Wilo-Flumen OPTI-RZP and Wilo-Flumen EXCEL-RZPE series ensure reliable transport of sewage in wastewater treatment plants.
System expertise in design
During the design phase, we scrutinise our products for whether they can optimally fulfil your system requirements.
This means customer-specific configuration takes into account the different pipe diameters, volume flows and delivery heads as well as system-specific, load-sensitive control parameters.
For reliable operation with minimum energy requirements.
The right accessories for your process. Lowering and auxiliary lifting devices.
Perfect configuration and the selection of practice-oriented accessories according to the requirements of your wastewater treatment plant ensures you are on the safe side when it comes to positioning and installation.
- Lowering devices
- for optimal positioning
- sophisticated technology and robust materials
- Auxiliary lifting devices
- for secure installation
- sophisticated technology and robust materials
- quick to use due to easy installation
- reduced maintenance costs: can simply be taken out of the basin for maintenance
- Flexible adaptation to existing discharge pipe connections due to individually adjustable housing units
Process reliability thanks to adaptation to changing system conditions. Wilo-EFC: External frequency converter.
Whether at night, during the day or due to seasonal factors such as the holiday season, changing volume flows reach the wastewater treatment plant daily. To increase process reliability, for example during heavy rainfall, the Wilo-Flumen OPTI-RZP and Wilo-Flumen EXCEL-RZPE can be equipped with the Wilo-EFC frequency converter for load-based and demand-based control to adapt to changing system conditions.
Key Facts
Approx. 50%
of total potential energy savings in water treatment are possible with the Wilo-EFC.
Up to 5,000,000 t CO2
can be saved worldwide in existing wastewater treatment plants.
FAQ
1. When and where do I use a recirculation pump?
For low heights and high volume flows within the biological treatment and internal recirculation of municipal and industrial wastewater treatment plants.
2. Are high-efficiency versions available?
Yes, all Wilo-Flumen EXCEL-RZPE are equipped with IE3 motors as standard.
3. Which discharge pipe sizes can Wilo-Flumen OPTI-RZP and Wilo-Flumen EXCEL-RZPE be adapted to?
The nominal diameters range from DN 200/250/300/400/500/600/800 – this provides a high degree of flexibility in installation and configuration.
We have answers to your questions
Our products and services have aroused your interest? Then we are happy to help!
Whether it's creating an offer or editing service specifications, designing different types of equipment, advising on the selection of pumps and switchgear, or just helping with hydraulic and control issues.
Feel free to contact your nearest sales office and make an appointment. We look forward to you!
Find the right contact for your question.
Design
Recirculation pump: Submersible mixer, directly driven with attached flow housing.Application
- Recirculation between nitrification and denitrification in the biological wastewater treatment
- Returning return activated sludge to the activated sludge tank or for sludge treatment
- Water circulation for aquaculture (fish farming)
- Special applications
Liquid
For pumping in commercial areas of:
- Sewage containing faeces
- Return activated sludge
- Process water
Equipment/function
- Thermal motor monitoring with bimetallic strip
- IE3 submersible motor(according to IEC 60034-30)
- Flow housing
- Operation with frequency converter possible
Type key
Example: | Wilo-Flumen EXCEL-RZPE 40-1.95-6/24Ex S8 |
Flumen | Submersible mixer, horizontal |
EXCEL-RZPE | Series: Recirculation pump with IE3 asynchronous motor |
40 | x10 = nominal propeller diameter in mm |
1 | Model |
95 | x10 = nominal propeller speed in rpm |
6 | Number of poles |
24 | x10 = stator pack length in mm |
Ex | Ex-rated |
S8 | Propeller code for special propeller (omitted for standard propeller) |
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
- Motor housing: 1.4408 (ASTM A 351) or EN-GJL-250 (ASTM A48 Class 35/40B)
- Seal housing: 1.4408 (ASTM A 351)
- Seal:
- On the motor side: SiC/SiC or NBR (nitrile)
- Fluid side: SiC/SiC
- Propeller: 1.4408 (ASTM A 351)
- Flow housing: 1.4571 (AISI 316TI)
Construction
Hydraulics
Propeller made of solid material with clogging-free propeller geometry. Pump in non-clog design flow housing with guide claw and two flange claws. The guide claw ensures smooth function when lifting and lowering the recirculation pump. The flange claws can be readjusted, ensure optimum centring on the discharge pipe and stabilise the recirculation pump at high operating pressure.
Alternative version with flange connection for direct screwing to the discharge pipe.
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.
The submersible motor meets the IE3 motor efficiency class (according to IEC 60034-30).
Seal
Large-volume sealing chamber with double shaft sealing. The sealing chamber is filled with white oil and absorbs the leakage from the seal on the fluid side. A corrosion- and wear-resistant mechanical seal is used on the fluid side. The seal on the motor side involves either a rotary shaft seal or a mechanical seal.
Scope of delivery
- Recirculation pump with attached flow housing and connection cable
- 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
- Sealing chamber monitoring
- Ex-rated in accordance with ATEX, FM and IEC-Ex
- Ceram coating for housing parts made of grey cast iron
Accessories
- Lowering device
- Auxiliary lifting device
- Cable bollard to secure the hoist cable
- Additional rope anchoring
- Fixation sets with anchor bolts