Rexa SOLID
Submersible pump
Wilo-Rexa SOLID-Q with Nexos Intelligence – The intelligent system solution for a smart sewage pump station
- Maximum operational reliability and reduced service costs, especially for pumping untreated sewage, thanks to self-cleaning properties
- Lower energy costs thanks to high hydraulic efficiency and up to IE5 motor technology in wet and dry well installation (based on IEC TS 60034-30-2)
- Corrosion protection provided by an optional Ceram coating for a long service life in aggressive media
- An optional Digital Data Interface (DDI) with integrated vibration monitoring, data logger, web server and digital rating plate for convenient monitoring and system integration
- Nexos Intelligence can be integrated for pump and system optimisation
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Request InformaitonThe Wilo-Rexa SOLID submersible pump with Nexos Intelligence is a next-generation solution for efficient sewage and wastewater pumping.
Designed to handle untreated sewage with high levels of solids and fibrous material, this submersible sewage pump ensures maximum reliability, reduced blockages, and lower operating costs. With its energy-efficient motor and innovative hydraulics, it significantly cuts energy consumption while delivering consistent performance.
Integrated digital networking through Nexos Intelligence allows real-time monitoring, predictive maintenance, and smarter operation—making it one of the most advanced and cost-effective wastewater submersible pumps on the market.
Design
This submersible pump is designed for stationary and portable wet and stationary dry installations. The motors are designed for continuous duty. Includes Nexos Intelligence, from easy pump control up to intelligent system control.Liquid
For pumping in commercial areas of:
- Untreated sewage
- Sewage containing feces
- Process sewage
Equipment/function
- Heavy-duty cast iron design.
- Sealing chamber to collect any leakage from the mechanical seal on the fluid side.
- Leakage chamber to collect any leakage from the mechanical seal on the motor side (only motor size 20).
- Ex approval according to FM
- Motor monitoring with integrated Digital Data Interface:
- Winding temperature with PTC and Pt100 sensors.
- Leakage detection for sealing chamber and leakage chamber with capacitive sensor.
- Vibration sensor
- Data logger
- Web server
- Ethernet interface
- Nexos Intelligence, from easy pump monitoring to an intelligent pump control system with up to four pumps:
- LPI system mode: control mode for pump and external variable speed drive (controlled by the pump) with clogging detection.
- LSI system mode: Full control of an overall pumping station with up to four pumps, including clogging detection. Each pump operates on a variable speed drive. One pump operates as the primary pump. The primary pump controls all other pumps based on the system parameters.
- The default system mode LPI is free. LSI system mode can be enabled with a license key.
Type key
Example: | Wilo-Rexa SOLID-Q15-52A + FKT 20.2M-4/32GEx-P4 |
Hydraulics: | Wilo-Rexa SOLID-Q15-52A |
Rexa | Submersible sewage pump |
SOLID | Series with Nexos Intelligence |
Q | Impeller type: semi-open two-channel impeller |
15 | Nominal diameter of discharge port (ANSI B16.1, Class 125)
|
52 | Performance indicator |
A | Identifier for material and coating type |
Motor: | FKT 20.2M-4/32GEx-P4 |
FKT | Motor design:
|
20 | Size |
2 | Internal model code |
M | Shaft design
|
4 | Number of poles |
32 | x10 = package length in mm |
G | Seal design:
|
Ex | Ex approval in accordance with FM |
P | Motor design: Permanent magnet motor |
4 | Motor efficiency class (derived from IEC 60034-30)
|
Technical data
- Mains connection: 3~460 V, 60 Hz
- Submerged operating mode: continuous duty (S1)
- Non-immersed operating mode:
- T motor: 15 minutes short-time duty (S2-15) or 30 minutes short-time duty (S2-30)
- FKT motor: continuous duty (S1)
- IP rating: permanently submerged (IP68)
- Insulation class: H
- Fluid temperature: 37 … 104 °F (3 … 40 °C)
- Max. immersion depth: 66 ft (20 m)
- Two-component epoxy coating as standard
Materials
- Hydraulic housing: ASTM A48 Class 35/40B (EN-GJL-250) or ASTM A536 70-50-05 (EN-GJS-500-7)
- Impeller: ASTM A536 70-50-05 (EN-GJS-500-7)
- Motor housing: ASTM A48 Class 35/40B (EN-GJL-250)
- Seals:
- Static: FKM (FPM)
- On the fluid side: SiC/SiC
- On motor side: SiC/SiC
- Shaft: Stainless steel AISI 420 (1.4021)
Construction
Hydraulics
Discharge port with horizontal flange connection. Maximum dry solids content is 8 %. The impeller type used is a semi-open two-channel impeller.
T motor
Surface-cooled high efficiency submersible permanent magnet motor without cooling system for wet installation. The housing parts transmit the waste heat of the motor directly to the fluid. The motor itself is dry. Permanently lubricated rolling bearings are used for the motor bearings. The power cable is longitudinally watertight and has bare cable ends. Depending on the motor size and the motor power, the motors can be installed dry and operate in short-time duty.
FKT motor
Self-cooling high efficiency submersible permanent magnet motor with active cooling system for wet and dry installation. The cooling system is designed with a closed cooling circuit. The filled coolant is a mixture of water and glycol. An impeller driven by the motor shaft continuously circulates the coolant. The cooling system is unpressurized when cold. A built-in pressure relief valve limits the maximum operating pressure to 43 psi (3 bar). The cooling flange transmits the waste heat to the pumped fluid. Permanently lubricated roller bearings are used for the motor bearings. The power cable is longitudinally watertight and has bare cable ends.
Seal
Seals on the fluid side and the motor side are available in the designs shown below:
- Design G: Two independent mechanical seals
- Design K: Block seal cartridge with two independent mechanical seals
Operating fluids
All operating fluids are potentially biodegradable and environmentally safe:
- Medical grade white oil
- Water-glycol mixture (35 % glycol and 65 % water)
Wilo-EFC variable speed drive
The high efficiency permanent magnet motor operates on a Wilo-EFC variable speed drive. Other variable speed drives can be used, after an approval by Wilo.
Motor efficiency classes (based on IEC 60034-30)
The motors meet the IE4 (Super Premium Efficiency) efficiency level.
Scope of delivery
- Pump with permanent magnet motor
- External variable speed drive Wilo-EFC (ordered separately)
- Accessories as ordered
- Installation and operating instructions
Options
- Pumping fluids up to 140 °F (60 °C)
- Motor bearing temperature monitoring
- Ceram coating for abrasive and corrosive fluids
- Motors with IE5 (Ultra-Premium Efficiency) efficiency level
Accessories
- Suspension unit for stationary wet installation
- Foot elbow for stationary dry installation
- Level controls
- I/O modules to extend digital and analog inputs and outputs
- Fixation sets with anchor bolts
- Slinging gear