Rexa SOLID
Submersible pump
Wilo-Rexa SOLID – intelligent system solutions for smart sewage pumping stations
- Clogging detection algorithm and self-cleaning properties enable outstanding operational reliability and reduced service effort
- High hydraulic efficiency and up to IE4 / IE5 motor technology in wet and dry installation (based on IEC TS 60034-30-2) result in lower energy costs
- 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
- Standardised network interface and open communication protocols for easy connection
- Corrosion protection provided by an optional Ceram coating for a long service life in aggressive fluids
Logos/Certifications
Recommended services
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.Application
undefinedLiquid
For pumping in commercial areas of:
- Untreated sewage
- Sewage containing faeces
- 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 (motor size 20 only).
- 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 frequency converter (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. A frequency converter drives each pump. One pump operates as the primary pump. The primary pump controls all other pumps depending on the system parameters.
- The standard LPI system mode is free of charge. The LSI system mode can be enabled with a licence 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, e.g. DN 150 |
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 ATEX or FM |
P | Motor design: Permanent magnet motor |
4 | Motor efficiency class (derived from IEC 60034-30)
|
Technical data
- Mains connection: 3~400 V, 50 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: IP68 (permanently submerged)
- Insulation class: H
- Fluid temperature: 3 … 40 °C (37 … 104 °F)
- Max. immersion depth: 20 m (66 ft)
Materials
- Hydraulic housing: EN-GJL-250 (ASTM A48 Class 35/40B) or EN-GJS-500-7 (ASTM A536 70-50-05)
- Impeller: EN-GJS-500-7 (ASTM A536 70-50-05)
- Motor housing: EN-GJL-250 (ASTM A48 Class 35/40B)
- Seals:
- Static: FPM (FKM)
- On the fluid side: SiC/SiC
- On motor side: SiC/SiC
- Shaft: Stainless steel 1.4021 (AISI 420)
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 unpressurised when cold. A built-in pressure relief valve limits the maximum operating pressure to 3 bar (43 psi). 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 frequency converter
A Wilo-EFC frequency converter drives the high efficiency permanent magnet motor. After an approval by Wilo, other frequency converters can be used.
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 frequency converter Wilo-EFC (ordered separately)
- Accessories as ordered
- Installation and operating instructions
Options
- Special voltages
- Pumping fluids up to 60 °C (140 °F)
- Motor bearing temperature monitoring
- Ceram coating for abrasive and corrosive fluids
- Motors with IE5 (Ultra-Premium Efficiency) efficiency level
- Ex-rated according to
- ATEX
- FM
- IECEx
Accessories
- Suspension unit for stationary wet installation
- Foot elbow for stationary dry installation
- Level controls
- I/O modules to extend digital and analogue inputs and outputs
- Fixation sets with anchor bolts
- Slinging gear