A high-efficiency, clog-resistant submersible sewage pump with a cutter system, designed for reliable pressure drainage in commercial buildings.
The Wilo-Rexa FIT-S03 grinder pump ensures reliable pressure drainage in commercial applications compliant with the EN 12050-1 standard. A radial cutter with a dual-cutting action reliably shreds solids, effectively preventing blockages and ensuring operational safety. Overall costs are significantly reduced: optimized hydraulics deliver excellent efficiency and high discharge heads, while the system allows for the use of small-diameter piping. The high-quality stainless steel motor is lightweight and easy to maintain, offering excellent corrosion resistance even when not fully submerged. A high-quality sealing system featuring dual mechanical seals ensures a long service life.
Features/Product Advantages
Radial cutter with dual-cutting action provides excellent clog resistance
Optimized hydraulics and cutter combination cover a wide range of discharge heads
Low overall installation costs due to the use of small-diameter piping
Design meets the requirements of various building types
High-quality motor with dual mechanical seals and optional seal chamber monitoring ensures a long service life
Stainless steel housing guarantees excellent corrosion resistance, even when the motor is not submerged
Construction
Fully submersible grinder pump designed for stationary and portable wet-well installation (intermittent operation).
Fluids
For pumping the following in commercial environments:
Sewage containing fecal matter
Wastewater (containing small amounts of sand)
Sewage pumping in accordance with the EN 12050 standard
The pump complies with the requirements of EN 12050-1.
Equipment/Function
Radial cutter with dual shearing effect
Motor thermal monitoring with bimetallic sensors
Single-phase AC motor with self-switching thermal motor protection
Single-phase AC motor with separate capacitor box
Different versions:
Version "P": with plug
Version "A": with float switch and plug
Version "O": bare cable ends
Model code
|
Example: |
Rexa FIT-S03-123A/21M015-523/P |
|
Rexa |
Submersible sewage pump |
|
FIT |
series |
|
S |
|
|
03 |
Nominal diameter of pressure connection: DN 32/40 |
|
123 |
Definition of hydraulic components |
|
A |
Material specifications: Standard |
|
2 |
Number of poles |
|
1 |
IE class |
|
M |
Power supply connection specifications: M = Single-phase AC (1~) |
|
15 |
Value / 10 = Motor rated power P (unit: kW) |
|
- |
Non-explosion-proof grade |
|
5 |
Power supply frequency: 5 = 50 Hz / 6 = 60 Hz |
|
23 |
Rated voltage code |
|
P |
Optional electrical equipment: O = With bare cable ends |
Technical data
Mains connection: 1~230 V, 50 Hz or 3~400 V, 50 Hz
Operation mode (immersed): S1
Operation mode (non-immersed): S2-15 min; S3 10%
Protection class: IP68
Insulation class: F
Fluid temperature: 3 ... 40 °C (37 ... 104 °F)
Max. fluid temperature: 60 °C (140 °F) for 3 minutes
Materials
Pump housing: EN-GJL-250 (ASTM A48 Class 35/40B)
Impeller: EN-GJL-250 (ASTM A48 Class 35/40B)
Cutting device: 1.4528/59 HRC (AISI 440B+Co)
Motor housing: 1.4301 (AISI 304)
Shaft: 1.4401 (AISI 316)
Motor-side seal: C/MgSiO
Medium-side seal: SiC/SiC
Static seals: NBR (Nitrile rubber)
Type
Rexa FIT-S ... /M ... /P
Submersible pump equipped with a radial cutting device featuring a dual-shear effect. Horizontal discharge port with flange and oval connections. Hydraulic housing and impeller made of grey cast iron; cutting device made of hardened blade steel. Surface-cooled single-phase motor with automatic thermal motor protection. Oil-filled sealing chamber with two mechanical seals. Motor housing made of stainless steel. Detachable power cable with capacitor box and plug (CEE 7/7). Pump suitable for use in Zone 2 potentially explosive atmospheres.
Rexa FIT-S ... /M ... /A
Submersible pump equipped with a radial cutting device featuring a dual-shear effect. Horizontal discharge port with flange and oval connections. Hydraulic housing and impeller made of grey cast iron; cutting device made of hardened blade steel. Surface-cooled single-phase motor with automatic thermal motor protection. Oil-filled sealing chamber with two mechanical seals. Motor housing made of stainless steel. Detachable power cable with capacitor box, float switch, and plug (CEE 7/7). Pump not suitable for use in potentially explosive atmospheres.
Rexa FIT-S ... /T ... /O
Submersible pump equipped with a radial cutter featuring a dual-cutting action. Horizontal discharge port with flange and oval connections. Hydraulic housing and impeller made of grey cast iron; cutter made of hardened blade steel. Surface-cooled 3-phase motor equipped with motor overheating protection. Oil-filled sealing chamber with two mechanical seals. Motor housing made of stainless steel. Detachable power cable with bare cable ends. Pump suitable for use in Zone 2 potentially explosive atmospheres.
Scope of delivery
Pump
Installation and operating instructions
Accessories
Power cable, fixed cable length:
1-phase motor: max. 30 m (98 ft).
3-phase motor: max. 50 m (164 ft).
External rod electrode for sealing chamber monitoring
Suspension device for wet-well installation
Pump stand for portable installation
Level control devices
Fastening kit with anchor bolts
Mounting accessories and chains
Switchgear, relays, and plugs