REXA PRO-S
Submersible pump, Grinder pump
Efficient submersible sewage pump in non-clog design with macerator for reliable pressure drainage in commercial and municipal applications.
- Excellent anti-clogging reliability thanks to the radial macerator with double-shear effect.
- Optimized hydraulics and macerator combination for maximum delivery height with optimum efficiency.
- Low overall installation costs due to compatibility with the smallest possible piping.
- Long service life thanks to a high-quality motor with two mechanical seals and a leakage detection in the sealing chamber.
| Product Description | Operating Mode (non-immersed) | Discharge Port | Rated Power P₂ | Connection Cable Length | Ex Field of Application |
|---|---|---|---|---|---|
| Rexa PRO-S03-025 (1.5 HP) | S2-30 min, S3-25% | 1.5" ANSI Class 125 | 1.50 hp | 50.0 in | FM Division 1, FM Division 2 |
| Rexa PRO-S03-116 (2.3 HP) | S2-30 min, S3-25% | 1.5" ANSI Class 125 | 2.30 hp | 50.0 in | FM Division 1, FM Division 2 |
| Rexa PRO-S03-127 (3.4 HP) | S2-30 min, S3-25% | 1.5" ANSI Class 125 | 3.40 hp | 50.0 in | FM Division 1, FM Division 2 |
| Rexa PRO-S03-228 (5.2 HP) | S2-30 min, S3-25% | 1.5" ANSI Class 125 | 5.20 hp | 50.0 in | FM Division 1, FM Division 2 |
Efficient submersible sewage pump in non-clog design with macerator for reliable pressure drainage in commercial and municipal applications.
The Wilo-Rexa PRO-S grinder pump delivers reliable pressure drainage. Its radial macerator with a double-shear effect efficiently shreds solids, preventing clogs and ensuring safe operation. Additionally, overall costs are significantly reduced. First, the optimized hydraulics provide high efficiency and maximum discharge head. Second, the pump allows for connection to the smallest possible piping. The high-quality gray cast iron motor is robust and easy to maintain. A premium seal with two mechanical seals ensures a long service life.
Design
Liquid
For pumping in commercial areas of:
- Sewage containing feces
- Wastewater (with small quantities of sand)
Equipment/function
- Radial macerator with double shear effect
- Ex approval according to FM
- Winding temperature with bimetallic sensor
- Leakage detection for motor compartment and sealing chamber
- Connection cable with bare cable ends
Type Key
|
Example: |
Rexa PRO-S03-116A/21T017F646/O |
|
Rexa |
Submersible sewage pump |
|
PRO |
Series |
|
S |
Macerator |
|
03 |
Nominal diameter of the discharge port: ANSI B16.1, Size 1.5, Class 125 |
|
11 |
Performance indicator |
|
6 |
Characteristic curve number |
|
A |
Identifier for material and coating type |
|
2 |
Number of poles |
|
1 |
Motor efficiency class (derived from IEC 60034-30)
|
|
T |
Mains connection version:
|
|
017 |
Value/10 = rated power P2 in kW |
|
F |
Ex approval in accordance with FM |
|
6 |
Mains frequency: 60 Hz |
|
46 |
Rated voltage code:
|
|
O |
Connection cable with bare cable ends |
Technical Data
- Mains connection: 1~ 230 V, 60 Hz, 3~230 V, 60 Hz or 3~460 V, 60 Hz
- Submerged operating mode: continuous duty S1
- Non-immersed operating mode:
- Short-time duty: S2, 30 min
- Intermittent periodic duty: S3, 25% (10-minute cycles)
- IP rating: permanently submerged (IP68)
- Insulation class: F
- Fluid temperature: 37 to 104 °F (3 to 40 °C)
- Fluid temperature, max. 140 °F (60 °C) for 3 min
Materials
- Pump housing: ASTM A48 Class 35/40B (EN-GJL-250)
- Impeller: ASTM A48 Class 35/40B (EN-GJL-250)
- Macerator: AISI 440B+Co (1.4528/59 HRC)
- Motor housing: ASTM A48 Class 35/40B (EN-GJL-250)
- Shaft:
- Up to 2.5 kW: Stainless steel AISI 316 (1.4401)
- From 3.9 kW: Stainless steel AISI 420 (1.4021)
- Seals:
- On motor side: C/MgSiO
- On fluid side: SiC/SiC
- Static: Nitrile (NBR)
Construction
Single-phase version
The sewage pump features a radial macerator with a double shear effect. The pump has a horizontal discharge port with a flange connection. The hydraulics housing and impeller are made of gray cast iron, while the macerator is made of hardened cutting steel. The surface-cooled single-phase motor includes winding temperature monitoring and an internal moisture probe for leakage detection. The oil-filled sealing chamber with two mechanical seals also has an external moisture probe for leakage detection. The motor housing is made of gray cast iron. The pump is supplied with a detachable connection cable with bare cable ends. The pump has an Ex rating as standard.
Please note that the starting and operating capacitors must be provided on site.
Three-phase version
The sewage pump features a radial macerator with a double shear effect. The pump has a horizontal discharge port with a flange connection. The hydraulics housing and impeller are made of gray cast iron, while the macerator is made of hardened cutting steel. The surface-cooled three-phase motor includes winding temperature monitoring and an internal moisture probe for leakage detection. The oil-filled sealing chamber with two mechanical seals also has an external moisture probe for leakage detection. The motor housing is made of gray cast iron. The pump is supplied with a detachable connection cable with bare cable ends. The pump has an Ex rating as standard.
Scope of delivery
- Pump
- Installation and operating instructions
Options
- Motor winding monitoring with PTC sensor
- Motor windings in insulation class “H”
- Static gaskets in FPM (FKM)
- Special voltages
Accessories
- Capacitor kit for single-phase pumps consists of an operating capacitor and a start capacitor.
- Guide rail system for wet installation
- Portable base for portable installation
- Level control devices
- Fixation sets with anchor bolts
- Fixation accessories and chains
- Switchgear, relays and plugs