Rexa PRO-S
Grinder pump, Submersible 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
- Designed for easy selection when requirements are demanding
- Long service life thanks to a high-quality motor with two mechanical seals and a leakage detection in the sealing chamber
Recommended services
The Wilo-Rexa PRO-S is the most robust pump in the Wilo-Rexa grinder pump family, offering extended options and the ability to be installed in potentially explosive areas. Its radial macerator, made of deep-hardened martensitic stainless steel, safely cuts fibers and solids to help reduce clogging.
The macerator is coupled with a highly efficient hydraulic that provides very high delivery head from low power consumption. The result is increased operational reliability, low installation costs, and higher pressure with less energy consumption.
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Design
Fully submersible grinder pump for stationary and portable wet installation in continuous operationLiquid
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