Radial pump Rexa FIT-S series

for wastewaterwastewaterelectric

Overview
The Rexa FIT-S is a fully submersible grinder sewage pump designed for reliable pressure drainage in commercial buildings according to EN 12050-1. It features a radial macerator with double shear effect and stainless-steel motor housing for corrosion resistance and long service life.

Key features

• Radial macerator with double shear effect for excellent clogging resistance
• Optimised hydraulics/macerator combination for broad delivery head coverage
• Allows connection to minimal-diameter pipework to reduce installation costs
• Available in multiple electrical versions and equipment options for easy selection
• Motor with two mechanical seals; optional sealing-chamber monitoring
• Stainless-steel motor housing and corrosion-resistant shaft materials

Applications / Liquids

• Sewage pumping in compliance with EN 12050-1 for commercial properties and compact pressure drainage systems

Equipment / Function

• Radial macerator with double shear effect
• Thermal motor monitoring (bimetallic sensor)
• Single-phase and three-phase motor variants; capacitor switchgear options
• Versions: P = with plug; A = with float switch and plug; O = bare cable ends

Product selection (excerpt)
Product description | Operating mode (non-immersed) | Discharge port | Rated power P2 | Cable length L | Ex field | Float switch | Mains plug | Mains connection | Article no.
Rexa FIT-S03-112A/21M011-523/A | S2-15 min, S3-10% | DN 32/40 | 1.1 kW | 10 m | (not Ex-rated) | yes | CEE 7/7 (Schuko) | 1~230 V, 50 Hz | 6098140
Rexa FIT-S03-112A/21M011-523/P | S2-15 min, S3-10% | DN 32/40 | 1.1 kW | 10 m | IECEx Zone 2 | no | CEE 7/7 (Schuko) | 1~230 V, 50 Hz | 6098141
Rexa FIT-S03-123A/21M015-523/A | S2-15 min, S3-10% | DN 32/40 | 1.5 kW | 10 m | (not Ex-rated) | yes | CEE 7/7 (Schuko) | 1~230 V, 50 Hz | 6098143
Rexa FIT-S03-224A/21T025-540/O | S2-15 min, S3-10% | DN 32/40 | 2.5 kW | 10 m | IECEx Zone 2 | no | no plug | 3~400 V, 50 Hz | 6098146

Design
Fully submersible grinder pump for stationary and portable wet installation in intermittent operation; horizontal discharge with flanged/oval connection; grey cast-iron hydraulics and hardened-steel macerator blades; oil-filled sealing chamber with two mechanical seals.

Scope of delivery

• Pump
• Installation and operating instructions

Accessories

• Connection cables with fixed lengths (1~ up to 30 m; 3~ up to 50 m)
• External pencil electrode for sealing-chamber monitoring
• Suspension unit for wet installation; pump support foot for portable use
• Level control devices; fixation kits; switchgear, relays and plugs

Logos / Certification
Selected variants available for Zone 2 hazardous areas (IECEx) and relevant regional certifications.

Technical specifications (summary)

• Mains connection: 1~230 V, 50 Hz or 3~400 V, 50 Hz
• Submerged operation: S1; Non-immersed: S2-15 min, S3 10%
• Protection class: IP68
• Insulation class: F
• Fluid temperature: 3 … 40 °C; max. 60 °C for 3 min
• Discharge port: DN 32/40
• Pump housing / impeller: EN-GJL-250
• Macerator: 1.4528/59 HRC (AISI 440B+Co)
• Motor housing: 1.4301 (AISI 304); Shaft: 1.4401 (AISI 316)
• Seals: motor side C/MgSiO; fluid side SiC/SiC; static NBR