Centrifugal pump Rexa SUPRA

for wastewaterfor sandelectric

Overview
Transport sewage efficiently and economically. Ready for networking in digital wastewater management with Wilo-DDI.

Key features

• Non-clog and low-vibration hydraulics design ensures a high level of operational reliability
• A high level of hydraulic efficiency and optional IE3 motor technology (based on IEC 60034-30-1) keep operating costs low
• Extensive configuration options guarantee customised solutions
• Various Ceram coatings ensure a long service life in abrasive and corrosive fluids
• Simple integration into the system control and monitoring of the pump with the optional Wilo-DDI:
  • Easy connectivity via Ethernet interface
  • Easy to integrate into existing control technology thanks to the use of standard protocols
  • Day-to-day time savings and reduced workload thanks to convenient remote monitoring of the operating state and digital tools such as the rating plate, maintenance logbook and user manual

Series description
Whether untreated or pre-treated sewage – the submersible pumps of the Wilo-Rexa SUPRA series have been developed for the various requirements in modern sewage pumping. Vortex, single-channel or multi-channel impeller, the Wilo-Rexa SUPRA always provides a combination of clogging resistance and energy efficiency. The Rexa SUPRA is ideal for safe and economical sewage transport. In combination with optionally available IE3 motors (in accordance with IEC 60034-30-1) operating costs are reduced. The Wilo-DDI can be integrated to meet the requirements of digital connectivity.

Design
This submersible pump is designed for stationary and portable wet and stationary dry installations. The motors are designed for continuous duty.

Liquid
For pumping in commercial areas of:

• Untreated sewage
• Sewage containing faeces
• Process sewage
• Wastewater (with small amounts of sand and gravel)

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 dependent)
• Motor dependent monitoring devices:
  • Winding temperature with bimetallic or PTC sensor
  • Leakage detection for sealing chamber, leakage chamber, and motor/terminal compartment

Type key (example and explanation)
Example: Wilo-Rexa SUPRA-M30-418A + T 34-6/50KEx-E3

Type key breakdown:
Hydraulics: Rexa SUPRA-M30-418A
Product family: Rexa — Submersible sewage pump
Series: SUPRA — Series
Impeller type: M = multi-channel (V = vortex, C = single-channel, M = multi-channel)
30 = nominal diameter of discharge port (e.g. DN 300)
41 = performance indicator
8 = characteristic curve number
A = material version: Standard version
Motor example: T 34-6/50KEx-E3
T = motor design (T = surface-cooled motor; FK/FKT = self-cooling motor with active cooling; HC = self-cooling hermetically separated cooling)
34 = size
6 = number of poles
50 = package length in mm (x10 = package length in mm representation)
K = seal version (H = rotary shaft seal/mechanical seal; G = two separate mechanical seals; K = block seal cartridge with two mechanical seals)
Ex = Ex approval in accordance with ATEX or FM
E3 = Motor efficiency class (E3 = IE3 Premium Efficiency; E4 = IE4 Super Premium Efficiency)

Hydraulics
Discharge port with a horizontal flange connection. Maximum dry solids content: 8% for vortex, single-channel and two-channel impellers; 5% for three- and four-channel impellers. Available impeller types: vortex, single-channel, multi-channel.

Motors and cooling

• T motor: Surface-cooled submersible motor without cooling system for wet installation. Housing transmits motor heat to the fluid. Depending on size, T motors may operate in short-time duty.
• FK motor: Self-cooling motor with active cooling system for wet and dry installation. Cooling system filled with white medical grade oil, unpressurised; impeller on motor shaft circulates coolant; cooling flange transmits heat to pumped fluid.
• FKT motor: Self-cooling motor with closed cooling circuit; coolant = water/glycol mix; impeller circulates coolant; built-in pressure relief valve limits operating pressure to 3 bar.
• HC motor: Self-cooling motor with closed hermetically sealed cooling circuit; magnetically driven impeller circulates coolant; built-in pressure relief valve limits operating pressure to 3 bar.

Seal
All motors have a sealing chamber collecting leakage from the fluid side mechanical seal. Seal designs (motor dependent): Design H (mechanical seal fluid side + rotary shaft seal motor side), 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 not dangerous to the environment: white medical grade oil; water-glycol mixture (35% glycol / 65% water).

Scope of delivery

• Pump
• Fitted accessories as ordered
• Installation and operating instructions

Options

• Special voltages
• Pumping fluids up to 60 °C (140 °F)
• Motor dependent monitoring devices (PTC upgrade, leakage monitoring, bearing temperature, vibration monitoring)
• Ceram coating for abrasive and corrosive fluids
• Digital Data Interface (Wilo-DDI) for integration into control systems and monitoring: Ethernet interface; ModBus/TCP or OPC UA integration; remote monitoring
• Ex-rated options: ATEX, FM, IECEx

Accessories

• Suspension unit for stationary wet installation
• Pump foot for portable installation
• Foot elbow for stationary dry installation
• Level controls
• External moisture probe for leakage detection
• Fixation sets with anchor bolts
• Slinging gear
• Switchgear and relays

Logos / Certifications
For use in hazardous areas (Ex) depending on configuration and approvals.

Caractéristiques / spécifications techniques

• Mains connection: 3~400 V, 50 Hz
• Immersed operating mode: continuous duty (S1)
• Non-immersed (motor dependent): T motor: S2-15 or S2-30; FK/FKT/HC motors: continuous duty (S1)
• IP rating: IP68 (permanently immersed)
• Insulation class: H
• Fluid temperature range: 3 … 40 °C (37 … 104 °F) (option up to 60 °C available)
• Max. immersion depth: 20 m (66 ft)
• Hydraulic housing / impeller / motor housing materials: EN-GJL-250 or EN-GJS-500-7 (ASTM equivalents)
• Seals: static Nitrile (NBR); fluid side SiC/SiC; motor side SiC/SiC or C/Cr (motor dependent)
• Shaft material: Stainless steel 1.4021 (AISI 420)
• Max. dry solids content: 8% (vortex/single/two-channel), 5% (three-/four-channel)