Wilo-Rexa CUT

Design

Submersible sewage pump with macerator for intermittent duty and continuous duty, for stationary and portable wet well installation.

Application

Pumping of sewage containing faeces as well as municipal and industrial sewage, including long-fibre constituents, in

  • Pressure drainage
  • House drainage
  • Sewage disposal
  • Water management
  • Environmental and water treatment technology

Type key

Example: Wilo-Rexa CUT GE03.26/P-T15-2-540X/P
Rexa Submersible sewage pump with retrodynamic hydraulics
CUT Series with macerator
GE Hydraulics version:
GI = interior macerator
GE = external macerator
03 Nominal diameter pressure connection:
03 = DN 32
04 = DN 40
26 Zero-delivery head in m
P Motor version:
S = stainless steel motor housing
P = cast iron housing
T Mains connection version:M = 1~

T = 3~

15 Value/10 = motor power P2 in kW
2 Number of poles
5 Frequency (5 = 50 Hz, 6 = 60 Hz)
40 Code for rated voltage
X Ex-ratedWithout supplement = without Ex-rated
X = with Ex-rated
O Additional electrical equipment:
without addition = with bare cable end
P = with plug

Special features/product advantages

  • High reliability
    through robust version made of grey cast iron with ATEX approval and longitudinally watertight cable inlet
  • High operational reliability
    though version with external macerator
  • Long service life
    through a high-quality motor seal with two independent mechanical shaft seals and optional pencil electrode for sealing chamber monitoring

Technical data

  • Mains connection: 1~230 V, 50 Hz or 3~400 V, 50 Hz
  • Immersed operating mode: S1
  • Non-immersed operating mode: S2-15 min/S2-30 min; S3 10%/S3 25% (motor-dependent)
  • Protection class: IP 68
  • Insulation class: F
  • Fluid temperature: 3…40 °C, max. 60 °C for 3 min
  • Max. immersion depth: 20 m
  • Cable length: 10 m
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Equipment/function

  • Macerator with internal or external blade and pulling cut
  • Winding temperature monitoring with bimetallic strip
  • ATEX approval (with motor version “P”)
  • Optional external pencil electrode for the sealing chamber monitoring

Description/design

Submersible sewage pump with internal or external macerator as submersible monobloc unit for stationary and portable wet well installation in intermittent and continuous duty.

Hydraulics

The outlet on the pressure side is designed as horizontal flange connection with a DN 32/40 combined connection. The maximum possible dry matter is 8 % (depending on the hydraulics) Single-channel and multi-channel impellers are used.

Motor

Single-phase and three-phase current glanded motors for direct starting are used as the motors. The waste heat is given off directly to the surrounding fluid via the motor housing. These motors can operated immersed in continuous duty (S1) and non-immersed in short-time duty (S2) or intermittent operation (S3).

The motors are equipped with a thermal winding monitor. This protects the motor windings against overheating. Bimetallic strips are used for this as standard. Motors in the P-version are also equipped with motor compartment monitoring. The humidity electrode signals water ingress into the motor compartment.

Furthermore, the motor can also be fitted with an external pencil electrode to monitor the sealing chamber. This signals if there is water ingress into the sealing chamber through the seal on the pump side.

The connection cable has a length of 10 m as standard and the single-phase version is equipped with a plug. The three-phase version has bare cable ends as standard and is cast as longitudinally watertight for P-version motors.

Seal

There is a sealing chamber between the motor and hydraulics. It is filled with medical white oil and protects the motor from media ingress by the seal on pump side. The pump-side and motor-side seals are provided by two mechanical seals which rotate independently of each other.

Materials

  • Motor housing: 1.4301 (motor version “S”) or EN-GJL-250 (motor version “P”)
  • Hydraulic housing: EN-GJL-250
  • Impeller: EN-GJL 250
  • Shaft end: Stainless steel 1.4021
  • Macerator: interior blade = 1.4528; external blade = Abrasite/1.4034
  • Sealing on pump side: SiC/SiC
  • Sealing on motor side: C/MgSiO4
  • Static gaskets: NBR

Scope of delivery

  • Pump
  • 10 m connection cable with plug (single-phase version) or bare cable end (three-phase version)
  • Installation and operating instructions

Accessories

  • Suspension unit or pump base
  • External electrode for monitoring the sealing chamber
  • Chains
  • Switchgears, relays and plugs
  • Fixation sets with anchor bolts