Improper Use; Product Description; Design - Wilo Rexa CUT GI-Serie Einbau- Und Betriebsanleitung

3.2

Improper use

DANGER
Explosion due to pumping of explosive fluids!
Pumping of highly flammable and explosive fluids
(gasoline, kerosene, etc.) in pure form is strictly pro-
hibited. There is a risk of fatal injury due to explosion!
The pumps are not designed for these fluids.
DANGER
Danger due to fluids hazardous to health!
If the pump is used in fluids hazardous to health, de-
contaminate the pump after dismantling and before
carrying out any other work! There is a risk of fatal in-
jury! Observe the specifications in the work regula-
tions! The operator must make sure that the person-
nel have received and read the work regulations!
The submersible pumps must not be used for pumping:
▪ Drinking water
▪ Fluids containing hard components (such as stones,
wood, metal, etc.)
▪ Fluids containing large quantities of abrasive contents
(e.g. sand, gavel)
Intended use also includes compliance with this manual.
Any other use is regarded as non-compliant with the in-
tended use.
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Product description

4.1

Design

Submersible sewage pump with internal macerator as a
submersible monobloc unit for intermittent operation in
wet well installation.
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Fig. 1: Overview
Installation and operating instructions Wilo-Rexa CUT GI
Product description
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4.1.1
4.1.2
4.1.3
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4.1.4
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Handle/attachment point
Motor housing
Seal housing
Pressure connection
Hydraulics housing
Power supply cable
Hydraulics
Centrifugal hydraulics with upstream macerator. The
macerator breaks up admixtures suitable for cutting for
transfer in a 1¼" pressure pipe or larger. The pressure
side connection is designed as a horizontal flange con-
nection.
The hydraulics are not self-priming, in other words, the
fluid must flow in either automatically or with supply
pressure.
Motor
The drive versions used are single-phase current and
three-phase current surface-cooled motors. The motor
is cooled by the fluid around it. The waste heat is trans-
ferred directly to the fluid or the ambient air via the mo-
tor housing. The motor may emerge during operation.
The connection cable is available in the following ver-
sions:
▪ Single-phase current version with shockproof plug
On AC motors, the start capacitor and operating capa-
citor is installed in a capacitor switchgear.
▪ Three-phase current version with bare cable end
Seal
The seal for the fluid and the motor compartment is
made via two mechanical seals. The sealing chamber
between the mechanical seals is filled with medical white
oil.
Material
▪ Pump housing: EN-GJL-250 (ASTM A48 Class 35/40B)
▪ Impeller: EN-GJL-250 (ASTM A48 Class 35/40B)
▪ Macerator: 1.4528 (AISI 440B+Co)
▪ Motor housing: Stainless steel AISI 1.4301 (304)
▪ Shaft: 1.4401 (AISI 316)
▪ Seal on the motor side: C/MgSiO
▪ Seal on the fluid side: SiC/SiC
▪ Seal, static: NBR (Nitrile)
en
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