Monitoring Devices - Wilo Rexa PRO Notice De Montage Et De Mise En Service

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6
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Fig. 1: Overview
4.1.1 Hydraulics
4.1.2 Motor
4.1.3 Seal
4.1.4 Material
4.1.5 Fitted accessories
4.2

Monitoring devices

146
Product description
1 Motor
1
2 Power supply cable
3 Seal housing
2
4 Pressure port
5 Suction port
6 Hydraulics housing
3
7 Handle/attachment point
4
Centrifugal hydraulics with different impeller shapes and horizontal flange connection
on the pressure side. Depending on the hydraulics, the following impeller shapes are
used:
▪ Single-channel impeller
▪ Vortex impeller
The hydraulics are not self-priming, in other words, the fluid must flow in either auto-
matically or with supply pressure.
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 transferred
directly to the fluid or the ambient air via the motor housing. The motor may emerge
during operation. Continuous duty is also possible in dry well installation depending on
the motor power.
With AC motors, the start capacitor and operating capacitor is integrated in a separate
capacitor switchgear. The connection cable is longitudinally watertight and is available
in the following versions:
▪ With plug
▪ With bare cable end
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.
▪ Pump housing: EN-GJL-250 (ASTM A48 Class 35/40B)
▪ Impeller: EN-GJL-250 (ASTM A48 Class 35/40B) or EN-GJS-500-7
(ASTM A536 70-50-05)
▪ Motor housing: EN-GJL-250 (ASTM A48 Class 35/40B)
▪ Shaft: Stainless steel AISI 1.4021 (420)
▪ Seal on the motor side: C/MgSiO
▪ Seal on the fluid side: SiC/SiC
▪ Seal, static: NBR (Nitrile)
Plug
In the "P" version, a CEE plug is attached. The plug is designed for use in commercially
available CEE sockets and is not overflow-proof.
Overview of monitoring devices:
Internal monitoring devices
Motor compartment
4
P 13
•
P 17
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WILO SE 2019-02