Product description
en
Installation and operating instructions Wilo-Rexa UNI
9
CAUTION
Use in biogas applications forbidden!
The fluids in biogas applications are highly aggressive.
These fluids will destroy the pump. Use with these
fluids is strictly forbidden!
The submersible pumps
must not be used
for pumping of:
ƒ
Drinking water
ƒ
Fluids containing hard components (such as stones, wood,
metal, etc.)
ƒ
Fluids containing high quantities of abrasive contents (e.g.
sand, gravel).
Intended use requires compliance with this manual. Any other use
is regarded as non-compliant with the intended use.
4
Product description
4.1
Design
Submersible sewage pump as a submersible monobloc unit for in-
termittent operation for wet well installation.
4
5
6
1
2
3
Fig. 1:
Overview
1
Handle/attachment point
2
Motor housing
3
Hydraulics housing
4
Pressure port
5
Pump support foot, integrated in hydraulics housing
6
Power supply cable
4.1.1
Hydraulics
Rotodynamic hydraulics with vortex impeller and horizontal flange
connection on the pressure side. The screwed connection is in-
tegrated in the pressure port.
The hydraulics are
not
self-priming, in other words, the fluid must
flow in either automatically or with supply pressure.
NOTICE
Combined connection for DN 50 and DN 65!
The Rexa UNI V06 is equipped with a DN 50/65 com-
bined connection. The factory setting of the connec-
tion is DN 65. To use the pump with a DN 50 connec-
tion, press the nuts in the flange inwards onto the
small hole circle. The flange can be reset to DN 65 at
any time!
4.1.2
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 transferred directly to the fluid via the
motor housing. The motor may emerge during operation.
With single-phase current motors, the operating capacitor is in-
tegrated in the motor. The connection cable is available in the fol-
lowing versions:
ƒ
Single-phase current version:
–
With shockproof plug
–
With shockproof plug and fitted with a float switch
ƒ
Three-phase current version:
–
With bare cable end
–
With CEE plug and fitted with a float switch
4.1.3
Seal
Different designs are used for the seal to the fluid and the motor
compartment:
ƒ
Rexa UNI V05: A rotary shaft seal is used on the motor side, a
mechanical seal is used on the fluid side.
ƒ
Rexa UNI V06: A mechanical seal is used on the motor side and
the fluid side.
The sealing chamber between both seals is filled with medical
white oil.
4.1.4
Material
ƒ
Pump housing: PP-GF30
ƒ
Impeller: PP-GF30
ƒ
Motor housing: 1.4301 (AISI 304)
ƒ
Shaft: 1.4401 (AISI 316)
ƒ
Seal on the fluid side: SiC/SiC
ƒ
Seal on the motor side: NBR (nitrile) (V05), C/Cr (V06)
ƒ
Static seal: NBR (nitrile)
NOTICE! In material version “B”, all parts that come in contact
with the fluid are made of stainless steel 1.4401 (AISI 316).
