Elmo Rietschle R-WPB - Manual (Page 9)

Rietschle Thomas GmbH + Co. KG page 9 / 23
Blowers are used to transport and compress gases. Since
the rotors neither touch each other nor are in contact with
the casing, blowers are suitable for oil-free transport and
gas compression. During transport, media are not
contaminated with either abrasion particles or oil.
Standard blowers are designed to compress or exhaust air
or non-aggressive and non-explosive gases. If you may
need further assistance in using the blower with special
gases, please contact Rietschle Thomas.
Suction and discharge temperatures depend on the
compression degree. Both temperatures are stated in the
calculation of the blower set parameters. Such calculations
are included in the offers of the blower sets. In standard
blowers, the maximum temperature of the discharged
medium is 140 °C. In order to prevent the temperature from
exceeding the limit value in the discharge section (even
during the highest medium compression), the intake
medium temperature must be below 40 °C.
The suction and discharge pressures are stated on the type
plates of the blower sets and in the calculations of the
blower set parameters. The maximum permissible
differential pressure is stated on the blower type plates. The
pressure at the blower’s discharge flange is referred to as
p
v
, the pressure at the blower’s suction flange is referred to
as p
s
, and the pressure at the flange that connects the
blower set with the pipeline system is referred to as p
3
.
The following table provides oil charge volumes for
blowers:
Oil charge volumes
Oil charge
Type WPB / WVB
Drive side
[l]
Gear side
[l]
Total
[l]
120 0.07 0.1 0.17
300, 400 0.1 0.15 0.25
430, 550, 750 0.2 0.45 0.65
780, 1000, 1300 0.55 0.7 1.25
1600, 2000 0.75 1.4 2.15
3300 1.5 2.75 4.25
4000, 5000 1.4 2.6 4
6500, 7000, 8300 5 6 11
The prescribed oil is fully synthetic motor (automotive)
oil, Rietschle Thomas GEAR LUBE 150:
Use of different oils (e.g., for applications in the food-
processing industry) must be consulted with Rietschle
Thomas.
Electric motor lubrication is described in the enclosed
electric motor manual. There are no other lubrication places
in the blower sets.
The maximum temperature of the oil charges must not
exceed 120 °C (standard stabilization of the blower
bearings).
The maximum revolutions of the pulleys correspond to
those of blowers.
The used designs of the pulley guards or the acoustic
enclosures are tough enough to withstand any damage
(break-off and/or tear) caused by broken belts.
- The speed in the openings for intake and exhaust of air
from the machine hall: between 5 m/s and 10 m/s;
- The recommended speed in the pipeline: 22 m/s;
- The maximum speed in the discharge pipeline: 35 m/s;
and
- The maximum speed in the suction pipeline: 30 m/s.
If the delivery contains no blower discharge pressure
gauge, you must install it on the discharge pipeline. The
used pressure gauge must be glycerine or with an absorber
in order to ensure reliable functioning.
WARNING!
Blowers of standard types are not designed for
use in explosion-hazard environments!
The minimum ambient temperature when the blower set
operation is still stable is -20 °C. Nonetheless, blower sets
can be operated for a short time at a temperature as low as
-30 °C. Such restrictions apply particularly to the belts,
standard types of electric motors, and PVO valves. The
blower set contains no water cooling. The minimum
volume of condensate that builds up in the discharge
pipeline cannot affect the blower set operation.
Wastewater Treatment Plants
- Increasing the volume of oxygen in water and keeping
bacteria above the surface; and
- Ventilating activated sludge and detritus tanks in
wastewater treatment plants.
Pneumatic Transport
- Transporting all kinds of loose materials, granules, and
variously-grained materials.
Other Applications
- Backward rinsing of filters in water treatment plants;
- Release of material from silos (storage tanks);
- Clarification of loose materials and mixtures;
- Vacuum
transport;
- Exhaust of air from various equipment systems at an
absolute pressure of up to 500 mbar; and
- Supply of process air at a pressure of up to 1000 mbar.
The standard deliveries of blower sets contain no wiring or
control units. The basic data about the installed electric and
electronic devices are stated on their type plates and in their
accompanying documentation (manuals, connection
diagrams, etc.). The electric part supplier must ensure
conformity with the requirements of the appropriate
standards. The requirements for of equipment with electric
motors, the nominal current of which is below 16 A, were
not verified because the emission of such equipment
depends on the installation and properties of the equipment
complex where the equipment is used. If the delivery
contains a switchboard with a control unit, the unit’s basic
data are stated in separate operating instructions.
A Declaration of Conformity in accordance with the Czech
Republic’s Act No. 22/97 Coll. and the European Union
Council’s Directive No. 98/37/ES is enclosed with this
Manual.
5. O
PERATING THE MACHINE
For at least the guarantee period, you must keep
an operating diary where you record operating
dates, maintenance, inspections, and repairs.
Keeping the operating diary during the guarantee
period is a precondition for accepting guarantee
claims. This applies particularly to the checks
stated in Tables 5 and 6.
Since acoustic enclosures have the same function
as belt drive guards during machine operation,
standard blower sets placed in acoustic enclosures
are not equipped with these guards. Only
authorized persons whose familiarization with the
risk of touching rotating parts can be proved are
allowed to execute operations that are directly
related to putting the blower set into operation,
and those operations that must be performed
when the acoustic enclosure during blower set
operation.
Installation Inspection
- Check the installation of the machine and attachment of
the anchoring bolts;
- Check proper installation of all parts that could be left
unattached during installation. Check especially those parts
that could endanger the operators if they were not attached
and/or installed; and
4.5 U
SE
4.5.1 W
ORK
MEDIA
4.5.2 S
UCTION
AND DISCHARGE
TEMPERATURES
4.5.3 S
UCTION
AND DISCHARGE
PRESSURES
4.5.4 L
UBRICANT
SPECIFICATION
4.5.5
MAXIMUM
TEMPERATURES OF
THE LUBRICATING
SYSTEM
4.5.6 M
AXIMUM
SPEEDS
4.5.7 N
ECESSARY
SAFETY
EQUIPMENT
4.5.6.1 PULLEY
REVOLUTIONS
4.5.6 .2 WORK
MEDIUM SPEED
4.5.8 W
ARNING
AGAINST USE IN
THE EXPLOSION-
HAZARD
ENVIRONMENTS
4.5.9
R
ECOMMENDATIONS
FOR OPERATION AT A
TEMPERATURE OF
0
°C
AND LOWER
4.5.10 A
PPLICATION
FIELDS FOR BLOWERS
AND BLOWER SETS
4.5.11 E
LECTRIC
EQUIPMENT DATA
4.5.12
C
ERTIFICATE OF
CONFORMITY
5.1 I
NSPECTION
PRIOR TO FIRST
TURNING ON THE
BLOWER SET OR
BLOWER