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8/13/2019 Overview Axial Centrifugal Fans
1/8
Axia
l
Centrifugal
Tangential
LTGHigh-Efficiency
Fans
LTG Engineering Services
Customized solutions for products and techniques.Analysis, simulation, optimization.
LTG High-EfficiencyAxial and Centrifugal Fans
For Industrial Applications, Process Airand Room Air Technology.
High flow rate, high total pressure,temperature range up to 800 C (1 500 F).
8/13/2019 Overview Axial Centrifugal Fans
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Optimum aerodynamic
characteristics
Minimized intake loss thanks to spe-
cially shaped intake nozzles, low
clearance loss between impeller and
housing.
High degree of efficiency
Up to 89 % in the optimum range.
Characteristic curve
with limit rating
No motor overload under operating
conditions differing from optimum de-
sign range.
Smooth running
Impeller is dynamically balanced in-
cluding hub and shaft.
Means of control
Speed controlled actuators, adjust-
able inlet guide vane, adjustable pitch
blade.
Robust construction
Design offering high operational safe-
ty, sturdy, torsion resistant steel hous-
ing, welded, bolted and painted. Long
service life of bearings.
ATEX explosion protected ver-
sions available.
For use under extreme conditions
Process temperatures up to 800 C
(1 500 F), for chemically aggressive
gases as well as abrasive dusts and
fibers.
Customized solutions
Advantages ofLTG High-Efficiency Axial and Centrifugal Fans
Flow-through principle axial fans
High flow rate
Axial fan type VAN
LTG High-Efficiency Axial and Centrifugal Fans
8/13/2019 Overview Axial Centrifugal Fans
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Depending on the type of application,
a fan has to meet a variety of require-
ments. Selection criteria may include the
following:
Required flow rate
Overall external pressure
Power input
Degree of efficiency
Space required
Means of control
LTG has developed a wide range of types
offering the right fan for any application.
It ranges from low to high pressure fans,
including the perfect fan type with suit-
able performance characteristic for any
given operating point.
LTG offers standard models and specifi-
cally designed models to meet given in-
stallation requirements or for integration
into existing systems.
Based on customer requirements, LTG
high-efficiency fans are designed e.g. for
use in process engineering, the chemi-
cal industry, ventilation engineering and
mechanical engineering. Materials are
selected in compliance with the indi-
vidual application. Standard models are
made of welded sheet steel and surface
finished using a protective paint. For
increased chemical, thermal, and abra-sion resistance we offer special finishes,
coatings, and materials such as cor-
rosion and acid resistant steel or light
metal alloys and high-strength antiwear
surface finishes.
Flow-through principle
centrifugal fans, double sided intake
High total pressure
Centrifugal fan type VRR
LTG High-Efficiency Axial and Centrifugal Fans
8/13/2019 Overview Axial Centrifugal Fans
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Computational Airflow Simulation
Using specific simulation tools (CFD) the
flow path through or alongside machines
and installations is calculated, visual-
ized, and optimized. It can dramatically
reduce the fluid mechanical design time.
Engineering parameters can be directly
transferred.
Experimental Airflow Visualization
Making airflow visible helps to show the
flow within processes or to confirm com-
putational simulation results.
LTG Engineering ServicesLTG Aktiengesellschaft with its
experts and sophisticated, up-to-date
R&D lab offers everything to provide
solutions to process air technology
challenges.
Analysis, simulation, optimization of
flow processes
Flow optimization technology based on
CFD simulation, e.g. for the flow path
in a machinery or installation Experimental measurements, e.g. to
optimize effectiveness
Customized solutions
Customer-specific Design
Example: Airflow Simulation System
A complete air flow simulation system
was integrated in the tight space of an
existing test lab. It is used for aero-acou-
stical analysis under real and exact re-
producible test parameters. Maintaining
tight tolerances of the airflow prof ile and
the turbulance rate allows for exact veri-
fication of the test results.
The outlet velocity and outlet area can
be modified to match customers specific
requirements.
LTG High-Efficiency Axial and Centrifugal FansLTG offers a wide range of fans for industrial
applications, process air and room air technology
8/13/2019 Overview Axial Centrifugal Fans
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High-Efficiency Axial Fans
For gaseous media with low particles content
Type VAN
Welded steel housing. Blade made from
high-alloy cast aluminum, for highest cir-
cumferential speeds and optimum effec-
tiveness. Shaped impeller blades. With
optimized air intake nozzle for chamber
installation.
Type VAH
Welded steel housing. Blade made from
high-alloy cast aluminum, for highest cir-cumferential speeds and increased pres-
sure levels, maintaining optimum effec-
tiveness. Shaped impeller blades. With
optimized air intake nozzle for chamber
installation.
Type VAR
Welded steel housing. Blade made from
high-alloy cast aluminum, for highest
circumferential speeds and optimum ef-
fectiveness. Shaped impeller blades, ad-
justable at standstill. With optimized air
intake nozzle for chamber installation or
with flange for pipe installation.
Special versions
Special anticorrosive version:Sandblasted, hot-dip galvanized, rubber-
coated, stainless steel. Hot-gas version
up to 200 C (390 F).
ATEX
explosion protection.
Axial fan type VAN
Accessories
Diffuser
Inlet guard
V-belt or flat belt drive
Belt guard
Baseframe
Vibration isolation
Resilient coupling on discharge side
Counter-flange on discharge side
Motor slide rails
Axial fan type VAR
Series VAN VAR VAH
Pressure range Low pressure Medium pressure High pressure
Flow rate [m3/h]
Flow rate [cfm]
30 000 - 450 000
17 500 - 265 000
10 000 - 270 000
6 000 - 15 900
30 000 - 450 000
17 500 - 265 000
Max. total press. [Pa] / ["wg] 1 200 / 4.8 2 300 / 9.2 3 300 / 13.2
Impeller diameter [mm]
Impeller diameter [in]
1 000 - 2 800
39 - 110
800 - 1 400
32 - 55
1 250 - 2 800
49 - 110
With belt drive or direct drive available.
LTG High-Efficiency Axial and Centrifugal FansLTG offers a wide range of fans for industrial
applications, process air and room air technology
8/13/2019 Overview Axial Centrifugal Fans
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High-Efficiency Centrifugal Fans
For gaseous media with low particles content
Type VRK
Bolted rectangular housing. Welded im-
peller with optimized air intake nozzle
and cover plate. Backward curved impel-
ler blades. One side completely open for
use as air outlet resulting in low dynamic
pressure loss and about 25 % saved pow-
er input compared to squirrel cage impel-
lers. Compact dimensions. Low noise.
Stable pressure characteristics. No mo-
tor overload in case of varying installationresistance.
Type VRS
Stable welded spiral housing. Welded
impeller with optimized air inlet bell and
cover plate. Backward curved blades.
High degree of efficiency and compact
dimensions, even at high conveying pres-
sures. Steady pressure characteristics
with possibility of unlimited throttling and
parallel operation.
Type VSR- ..H
Stable welded spiral housing. Weldedimpeller for highest tip speeds and high-
est pressure levels at optimum efficiency.
Backward curved blades. For high de-
grees of efficiency and increased con-
veying pressures. Suitable for direct duct
connection.
Accessories
Inlet guard
V-belt or flat belt drive
Belt guard
Baseframe
Vibration insulation
Resilient coupling on discharge side
Counter-flange on discharge side
Motor slide rails
Motor support
Special versions
Special anticorrosive version:
Sandblasted, hot-dip galvanized, rubber-
coated, stainless steel. Hot-gas version
up to 800 C (1 500 F).
ATEXexplosion protection.
Impeller designs
Centrifugal fan type VSR-M..
Series VRK VSR-NDH VRS VSR-MDH VSR-HDH
Pressure range Low pressure Low pressure Medium pressure Medium pressure High pressure
Flow rate [m3/h]
Flow rate [cfm]
1 000 - 100 000
590 - 59 000
1 600 - 200 000
9 500 - 118 000
3 500 - 200 000
2 100 - 118 000
3 000 - 125 000
1 800 - 73 600
400 - 100 000
240 - 59 000
Max. total press. [Pa] / ["wg] 2 000 / 8 3 300 / 13.2 4 500 / 18 7 500 / 30 16 000 / 64
Impeller diameter [mm]
Impeller diameter[in]
280 - 1 000
11 - 39
315 - 1 600
12 - 63
450 - 1 250
18 - 49
450 - 2 000
18 - 79
350 - 2 000
14 - 79
With belt drive or direct drive available.
LTG High-Efficiency Axial and Centrifugal FansLTG offers a wide range of fans for industrial
applications, process air and room air technology
8/13/2019 Overview Axial Centrifugal Fans
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Belt drive
with motor base
Belt drive
with base frame
Direct drive
with flange motor
Direct drive with coupling
and possibly cooling disc
(for hot-gas applications)
Direct drive
with motor base
High-Efficiency Material Handling Fans
For gaseous media with high particles content
High-Efficiency Combustion Air Fans
For gaseous media with low particles content
Type VRA
Stable welded spiral housing. Welded im-
peller of high-alloy aluminum. Backwardscurved impeller blades. With insulated
suction box for low-noise operation. With
attached air intake filter for extended gas
burner maintenance intervals.
Type VSR/VRR
Stable welded spiral housing. Welded
open material handling impeller without
cover plate, with optimized protection
against wear for extended service life.
Reinforced, backward curved impeller
blades. Optimized for conveying fibers
and trim.
Special versions
Special anticorrosive version:
Sandblasted, hot-dip galvanized, rubber-
coated, stainless steel. Hot-gas version
up to 800 C (1 500 F).
ATEX
explosion protection.
Special versions
Special anticorrosive version:
Sandblasted, hot-dip galvanized, rubber-coated, stainless steel.
ATEX
explosion protection.
Material handling fan type VRR
Series VSR-MD VRR
Pressure range Medium pressure High pressure
Flow rate [m3/h]
Flow rate [cfm]
700 - 100 000
410 - 59 000
400 - 4 500
240 - 2 700
Max. total press. [Pa] / ["wg] 5 500 / 22 11 500 / 46
Impeller diameter [mm]
Impeller diameter[in]
250 - 1 800
10 - 71
480 - 780
19 - 31
With belt drive or direct drive available.
Series VRA-53 VRA-54 VRA-55 VRA-56
Flow rate [m3/h]
Flow rate [cfm]
150 - 3 500
90 - 2 100
200 - 6 300
120 - 3 700
200 - 5 500
120 - 3 240
200 - 4 500
120 - 2 650
Max. total press. [Pa] / ["wg] 6 000 / 24 8 000 / 32 10 000 / 40 13 000 / 52
Impeller diameter [mm] / [in] 560 / 22 680 / 27 780 / 31 880 / 35
With direct drive available.
Combustion air fan type VRADrive options
LTG High-Efficiency Axial and Centrifugal FansLTG offers a wide range of fans for industrial
applications, process air and room air technology
8/13/2019 Overview Axial Centrifugal Fans
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401-52-pdf (0509)
Printed on chlorine-free bleached paper.
Subject to technical alterations.
LTG Aktiengesellschaft, Stuttgart
LTG AktiengesellschaftGrenzstrae 7 D-70435 Stuttgart
POB 400525 D-70405 Stuttgart
y +49 (711) 82 01-0
Fax +49 (711) 82 01-696
Internet: www.LTG-AG.de
E-Mail: [email protected]
LTG S.r.l. con socio unicoVia G. Leopardi, 10 I-20066 Melzo
y +39 (02) 9 55 05 35
Fax +39 (02) 9 55 08 28Internet: www.LTG-SRL.com
E-Mail: [email protected]
LTG Incorporated105 Corporate Drive, Suite E
Spartanburg, SC 29303
y +1 (864) 5 99-63 40
Fax +1 (864) 5 99-63 44
Internet: www.LTG-INC.net
E-Mail: [email protected]
Components for
Process Air TechnologyJapan
Toho Engineering Co., Ltd.
14-11, Shimizu 3-Chome, Kita-Ku
Japan-462 Nagoya
y +81 (52) 9 91-10 40
Fax +81 (52) 9 14-98 22
Internet: www.tohoeng.com
E-Mail: [email protected]
The Program for
Process Air Technology
Key Components
Axial, centrifugal and tangential fans
Fahrtwind Simulators
LTG Filtration Technology: Suction noz-
zles Fans Dampers Filters Separa-
tors Compactors
LTG Humidification Technology: Air Hu-
midifiers Product Humidifiers
The Program for
Air Conditioning Technology
Key Components
Air diffusers for ceilings, walls and f loors:
Linear diffusers, displacement air dif fus-
ers, swirl diffusers LTG chilled beam cool
wave Induction units Fan coil units
Decentralized ventilation units Flow rate
controllers labairsystem: Components
for lab ventilation
Engineering ServicesTechnical services for investors, archi-
tects, engineers and plant builders dur-
ing design, construction and operation of
buildings.
Reliable and precise data relating to the
ventilation or air conditioning system
are given before the project is realized,
based on measurements, computation,
building simulations, and experiments.
Engineering ServicesTechnical services during development
and operation of assembly groups, ma-
chines and plants.
Analysis, simulation, optimization.
Customized solutions.
Mobile Filtration Lab / Filter engineering
on site.
Leader in Technology. Since 1924.