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Overview Axial Centrifugal Fans

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    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).

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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

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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

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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

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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

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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

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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

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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

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    based on measurements, computation,

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    Analysis, simulation, optimization.

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