Download - Overview Axial Centrifugal Fans

8/13/2019 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


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


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.




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High-Efficiency Centrifugal Fans


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-


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[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





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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


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


Sandblasted, hot-dip galvanized, rubber-


up to 800 C (1 500 F).

ATEX


Special versions


Sandblasted, hot-dip galvanized, rubber-coated, stainless steel.

ATEX


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[in]

250 - 1 800

10 - 71

480 - 780

19 - 31


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




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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


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


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


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