PERFORMANCE JM Aerofoil Bifurcated Fans

JM Aerofoil Bifurcated 50Hz

JM AEROFOIL - BIFURCATED 

CONTENTS 

The Bifurcated Fan Range - Introduction 3 

Applications 4 

Specification 5 

Forms of Running, Test Methods & Quality Systems 6 

Guide To Fan Selection 7 

Bifurcated Fan - Series 33 8 

Motor Frame Size Schedules:- 

80°C Continuous 9 

200°C Contnuous 10 

Page: 

Performance Curves 

SK10751-11597 

Dimensions & Weights - Series 33 25 

Dimensions & Weights - JM 26 

Ancillaries 27-28 

2


INTRODUCTION 

Woods Air Movement Limited has made Axial flow fans for specialist applications and arduous 

environments for over 80 years. 

As an acknowledged leader within the industry we have developed a series of bifurcated cased 

axials, utilising the improved performance JM Aerofoil range and taking into account the two most 

important factors to be considered - safety and economy. 

All fans are of the highest quality, built to the latest British and International standards, and incorporating 

motors rated in accordance with BS5000 Part 99 and IEC 34-1. 

This catalogue details the range of pre-designed products available with a Bifurcated casing. 

Other product variants are available on an individual order basis, please enquire of your local 

sales office if extra information is required. (For details visit www.woods-fans.com). 

The JM AEROFOIL Bifurcated Range 

JM 

This catalogue contains the complete range of JM 

Aerofoil Bifurcated fans, either for +80°C or 

+200°C continuous operation, from 400 mm to 

800mm diameter. The impeller pitch angles are 

factory set to individual performance requirements. 

JM Series 33 

This is our range of small bifurcated fans and consists 

of 150mm, 250mm and 300mm diameters for 

temperatures of 200°C. 

For our range of continuous operation high temperature 

smoke clearance bifurcated fans please 

see Fans in Fire Safety catalogue ref: C10 or contact 

your nearest sales office. 

FANS AVAILABLE FROM 

WOODS AIR MOVEMENT 

Axial Flow Fans - 

for standard and smoke clearance applications 

Roof Units - 

for standard and smoke clearance applications 

Varofoil - variable pitch in motion fans 

Centrifugal Fans - industrial & commercial 

In Line Centrifugal 

Mixed Flow Fans 

Plate Mounted Fans 

OTHER BIFURCATED RANGES 

Large Bifurcated Range 

For higher duties there is our large J bifurcated fan 

48" (1250mm) diameter. For full details please 

enquire at your nearest sales office. 

Partnership Collection & Standard Range 

The Partnership Collection and Standard Range 

are specific products available on fast lead times 

to satisfy your requirements. Details can be found 

in publication number PC/CORP. 

Series 33 Bifurcated fan 

3


APPLICATION 

THE JM BIFURCATED FAN 

The JM Aerofoil Bifurcated fan has been developed to handle; wet or dirty atmospheres, hot gases, 

emergency smoke clearance, dust laden air. 

The motor is isolated from the main air stream by a tunnel which extends to the side of the main 

fan casing only. The motor is cooled by air directly over its carcass by means of a cooling fan 

mounted on a shaft extension at the tail end. An air splitter in the tunnel separates the incoming 

cool air from the outgoing warm air. On sizes 400 mm to 1000 mm the mouth of the tunnel is spigotted 

so that an extension duct giving access to normal atmosphere can be fitted in cases where 

the fan is mounted inside equipment, such as a drier, where air is required from another area lower 

than ambient for motor cooling. 

MOTOR COOLING 

AIR OUTLET 

TERMINAL BOX 

MOTOR COOLING 

INLET 

MOTOR PROTECTION 

TUNNEL 

AIRFLOW 

FORM B 

ONLY 

JM IMPELLER 

400/500 fl 

BIFURCATED DUCT 

COOLING FAN 

TYPICAL APPLICATIONS 

Temperature Range 

Different sizes of fan are rated for different maximum 

temperature as in the table below:- 

Maximum Temperature 

80°C 200°C 320°C* 

150 - 300 mm X X 

400 - 1000 mm X X 

*Special - made to order only 

Mists and Condensation 

The Bifurcated fan is capable of handling mists up 

to 100 % relative humidity. When there is a danger 

of vapour condensing out in the fan duct 150 mm 

to 500mm diameter fans should not be mounted 

horizontally due to their case design. All ducts 

should be laid to a slight fall to facilitate drainage. 

Dusts 

Where there is a danger of dusts building up 

around the motor of a standard axial fan the 

Bifurcated fan eliminates this problem with its 

motor out of the airstream. Care must be 

taken to maintain minimum velocities for the 

conveying of dusts in the air stream. (If the 

dust causes a change from standard air density 

(1.2 kg/m 3 ) please refer to your nearest 

sales office). 

Flammable Gases 

With the additional fitting of a spark minimising 

impeller track, the fans are suitable for Group 

2A and 2B gases. The fan must be mounted 

outside of the hazardous area. The shaft seal 

must be correctly maintained. 

Corrosive Chemicals 

The Bifurcated fan is suitable for some mild 

chemicals that will not corrode the galvanised 

casing or the seal of the motor shaft through 

the case. Additional protection can be provided 

by an epoxy paint finish. 

Please refer corrosive chemicals such as 

acids and solvents to ourselves where we can 

advise on the suitability of the fan. 

4


SPECIFICATION 

Motors 

Constructed from aluminium as standard with 

special stud and pad mounting fixings. Suitable 

for horizontal through to vertical shaft operation. 

Supplied IP55 

Insulation is Class F, with Class F temperature 

rise. 

Bearing lubricated with wide temperature range 

grease, relubricatable or sealed for life bearings 

dependant on size. 

The motor is cooled by ambient air drawn into 

the tunnel which extends to the side of the casing, 

and is suitable for continuous operation for 

up to 40°C ambient. 

Speed Control 

Woods do not offer speed control for the bifurcated 

fan by conventional electronic or autotransformer 

speed control. This is due to the 

motor construction. For inverter drive applications 

enquire at Colchester. 

Starting 

Standard three phase motors of 5.5 kW outputs 

and above are usually provided with Star/Delta 

starting connections. 

Electrical Supply 

230 V +10/-6 %; 50Hz; single phase (1φ )* 

400 V +10/-6 %; 50Hz; three phase (3φ ) 

(60Hz and other voltages are available on 

request). 

Casings 

The JM Aerofoil Bifurcated design is generally 

similar to a normal axial flow fan, but the motor 

is isolated from the main air stream by a tunnel 

which extends to the side of the fan casing. 

The casing of the 150mm to 500mm diameter 

sizes have an enlarged bore located around the 

motor to permit adequate cross sectional area 

for air to flow round the motor tunnel. The 630 

mm to 1000 mm diameter sizes have casings of 

constant diameter. 

Impellers 

Small Bifurcated 150 mm - 300 mm 

Cast aluminium silicon one piece with fixed 

aerofoil section blade. 

Large Bifurcated 400 mm - 1000 mm 

High pressure die and clamp plate, with equally 

spaced, fully adjustable, high pressure die cast 

section blades. All rotating aluminium components 

are X-ray examined prior to machining to 

ensure quality. 

Balanced to BS6861 Part 1 1987 (ISO 1940- 

1986) Grade G6.3. 

Ancillaries 

Guards to comply with BS848 Pt 5. and draft 

ISO standards. 

2 speed switch for Delta/Star reconnection 

Silencers 

Mounting feet for both horizontal and vertical 

mounting 

Matching Flanges. 

Flexible Connectors. 

Air Operated Dampers.** 

Bellmouth inlets. ** 

Vibration Isolators. 

Finish 

Standard: 

The fan casing, mounting feet, matching flanges 

and guards are all hot dipped galvanised after 

manufacture, (in accordance with BS729:1971). 

Motors, aluminium self finish, or painted to 

motor manufacturers specification. 

Non Standard: 

For more corrosive conditions the fans can be 

treated at extra cost with an epoxy paint finish. 

The maximum temperature for this finish is 

+120°C (continuous). 

Additional Extra Features 

Epoxy Paint System Finish. 

Non Standard Voltages. 

Motor Thermistors. 

Motor Thermostats or Thermal Switches. 

Motor anti-condensation Heaters. 

Spark Minimising Feature. 

* Available 150 mm - 300 mm only 

** Available 400 mm - 1000 mm only 

5


FORMS OF RUNNING, 

TEST METHODS & QUALITY SYSTEMS 

The direction of airflow through the fan and the mounting position are defined as the “Form of 

Running”. 

Woods only offer Form B running bifurcated fans as Form A fans have a marked loss in performance. 

For vertical operation add suffix “U” for airflow up, or suffix “D” for airflow down. 

Arrows indicating correct rotation and the direction of air flow are incorporated on the fan duct 

nameplate. 

Single Stage 

Form B 

Form BU 

Form BD 

Two Stage 

For Two Stage selections, please refer 

your enquiry to a Woods representative. 

Form B/B 

Testing 

The air and sound performance data has been 

measured by the latest version of British and 

International Standards:- 

ISO 5801 category D (fully ducted) method for 

testing air performance (supercedes BS848 Pt1 

1980). 

BS848 Pt 2 1985, method of noise testing. 

It is essential, when comparing fan performances, 

that the same installation category and test 

standards are used at all times. 

Acoustic Data 

The sound levels quoted are based on tests 

carried out under the Woods certified laboratory 

conditions. Using the spectrum corrections 

stated on each performance chart, an unweighted 

sound power spectrum can be obtained for 

the fan. 

Motor Ratings 

The motor ratings, starting, full load currents 

and speeds refer to the maximum output of 

the motor. When the impeller does not require 

the full output, the power and current will be 

less than the maximum quoted. 

Anechoic Test Suite at Colchester 

Quality Systems 

Woods Air Movement are committed to Quality 

Assurance. Registered to BS EN ISO 9001.94, 

N.A.T.O. Quality Standard AQAP-1 Edn 3. BS 

EN ISO 9001.94 registration means that 

Woods design is quality assured as well as the 

manufacture. 

Our commitment to Quality Assurance doesn't 

stop with the hardware. The performance data 

comes from standard tests carried out in Woods 

own laboratory which is BSI (CAME) and AMCA 

accredited. 

A JM Aerofoil Bifurcated fan can be bought with 

the confidence, as with all Woods products, that 

it will achieve the published performance data 

and match the assured quality. All the Woods 

JM Aerofoils are fitted with IP55 motors as standard, 

and come with a 2 year guarantee. 

6


GUIDE TO FAN SELECTION 

Within this publication there is all the information that you will require to make a full technical 

selection with fan, motor, electrical and acoustical details. 

The method of selection is the same as the standard JM Aerofoil fan, as detailed in our publication 

JM/SS pages 10 to 13. 

If you should require any further information or options that are not within this catalogue please 

contact your nearest sales office. 

PERFORMANCE 

JM Aerofoil Bifurcated Fans - 40JM - 100JM 

1000 

800 

600 

40JM/20/2/6 



400 



Total Pressure Pa 

200 

100 

80 

60 








40 

20 

10 

.1 .2 .3 .4 .5 .6 .7 .8 .9 1 2 3 4 5 6 7 8 10 12 14 1618 20 

Volume Flow Rate m 3 /s 

7


SERIES 33 

Fan Sizes 150 mm to 315 mm 

The Woods Series 33 Bifurcated fan of 

steelplate construction exhausts or recirculates 

fumes, gases or air at temperatures up to 

320°C. Two types are available for up to 200°C 

and up to 320°C. The fans are designed for 

continuous running while subject to that temperature. 

Standard sizes are 150 mm, 250 mm 

and 305 mm providing volumes up to 0.98 m 3 /s 

with pressures up to 490 Pa. The fan is direct 

drive by motor housed within its own compartment, 

isolating it from the airstream. Ease of 

access to the motor for maintenance purposes 

also makes the fan eminently suitable for the 

conventional axial fan's normal application. 

Motors 

All motors are totally enclosed fan cooled, Class 

F insulation with motor protection to IP54. All 

motors are supplied with sealed for life bearings. 

They are not suitable for speed regulation by 

voltage. Inverter control - please enquire. 

Electrical Data 

220-240 V / 50 Hz / 1φ 

Electrical Supply 

220 V -240 V 50Hz 1φ 

380 V - 420 V 50Hz 3φ 

Casings 

All casings are hot dipped galvanised for long life 

and high resistance corrosion. A seal is provided 

on the motor shaft. 

Impellers 

Cast in aluminium silicon alloy and has a fixed 

pitch aerofoil blade. This ensures strength, reliability 

and performance at high temperature. 

Temperature Range 

Standard 200°C, made to order 320°C. 

Ancillary Equipment 

Silencers, Mounting Feet/Plates, Vibration 

Isolators, Matching Flanges, High Temperature 

Flexible Connectors. 

380-420 V / 50 Hz / 3φ 

Product 

Code 

Speed Motor Motor 

Rating 

Full Load 

Current 

Starting 

Current 

Motor 

Rating 

Full Load 

Current 

Starting 

Current 

Sound 

Level 

(at 230 V) (at 230 V) 

(at 400 V) (at 400 V) dB(A) 

(rev/min) 

(kW) 

(A) 

(A) 

(kW) 

(A) 

(A) 

15JM.33 2900 D63 0.18 1.5 4 37 

25JM.33 1400 D63 0.12 1 3 0.18 0.63 2.5 40 

25JM.33 2900 D71 0.37 1.2 4.9 55 

30JM.33 1400 D63 0.12 1 3 0.18 0.63 2.5 46 

30JM.33 2900 D71 0.37 1.2 4.9 63 

Sound pressure levels quoted are average dB(A) at 3 m distance over a sphere, based on form B running under free field conditions, and are 

presented for comparative purposes only. Cylindrical silencers are available as standard. Bifurcated fans are not suitable for speed regulation. 

p sF - Fan (Static) Pressure (Pa) 

ft 3 /min 

m 3 /hr 

500 

400 

300 

200 

100 

80 

60 

50 

40 

30 

20 

50 

100 

500 

50 100 500 1000 

15JM.33 

2900 rev/min 


1400 rev/min 


1400 rev/min 

1000 


2900 rev/min 


2900 rev/min 

mm 

wg 

50 

40 

30 

20 

10 

8 

6 

5 

4 

3 

2 

in 

wg 

2 

1 

0.8 

0.6 

0.5 

0.4 

0.3 

0.2 

0.1 

0.08 

0.06 

0.05 

10 

0.01 0.02 0.03 0.04 0.06 0.1 0.2 0.3 0.4 0.5 0.6 0.8 1 

q v - Volume Flow (m 3 /s) 

8


Motor Frame Size Schedules: 

80°C Continuous 

400 V / 50 Hz / 3 φ 

Code 

Speed 

rev/min 

Max. Pitch 

Angle (°) 

Motor 

Motor 

Rating 

(kW) 

Full Load 

Current 

(A) 

Starting 

Current 

d.o.l. (A) 

Efficiency 

% 

Power 

Factor 

cos Ø 

40JM.BIF/16/4/5/... 1440 38 DA71MAC 0.25 0.8 3.5 66 0.69 

40 DA71MAC 0.37 1.1 4.9 69 0.71 


40 DA71MAC 0.37 1.1 4.9 69 0.71 

40JM.BIF/20/2/6/... 2950 18 F2225 1 2.6 15.2 73 0.76 

26 F2225 1.5 3.4 22 77 0.83 

32 F2225 2 4.5 30 75 0.85 

38 F2225 2.5 5.6 38 77 0.84 

40 F2225 3.1 6.6 44 78 0.86 


22 DA71MAC 0.37 1.1 4.9 69 0.71 

30 DA80MAC 0.55 1.5 6.7 70 0.76 

38 DA80MAC 0.75 2 9.9 72 0.76 


20 DA71MAC 0.37 1.1 4.9 69 0.71 

28 DA80MAC 0.55 1.5 6.7 70 0.76 

32 DA80MAC 0.75 2 9.9 72 0.76 

50JM.BIF/20/2/6/... 2950 8 F2225 1.5 3.4 22 77 0.83 

12 F2225 2 4.5 30 75 0.85 

16 F2225 2.5 5.6 38 77 0.84 

18 F2225 3.1 6.6 44 78 0.86 

24 F2229 4.3 8.4 75 86 0.86 

30 F2229 5.5 11.1 90 85 0.84 

63JM.BIF/20/6/6/... 935 30 F2265 0.55 1.7 7.6 65 0.72 

32 F2265 1 3 12.5 71 0.67 

63JM.BIF/20/4/6/... 1440 12 DA80MAC 0.75 2 9.9 72 0.76 

16 F2245 1 2.4 14 80 0.75 

28 F2245 1.8 4.1 24 82 0.77 

32 F2245 2.2 5 30 83 0.76 


20 F2265 1 3 12.5 71 0.67 

24 F2269 1.3 3.9 13 74 0.67 


12 F2245 2.2 5 30 83 0.76 

20 F2249 3.2 7 45 84 0.78 

22 F2249 3.8 7.7 45 84 0.84 

100JM.BIF/25/6/9/... 960 18 DA132SAD 3 6.7 44 86 0.76 

24 DA132MAD 4 8.6 57 87 0.78 

30 DA132MBD 5.5 11.6 80 88 0.78 

100JM.BIF/25/4/9/... 1470 8 DA132SAD 5.5 11 77 88 0.83 

12 DA132MAD 7.5 14.3 107 89 0.85 

20 DA160MAD 11 22.2 133 89 0.81 

24 DA160LAD 15 29 189 90 0.83 

Standard Range products shown in italics 

9


Motor Frame Size Schedules: 

200°C Continuous 

400 V / 50 Hz / 3 φ 

Code 

Speed 

rev/min 

Max. Pitch 

Angle (°) 

Motor 

Motor 

Rating 

(kW) 

Full Load 

Current 

(A) 

Starting 

Current 

d.o.l. (A) 

Efficiency 

% 

Power 

Factor 

cos Ø 


40JM.BIF/20/2/6/... 2950 18 F2225 1 2.6 15.2 73 0.76 

26 F2225 1.5 3.4 22 77 0.83 

32 F2225 2 4.5 30 76 0.85 


32 F2245C 0.75 1.7 10 83 0.77 


12 F2225 2 4.5 30 76 0.85 

24 F2229 4 7.8 75 86 0.86 

30 F2229 5.5 11.1 90 85 0.84 


32 F2265 1.2 3.6 15 70 0.6 

63JM.BIF/20/4/6/... 1440 10 F2245C 0.75 1.7 10 83 0.77 

16 F2245 1 2.4 14 80 0.73 

30 F2245 2 4.5 30 83 0.76 

32 F2249 3.5 7 45 84 0.84 


24 F2265 1.2 3.6 15 70 0.6 

80JM.BIF/20/4/6/... 1440 10 F2245 2 4.5 30 83 0.76 

20 F2249 3.5 7 45 84 0.84 

100JM.BIF/25/6/9/... 960 18 DA132SAD 3 6.7 44 86 0.76 

24 DA132MAD 4 8.6 57 87 0.78 

30 DA132MBD 5.5 11.6 80 88 0.78 

100JM.BIF/25/4/9/... 1470 8 DA132SAD 5.5 11 77 88 0.83 

12 DA132MAD 7.5 14.3 107 89 0.85 

20 DA160MAD 11 22.2 133 89 0.81 

24 DA160LAD 15 29 189 90 0.83 

Standard Range products shown in italics 

10

JM AEROFOILÐBIFURCATED 

Fan Code: 40JM.BIF/16/4/5/... 

400 mm 1440 rev/min 5 Blades 50 Hz 

BS 5750 Pt 1 

EN 29001 

ISO 9001 

Performance Data ISO 5801: 

Performance shown is specifically for fully ducted installations. 

0 500 1000 1500 2000 2500 3000 

0 1000 2000 3000 4000 5000 

180 

ISO 5801 

160 

V 

Type D 

0.7 

15 

0.6 

140 

120 

85 

82 

83 

0.5 

100 

80 

60 

40 

84 

82 

80 

83 

82 

84 

84 

24° 

85 

32° 

40° 

10 

5 

0.4 

0.3 

0.2 

20 

81 

16° 

0.1 

0.30 

0.25 

0.20 

0.15 

8° 

0 

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 

0.10 

24° 

0.05 

16° 

8° 

0.00 

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 

32° 

40° 

0 

0.0 

Sound Data BS848 Part 2 1985: 

Single figures on performance curves are overall inlet sound power levels, derived from measurements taken in Woods laboratory 

specifically under ducted conditions. For sound power levels in eight octave bands, apply the following corrections to the overall level.Use 

upper corrections when operating point is above shaded area, or lower corrections when operating point is below shaded area. 

Inlet Levels 

Pitch 

Octave Band Centre Frequency (Hz) 

Angle 63 125 250 500 1k 2k 4k 8k 

Outlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

8 

Ð12 

Ð16 

Ð6 

Ð6 

Ð7 

Ð10 

Ð5 

Ð5 

Ð9 

Ð7 

Ð13 

Ð11 

Ð21 

Ð18 

Ð27 

Ð23 

8 

Ð11 

Ð12 

Ð7 

Ð4 

Ð7 

Ð10 

Ð8 

Ð7 

Ð12 

Ð9 

Ð15 

Ð13 

Ð24 

Ð21 

Ð29 

Ð24 

16 

Ð13 

Ð11 

Ð9 

Ð3 

Ð6 

Ð9 

Ð4 

Ð8 

Ð10 

Ð12 

Ð15 

Ð13 

Ð23 

Ð18 

Ð29 

Ð21 

16 

Ð12 

Ð9 

Ð9 

Ð2 

Ð8 

Ð9 

Ð3 

Ð11 

Ð11 

Ð14 

Ð16 

Ð16 

Ð24 

Ð21 

Ð28 

Ð24 

24 Ð 40 

Ð6 

Ð7 

Ð5 

Ð3 

Ð9 

Ð9 

Ð9 

Ð10 

Ð11 

Ð13 

Ð14 

Ð15 

Ð18 

Ð20 

Ð21 

Ð24 

24 Ð 40 

Ð4 

Ð5 

Ð5 

Ð4 

Ð10 

Ð10 

Ð10 

Ð11 

Ð14 

Ð15 

Ð16 

Ð17 

Ð21 

Ð23 

Ð23 

Ð26 

SK10751 

06/12/96




BS 5750 Pt 1 

EN 29001 

ISO 9001 



0 500 1000 1500 2000 2500 

0 1000 2000 3000 4000 

250 

ISO 5801 

V 

Type D 

25 

1.0 

200 

20 

0.8 

150 

85 

86 

84 

83 

15 

0.6 

100 

80 

82 

85 

10 

0.4 

85 

50 

82 

80 

82 

24° 

86 

32° 

40° 

5 

0.2 

16° 

8° 

0 

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 

0.35 

0.30 

40° 

0.25 

0.20 

32° 

0.15 

0.10 

24° 

0.05 

16° 

8° 

0.00 

0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 

0 

0.0 





Inlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

Outlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

8 

Ð19 

Ð20 

Ð10 

Ð13 

Ð6 

Ð8 

Ð4 

Ð4 

Ð7 

Ð4 

Ð16 

Ð13 

Ð23 

Ð19 

Ð31 

Ð26 

8 

Ð19 

Ð18 

Ð12 

Ð13 

Ð9 

Ð7 

Ð4 

Ð4 

Ð6 

Ð5 

Ð17 

Ð14 

Ð25 

Ð19 

Ð34 

Ð26 

16 

Ð16 

Ð14 

Ð9 

Ð5 

Ð3 

Ð5 

Ð7 

Ð9 

Ð9 

Ð9 

Ð15 

Ð14 

Ð22 

Ð18 

Ð28 

Ð22 

16 

Ð14 

Ð12 

Ð6 

Ð4 

Ð7 

Ð9 

Ð6 

Ð9 

Ð8 

Ð8 

Ð15 

Ð14 

Ð21 

Ð18 

Ð28 

Ð23 

24 Ð 40 

Ð8 

Ð9 

Ð6 

Ð4 

Ð5 

Ð5 

Ð10 

Ð12 

Ð11 

Ð12 

Ð16 

Ð18 

Ð19 

Ð21 

Ð23 

Ð26 

24 Ð 40 Ð7 

Ð8 

Ð5 

Ð3 

Ð7 

Ð8 

Ð10 

Ð11 

Ð11 

Ð12 

Ð17 

Ð18 

Ð19 

Ð21 

Ð23 

Ð27 

SK10752 

06/12/96




BS 5750 Pt 1 

EN 29001 

ISO 9001 



0 1000 2000 3000 4000 5000 6000 

0 2000 4000 6000 8000 10000 

700 

ISO 5801 

600 

V 

Type D 

70 

60 

2.5 

500 

100 

98 

99 

50 

2.0 

400 

99 

95 

98 

100 

40 

1.5 

300 

200 

97 

98 

100 

101 

32° 

40° 

30 

20 

1.0 

100 

96 

16° 

24° 

10 

0.5 

0 

0.0 0.5 1.0 1.5 2.0 2.5 3.0 

2.5 

2.0 

1.5 

8° 

1.0 

24° 

0.5 

16° 

8° 

0.0 

0.0 0.5 1.0 1.5 2.0 2.5 3.0 

32° 

40° 

0 

0.0 





Inlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

Outlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

8 

Ð16 

Ð17 

Ð14 

Ð17 

Ð8 

Ð6 

Ð8 

Ð10 

Ð7 

Ð5 

Ð10 

Ð7 

Ð14 

Ð11 

Ð22 

Ð18 

8 

Ð10 

Ð10 

Ð11 

Ð12 

Ð6 

Ð4 

Ð6 

Ð10 

Ð7 

Ð8 

Ð11 

Ð9 

Ð15 

Ð13 

Ð24 

Ð21 

16 

Ð16 

Ð12 

Ð13 

Ð11 

Ð10 

Ð3 

Ð6 

Ð9 

Ð4 

Ð9 

Ð10 

Ð12 

Ð16 

Ð13 

Ð23 

Ð18 

16 

Ð11 

Ð8 

Ð12 

Ð9 

Ð9 

Ð3 

Ð8 

Ð10 

Ð3 

Ð12 

Ð11 

Ð14 

Ð16 

Ð16 

Ð24 

Ð22 

24 Ð 40 

Ð7 

Ð8 

Ð7 

Ð8 

Ð6 

Ð4 

Ð10 

Ð10 

Ð10 

Ð11 

Ð12 

Ð14 

Ð15 

Ð16 

Ð19 

Ð21 

24 Ð 40 

Ð5 

Ð5 

Ð6 

Ð6 

Ð7 

Ð5 

Ð12 

Ð11 

Ð12 

Ð12 

Ð16 

Ð16 

Ð18 

Ð18 

Ð23 

Ð24 

SK10753 

06/12/96




BS 5750 Pt 1 

EN 29001 

ISO 9001 



0 1000 2000 3000 4000 5000 6000 

0 2000 4000 6000 8000 10000 

900 

ISO 5801 

800 

700 

V 

Type D 

80 

3.5 

3.0 

102 

600 

101 

100 

99 

60 

2.5 

500 

2.0 

400 

101 

95 

98 

100 

40 

1.5 

300 

102 

40° 

97 

200 

95 

32° 

98 

24° 

100 

16° 

8° 

0 

0.0 0.5 1.0 1.5 2.0 2.5 3.0 

3.0 

2.5 

40° 

2.0 

1.5 

32° 

1.0 

24° 

0.5 

16° 

8° 

0.0 

0.0 0.5 1.0 1.5 2.0 2.5 3.0 

20 

0 

1.0 

0.5 

0.0 





Inlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

Outlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

8 

Ð19 

Ð17 

Ð21 

Ð20 

Ð12 

Ð14 

Ð8 

Ð8 

Ð5 

Ð5 

Ð8 

Ð4 

Ð17 

Ð13 

Ð24 

Ð19 

8 

Ð23 

Ð22 

Ð19 

Ð18 

Ð12 

Ð13 

Ð8 

Ð8 

Ð4 

Ð4 

Ð5 

Ð5 

Ð16 

Ð13 

Ð23 

Ð18 

16 

Ð14 

Ð11 

Ð17 

Ð15 

Ð10 

Ð6 

Ð3 

Ð5 

Ð8 

Ð10 

Ð10 

Ð9 

Ð16 

Ð14 

Ð22 

Ð18 

16 

Ð17 

Ð14 

Ð13 

Ð12 

Ð6 

Ð4 

Ð7 

Ð9 

Ð5 

Ð9 

Ð8 

Ð8 

Ð14 

Ð13 

Ð20 

Ð17 

24 Ð 40 

Ð8 

Ð8 

Ð9 

Ð10 

Ð8 

Ð5 

Ð6 

Ð6 

Ð11 

Ð13 

Ð12 

Ð12 

Ð17 

Ð19 

Ð20 

Ð22 

24 Ð 40 

Ð11 

Ð10 

Ð7 

Ð8 

Ð5 

Ð4 

Ð7 

Ð8 

Ð10 

Ð11 

Ð11 

Ð12 

Ð17 

Ð18 

Ð19 

Ð21 

SK10754 

06/12/96




BS 5750 Pt 1 

EN 29001 

ISO 9001 



0 1000 2000 3000 4000 5000 6000 

0 2000 4000 6000 8000 10000 

300 

ISO 5801 

V 

Type D 

30 

1.2 

250 

25 

1.0 

200 

91 

88 

88 

20 

0.8 

150 

90 

85 

87 

90 

15 

0.6 

100 

88 

90 

91 

32° 

40° 

10 

0.4 

50 

86 

89 

16° 

24° 

5 

0.2 

8° 

0 

0.0 0.5 1.0 1.5 2.0 2.5 3.0 

0.9 

0.8 

40° 

0.7 

0.6 

0.5 

32° 

0.4 

0.3 

24° 

0.2 

16° 

0.1 

8° 

0.0 

0.0 0.5 1.0 1.5 2.0 2.5 3.0 

0 

0.0 





Inlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

Outlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

8 

Ð12 

Ð16 

Ð6 

Ð6 

Ð7 

Ð10 

Ð5 

Ð5 

Ð9 

Ð7 

Ð13 

Ð11 

Ð21 

Ð18 

Ð27 

Ð23 

8 

Ð11 

Ð12 

Ð7 

Ð4 

Ð7 

Ð10 

Ð8 

Ð7 

Ð12 

Ð9 

Ð15 

Ð13 

Ð25 

Ð21 

Ð29 

Ð24 

16 

Ð13 

Ð11 

Ð9 

Ð3 

Ð6 

Ð9 

Ð4 

Ð9 

Ð10 

Ð12 

Ð15 

Ð13 

Ð23 

Ð18 

Ð29 

Ð21 

16 

Ð12 

Ð9 

Ð9 

Ð2 

Ð8 

Ð10 

Ð3 

Ð11 

Ð11 

Ð14 

Ð16 

Ð16 

Ð24 

Ð21 

Ð28 

Ð24 

24 Ð 40 

Ð6 

Ð7 

Ð5 

Ð3 

Ð9 

Ð10 

Ð9 

Ð10 

Ð11 

Ð13 

Ð14 

Ð15 

Ð18 

Ð20 

Ð21 

Ð24 

24 Ð 40 

Ð4 

Ð5 

Ð5 

Ð4 

Ð10 

Ð10 

Ð10 

Ð11 

Ð14 

Ð15 

Ð16 

Ð17 

Ð21 

Ð23 

Ð23 

Ð26 

SK10755 

06/12/96




BS 5750 Pt 1 

EN 29001 

ISO 9001 



0 1000 2000 3000 4000 5000 6000 

0 2000 4000 6000 8000 10000 

350 

ISO 5801 

300 

V 

Type D 

35 

30 

1.4 

1.2 

250 

89 

25 

1.0 

200 

92 

90 

20 

0.8 

91 

91 

150 

86 

88 

15 

0.6 

91 

92 

100 

88 

32° 

10 

0.4 

50 

88 

86 

24° 

5 

0.2 

16° 

8° 

0 

0.0 0.5 1.0 1.5 2.0 2.5 3.0 

0.7 

0.6 

0.5 

32° 

0.4 

0.3 

24° 

0.2 

0.1 

8° 

16° 

0.0 

0.0 0.5 1.0 1.5 2.0 2.5 3.0 

0 

0.0 





Inlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

Outlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

8 

Ð19 

Ð20 

Ð10 

Ð13 

Ð6 

Ð8 

Ð4 

Ð4 

Ð7 

Ð4 

Ð16 

Ð13 

Ð23 

Ð19 

Ð31 

Ð26 

8 

Ð19 

Ð18 

Ð12 

Ð13 

Ð9 

Ð7 

Ð4 

Ð4 

Ð7 

Ð5 

Ð17 

Ð14 

Ð25 

Ð19 

Ð34 

Ð26 

16 

Ð16 

Ð14 

Ð9 

Ð5 

Ð3 

Ð5 

Ð7 

Ð9 

Ð9 

Ð9 

Ð15 

Ð14 

Ð22 

Ð18 

Ð28 

Ð22 

16 

Ð14 

Ð12 

Ð6 

Ð4 

Ð7 

Ð9 

Ð6 

Ð9 

Ð8 

Ð8 

Ð15 

Ð14 

Ð21 

Ð18 

Ð28 

Ð23 

24 Ð 32 

Ð8 

Ð9 

Ð6 

Ð4 

Ð5 

Ð5 

Ð10 

Ð12 

Ð11 

Ð12 

Ð16 

Ð18 

Ð19 

Ð21 

Ð23 

Ð26 

24 Ð 32 

Ð7 

Ð8 

Ð5 

Ð3 

Ð7 

Ð8 

Ð10 

Ð11 

Ð11 

Ð12 

Ð17 

Ð18 

Ð19 

Ð21 

Ð23 

Ð27 

SK10756 

06/12/96




BS 5750 Pt 1 

EN 29001 

ISO 9001 



0 2000 4000 6000 8000 10000 12000 14000 

0 5000 10000 15000 20000 

1200 

ISO 5801 

V 

Type D 

120 

1000 

100 

4 

105 

800 

106 

104 

80 

3 

106 

600 

105 

101 

104 

60 

107 

40° 

2 

400 

103 

106 

32° 

40 

104 

24° 

1 

200 

102 

16° 

20 

8° 

0 

0 1 2 3 4 5 6 7 

7 

40° 

6 

5 

32° 

4 

3 

24° 

2 

1 

16° 

8° 

0 

0 1 2 3 4 5 6 7 

0 

0 





Inlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

Outlet Levels 

Pitch 


Angle 63 125 250 

SK10757 

06/12/96




BS 5750 Pt 1 

EN 29001 

ISO 9001 



0 2000 4000 6000 8000 10000 12000 

0 5000 10000 15000 20000 

1400 

ISO 5801 

1200 

V 

Type D 

140 

120 

5 

1000 

106 

100 

4 

108 

106 

800 

107 

107 

80 

3 

105 

600 

102 

60 

107 

108 

2 

400 

104 

32° 

40 

200 

104 

102 

24° 

20 

1 

16° 

8° 

0 

0 1 2 3 4 5 6 

6 

5 

32° 

4 

3 

24° 

2 

16° 

1 

8° 

0 

0 1 2 3 4 5 6 

0 

0 





Inlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

Outlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

8 

Ð19 

Ð17 

Ð21 

Ð20 

Ð12 

Ð14 

Ð8 

Ð8 

Ð5 

Ð5 

Ð8 

Ð4 

Ð17 

Ð13 

Ð24 

Ð19 

8 

Ð23 

Ð22 

Ð19 

Ð18 

Ð12 

Ð13 

Ð8 

Ð8 

Ð4 

Ð4 

Ð5 

Ð5 

Ð16 

Ð13 

Ð23 

Ð18 

16 

Ð14 

Ð11 

Ð17 

Ð15 

Ð10 

Ð6 

Ð3 

Ð5 

Ð8 

Ð10 

Ð10 

Ð9 

Ð16 

Ð14 

Ð22 

Ð18 

16 

Ð17 

Ð14 

Ð13 

Ð12 

Ð6 

Ð4 

Ð7 

Ð9 

Ð5 

Ð9 

Ð8 

Ð8 

Ð14 

Ð13 

Ð20 

Ð17 

24 Ð 32 

Ð8 

Ð8 

Ð9 

Ð10 

Ð8 

Ð6 

Ð6 

Ð6 

Ð11 

Ð13 

Ð12 

Ð13 

Ð17 

Ð19 

Ð20 

Ð22 

24 Ð 32 Ð11 

Ð10 

Ð7 

Ð8 

Ð5 

Ð4 

Ð8 

Ð8 

Ð10 

Ð11 

Ð11 

Ð12 

Ð17 

Ð18 

Ð19 

Ð21 

SK10758 

06/12/96




BS 5750 Pt 1 

EN 29001 

ISO 9001 



0 1000 2000 3000 4000 5000 6000 7000 8000 

0 2000 4000 6000 8000 10000 12000 

200 

ISO 5801 

V 

Type D 

20 

0.8 

0.7 

150 

90 

87 

86 

15 

0.6 

88 

88 

0.5 

100 

83 

84 

89 

10 

0.4 

87 

0.3 

84 

32° 

50 

83 

24° 

5 

0.2 

84 

16° 

0.1 

0 

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 

0.6 

0.5 

0.4 

8° 

0.3 

0.2 

24° 

0.1 

8° 

16° 

0.0 

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 

32° 

0 

0.0 





Inlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

Outlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

8 

Ð15 

Ð17 

Ð8 

Ð9 

Ð4 

Ð6 

Ð4 

Ð3 

Ð12 

Ð9 

Ð20 

Ð16 

Ð27 

Ð22 

Ð35 

Ð29 

8 

Ð13 

Ð14 

Ð8 

Ð8 

Ð5 

Ð7 

Ð4 

Ð4 

Ð12 

Ð10 

Ð20 

Ð16 

Ð26 

Ð21 

Ð34 

Ð28 

16 

Ð14 

Ð12 

Ð8 

Ð4 

Ð3 

Ð5 

Ð6 

Ð7 

Ð13 

Ð12 

Ð20 

Ð16 

Ð25 

Ð20 

Ð31 

Ð25 

16 

Ð11 

Ð10 

Ð6 

Ð3 

Ð4 

Ð7 

Ð6 

Ð8 

Ð12 

Ð13 

Ð18 

Ð17 

Ð24 

Ð21 

Ð30 

Ð26 

24 Ð 32 

Ð10 

Ð9 

Ð6 

Ð4 

Ð4 

Ð5 

Ð7 

Ð10 

Ð14 

Ð15 

Ð18 

Ð19 

Ð22 

Ð22 

Ð27 

Ð28 

24 Ð 32 

Ð8 

Ð7 

Ð4 

Ð3 

Ð7 

Ð7 

Ð9 

Ð10 

Ð14 

Ð15 

Ð17 

Ð19 

Ð20 

Ð22 

Ð25 

Ð27 

SK10759 

06/12/96




BS 5750 Pt 1 

EN 29001 

ISO 9001 



0 2000 4000 6000 8000 10000 12000 

0 5000 10000 15000 20000 

500 

ISO 5801 

V 

Type D 

50 

2.0 

400 

97 

40 

1.5 

300 

97 

99 

96 

99 

30 

95 

1.0 

200 

93 

100 

20 

96 

94 

32° 

100 

93 

24° 

10 

0.5 

94 

16° 

0 

0 1 2 3 4 5 6 

2.5 

2.0 

1.5 

1.0 

8° 

0.5 

16° 

8° 

0.0 

0 1 2 3 4 5 6 

24° 

32° 

0 

0.0 





Inlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

Outlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

8 

Ð19 

Ð18 

Ð11 

Ð10 

Ð8 

Ð9 

Ð5 

Ð5 

Ð7 

Ð5 

Ð17 

Ð13 

Ð23 

Ð19 

Ð31 

Ð25 

8 

Ð19 

Ð18 

Ð10 

Ð9 

Ð9 

Ð10 

Ð5 

Ð6 

Ð7 

Ð6 

Ð16 

Ð14 

Ð23 

Ð19 

Ð30 

Ð24 

16 

Ð17 

Ð14 

Ð10 

Ð5 

Ð5 

Ð7 

Ð6 

Ð8 

Ð10 

Ð10 

Ð17 

Ð15 

Ð23 

Ð19 

Ð29 

Ð23 

16 

Ð15 

Ð12 

Ð7 

Ð3 

Ð8 

Ð9 

Ð5 

Ð9 

Ð9 

Ð10 

Ð16 

Ð15 

Ð21 

Ð19 

Ð27 

Ð23 

24 Ð 32 

Ð12 

Ð11 

Ð8 

Ð4 

Ð5 

Ð5 

Ð7 

Ð10 

Ð11 

Ð12 

Ð17 

Ð18 

Ð21 

Ð21 

Ð25 

Ð25 

24 Ð 32 Ð10 

Ð8 

Ð4 

Ð3 

Ð9 

Ð8 

Ð9 

Ð11 

Ð11 

Ð13 

Ð17 

Ð17 

Ð19 

Ð21 

Ð23 

Ð25 

SK10760 

06/12/96




BS 5750 Pt 1 

EN 29001 

ISO 9001 



0 2000 4000 6000 8000 10000 12000 14000 

0 5000 10000 15000 20000 

250 

ISO 5801 

V 

Type D 

25 

1.0 

200 

92 

20 

0.8 

92 

96 

150 

89 

15 

0.6 

89 

100 

90 

89 

10 

0.4 

88 

24° 

50 

88 

16° 

5 

0.2 

8° 

0 

0 1 2 3 4 5 6 7 

1.2 

1.0 

0.8 

0.6 

0.4 

0.2 

8° 

0.0 

0 1 2 3 4 5 6 7 

16° 

24° 

0 

0.0 





Inlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

Outlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

8 

Ð16 

Ð17 

Ð7 

Ð6 

Ð4 

Ð8 

Ð5 

Ð4 

Ð12 

Ð9 

Ð20 

Ð17 

Ð26 

Ð22 

Ð33 

Ð29 

8 

Ð12 

Ð15 

Ð6 

Ð3 

Ð5 

Ð10 

Ð6 

Ð6 

Ð12 

Ð11 

Ð19 

Ð17 

Ð23 

Ð21 

Ð27 

Ð26 

16 

Ð16 

Ð15 

Ð8 

Ð4 

Ð3 

Ð5 

Ð5 

Ð7 

Ð15 

Ð14 

Ð21 

Ð18 

Ð27 

Ð22 

Ð31 

Ð27 

16 

Ð14 

Ð11 

Ð6 

Ð2 

Ð4 

Ð7 

Ð7 

Ð11 

Ð13 

Ð15 

Ð19 

Ð19 

Ð23 

Ð22 

Ð27 

Ð26 

24 Ð 24 

Ð13 

Ð11 

Ð6 

Ð5 

Ð4 

Ð4 

Ð6 

Ð9 

Ð14 

Ð15 

Ð19 

Ð19 

Ð22 

Ð22 

Ð26 

Ð27 

24 Ð 24 Ð11 

Ð7 

Ð3 

Ð4 

Ð7 

Ð6 

Ð10 

Ð11 

Ð15 

Ð15 

Ð18 

Ð19 

Ð20 

Ð21 

Ð23 

Ð25 

SK10761 

06/12/96




BS 5750 Pt 1 

EN 29001 

ISO 9001 



0 5000 10000 15000 20000 25000 

0 5000 10000 15000 20000 25000 30000 35000 40000 

600 

ISO 5801 

V 

Type D 

60 

500 

50 

2.0 

102 

400 

102 

106 

40 

1.5 

99 

300 

99 

30 

100 

99 

1.0 

200 

98 

24° 

20 

100 

98 

16° 

10 

0.5 

8° 

0 

0 2 4 6 8 10 12 

4.5 

4.0 

3.5 

3.0 

24° 

2.5 

2.0 

1.5 

16° 

1.0 

8° 

0.5 

0.0 

0 2 4 6 8 10 12 

0 

0.0 





Inlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

Outlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

8 

Ð17 

Ð15 

Ð9 

Ð6 

Ð8 

Ð11 

Ð4 

Ð6 

Ð7 

Ð6 

Ð16 

Ð13 

Ð23 

Ð20 

Ð29 

Ð25 

8 

Ð17 

Ð16 

Ð8 

Ð3 

Ð8 

Ð13 

Ð5 

Ð9 

Ð8 

Ð7 

Ð16 

Ð14 

Ð22 

Ð19 

Ð26 

Ð23 

16 

Ð18 

Ð15 

Ð10 

Ð4 

Ð7 

Ð9 

Ð4 

Ð5 

Ð11 

Ð12 

Ð19 

Ð16 

Ð24 

Ð20 

Ð30 

Ð24 

16 

Ð17 

Ð13 

Ð7 

Ð2 

Ð8 

Ð9 

Ð5 

Ð9 

Ð9 

Ð13 

Ð16 

Ð17 

Ð21 

Ð21 

Ð25 

Ð24 

24 Ð 24 

Ð14 

Ð12 

Ð8 

Ð5 

Ð6 

Ð5 

Ð4 

Ð7 

Ð10 

Ð12 

Ð17 

Ð17 

Ð20 

Ð21 

Ð25 

Ð25 

24 Ð 24 Ð13 

Ð7 

Ð3 

Ð4 

Ð9 

Ð7 

Ð8 

Ð10 

Ð12 

Ð14 

Ð17 

Ð18 

Ð19 

Ð21 

Ð22 

Ð24 

SK10762 

06/12/96




BS 5750 Pt 1 

EN 29001 

ISO 9001 



0 5000 10000 15000 20000 25000 30000 

0 10000 20000 30000 40000 50000 

350 

ISO 5801 

300 

V 

Type D 

35 

30 

1.4 

1.2 

250 

104 

100 

101 

25 

1.0 

200 

101 

20 

0.8 

97 

150 

97 

102 

15 

0.6 

24° 

100 

98 

10 

0.4 

96 

16° 

50 

5 

0.2 

8° 

0 

0 2 4 6 8 10 12 14 16 

6 

5 

4 

3 

24° 

2 

16° 

1 

8° 

0 

0 2 4 6 8 10 12 14 16 

0 

0.0 





Inlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

Outlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

8 

Ð23 

Ð21 

Ð7 

Ð3 

Ð10 

Ð10 

Ð4 

Ð8 

Ð7 

Ð8 

Ð13 

Ð12 

Ð20 

Ð17 

Ð28 

Ð23 

8 

Ð21 

Ð19 

Ð5 

Ð1 

Ð9 

Ð9 

Ð4 

Ð8 

Ð6 

Ð7 

Ð12 

Ð11 

Ð18 

Ð15 

Ð26 

Ð21 

16 

Ð19 

Ð14 

Ð9 

Ð5 

Ð6 

Ð7 

Ð3 

Ð6 

Ð10 

Ð12 

Ð15 

Ð16 

Ð22 

Ð20 

Ð29 

Ð27 

16 

Ð16 

Ð11 

Ð7 

Ð2 

Ð5 

Ð5 

Ð2 

Ð5 

Ð8 

Ð10 

Ð13 

Ð13 

Ð20 

Ð19 

Ð27 

Ð25 

24 Ð 30 

Ð14 

Ð11 

Ð7 

Ð5 

Ð6 

Ð6 

Ð4 

Ð6 

Ð11 

Ð12 

Ð16 

Ð17 

Ð20 

Ð21 

Ð25 

Ð26 

24 Ð 30 Ð11 

Ð8 

Ð7 

Ð5 

Ð5 

Ð5 

Ð4 

Ð6 

Ð10 

Ð12 

Ð15 

Ð16 

Ð19 

Ð20 

Ð22 

Ð24 

SK11596 

17/03/98




BS 5750 Pt 1 

EN 29001 

ISO 9001 



0 10000 20000 30000 40000 50000 

0 20000 40000 60000 80000 

800 

ISO 5801 

700 

V 

Type D 

80 

70 

3.0 

600 

113 

109 

110 

60 

2.5 

500 

50 

2.0 

110 

400 

106 

106 

111 

40 

1.5 

300 

24° 

30 

107 

1.0 

200 

104 

16° 

20 

100 

8° 

10 

0.5 

0 

0 5 10 15 20 25 

20 

15 

0 

0.0 

10 

24° 

5 

16° 

8° 

0 

0 5 10 15 20 25 





Inlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

Outlet Levels 

Pitch 


Angle 63 125 250 500 1k 2k 4k 8k 

8 

Ð22 

Ð19 

Ð21 

Ð19 

Ð8 

Ð4 

Ð6 

Ð9 

Ð4 

Ð6 

Ð9 

Ð8 

Ð15 

Ð13 

Ð22 

Ð19 

8 

Ð20 

Ð17 

Ð20 

Ð17 

Ð6 

Ð2 

Ð6 

Ð8 

Ð4 

Ð6 

Ð8 

Ð7 

Ð14 

Ð12 

Ð20 

Ð17 

16 

Ð18 

Ð13 

Ð20 

Ð14 

Ð9 

Ð5 

Ð3 

Ð5 

Ð6 

Ð7 

Ð11 

Ð12 

Ð17 

Ð17 

Ð24 

Ð22 

16 

Ð16 

Ð10 

Ð17 

Ð11 

Ð8 

Ð3 

Ð2 

Ð4 

Ð5 

Ð6 

Ð9 

Ð10 

Ð16 

Ð15 

Ð23 

Ð21 

24 Ð 30 

Ð13 

Ð10 

Ð15 

Ð12 

Ð7 

Ð5 

Ð4 

Ð5 

Ð7 

Ð9 

Ð13 

Ð14 

Ð18 

Ð18 

Ð21 

Ð23 

24 Ð 30 

Ð10 

Ð7 

Ð13 

Ð10 

Ð6 

Ð5 

Ð3 

Ð4 

Ð7 

Ð9 

Ð12 

Ð14 

Ð17 

Ð17 

Ð20 

Ð21 

SK11597 

17/03/98


DIMENSIONS AND WEIGHTS 

15JM.33 - 30JM.33 

S No. of holes 

¯T on H P.C.D. 

3 

C 

AIRFLOW 

¯A 

¯B 

¯D 

FORM B 

ONLY 

L crs. 

M 

Attachable feet, 

thickness 3 mm 

Entry For 

J Conduit 

K 

C 

Code Motor A B C D E H J K L M P S T Weight 

(kg) 

15JM.33 D63 152 208 610 257 1.6 184 CM20 - - - 106 4 8 15 

25JM.33 D63 254 324 489 400 2 299 CM20 409 222 254 178 8 10 21 

D71 254 324 489 400 2 299 CM20 409 222 254 178 8 10 24 

30JM.33 D63 305 375 584 470 2 349 CM20 504 273 305 203 8 10 26 

D71 305 375 584 470 2 349 CM20 504 273 305 203 8 10 28 

11


DIMENSIONS AND WEIGHTS 

40JM.Bif - 50JM.Bif 

235 

F 

Hole ¯J 



E 

P 

G 

D 

AIRFLOW 

FORM B 

ONLY 

¯B 

¯A 

L crs. 

M 

Slots in 

feet ¯N 

Attachable feet, 

thickness 3 mm 

K 

C 

D71 & D80 motors have no 

external terminal box. 

Code Motor A B C D E F G H J K L M N P Q S T 

Weight 

(kg) 

40JM.Bif D71 400 524 727 - 3 - - 450 - 641 350 400 10 250 3 8 12 61 

F2225 400 524 727 367 3 375 332 450 27 641 350 400 10 250 3 8 12 72 

D80 500 610 787 - 3 - - 560 - 691 450 500 10 315 3 12 12 78 

50JM.Bif F2225 500 610 787 408 3 375 371 560 27 691 450 500 10 315 3 12 12 83 

F2229 500 610 787 408 3 430 371 560 27 691 450 500 10 315 3 12 12 93 

63JM.Bif - 100JM.Bif 



E 

F 

Hole ¯ J 

P 

G 

D 

¯A 

¯B 

AIRFLOW 

FORM B 

ONLY 

Attachable 

feet thickness Q 

(optional extra) 

L crs. 

M 

Slots in 

feet ¯N 

K crs. 

C 

Code Motor A B C D E F G H J K L M N P Q S T 

U 

Weight 

(kg) 

63JM.Bif F2245 630 724 616 436 3 360 400 690 27 530 580 630 10 400 3 12 12 375 112 

80JM.Bif F2249 800 894 660 520 3 468 484 860 27 544 750 800 10 510 5 16 12 485 155 

D132 1000 1138 800 650 5 492 608 1070 40 720 950 1000 12 574 6 16 15 547 280 

100JM.Bif D160 1000 1138 1000 689 5 - - 1070 40 920 950 1000 12 574 6 16 15 547 355 

D180 1000 1138 1000 689 5 - - 1070 40 920 950 1000 12 574 6 16 15 547 410 

All dimensions shown in mm 

12


ANCILLARIES 

GUARDS 

TYPE I 

Impeller Side 

C 

TYPE IV 

Bellmouth & 

Motor Side 

C 

Suitable 

for fan Type C Weight 

ØA 

(kg) 

400 I 137 1.6 

400 IV 30 0.6 

500 I 137 2.0 

500 IV 30 0.7 

630 I 137 2.8 

630 IV 50 1.2 

800 I 137 3.5 

800 IV 50 1.5 

1000 I 137 5.0 

1000 IV 50 2.0 

BELLMOUTH 

C 

Suitable 

for fan C D Weight 

ØA Max. (kg) 

305 57 366 0.9 

¯D 

¯A 

400 80 480 1.5 

500 87 600 3.2 

630 108 757 4.8 

800 134 957 6.8 

Holes to match 

fan flange 

1000 167 1199 17.8 

Suitable 

for fan D E F G 

Weight (kg) 

Matching Flexible Damper 

ØA Flange Connection 

152 25 135 0.22 1.0 - 

MATCHING 

FLANGE 

D 

FLEXIBLE 

CONNECTION 

E 

DAMPER 

G 

F 

254 25 135 0.34 1.5 - 

305 25 162 0.8 2.8 - 

400 32 110 225 17 1.5 4.5 10 

500 32 110 225 75 2.0 5.5 16 

630 50 160 225 176 3.0 7.5 20 

800 50 160 225 270 3.6 9.1 27 

1000 50 160 225 345 4.6 11.6 36 

13


ANCILLARIES 

SILENCER - B (& C) TYPE 

C 

Suitable 

for fan 

ØA 

ØB 

C Length 

1Ø 2Ø 

PCD Thread 

152 210 184 M6 

Weight (kg) 

B Type C Type 

1Ø 2Ø 1Ø 2Ø 

254 299 273 M8 

PCD 

¯B 

¯A 

POD - TYPE C ONLY 

305 416 305 610 350 M8 10 16 12 18 

400 500 400 800 450 M10 15 25 18 30 

500 650 500 1000 560 M10 25 41 29 48 

Tapped Holes to 

match fan 

630 780 630 1260 690 M10 35 61 42 72 

800 1000 800 1600 860 M10 55 96 66 116 

1000 1200 1000 82 100 

The above silencers give the approximate dB(A) reductions:- 

B Type 1 diameter length - 7 to 10 dB(A) 

C Type 1 diameter length - 12 to 15 dB(A) 

For full acoustic details contact our Woods Acoustic Divsion 

Telephone: +44(0)1206 544122 

VIBRATION ISOLATORS 

2 holes ØG 

RUBBER IN SHEAR 

B 

Load 

Type 

range per 

mounting 

A B C D E F G H 

(kg) 

M27 Green 0-3 64 43 2 15 20 50 7 M6 

M7 Black 3-5 64 43 2 15 20 50 7 M6 

M25 Green 5-20 85 56 2 30 25 66 8 M8 

M25 Black 19-40 85 56 2 30 25 66 8 M8 

M200 Green 38-130 151 101 3 55 45 124 11.5 M10 

F 

A 

ØD 

Mounting screw H 

supplied 

M200 Black 90-220 151 101 3 55 45 124 11.5 M10 

C 

E 

OPEN SPRING 

Type 

Rated 

Load 

(kg) 

Deflection at 

rated load 

(mm) 

Free 

Height 

(mm) 

Base 

fixing 

centres 

(mm) 

Base 

fixing 

hole ø 

Mounting 

Screw 

30 Yellow 30 25 94 85 M8 M10 

60 Green 60 30 94 85 M8 M10 

14

Woods Air Movement Limited is represented in over 70 countries world-wide. 

See our website for details - www.woods-fans.com 

U.K. 

England 

South & South East 

Woods Air Movement Limited 

Tufnell Way 

Colchester CO4 5AR 

Telephone: +44 (0)1206 544122 

Facsimile: +44 (0)1206 574434 

E-mail: enquiry@woods-fans.com 

Wales, Midlands 

& South West England 


Waterlinks House, Richard Street 

Birmingham B7 4AA 

Telephone: +44 (0)121 359 6633 

Facsimile: +44 (0)121 359 1818 

E-mail: birmingham@woods-fans.com 

Scotland & 

North of England 


P.O. Box 142 

Manchester M60 1AQ 

Telephone: +44 (0)161 8480341 

Facsimile: +44 (0)161 8729847 

E-mail: manchester@woods-fans.com 

Europe 

Finland 

Woods Puhallin Oy 

Ruosilantie 2b 

00390 Helsinki 

Finland 

Telephone: +35 8 9 540 4770 

Facsimile: +35 8 9 540 47754 

E-mail: info@woods-puhallin.fi 

France 

Cie Française Woods 

16 Burospace 

F91572 Bievres Cedex 

France 

Telephone: +33 1 6019 5594 

Facsimile: +33 1 6019 5571 

E-mail: woodsfr@gec-france.fr 

Germany 

Woods Ventilatoren GmbH 

Siemensstrasse 16 

40 855 Ratingen 

Germany 

Telephone: +49 21 02 31068 

Facsimile: +49 21 02 39113 

E-mail: woods@t-online.de 

Italy 

Woods Italiana SpA 

Via Montenero 55/57 

20092 Cinisello Balsamo 

Milan, Italy 

Telephone: +39 02 61 86091 

Facsimile: +39 02 61 860947 

E-mail: info@woods-italiana.it 

International 

Canada 

Woods Air Movement (Canada) Limited 

401 Traders Blvd 

Unit #8, Mississauga 

Ontario L4Z 2H8 

Canada 

Telephone: +1 905 501 0211 

Facsimile: +1 905 501 0399 

Singapore 

Woods Singapore Pte 

Marconi Building 

3 Tai Seng Drive 

Singapore 535216 

Telephone: +65 3828233 

Facsimile: +65 3828200 

E-mail: francis.tan@marconi.com.sg 

USA 

American Fan Company 

2933 Symmes Road 

Fairfield 

Ohio 45014, USA 

Telephone: +1 513 874 2400 

Facsimile: +1 513 870 6249 

E-mail: af-sales@amfan-woods.com 

Due to a policy of continuous development and improvement the right is reserved to 

supply products which may differ from those illustrated and described in this publication. 

Certified dimensions will be supplied on request on receipt of order. 

© Copyright Woods Air Movement Limited. England 2000 Publication No: JM/Bif 

April 2000 (PDF)

We Bring Air to Life 

Fläkt Woods Group provides a full range of products and solutions for 

buildings ventilation, air treatment and industrial air movement 

Fläkt Woods Ltd 

Tufnell Way 

COLCHESTER, CO4 5AR 

United Kingdom 

Tel: +44 1206 544122 

Fax: +44 1206 574434 

Head office 

Sales Offices available World Wide - See our website for details 

www.flaktwoods.com 

Due to a policy of continuous development and improvement the 

right is reserved to supply products which may differ from those 

illustrated and described in this publication. Certified dimensions 

will be supplied on request on receipt of order. Year 2000 

DDJRG/JMBif

PERFORMANCE JM Aerofoil Bifurcated Fans

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