norbro 40r.qxp

Norbro

Series 40R Pneumatic Actuator

Double Acting or Spring Return (Fail Safe)

Stainless steel fastenings and anodised externals

– improved aesthetics and ease of maintenance

Namur (VDI/VDE 3845) top mounting pattern –

for easy fitting and interchangeability of

switches, positioners, etc

Anodised aluminium construction –

for anti-corrosion and superior wear performance

on internal surfaces

One piece steel pinion drive with full width piston

tooth engagement – for greater operational life

Multi-spring failsafe concept ensures actuator

operation in the unlikely event of spring fracture

(spring return models)

Piston support rods with six bearings minimise

internal wear and maximise performance life

Namur (VDI/VDE 3845) end-cap solenoid mounting

pattern – facilitates interchangeability of

solenoids or direct port connections.

Balanced double rack & pinion – linear torque

curve

Position indicator – provides external

indication of valve position

Foolproof location pin for correct assembly

Compact failsafe size as per double-acting –

minimises space requirements

Blow-out proof pinion – eliminates risk of

pinion ejection even after pinion retaining

ring is removed

Corrosion protected springs – for long

service life

Unique unrestricted air flow through support

rods gives fast operation speeds as standard

– and also provides greater safety (centre

chamber cannot be pressurised with end

cap removed)

Multi-spring concept – provides variable

torque/air pressure requirements from the

same actuator by changing spring quantity

Long screws – to allow complete release of

spring energy for safe removal of end caps

when maintaining / reconfiguring springs

Mounting to the ISO 5211 pattern allows

for interchangeability of mounting kits.

Limit Stops (page 5)

Norbro Original Standard

For nearly 50 years the NORBRO Rack & Pinion actuator has

been the by-word for high performance pneumatic actuators.

Its reliability, construction quality and ease of maintenance

have established the 40R as the world’s leading quarter turn

actuator. If the requirement is long life, ease of use and ‘fit &

forget’, then the solution is NORBRO.

In addition, its modular design, allowing simple attachment of

a variety of ancillaries (e.g. solenoids, switches, sensors etc),

has made it the actuator against which all others are

measured.

The NORBRO actuator conforms to all the latest standards as

detailed in this publication.

The NORBRO without limit stops can be retrofitted without

bracket changes to replace the original NORBRO of 50 years

ago. The limit stop version (with the latest international drive

dimensions) is readily available as detailed opposite.

Norbro’s original rack and pinion actuator was the basis

for all subsequent designs.

Norbro ISO5211 European with limit stops

Recognising the increasing need for accurate rotation

adjustment on many applications within the process

industry, Norbro have developed a unique method of

providing this feature and it is now standard

on the

European (excluding UK) version of the actuator.

The design takes advantage of the moving support-rods

within the actuator and uses two stops in the endcap to

limit their travel and therefore adjust the rotation of the

actuator in both directions

The design allows for a nominal rotation of 96º providing

3º of adjustable over travel at each end of the actuator

stroke. The limit stop screws can also be used to adjust

the under travel of the actuator by 10º at each end of the

actuator stroke.

NOTE: The limit stop will only be supplied as standard

on the 40R Series, sizes 10 to 42. For 40 Series, sizes

45 and 50, please contact our Technical Sales Office.

The Norbro 40R pneumatic actuator is based on the opposed

double rack and pinion principle utilising piston support rods to

minimise friction and wear between pistons and body bore and

transfer air between the chambers of the actuator.

Double Acting Actuators

In the double acting model, compressed air is applied to Port A,

which is fed via the large bore support rod into the centre

chamber. This forces the pistons apart and turns the actuator's

output drive anti-clockwise (seen from above) for valve opening,

simultaneously venting the air in the end chambers via the second

support rod through Port B. This operation can be reversed by

supplying air into Port B for clockwise rotation (valve closing).

Spring Return Actuators

With the fail-safe spring return model, air is applied in a similar

way to Port A for anti-clockwise operation (valve opening) and the

movement of the pistons compresses the springs held in the end

chambers of the actuator. This position will be maintained until air

pressure is released when the spring force closes the pistons

together for clockwise operation (valve closing).

NOTE: With the size 05 actuator, air is supplied and vented

through the body of the actuator as its compact size makes the

use of support rods impractical.

Opening

Port A Air Supply

Port B Vent Out

Closing

Port A Air Exhaust

Port B Vent In

Operating Principle

Spring Return Actuator shown

Parts & Materials

Description Material/Finish

Parts List / Materials Specification

Body Aluminium (Extrusion) Anodised

Pinion Carbon Steel (corrosion resistant coated)

Pistons Aluminium

End Caps Aluminium Anodised

Support Rods Stainless Steel

Bearings Acetal

Description Material/Finish

‘O’ Rings Nitrile Rubber

End Cap Screws Stainless Steel

Springs Chrome Silicon Steel (corrosion resistant coated)

Position Indicator Polyethylene

Limit Stops Stainless Steel

Thread Seals Bonded Nitrile and steel (Corrosion Resistant coated)

Body

Pinion

Pistons

End Caps

Support Rods

Bearings

‘0’ Rings

End Cap Screws

Springs

Positioner Indicator

Limit Stops

Thread Seals

The torque tables detailed below provide actual torque values for

the range of actuators at typical pressure and spring

configurations. For more comprehensive sizing calculations the

Norbro sizing program should be used (available on request).

Double Acting Actuators

For a given air supply pressure the double acting actuator

provides a linear (constant) torque output throughout its rotation

(see chart below).

Spring Return Actuators

The torque output of a spring return actuator declines throughout

its rotation and therefore for both the spring and air stroke we

specify a 'start' and 'end' torque. For air pressures below 5 bar (g)

the number of springs used in the actuator may need to be

reduced to 'balance' the torque output of the spring stroke and

air stroke.

When sizing spring return actuators it is important that the

actuator has sufficient torque to open and close the valve. The

table below shows the actuator torque related to the position of

the valve for both fail closed (standard) and fail open operation.

Torque Output (Nm) – Double Acting Actuator

Actuator Operation

Valve Position

Fail Closed Fail Open

Break out from closed position Air stroke - Start Spring stroke - Start

Break in to open position Air stroke - End Spring stroke - End

Break out from open position Spring stroke - Start Air stroke - Start

Break in to closed position Spring stroke - End Air stroke - End

Size-

Operating Pressure - bar (g)

Series

2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 7.0 8.0

05-40R 78910111214

10-40R 10 13 16 19 22 25 28 31 34 40 46

15-40R 20 26 31 37 43 49 54 60 66 77 88

20-40R 37 47 57 68 78 89 99 109 120 141 162

25-40R 61 78 96 113 131 148 165 183 200 235 270

30-40R 100 129 157 186 214 243 272 300 329 386 443

33-40R 196 252 308 363 419 475 531 587 643 755 867

35-40R 240 309 377 446 515 583 652 720 789 926 1063

40-40R 383 492 602 711 821 931 1040 1149 1259 1478 1697

42-40R 665 854 1044 1234 1424 1615 1804 1993 2184 2564 2943

45-40 995 1280 1564 1847 2133 2418 2701 2984 3270 3840 4407

50-40 1539 1979 2419 2858 3299 3740 4179 4617 5058 5940 6818

Actuator Sizing

When sizing a valve, we recommend that a factor of safety is applied to

its nominal torque. Please contact technical sales for further advice.

Torque Output (Nm) – Spring Return Actuator

Size-

Number

Spring

Air Stroke

Series

Stroke

2.5 bar (g) 3.0 bar (g) 3.5 bar (g) 4.0 bar (g) 4.5 bar (g) 5.0 bar (g) 5.5 bar (g) 6.0 bar (g) 7.0 bar (g)

Springs

Start End Start End Start End Start End Start End Start End Start End Start End Start End Start End

05-40R

2 4.7 3.6 3.2 1.9 4.1 2.8 5.1 3.7 6.1 4.6

4 6 4.6 5.1 3.4 6 4.2 7 5.1

48596128

10-40R

6 12 7 10 5 12 7 15 10

8 16 10 13 6 16 9 18 11

10 20 12 16 8 19 10 22 13 27 18

4 13 8 18 13 24 18

15-40R

6 20 13 20 12 25 17 30 22

8 2617 261631213726

10 33 21 33 20 38 25 43 30 54 40

4 24 15 34 24 43 33

20-40R

6 36 24 36 22 46 31 55 40

8 4731 482957386748

10 59 38 50 27 59 36 69 46 79 55 99 73

4 43 26 55 37 72 52

25-40R

6 64 39 59 32 75 47 91 63

8 86 53 78 43 94 58 111 73

10 107 66 98 53 114 69 130 84 163 115

4 69 42 92 62 119 87

30-40R

6 103 63 98 54 125 80 151 105

8 138 84 130 72 157 98 184 123

10 172 105 163 91 190 116 217 141 270 192

4 142 91 171 113 224 163

33-40R

6 213 136 178 96 231 145 283 195

8 284 182 238 127 290 177 343 226

10 356 227 297 159 350 209 402 258 510 357

4 164 105 217 149 281 210

35-40R

6 246 158 228 132 293 193 357 254

8 328 210 304 176 369 237 433 298

10 410 263 381 220 445 281 509 342 638 463

4 281 169 345 219 447 316

40-40R

6 421 253 363 184 465 281 568 377

8 562 337 483 245 586 342 689 439

10 702 422 604 306 707 403 810 500 1015 694

4 496 293 598 372 776 540

42-40R

6 744 439 629 306 807 474 985 642

8 992 585 839 408 1017 576 1195 744

10 1240 731 1049 510 1227 678 1404 846 1761 1182

8 690 357 976 607 1242 859

12 1035 535 1064 532 1330 785

45-40 16 1380 714 1152 459 1419 711 1685 962

20 1725 892 1507 636 1773 888 2040 1140

24 2070 1071 1595 562 1861 814 2128 1066 2661 1569

8 1090 552 1510 918 1923 1307

12 1635 827 1235 403 1647 793 2059 1182

50-40 16 2180 1103 1783 667 2196 1057 2608 1446

20 2725 1379 2332 931 2745 1321 3157 1710

24 3270 1654 2469 806 2881 1196 3294 1585 4119 2364

Double Acting Actuators

Working 8.3 bar (g) Maximum. For higher pressures

Pressure contact our sales office.

Media Air or non-corrosive fluid

Temperature Standard -20°C to +100°C

range Low temperature variant -40°C to +85°C*

High temperature variant -20°C to +150°C

Operation Pinion rotates anti-clockwise when the

(viewed from) centre chamber supply port A (RHS) is

the top) pressurised (see Page 6)

Rotation Options

UK Norbro Nominal 92° total travel including nominal

1° overtravel both clockwise and anti-clockwise.

European Nominal 96° total travel including nominal

Norbro 3° adjustable overtravel and adjustable 10°

undertravel both clockwise and anti-clockwise.

Special 180°, 120° - Series 33. For further

options consult the Sales Office.

Operating Speeds (Seconds) – Actuator with no load

– using Namur Solenoid Control Valve – 5.5 bar (g)

Size-Series 05-40R 10-40R 15-40R 20-40R 25-40R 30-40R 33-40R 35-40R 40-40R 42-40R 45-40 50-40

Double Acting

0.1 0.15 0.3 0.5 0.6 1.1 2.1 2.9 3.0 7 8 19

Open and Close

Spring Return

0.1 0.15 0.3 0.5 0.6 1 1.7 2.2 3.5 4.6 6.8 10

Spring Stroke (Closed)

Spring Return

0.1 0.15 0.3 0.5 0.6 1.4 2.7 3.2 4.5 8 12 24

Air Stroke (Open)

Speeds other than those given above are obtainable if required by using additional control equipment.

NOTE: These times for the actuator are typical and can vary under actual operating conditions.

They are given as a guide only.

Air Consumption per Stroke – Actual Volume – Litres

Size-Series 05-40R 10-40R 15-40R 20-40R 25-40R 30-40R 33-40R 35-40R 40-40R 42-40R 45-40 50-40

Anti-Clockwise 0.05 0.17 0.35 0.69 1.22 1.86 3.39 3.93 6.73 12.0 13.51 23.87

Clockwise (D.A.only) 0.05 0.22 0.39 0.74 1.31 2.05 4.79 5.54 8.19 13.89 20.0 30.5

To obtain Free Air Displacement (FAD) Volume, multiply actual volumes by absolute working pressure, bar (A). The figures in the table

above are also the hydraulic volumes.

Weight – Kgs

Size-Series 05-40R 10-40R 15-40R 20-40R 25-40R 30-40R 33-40R 35-40R 40-40R 42-40R 45-40 50-40

Double Acting 0.7 1.3 2.7 4.5 7.4 11.0 22.5 26.0 43.6 71.8 97.0 138.0

Spring Return 0.8 1.6 3.1 5.5 8.4 12.0 26.0 30.0 48.6 80.6 115.0 161.0

* Please consult Technical Sales for options down to -60°C

Size 05

European and original, Norbro actuator with F03 ISO5211 45º square (F03 DIN3337)

Sizes 10-42

European actuator with ISO5211 45º square (DIN3337)

Actuator

Size

ISO

5211

A B C D E F G H J K L M N P R

10 F04 80.0 30.0 73.0 31.8 M5x5 M5x8 42.0 90.4 43.1 155.3 48.6 76.8 85.5 20.0 42.8

15 F05 80.0 30.0 73.0 31.8 M5x5 M6x9 50.0 114.3 52.0 195.2 55.6 94.0 104.0 20.0 52.0

20 F07 80.0 30.0 107.2 49.2 M6x6 M8x12 70.0 139.7 66.0 235.4 74.3 116.0 125.0 20.0 62.5

25 F07 80.0 30.0 107.2 49.2 M6x9 M8x12 70.0 158.0 78.0 271.0 83.3 135.5 146.6 30.0 73.3

30 F10 80.0 30.0 161.1 73.0 M6x9 M10x15 102.0 190.0 90.0 326.0 100.3 155.0 167.5 30.0 83.8

33 F12 80.0 30.0 161.1 86.0 M8x12 M12x18 125.0 228.0 120.0 398.5 127.0 206.0 214.0 30.0 107.0

35 F12 80.0 30.0 212.8 101.6 M8x12 M12x18 125.0 249.3 123.0 423.9 145.0 213.0 217.0 30.0 108.5

40 F14 130.0 30.0 243.6 117.5 M10x15 M16x24 140.0 297.8 144.0 511.8 137.5 244.9 276.0 50.0 149.0

42 F16 130.0 30.0 - - - M20x30 165.0 363.4 172.0 619.7 165.0 283.0 316.0 50.0 170.0

Sizes 10-42

Original Norbro Pattern with Norbro Square and ISO5211 mounting

Actuator

Size

S T V W X Y AA BB CC DD EE FF

10 23.3 3.0 30.0 23.0 11.11/11.00 14.1 12.0 15.0 9.13/9.00 15.2 21.5 G1/8

15 26.0 3.0 35.0 26.0 14.11/14.00 18.1 16.0 16.0 12.70/12.57 13.1 26.0 G1/4

20 33.3 3.0 55.0 33.0 17.11/17.00 22.2 19.0 20.3 12.70/12.57 13.0 30.5 G1/4

25 41.4 3.0 55.0 42.0 17.11/17.00 22.2 19.0 25.1 19.05/18.92 21.2 33.5 G1/4

30 48.2 3.0 70.0 48.0 22.13/22.00 28.2 24.0 28.6 22.23/22.10 20.9 34.5 G1/4

33 52.3 3.0 85.0 55.0 27.13/27.00 36.2 29.0 36.5 28.58/28.45 20.2 45.0 G1/4

35 58.1 3.0 85.0 61.0 27.13/27.00 36.2 29.0 36.5 28.58/28.45 19.9 43.0 G1/4

40 66.5 3.5 100.0 72.0 36.16/36.00 48.2 38.0 45.7 34.93/34.80 37.0 46.6 G1/4

42 88.9 4.0 130.0 90.0 46.16/46.00 60.2 48.0 66.7 50.80/50.67 34.5 58.0 G1/4

Actuator

Size

GG HH JJ

10 11.23/11.10 15.0 13.8

15 14.40/14.27 19.0 17.8

20 14.40/14.27 19.0 17.8

25 19.18/19.05 27.0 23.8

30 19.18/19.05 27.0 23.8

33 25.53/25.40 33.0 31.8

35 25.53/25.40 33.0 31.8

40 28.70/28.57 40.0 35.8

42 46.16/46.00 50.0 57.6

Sizes 45 & 50

European actuator with ISO5211 45º square (DIN3337)

Actuator

Size

ISO

5211

A B C D E F G H J K L M N P

45 F16 130.0 30.0 330.2 158.7 M16x24 M20x30 165.0 (x4 holes) 363.3 575.9 186.1 334.9 341.6 50.0 170.8

50 F25 130.0 30.0 393.7 190.5 M16x24 M16x24 254.0 (x8 holes) 426.1 626.0 226.6 387.5 393.7 50.0 196.8

Actuator

Size

R S T V W X AA BB CC DD EE FF

45 88.9 4.8 130.0 104.0 46.16/46.00 60.2 48.0 50.80/50.67 69.7 34.5 73.0 32.5

50 95.2 4.8 200.0 120.0 55.19/55.00 72.2 57.0 57.15/57.02 76.0 32.8 82.4 30.5

Sizes 45 & 50

Original Norbro Pattern with Norbro Square and mounting

(Note: has no ISO5211 adaptor plate.)

Flowserve Flow Control

A Division of Flowserve GB Ltd

Burrell Road, Haywards Heath

West Sussex RH16 1TL

United Kingdom

Telephone: +44 (0)1444 314400

Telefax: +44 (0)1444 314401

Email: [email protected]

To find your local Flowserve representative:

For more information about Flowserve Corporation,

visit www.flowserve.com or call USA 1 800 225 6989

Due to continuous development of our product range, we reserve the right to alter the dimensions and information contained in this leaflet as required.

Information given in this leaflet is made in good faith and based upon specific testing but does not, however, constitute a guarantee.

Basic Coding on Norbro 40R Pneumatic Actuators

(For full details of 40R coding and 40 Series coding please contact Technical Sales Office)

Variants

Norbro’s Series 61 two-stage

actuator is designed for drum

filling applications.

The Series 33 180° actuator

provides the perfect solution for

Worcester’s range of

multi-ported valves.

RDB 40

1 S D MN0

Size

Operation

A = Double acting

B = 10 springs (4 size 05)

C = 8 springs

D = 6 springs

E = 4 springs

F = 2 springs (05 only)

Temperature

S = Standard

H = High

L = Low

End Cap Options

B = Blank

1 = J switch

M = Limit stops

O = 05 Actuator

Pinion

E = Norbro Drive 0º imperial

N = European diagonal

ISO 5211 45° square drive

(DIN3337)

FCD NBEBR0003-01 Printed in Germany. (Replaces PB29 Rev 08/04)