Norbro

Series 40R Pneumatic Actuator

Double Acting or Spring Return

Norbro
Series 40R

Since the mid-Sixties the Norbro name has been recognised as the leading
quarter turn actuator for industry.
As proof of this, Norbro pneumatic actuators can be found in a range of
applications as diverse as the petrochemical industry, food and beverage,
steel production, pharmaceuticals and plastics manufacturing.

Anodised aluminium construction

for anti-corrosion and superior wear
performance on internal surfaces

Namur (VDI/VDE) top mounting pattern

for easy fitting and interchangeability of
switches, positioners, etc.

From the very beginning Norbro has been dedicated to providing high
performance actuators which combine reliability, long life and ease of
maintenance with operational safety and a modular design concept which
allows simple attachment of a variety of ancillaries to match customer
requirements.
With the latest design of the Norbro Series 40R, all of these factors add up to
providing you with the finest pneumatic actuator available today.
Position indicator provides external
indication of valve position
Foolproof location pin for correct end-cap
assembly

Stainless steel fastenings and anodised externals

improved aesthetics and ease of maintenance

Compact failsafe same size as double-acting

minimises space requirements

One piece steel pinion drive with full width piston

tooth engagement for greater operational life

Blow-out proof pinion eliminates risk of

pinion ejection even after pinion retaining
ring is removed

Multi-spring failsafe concept ensures

actuator operation in the unlikely event
of spring fracture

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 caps removed)

Piston support rods with six bearings minimise

internal wear and maximise performance life

Namur (VDI/VDE) end-cap solenoid mounting

pattern facilitates interchangeability of solenoids

Multi-spring concept provides variable torque/air

pressure requirements from the same actuator

Balanced double rack & pinion

eliminates side loads

Long screws to allow complete release of

spring energy for safe removal of end caps
when reconfiguring springs

Other Features and Benefits

Large range of sizes

For more efficient torque matching

Failsafe operation in a fire

Polished support rods retain fire-safe capability even if bearings are fire damaged

Option for reversible direction of operation

For failsafe open capability on butterfly valves

No special tools required for maintenance

Simple to maintain

Standard operating temperature range of -20C to +100C

Increased applications

All parts sealed and greased for life

No lubricated air supply required

Mounting to the ISO 5211 pattern allows

for interchangeability of mounting kits.

Norbro
Series 40R

Operating Principle
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.
In the double acting model, compressed air is applied to Port 1 which is fed via the large bore
support rod into the centre chamber. This forces the pistons apart and turns the actuators
output drive anti-clockwise (seen from above) for valve opening, simultaneously venting the
air in the end chamber via the second support rod through Port 2. This operation can then
be reversed by supplying air into Port 2 for clockwise rotation (valve closing).
With the fail-safe spring return model, air is applied in a similar way to Port 1 for anti-clockwise operation (valve opening) and this position will be maintained until air pressure is
released when 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.

PORT 1
AIR SUPPLY

PORT 2
VENT OUT

OPENING

PORT 1
AIR EXHAUST

PORT 2
VENT IN

CLOSING

Norbro
Series 40R

10

3
4

5
7

Parts List / Materials Specification

Item No.

Description

Material/Finish

Body

Aluminium (Extrusion) Anodised

Pinion

Carbon Steel (Corrosion Resistant Coated)

Pistons

Aluminium

End Caps

Aluminium Anodised

Support Rods

Stainless Steel

Bearings

Acetal

O Rings

Nitrile Rubber

End Cap Screws

Stainless Steel

Springs

Chrome Silicon Steel (Corrosion Resistant Coated)

10

Position Indicator

Polyethylene

Norbro
Series 40R

Actuator sizing
There are twelve sizes of Norbro double acting or fail safe spring return pneumatic
actuators providing a torque range of 11 to 4617 Nm (at an operating pressure of 5.5 bar).
This enables efficient and therefore economical torque matching.
The torque tables detailed below provide actual torque values for the range of actuators at
typical pressure and spring configurations.
When sizing a valve, we recommend that a factor of safety is applied to its nominal
torque.
Alternatively, for more comprehensive sizing calculations, the Norbro/Worcester
Actuator/Valve sizing program should be used (available on request).

Torque output (Nm) Double Acting Actuator

OPERATING PRESSURE (bar)
SizeSeries

2.0

2.5

3.0

05-40R

3.5

4.0

4.5

5.0

5.5

6.0

7.0

9.1

10.2

11.2

12.3

14.4

8.0

10-40R

10.4

13.4

16.3

19.3

22.3

25.2

28.2

31.1

34.1

40

46

15-40R

19.9

25.6

31.3

37

42.7

48.5

54.1

59.8

65.5

77

88.3

20-40R

36.5

46.9

57.4

67.7

78.2

88.7

99.1

109

120

141

162

25-40R

60.9

78.3

95.7

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

Norbro
Series 40R
Torque Output (Nm) Spring Return Actuator
SizeSeries

05-40R
10-40R

15-40R

20-40R

25-40R

30-40R

33-40R

35-40R

40-40R

42-40R

45-40

50-40

OPERATING PRESSURE (bar)

Spring
Number
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
7.0
Torque
of
Springs Start End Start End Start End Start End Start End Start End Start End Start End Start End Start End

2*
4
4
6
8
10
4
6
8
10
4
6
8
10
4
6
8
10
4
6
8
10
4
6
8
10
4
6
8
10
4
6
8
10
4
6
8
10
8
12
16
20
24
8
12
16
20
24

4.7 3.6
6 4.6
7.9 4.7 9.2 5.7
11.9 7.1
15.8 9.5
19.8 11.8
13 8.4 18.3 12.9
19.5 12.6
26.1 16.8
32.6 21
23.7 15.3 33.6 23.8
35.6 23.9
47.4 30.7
59.3 38.3
42.8 26.2 55.4 36.7
64.2 39.3
85.6 52.5
107 65.6
68.8 42 91.9 61.5
103 63.1
138 84.1
172 105
142 90.8 171 113
213 136
284 182
356 227
164 105 217 149
246 158
328 210
410 263
281 169 345 219
421 253
562 337
702 422
496 293 598 372
744 439
992 585
1240 731
690 357 976 607
1035 535
1380 714
1725 892
2070 1071
1090 552 1510 918
1635 827 1235 403
2180 1103
2725 1379
3270 1654

3.2 1.9 4.1 2.8 5.1 3.7

6.1 4.6
5.1 3.4

6 4.2 7 5.1
11.7 8.3
9.6 4.5 12.4 7.2 15.2 9.8
12.8 6.1 15.6 8.7 18.4 11.3
16 7.6 18.8 10.2 21.6 12.8 27.1 18.1
23.7 18
19.5 11.8 24.8 16.9 30.1 21.9
25.9 15.8 31.3 20.8 36.6 25.8
32.5 19.7 37.8 24.8 43.1 29.8 53.8 39.9
43.3 33
35.7 21.8 45.4 31 55.2 40.3
47.5 29.1 57.3 38.3 67.1 47.5
49.7 27.1 59.4 36.3 69.2 45.6 79 54.8 98.5 73.3
71.7 52
58.6 31.9 74.9 47.3 91.2 62.7
78.1 42.5 94.4 57.9 111 73.3
97.6 53.1 114 68.5 130 83.9 163 115
119 86.8
97.7 54.4 125 79.7 151 105
130 72.5 157 97.8 184 123
163 90.6 190 116 217 141 270 192
224 163
178 95.6 231 145 283 195
238 127 290 177 343 226
297 159 350 209 402 258 510 357
281 210
228 132 293 193 357 254
304 176 369 237 433 298
381 220 445 281 509 342 638 463
447 316
363 184 465 281 568 377
483 245 586 342 689 439
604 306 707 403 810 500 1015 694
776 540
629 306 807 474 985 642
839 408 1017 576 1195 744
1049 510 1227 678 1404 846 1761 1182
1242 859
1064 532 1330 785
1152 459 1419 711 1685 962
1507 636 1773 888 20401140
1595 562 1861 814 2128106626611569
19231307
1647 793 2059 1182
1783 667 21961057 2608 1446
2332 931 2745 1321 31571710
2469 806 28811196 32941585 4119 2364

*When using one spring per end-cap, the larger outer spring should be used.
Air pressure below 5.5 bar will not normally be sufficient to compress the full set of springs in each end cap. For lower air pressures the number of springs must, therefore, be adjusted.
(IMPORTANT: Refer to Norbro Installation, Operating and Maintenance Manual or to our Sales Office for details.)

Norbro
Series 40R

Operating Conditions
Pressure
Limitation

8.3 bar Maximum. For higher pressures

contact our sales office.

Media

Air or non-corrosive fluid

Temperature
range

Standard -20C to +100C

Low temperature variant -40C to +85C
High temperature variant -20C to +150C

Rotation
(viewed from)
the top)

Pinion rotates anti-clockwise when the

centre chamber supply port (RHS) is
pressurised (see Page 4)

Travel
(all sizes)

Average 92 total travel including

nominal 1 overtravel both clockwise
and anti-clockwise.

Extended
travel option

180, 120 - Series 33. For further options

consult the Sales Office.

Adjustable
travel stop

Option available to adjust actuator stroke

through 20 from each end of travel.

Hydraulic
operation

Complete range available for operation

with hydraulic fluids at pressure,
temperature and torque conditions
corresponding to normal air supply.

Operating Speeds (Seconds) Actuator with no load

using Solenoid Control Valve 5.5 bar
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
open and close

0.2

0.2

0.3

0.4

0.7

1.0

2.1

2.4

3.7

6.0

7.0

12.0

Spring return
spring stroke (Closed)

0.1

0.2

0.3

0.5

0.6

1.1

2.1

2.6

4.1

7.2

9.0

15.0

Spring return
air stroke (Open)

0.1

0.2

0.3

0.5

1.0

1.2

2.5

2.8

4.9

8.9

12.0

21.0

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

50-40

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
AntiClockwise

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).

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

Norbro
Series 40R

Accessories and options

Worcesters V-Flow control valve incorporating

the 40R actuator provides precise and flexible
performance when modulating flow. Further
information on this product is available on request.

A wide range of ancillary equipment can be

fitted to meet the most exacting customer
requirements. This is an area where Worcester
has considerable experience and we would be
pleased to discuss any process problems.

Fast Acting
Modifications for quicker opening/closing
speeds.
Protective Coatings
Various coatings (eg Epoxy, PVC, etc.) are
available for marine, hygienic and spark
inhibition applications.

Geared Override
A retro fittable gearbox is available for
manual operation of the valve when power
is lost.

Norbro
Series 40R

Mounting Configurations

(all dimensions in mm)

ACTUATOR / VALVE INTERFACE

Size-Series
05-40R

ISO 5211

Valve to actuator mounting pattern is ISO 5211 (output drive 0).

NOTE: Norbro pattern (outer holes) also shown.

The DIN 3337 mounting pattern which has a 45 offset for the
output drive. NOTE: Norbro pattern (outer holes) also shown.

F03 x 9.00 sq

10-40R

F04 x 11.10 sq

15-40R

F05 x 14.27 sq

20-40R

F07 x 14.27 sq

25-40R

F07 x 19.05 sq

30-40R

F10 x 19.05 sq

33-40R

F12 x 25.40 sq

35-40R

F12 x 25.40 sq

40-40R

F14 x 28.57 sq

42-40R

F16 x 46.00 sq

45-40

Norbro x 44.45 sq

50-40

Norbro x 44.45 sq

Size-Series

DIN 3337

ISO 5211

DIN 3337

05-40R

F03 x 9.00 sq

10-40R

F04 x 11.00 sq

15-40R

F05 x 14.00 sq

20-40R

F07 x 17.00 sq

25-40R

F07 x 17.00 sq

30-40R

F10 x 22.00 sq

33-40R

F12 x 27.00 sq

35-40R

F12 x 27.00 sq

40-40R

F14 x 36.00 sq

42-40R

F16 x 46.00 sq

45-40

F16 x 46.00 sq

50-40

F25 x 55.00 sq

TOP MOUNT INTERFACE

Namur (VDI/VDE
3845) mounting
configuration
facilitates the fitting
and interchangeability
of all types of
top-mounted
ancillaries.

10

Size-Series

Pitch - Height

05-40R

10-40R

80 x 30 - 20 H

15-40R

80 x 30 - 20 H

20-40R

80 x 30 - 20 H

25-40R

80 x 30 - 30 H

30-40R

80 x 30 - 30 H

33-40R

80 x 30 - 30 H

35-40R

80 x 30 - 30 H

40-40R

130 x 30 - 50 H

42-40R

130 x 30 - 50 H

45-40

130 x 30 - 50 H

50-40

130 x 30 - 50 H

Norbro
Series 40R

END MOUNT ACCESSORIES

Norbros unique end-mounted J-switch enclosure is suitable for any standard 40R actuator
(except size 05).

Namur (VDI/VDE 3845 pattern) interface allows

direct end-mounting of solenoids (all ports are
G14 except size 05 and 10 which are G1/8 ).

OUTLINE SPECIFICATIONS (For detailed information refer to General Arrangement drawings, available from Sales Office)
Torque
@@
5.55.5
barbar
Torque

Envelope
Dimensions
Envelope
Dimensions

SizeSeries

Double Acting
Nm

End of Spring
Nm

Length
mm

Height
mm

Width
mm

Weight
kg

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

11
31
60
109
183
300
587
720
1149
1993
2984
4617

5
12
21
38
66
105
227
263
422
731
1071
1654

138*
155
194
235
270
325
397
422
508
616
576
626

70
106
124
145
177
198
244
247
326
366
424
474

67
77
94
116
136
155
206
213
245
283
335
388

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

* Spring return version double acting length is 106mm.

11

Norbro
Series 40R

Basic information on Norbro pneumatic actuators

(For full explanation of product code, refer to Worcester Spec No. 300034 Section F)
Number
of Springs

Size
(First 2 digits
of full product code)
(40R)

05

A = 0
B = 4
F = 2

10
15
20

A = 0

25

B = 10

(40R)

30

C = 8

33

D = 6

35

E = 4

(6th digit of full product code)

40
42
(40)

45
50

A = 0
B = 24
P1 = 20
P2 = 16
P4 = 12
P3 = 8

(Digits 19 & 20 of full product code)

Variants

Norbros Series 61 two-stage actuator is

designed for drum filling applications.

TM

The Series 33 180 actuator provides the

perfect solution for Worcesters range of
multi-ported valves.

Flowserve Flow Control (UK) Ltd

Burrell Road, Haywards Heath, West Sussex RH16 1TL
T: +44 (0)1444 314400 F: +44 (0)1444 314401
E-mail: wvukinfo@flowserve.com
TM indicates a trade mark of Worcester Controls Information given in this leaflet is made in
good faith and based upon specific testing but does not, however, constitute a guarantee
Website: www.worcestercontrols.co.uk

Published and Printed by Worcester Controls

Copyright Worcester Controls

PB29 REV 01/03 UK