Pneumatic Rack & Pinion ActuatorProduct Guide and Data

DIE ERSTE INDUSTRY CO., LTD. A name with a promise.

CM-302VT

Aluminum extruded body with

hard-coat anodized surface for

superior wear and corrosion

protection both inside and

outside.

Cartridge arrangement for

spring sets provides steady

forces allowing self-change

flexibility

Die cast aluminum end

caps are epoxy-coated to

protect against corrosion.

The company logo may be

cast on the end caps upon

request

Stainless steel screws are

used as standard

Standardized accessory

interfaces for VDI/VDE 3845

(NAMUR), and easy mounting

of limit switches and other

accessories

NBR rubber for standard

version. Viton and Silicone

o-ring are available for high

or low temperature

applications upon request.

Dual piston rack and pinion

design with maximized gear

tooth engagement

Two independent external

travel-stops provide ± 5°

stroke adjustment.

The pneumatic rack and pinion actuators are required to

operate in a variety of applications. Die Erste realizes that

the performance of the actuators is significantly

important to your production process. Therefore, our

pneumatic rack and pinion actuators have been

designed, developed and tested using the newest

technology, materials and innovation, providing excellent

usage in various industrial environments.

High performance

Reliable

Economical (one model covers multiple sizes)

Full conformance to most recent international

standards

Fluid, compact and modern design

Safe and quick disassembly of the pre-loaded springs

2

3

“A” “B” “A” “B”

“A” “B” “A” “B”

Air supplied to Port “A” forces the piston

to move counter clockwise while the

exhaust air exits from Port “B”.

Air supplied to Port “B” forces the piston to

move clockwise while exhaust air exits

from Port “A”.

Air supplied to Port “A” forces the pinion to

move counter- clockwise to compress the

spring while exhaust air exits from Port “B”.

Upon loss of air pressure (air or electric

failure) at Port “A “ the spring forces the

pinion to move clockwise while exhaust air

exits from Port“B”.

Depending on the air supply, spring function and valve’s

torque, there are different spring combinations available

ranging from 2 to 6 springs in each end cap. Tip: Because of

the position of the racks, it is recommended for the spring

arrangement to install springs where the rack that comes in

contact with piston surface is positioned, in order to

compensate for the non-uniformity of forces caused by the

asymmetry of the racks.kasymmetry of the racks.

ITEM Nº123456789

1011121314151617181920212223242526

DESCRIPTIONIndicator screw

Position indicator

Spring clip

Thrust washer

Thrust bearing (Outside)

Body

Thrust bearing (Inside)

Stroke cam

O-ring (Pinion top)

Bearing (Pinion top)

Pinion

Bearing (Pinion bottom)

O-ring (Pinion bottom)

Plug

O-ring (Adjust screw)

Washer (Adjust screw)

Nut (Adjust screw)

Adjust screw

Piston

Guide (Piston)

O-ring (Piston)

Bearing (Piston)

Spring (Cartridge)

O-ring (End cap)

End cap

Cap screw

STANDARD MATERIALPlastic with stainless steel

Plastic

Stainless steel

Stainless steel

POM

Extruded aluminum alloy

POM

Stainless steel

NBR

POM

Alloy steel

POM

NBR

NBR

NBR

Stainless steel

Stainless steel

Stainless steel

Cast aluminum

POM

NBR

POM

High performance spring steel

NBR

Cast aluminum

Stainless steel

PROTECTION

Hard anodized

Nickel plated

Anodized

Painted

QUANTITY1

1

1

1

1

1

1

1

1

1

1

1

2

2

2

2

2

2

2

2

2

2

Max. 12

2

2

8

4

5

The standard lubricant is suitable for application from

-20°C to +80°C (-4°F to +176°F).

Twin piston rack and pinion design, offering constant

output torque, compact design and internal balance,

is suitable for indoor and outdoor installation.

Bottom drilling to mach valve is in accordance with

ISO5211/DIN3337. Interface for solenoid valve, shaft

top end and top drilling to assemble accessories are in

accordance with VDI/VDE 3845, NAMUR standard.

100% fully tested.

Filtered dry or lubricated air, inert/non-corrosive gas, water

or light hydraulic oil. Note that the maximum size of particle

must not exceed 30µm.

2.5 bar (36 psi) to 8 bar (116 psi) for double acting

actuation

3 bar (44psi) to 8 bar (116psi) for spring-return actuation

Standard type: -20°C to +80°C (-4°F to +176°F)

Low temperature type: -40°C to +80°C (-40°F to

+176°F) with Silicon O-ring

High temperature type: -15°C to +150°C (+5°F to

+300°F) with Viton O-ring

Note:Note: For low and high temperature service condition, the

special grease is required. For further information, please

contact your DIE ERSTE sales.

Standard ±5° in both clockwise and counterclockwise

directions by means of adjusting screws outside the internal

air supply changers.

Air Hold

Dim

ensi

ons

in m

m

050SRDA 065SR

DA 075 085SRDA 095SR

DA 110SRDA 125SR

DA 140SRDA 160SR

DA 190SRDA 210SR

DA 250SRDA 270SR

DA Model N

A

B

C

E

NA

G

I

O

L

N

Q

K

SRDA

45

70.5

70

41

20

F03 ψ36

F05 ψ50

M5 X 8dp

M6 X 10dp

11

154

80

12

G1/8"

62

89.5

89

51

20

F05 ψ50

F07 ψ70

M6 X 10dp

M8 X 12dp

14

189

80

16

G1/8"

64

84.5

100

59

20

F05 ψ50

F07 ψ70

M6 X 10dp

M8 X 12dp

14

210

80

16

G1/8"

68

112.5

113

63

20

F05 ψ50

F07 ψ70

M6 X 10dp

M8 X 12dp

17

225

80

16

G1/8"

92

125.5

123

71

20

F07 ψ10

F10 ψ102

M8 X 12dp

M10 X 16dp

17

264

80

19

G1/8"

93

138.5

136

76

20

F07 ψ70

F10 ψ102

M8 X 12dp

M10 X 16dp

17

266

80

22

G1/8"

96

157

161

85

30

F07 ψ70

F10 ψ102

M8 X 12dp

M10 X 16dp

22

337

80

22

G1/4"

112

173

178

97

30

F10 ψ102

F12 ψ125

M10 X 16dp

M12 X 20dp

27

346

80

27

G1/4"

110

196

200

106

30

F10 ψ102

F12 ψ125

M10 X 16dp

M12 X 20dp

27

412

130

27

G1/4"

135

205

230

110

30

F10 ψ102

F14 ψ140

M10 X 16dp

M16 X 25dp

36

510

130

38

G1/4"

135

213

255

117

30

-

F14 ψ140

-

M16 X 25dp

36

584

130

38

G1/4"

164

251

310

136

30

-

F14 ψ140

-

M20 X 25dp

46

660

130

53

G1/2"

H (ISO Flange)

OUTPUT TORQUE FOR ACTUATORS WITH DOUBLE ACTIVE MODE (Unit: NM)

3 bar

10.2

17.8

35.3

55.6

79.8

130.6

168

261

344

459

638

1072

3.5 bar

11.7

20.7

41

64.6

93.1

151.2

195.5

304

400

536

745

1251

4 bar

14.1

24.9

49.2

77.5

106

182

235

348

480.6

613

851

1430

4.5 bar

15.8

28.8

55.3

84.1

120

195

263

391

539.7

689

957

1608

5 bar

17.6

31

61.6

93.5

133

217.5

293

435

599.8

766

1064

1787

5.5bar

18.5

33.5

64.6

98.5

146

228

308

478

630.1

842

1170

1966

6 bar

20.6

37.6

72.2

109.9

160

255.3

343.5

522

704.6

919

1276

2144

7 bar

24.1

43.8

84.2

128

186

297.9

401.5

609

821.5

1072

1489

2502

8 bar

27.5

50

96.3

146

213

340.5

458.4

696

939.5

1225

1702

2859

10.2 11.7 14.1 15.8 17.6 18.5 20.6 24.1 27.5

35.3 41 49.2 55.3 61.6 64.6 72.2 84.2 96.3

79.8 93.1 106 120 133 146 160 186 213

168 195.5 235 263 293 308 343.5 401.5 458.4

344 400 480.6 539.7 599.8 630.1 704.6 821.5 939.5

638 745 851 957 1064 1170 1276 1489 1702

Model N

Air supply

DA 050DA 065DA 075DA 085DA 095DA 110DA 125DA 140DA 160DA 190DA 210DA 250DA 270

DIE ERSTE reserves the right to change product design and specifications without notice.Copyright © 2008 by DIE ERSTE INDUSTRY CO., LTD.

7

Mod

el N

090

090

090

090

090

090

090

Am

ount

of S

prin

gs

in O

ne S

ide

Sprin

g R

etur

nO

UTP

UT

TOR

QU

E FO

R S

PRIN

G R

ETU

RN

AC

TUAT

OR

S W

ITH

SIN

GLE

AC

TIVE

MO

DE

(Uni

t: N

M)

4 B

ar4.

5 B

ar5

Bar

6 B

ar7

Bar

5.5

Bar

SR05

0

SR06

5

SR07

5

SR08

5

SR09

5

SR11

0

SR12

5

SR14

0

SR16

0

SR19

0

SR21

0

SR25

0

SR27

0

3 4 5 6 3 4 5 6 3 4 5 6 3 4 5 6 3 4 5 6 3 4 5 6 3 4 5 6 3 4 5 6 3 4 5 6 3 4 5 6 3 4 5 6 3 4 5 6 3 4 5 6

4.2

6.4

8.2

9.2

5.9

8.3

13.1

13.1

13.5

17.8

22 26.3

17.5

22.4

32.5

41.8

30.4

40.5

50.7

60.8

39.4

55.6

82.0

86.5

51.3

66.7

86 99 98.8

132

165

198

115

158

201

265

190

253

316

417

258

340

425

510

433

577

721

865

6.4

8.5

12 12.1

9.5

11.2

16.9

18.5

20.6

26.9

35.1

40.6

27.5

40.2

49.8

64.3

47.3

63 78.8

94.5

63.2

89.2

118

128.

3

79.2

108.

2

133

155.

5

155

206

258

309

168

235

298.

1

395

284

379

474

625

378

504

630

756

625

834

1042

1251

10.3

8.5

17.2

15.3

33.1

28.6

52.1

42.5

76 65.8

125

113

105.

2

125.

5

108.

5

249

216

348

298

253

423

360

423

360

997

853

8.6

6.2

13.2

10.6

25.5

18.5

36.4

25.8

59.1

43.3

99 79.4

59.5

94.3

69.5

193

142

285

231

158

329

234

329

234

804

596

11.3

10.6

8.6

20.6

17.2

15.8

39 34.7

30.2

62.3

48.6

42.8

89.3

79.1

69 138

132

124.

1

146.

3

129

113

293

260

227

367

315

286

500

436

373

500

436

373

1176

1032

887

9.9

8.6

5.3

18.9

12.6

12.5

30.8

24.7

17.7

49.5

32 24 72.4

56.6

40.9

112.

5

99.2

76.8

114.

9

90.2

64.3

237

185

134

355.

6

247

178

405

310

216

405

310

216

983

774

566

12.9

13.5

10.2

25 23.1

21.2

16.2

44.9

40 36.1

33.8

71.2

53.5

53.5

103

92.4

82.3

85.4

167.

3

153.

6

145.

3

168.

3

153.

1

139

336

303

270

281

410

359

372

576

513

450

463

576

513

450

660

1354

1210

1066

1101

10.9

9.9

5.9

19.2

16.3

15.3

9.8

37.4

30.5

33.6

20.1

59.5

38.3

35 86 69.9

54.2

51.7

137.

8

118.

7

96.5

137

114.

4

82.4

280

229

177

169

348

277

278.

2

482

397

292

174

482

387

292

414

1162

953

745

715

15.8

13.7

13.2

11.2

25.8

24.6

23.5

19.3

50.7

46.3

41.9

39.7

78.6

75 67.5

56.4

116

106

95.6

99

183.

6

175.

3

168.

5

152.

6

191

176.

2

152

137.

2

379

347

314

281

440

415

432

354

653

589

526

540

915

830

745

766

1533

1389

1245

1279

11.9

11.2

8.4

7.7

22.1

19.3

18.3

11.9

43.2

36.3

29.4

25.9

68.9

58.3

50 33.4

99 83.2

67.5

65

143.

2

135

115

102

159.

5

134.

7

102.

7

77.8

324

272

221

169

382.

5

336

324

227

558

464

369

351

792

666

540

520

1340

1132

923

894

15.7

15.2

14.6

13.6

28.5

26.3

26.4

22.9

56.6

52.1

47.7

42.8

87.8

84.5

80.9

68.9

129

119

109

125

207

198.

2

184.

2

173.

2

242.

1

198.

2

171.

5

152.

8

423

390

357

324

491.

4

468

482

418

666

603

693

936

851

979

1568

1324

1637

14.1

13.9

11.5

9.3

25.1

21.9

19 14.8

49 42.1

35.2

28.3

75.2

65.7

52.8

43.2

112

96.5

80.8

92 177

164

135

124.

8

210

160

123.

4

99.8

367

316

264

213

432.

9

397

388

186

540

445

504

772

646

733

1310

1102

1251

19.2

18.4

18.2

14.7

34.4

33.2

32.8

27.2

68.2

63.7

59.3

54.9

105

99.5

92.1

83.2

156

146

135

152

250

235

224.

5

215.

6

292.

5

238.

1

219.

2

204.

1

510

477

444

498

594

527

596

519

819

756

846

1149

1064

1192

1925

1781

1994

17.6

15.8

14.4

10.7

30.9

27.6

24.1

20.8

60.7

53.7

46.8

34.9

93.1

83 68.8

59.1

139

123

107

118

221

198

185.

2

169.

5

260.

1

201.

5

175.

2

148

454

403

351

386

535.

5

453

497

394

693

599

657

985

859

946

1668

1459

1608

DIE

ERST

E re

serv

es t

he r

ight

to

chan

ge p

rodu

ct d

esig

n an

d sp

ecifi

catio

ns w

ithou

t no

tice.

Copy

right

© 2

008

by D

IE E

RST

E IN

DU

STRY

CO

., LT

D.

Air Hold

Dim

ensi

ons

in In

ch

050SRDA 065SR

DA 075 085SRDA 095SR

DA 110SRDA 125SR

DA 140SRDA 160SR

DA 190SRDA 210SR

DA 250SRDA 270SR

DA Model N

A

B

C

E

NA

G

I

O

L

N

Q

K

SRDA

1.77

2.78

2.76

1.61

0.79

F03 ψ1.42

F05 ψ1.97

M5 X 0.31dp

M6 X 0.39dp

0.43

6.06

3.15

0.47

G1/8"

2.44

3.52

3.50

2.01

0.79

F05 ψ1.97

F07 ψ2.76

M6 X 0.39dp

M8 X 0.47dp

0.55

7.44

3.15

0.63

G1/8"

2.52

3.33

3.94

2.33

0.79

F05 ψ1.97

F07 ψ2.76

M6 X 0.39dp

M8 X 0.47dp

0.55

8.27

3.15

0.63

G1/8"

2.68

4.43

4.45

2.48

0.79

F05 ψ1.97

F07 ψ2.76

M6 X 0.39dp

M8 X 0.47dp

0.67

8.96

3.15

0.63

G1/8"

3.62

4.94

4.84

2.80

0.79

F05 ψ1.97

F10 ψ4.02

M8 X 0.47dp

M10 X 0.63dp

0.67

10.39

3.15

0.75

G1/8"

3.66

5.45

5.35

2.99

0.79

F07 ψ2.76

F10 ψ4.02

M8 X 0.47dp

M10 X 0.63dp

0.67

10.47

3.15

0.87

G1/8"

3.78

6.18

6.34

3.35

1.18

F07 ψ2.76

F10 ψ4.02

M8 X 0.47dp

M10 X 0.63dp

0.87

13.27

3.15

0.87

G1/4"

4.33

6.81

7.01

3.82

1.18

F10 ψ4.02

F12 ψ4.92

M10 X 0.63dp

M12 X 0.79dp

1.06

13.62

3.15

1.06

G1/4"

4.41

7.72

7.87

4.17

1.18

F10 ψ4.02

F12 ψ4.92

M10 X 0.63dp

M12 X 0.79dp

1.06

16.22

5.12

1.06

G1/4"

5.32

8.07

9.06

4.33

1.18

F10 ψ4.02

F14 ψ5.51

M10 X 0.63dp

M16 X 0.98dp

1.42

20.08

5.12

1.50

G1/4"

5.32

8.39

10.04

4.61

1.18

-

F14 ψ5.51

-

M16 X 0.98dp

1.42

22.99

5.12

1.50

G1/4"

6.46

9.88

12.20

5.35

1.18

-

F14 ψ5.51

-

M16 X 0.98dp

1.81

25.98

5.12

2.09

G1/2"

H

Model N

OUTPUT TORQUE FOR PNEUMATIC ACTUATOR WITH DOUBLE ACTIVE MODE (Unit: in-lbs)Air supply

40 psi

83.9

145.1

288.0

453.6

649.4

1067.8

1369.3

2126.1

2805.1

3733.1

5189.0

8722.2

DA 050DA 065DA 075DA 085DA 095DA 110DA 125DA 140DA 160DA 190DA 210DA 250DA 270

50 psi

102.2

180.5

357.6

563.5

811.8

1319.3

1705.0

2651.1

3488.8

4673.2

6495.5

10907.8

60 psi

128.9

229.8

450.3

702.0

972.2

1642.5

2147.9

3184.4

4397.1

5610.0

7789.3

13088.7

70 psi

150.3

267.6

525.9

798.7

1137.3

1856.1

2501.3

3715.2

5124.5

6543.7

9089.3

15267.8

80 psi

164.4

297.7

574.0

875.1

1296.3

2025.9

2736.4

4243.6

5598.6

7475.0

10386.6

17453.0

90 psi

188.7

344.1

660.9

1005.7

1463.6

2337.4

3146.1

4778.9

6449.6

8413.1

11682.4

19629.5

100 psi

210.1

381.9

734.1

1116.2

1622.2

2597.2

3499.9

5309.7

7162.8

9346.5

9346.5

12981.8

110 psi

230.9

419.8

807.9

1226.1

1786.1

2857.3

3848.3

5840.7

7882.1

10280.5

14282.0

23993.7

120 psi

251.7

457.6

881.8

1336.0

1950.9

3117.4

4195.7

6371.8

8602.4

11214.5

15582.3

26173.1

DIE ERSTE reserves the right to change product design and specifications without notice.Copyright © 2008 by DIE ERSTE INDUSTRY CO., LTD.

9

Mod

el N

090

090

090

090

090

090

090

Am

ount

of S

prin

gs

in O

ne S

ide

Sprin

g R

etur

nO

UTP

UT

TOR

QU

E FO

R S

RPI

NG

RET

UR

N A

CTU

ATO

RS

WIT

H S

ING

LE A

CTI

VE M

OD

E (U

nit:

in-lb

s)

60 p

si70

psi

80 p

si10

0 ps

i11

0 ps

i90

psi

SR05

0

SR06

5

SR07

5

SR08

5

SR09

5

SR11

0

SR12

5

SR14

0

SR16

0

SR19

0

SR21

0

SR25

0

SR27

0

3 4 5 6 3 4 5 6 3 4 5 6 3 4 5 6 3 4 5 6 3 4 5 6 3 4 5 6 3 4 5 6 3 4 5 6 3 4 5 6 3 4 5 6 3 4 5 6 3 4 5 6

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8.8

DIE

ERST

E re

serv

es t

he r

ight

to

chan

ge p

rodu

ct d

esig

n an

d sp

ecifi

catio

ns w

ithou

t no

tice.

Copy

right

© 2

008

by D

IE E

RST

E IN

DU

STRY

CO

., LT

D.

The actuator obtains its torque due to rotation of the pinion and

cylinder. The torque, which for this construction is linear as

shown in Figure.1, depends mainly on the diameter of the

cylinder and the supply pressure. The suggested safety factor for

double acting actuators in normal working conditions is 20%.

OUTPUT TORQUE FOR ACTUATORS WITH DOUBLE ACTIVE MODE (Unit: NM)

3 bar

10.2

17.8

35.3

3.5 bar

11.7

20.7

41

4 bar

14.1

24.9

49.2

4.5 bar

15.8

28.8

55.3

5 bar

17.6

31

61.6

5.5bar

18.5

33.5

64.6

6 bar

20.6

37.6

72.2

7 bar

24.1

43.8

84.2

8 bar

27.5

5017.8 20.7 24.9 28.8 31 33.5 37.6 43.8 50

Model N

Air supply

DA 050

DA 065

DA 075 0° 90°Actuator Rotation

Torq

ue in

Nm

38.4

0° 90°Actuator Rotation

Torq

ue in

Nm

Published ball valve torque = 32 Nm

Safety factor = 20%

Maximum required torque with safety factor (the deep blue

region in Figure.2) = 32 x (1+20%) = 38.4 Nm

Air supply pressure = 5.5 bar

According to the output torque table on page x, we obtain that

the double acting actuator that produces a minimum of 38.4

Nm at 5.5 bar is DA 075.

0° 90°ttutututututuAAAcAcAcAcAcAcAcActttttttuuuuuu tatatatatatatorororororor RRRRRRRRR R totototototot tatatatatatatiiioioioioioioioionnnnnn

ToTorqrq

ueuei inn

Nm

Nm

4

10

11

In the construction for single active mode, the springs are used to return the

actuator to its initial position. The torque depends not only on the diameter

of the cylinder and the supply pressure but also on strength of the springs

that have to be compressed to guarantee the return. In Figure.3, the torque

from the air stroke decreases linearly from its highest value, due to

compression of the springs and the force they exert. The return of the

cylinder is generated by the force of the springs. In the initial stage the

torque is the highest and it decreases linearly, in proportion to the decrease

of force of decompressing springs. The operation region (green region)

should cover the maximum torque the valve requires. Note that it is

recommended to apply the safety factor approximate to 20%.

Model NType Amount of Springsin one side Flange Type Square Seals

DA = Double Acting(standard clockwise to close)

SR = Spring Return(standard clockwise to close)

050

065

075

085

095

110

125

140

160

190

210

250

270

3

4

5

6

F03 & F05

F05 & F07

F05 & F07

F05 & F07

F07 & F10

F07 & F10

F07 & F10

F10 & F12

F14

F16

F16

F25

11

14

17

17

22

22

22

22

27

27

27

36

Standard = NBR seals(no need to be specified)

HT = Viton seals(for high temperature)

LT = Silicon seals(for low temperature)

0° 90°Actuator Rotation

Torq

ue in

Nm

Published butterfly valve torque = 90 Nm

Safety factor = 20%

Maximum require torque with safety factor (the orange region in Figure.4)

= 90 x (1+20%) = 108 Nm

Amount of springs in one side = 6

Air supply pressure = 6 bar

According to the output torque table on page 7, we obtain that the single

acting actuator that produces a minimum of 108 Nm at 6 bar is SR 140.

0° 90°Actuator Rotation

Torq

ue in

Nm

108

0° 90°aaaaaaaaA tActActActActActActActctuuuuuuuu tatatatatatatatatororororororor o R tRotRotRotRotRotRotRotot tiatiatiatiatiatiatiatiat ononononononono

08

Nm

Nm

Nm

Nm

Nm

Nm

Nmmmmmmmm

Tor

Tor

TororTorq

ueque

que

que

que

que

qqqqqqininininin in in

NNNNN N N

8

Taiwan5F.-1, No.936, Sec. 4, Wen-Sin Rd., Taichung City 406, TaiwanT +886(4)2231 0059F +886(4)2236 0236

ShanghaiRoom 1803, No. 678,Gu-Bei Road,Shanghai, ChinaT +86(21)6295 6805F +86(21)6295 6809

DIE ERSTE INDUSTRY CO., LTD.www.die-erste.com sales@die-erste.com