PN Series Pneumatic Actuator Brochure

Engineering Creative Solutions for Fluid Systems Since 1901

INDEX

2 I Pratt Industrial

General Overview ................................................................................................................................ 2  

Features ................................................................................................................................................ 2  

Parts List MOD63~MOD140 .............................................................................................................. 4  

Parts List MOD160~MOD240 ............................................................................................................ 5  Technical data ...................................................................................................................................... 6  Actuator dimension (Inch) ................................................................................................................... 7  

Dimension of MOD63~MOD140 .................................................................................................... 7  Dimension of MOD160~MOD240 .................................................................................................. 8  

Actuator body drillings for solenoid mounting (Namur standard, mm (Inch) ) .................................. 9  

Actuator top drillings for accessory mounting (Namur standard, mm (Inch) ) ................................... 9  

Mounting flange dimension details (Inch) ......................................................................................... 10  

Operation principle of double acting actuator ................................................................................... 11  

Double acting actuator torque output: ............................................................................................... 11  

Operation principle of spring return actuator: ................................................................................... 12  

Spring returen actuator torque output MOD SR63 ~SR140 .............................................................. 13  

Spring returen actuator torque output MOD SR160 ~SR240 ............................................................ 14  

PRATT INDUSTRIAL PNEUMATIC RACK & PINION ACTUATORS

Pratt Industrial I 3

General Overview Designed and manufactured for the ultimate in durability and reliability, the Pratt Industrial Pneumatic Rack & Pinion Actuators provide outstanding service life.

• Compact Rack & Pinion Design utilizing the whole piston area develop output torque.• Quarter-Turn Operation• Designed for use on a variety of valve types: ball valves, butterfly valves, plug valves

dampers.etc.• Hard anodized aluminum bod.• Chromate corrosion protection on all aluminum components.• Suitable for indoor and out door installation.• Adjustable travel double stops. 90 degrees +/- 5 degrees• Double acting type torque outputs from in-lbs to in-lbs with an 80 psi air supply.• All moving parts are factory lubricated. No additional lubrication required.• Removable/ replaceable drive inserts.• Pre-loaded spring assemblies.• ISO 5211 valve mounting.• NAMUR (VDI/VDE) accessory mounts.• Anti Blow-Out pinion design• Maximun pressure rating: 116 psi.• Compatible media: clean, dry air, filtered noncorrosive gas or light hydraulic oil.• Mounting dimensions are KV standards and ISO standards for direct mounting

capabilities.

Features

• The hard anodized actuator body, along with the control modules, are protected fromcorrosive environments with a protective finish that has passed a 1,000 hour-salt spray testper ASTM B117

• Die cast aluminum end caps with polyester powder coat finish. Using the same end caps onboth SR and DA actuators allows customers to lower inventory costs and give quickinterchangeability allowing customer to convert SR units to DA units by adding Springs only.

• Die casting aluminum piston.The precision-machined rack is chrome plated for optimalperformance. It has a three point guiding system for moving stable and extended servicelife. High qualified seamless O-rings for air-tight sealing and long service life.

• Anti Blow out pinion design.• Superior stability and field safety spring package (sizes 63 through 140). The PN series

pneumatic actuator utilizes two embedded springs, an inner and outer springs allowing forfive different spring torques. The design also allows equal and evenly distributed force toeach piston extending service life.

• The encapsulated spring package, with corrosion-protected, can be easily-disassembledwith a standard Allen wrench for conversion of double-acting to spring-return configurationon sizes 63 through 140.

• Anti-friction housing guide band ensures no metal to metal contact and provides wearprotection between housing and piston for extended service life. Ideal for modulating oron/off control applications.

• All hardwares are 304 stainless steel.• Cycle life is more than 500,000 cycles.

4 I Pratt Industrial

ANTI-BLOWOUT SYSTEM

Piston provided with anti-blowout flat key

MOUNTING VARIATIONS

Counterclockwise Rotation

Closed Opened

Cloockwise Rotation

View from the top of the pinion

All views illustrated in the open position

Bi-directional travel stops

- Adjustable stops on the center of the body provide the flexibility of accurate valve rotational positioning at the end of the 'open' and 'close' stroke.

- The total travel of 100 degrees allows for end of travel adjustment of 5 degrees at both open and close positions.

- Travel stops must not be used for manual override purposes. - Travel stops on actuators with reverse action require special build and must be specified at

time of ordering.

PARTS LIST MOD63-MOD140

Item Part Name QTY Material Standard Protection Optional Material

1 Body 1 Extruded ASTM 6000 Hard anodized --

2 Pinion 1 Carbon steel ASTM 1045 Nickel plated Aluminum

3 Piston 2 Die casting ASTM A380 Chromatized

4 End cap 1 Die casting ASTM A380 Powder Coating

5 End cap 1 Die casting ASTM A380 Powder Coating

6 Cam 1 Stainless steel ASTM 304 Viton/silicone

7 Washer 1 POM PTFE

8 Washer 1 POM

9 Guide band 1 POM PTFE

10 O-ring 2 NBR Viton/silicone

11 Bearing 2 POM PTFE

12 O-ring 2 NBR Viton/Silicone

13 O-ring 1 NBR Viton/silicone

14 O-ring 1 NBR Viton/silicone

15 Spring 0-2 Spring steel Spring steel Dip coating

16 Nameplate 1 Adhesive

17 Indicating 2 ABS

18 Cap Bolt 8 Stainless steel ASTM 304

19 Washer 1 Stainless steel ASTM 304

20 Spring Clip 1 Stainless steel ASTM 304

21 Stop Bolt 2 Stainless steel ASTM 304

22 Nut 2 Stainless steel ASTM 304

23 Washer 1 Stainless steel ASTM 304

Pratt Industrial I 5

PARTS LIST MOD160-240

Item Part Q Material Standard Protection Option

1 Body 1 Extruded Aluminum ASTM 6000 Hard anodized --

2 Piston 2 Die casting aluminum ASTM A380 Chromatized

3 Pinion 1 Carbon steel ASTM 1045 Nickel plated Aluminum

4 End cap 2 Die casting aluminum ASTM A380 Powder polyster

5 Spring 0-12 Spring steel Spring steel Dip coating

6 Cam 1 Stainless ASTM 304

7 Bearing 2 POM PTFE

8 O-ring 2 NBR Viton/Silicone

9 O-ring 2 NBR Viton/silicone

10 Guide band 4 POM PTFE

11 O-ring 1 NBR Viton/silicone

12 Bearing 1 POM PTFE

13 O-ring 1 NBR Viton/silicone

14 Washer 1 Nylon PA66

15 Washer 1 Stainless steel ASTM 304

16 Spring clip 1 Stainless steel ASTM 304

17 O-ring 2 NBR Viton/silicone

18 Washer 2 Stainless steel ASTM 304

19 Nut 2 Stainless steel ASTM 304

20 Stop Bolt 2 Stainless steel ASTM 304

21 Cap Bolt 8 Stainless steel ASTM 304

22 O-ring 2 NBR

. I Pratt Industrial

TECHNICAL DATA

Pratt Industrial I 7

Max. supply pressure: 145PSI Rated supply pressure: 120 PSI

Output torque @80 PSI: Double acting models: up to 56,552 In-lbs Spring return models: up to 20,356 In-lbs

Temperature range: Standard Temp: High Temp: Low Temp:

-4°F to 180°F (NBR)-4°F to 250°F (Viton)-40°F to 180°F (Silicone)

Actuator weight (lb.) MOD   63   85   100   125   140   160   190   210   240   270   300   350  

DA   3.3   7.5   11.1   22.1   35.7   43.7   72.8   106   152   220   249   295  

SR  (Full  Springs)   4.0   9.5   14.5   29.6   48.5   77.2   99.2   126   179   267   298   373  

Actuator operating time (Second) MOD   63   85   100   125   140   160   190   210   240   270   300   350  

DA  Open   0.06   0.20   0.30   0.83   1.20   1.50   2.00   2.70   3.50   4.00   5.00   6.00  

Close   0.08   0.19   0.27   0.66   1.30   1.70   2.20   3.20   4.00   4.50   5.70   7.00  

SR  Open   0.14   0.31   0.44   1.08   1.80   2.10   2.40   3.50   4.10   4.50   6.40   7.50  

Close   0.14   0.33   0.46   0.90   1.60   1.80   2.80   3.90   4.60   5.00   7.60   8.50  

The  above  approximated  actuator  operating  time  are  obtained  at  the  pressure  of  6  Bar  without  load.  

Actuator air consumption (L) MOD   63   85   100   125   140   160   190   210   240   270   300   350  

Open   0.19   0.51   0.79   1.63   2.40   3.10   4.30   5.90   10.00   14.50   23.80   36.00  

Close   0.23   0.64   1.00   2.21   3.80   4.90   6.90   9.50   15.20   21.40   38.10   45.00  

The  above  data  are  obtained  at  room  temperature.  

ACTUATOR DIMENSION (Inch)

Dimension of MOD63~MOD240

Bottom� o� f� shaft� Mounting� Holes�

Mod� A� B� C� D� E� F� G� L� K� J� N� T� M� H� I� Key� NO� X� Size� PCD�

63� 7.32� 3.23� 3.97� 2.91� － － 0.039� 0.157� 0.79� � 1.12� 0.56� 0.38� 1.32� － － 4  X  3/8-­‐16� UNC  X0.5  DP� 3.25�

85� 10.12� 4.13� 5.12� 2.91� － － 0.047� 0.157� 0.79� 1.57� 0.76� 0.50� 1.36� － － 3.25�

100� 11.81� 4.84� 5.87� 3.46� － － 0.047� 0.157� 0.79� 1.83� 0.76� 0.50� 1.36� － －

－

－

－

4  X  3/8-­‐16� UNC  X0.5  DP�

4  X  3/8-­‐16   � UNC  X0.5  DP   3.25�

125� 15.35� 5.87� 7.44� 4.33� － － 0.059� 0.157� 1.18� 2.3� － － 1.36� 1.25� 1.13� 0.25� 4  X  3/8-­‐16  UNC  X0.5  DP   3.25�

5.00�

140� 17.66� 6.54� 8.34� 4.41� － － 0.059� 0.157� 1.18� 2.69� － － 2.00� 1.25� 1.13�

� 4  X  1/2-­‐13  UNC  X0.625  DP  

0.25� 4  X  3/8-­‐16  UNC  X0.5  DP   3.25�

5.00�

160� 19.06� 7.74� 8.86� 4.41� 6.22� 6.89� 0.08� 0.157� 1.18� 1.97� － － 2.00 1.25� 1.13�

4  X  1/2-­‐13  UNC  X0.625  DP  

0.25� 4�� � 1/2-­‐13  UNC  X0.625  DP� 5.00�

4  X  3/8-­‐16  UNC  X0.50  DP� 3.25�

190� 21.73� 9.09� 10.31� 4.57� 6.97� 8.11� � 0.08� 0.157� 1.18 2.34� － － 2.90� 1.52� 1.38� 0.32� 4  X  1/2-­‐13  UNC  X0.625DP� 5.00�

210� 23.26� 9.90� 11.34� 6.14� 8.07� 8.98� 0.08� 0.157� 1.18 2.62� －� － 3.60� 2.06� 1.88� 0.50� 6.5�

5.00�

240� 27.64� 11.15� 12.76� 6.22� 8.86� 10.24� 0.12� 0.157� 1.18 2.8� － － 3.60� 2.06� 1.88� 0.50� 6.50�

4 X 3/4-10� UNC� X1.00� DP�

4 X 1/2-13  UNC  X0.625DP�

4 X 3/4-10� UNC  X1.00  DP    

8 I Pratt Industrial

Actuator body drillings for solenoid mounting (Namur standard, (Inch))

Actuator top drillings for accessory mounting (Namur standard, (Inch))

MOD125~240

MOD63~85

Pratt Industrial I 9

MOD 63-85 MOD 100-240

10 I Pratt Industrial

Mounting flange dimension details (Inch)

Mod� N� T�

Bottom� o� f� shaft�

H� I� Key�

Mounting� Holes�

NO� X� Size� PCD(inch)�

63   0.56� 0.38� － － － 3.25�

85   0.76� 0.50� － － － 3.25�

100   0.76� 0.50� － － － 3.25�

125   － － 1.25� 1.13� 0.25� 3.25�

5.00�

140   － － 1.25� 1.13� 0.25� 3.25�

5.00�

160   － － 1.25� 1.13� 0.25� 5.00�

3.25�

190   － － 1.52� 1.38� 0.32� 5.00�

210   － － 2.06� 1.88� 0.50� 6.50�

5.00�

240   － － 2.06� 1.88� 0.50� 6.50�

4� X� 3/8� 16UNC� X0.5DP�

4� X� 3/8� 16UNC� X0.5DP�

4� X� 3/8� 16UNC� X0.5� DP�

4� X� 3/8� 16� UNC� X0.5DP�

4� X� 1/2� 13� UNC� X0.625DP�

4� X� 3/8� 16� UNC� X0.5� DP�

4� X� 1/2� 13� UNC� X0.625DP�

4� X� 1/2� 13� UNC� X0.625DP�

4� X� 3/8� 16� UNC� X0.5DP�

4� X� 1/2� 13� UNC� X0.625DP�

4� X� 3/4� 10� UNC� X1.00DP�

4� X� 1/2� 13� UNC� X0.625DP�

4  X  3/4i 10  UNC  X1.00DP��

OPERATION PRINCIPLE OF DOUBLE ACTING ACTUATOR

With reference to the above diagram it can be noted that the torque of a double acting actuator remains constant through-out the complete action. The user can decide on which model to choose according to his/her own specific requirements, using the following guidelines:

1. Define the maximum torque of the valve to automate. 2. To obtain a safety factor increase the torque value chosen by 25-50% (subject to the type of valve and working conditions).3. Once the torque value suggested is obtained consult the torque chart and in relation to the corresponding air pressure find a

torque value exact to or exceeding the one obtained. 4. Once the torque value is determined move horizontally to the column “model” to find the actuator model required.

Torq

ue

+5o

90o 90o

95o+5o

Closed position Opened position Closed position

Counterclockwise rotation

Rotation

TOP VIEW

Clockwise

ñ ñ

Pratt Industrial I 11

DOUBLE ACTING ACTUATOR TORQUE OUTPUT:

MOD Air Supply, PSI

40 50 60 70 80 90 100 120 Output torque, Inch LBS. DA63 164 205 246 287 328 369 410 492

DA85 434 543 652 760 869 977 1086 1303 DA100 676 845 1014 1184 1353 1522 1691 2029 DA125 1468 1835 2202 2568 2935 3302 3669 4403 DA140 2025 2531 3038 3544 4050 4557 5063 6076 DA160 3174 3968 4761 5555 6348 7142 7935 9522 DA190 4747 5934 7121 8308 9495 10681 11868 14242 DA210 6959 8699 10439 12179 13918 15658 17398 20878 DA240 10388 12985 14226 18179 20776 23373 25970 31164 DA270 12921 15045 20355 26550 29382 31949 37259 42480 DA300 17700 20523 28010 34515 37170 41330 48135 54959 DA350 26161 31241 41330 51480 56552 53640 71623 81818

12 I Pratt Industrial

OPERATION PRINCIPLE OF SPRING RETURN ACTUATOR:

VALID FROM MOD. 160 TO MOD. 240

SPRING SETTING

SET SPRINGS FOR EACH SIDE

S5 2/3S6 3/3S7 3/4S8 4/4S9 4/5S10 5/5S11 5/6

S12 6/6

VALID FROM MOD. 63 TO MOD. 140

SPRING SETTING

SET EXTERNAL SPRING INTERNAL SPRING

S1 1 1 S2 2 - S3 1 2 S4 2 1 S5 2 2

With reference to the above diagram the torque of a spring return actuator is not constant but decreasing. This is due to the action of the springs that when compressed during air actuation counteract the piston movement and accumulate energy which will be available in a decreasing way during the rotation inversion.The torque given by the actuator is defined by four fundamental values. Opening rotation(Press air working) Torque output at closed position (0o)= Actuator torque deducts unfolded springs torque Torque output at opened position (90o)= Actuator torque deducts compressed springs torque Closing rotation (Springs working) Torque output at opened position (90o)= compressed springs torque. Torque output at opened position (0o)= unfolded springs torque

The user can decide on which model to chose according to his/her own specific requirements, using the following guidelines: 1. Define the maximum torque of the valve to automate. 2. To obtain a safety factor increase the torque value chosen by 25-50% (subject to the type of valve and working conditions).3. Once the torque value suggested is obtained consult the torque chart and in relation to the corresponding air pressure find the torque

value exact to or exceeding the one obtained, taking account of the lower value between the opening and closing positiion values.4. Once the torque value is determined, move horizontally to the column “model” to find the actuator model required.

ñ

Torq

ue

Opened position Closed position Opened position

Closed position

Counterclockwise rotation Clockwise rotation Rotation

Press air working/ Opening rotation Springs working/Closing rotation

+5o

90o 90o

95o+5o

TOP VIEW

Pratt Industrial I 13

SPRING RETURN ACTUATOR TORQUE OUTPUT

14 I Pratt Industrial

MOD SR63~SR140

MOD�SPRING�SET�

SPRING�TORQUE�(Inch  LBS)  

Air� Supply,� PSI�

40� 50� 60� 70� 80� 90� 100� 120�

Output� Torque,Inch� LBS�00� 900�

00� 900� 00� 900 00� 900� 00� 900� 00� 900� 00� 900� 00� 900� 00� 900�

END� Start�Start� End� Start� End� Start� End� Start� End� Start� End� Start� End� Start� End� Start� End�

SR63� S1� 57� 105� 107� 59� 148� 100� 189� 141�

S2� 68� 132� 159� 73� 178� 114� 219� 155�

S3� 80� 144� 166� 102� 207� 143� 248� 184� 289� 225�

S4� 91� 171� 155� 75� 196� 116� 237� 157� 278� 198� 319� 239�

S5� 114� 210� 173� 77� 214� 118� 255� 159� 296� 200� 378� 282�

SR85� S1� 144� 263� 290� 171� 399� 280� 507� 388�

S2� 176� 314� 367� 173� 476� 337� 585� 497�

S3� 201� 370� 450� 282� 559� 391� 668� 499� 776� 608�

S4� 232� 421� 419� 231� 528� 340� 636� 448� 745� 557� 854� 665�

S5� 289� 527� 471� 233� 580� 342� 688� 451� 797� 559� 1014� 776�

SR100� S1� 242� 414� 434� 262� 603� 431� 772� 600�

S2� 303� 510� 543� 336� 712� 505� 881� 674�

S3� 333� 573� 682� 441� 851� 610� 1020� 779� 1189� 948�

S4� 393� 669� 621� 345� 790� 514� 959� 684� 1128� 853� 1297� 1022�

S5� 484� 828� 699� 355� 868� 524� 1037� 693� 1207� 862� 1545� 1201�

SR125� S1� 504� 973� 963� 494� 1330� 861� 1697� 1228�

S2� 597� 1151� 1817� 684� 1604� 1051� 1971� 1418�

S3� 710� 1371� 1492� 830� 1859� 1197� 2226� 1564� 2593� 1931�

S4� 803� 1549� 1399� 653� 1765� 1387� 2132� 1387� 2499� 1754� 2866� 2121�

S5� 1008� 1947� 1560� 989� 1927� 989� 2294� 1356� 2661� 1723� 3395� 2456�

SR140� S1� 727� 1352� 1298� 673� 1804� 1179� 2311� 1685�

S2� 838� 1527� 1694� 1004� 2200� 1511� 2706� 2017�

S3� 1036� 1941� 1496� 590� 2002� 1096� 2508� 1603� 3015� 2109� 3521� 2615�

S4� 1146� 2116� 1892� 922� 2398� 1428� 2904� 1934� 3411� 2441� 3917� 2947�

S5� 1454� 2705� 2090� 839� 2596� 1345� 3102� 1852� 3608� 2358� 4621� 3371�

SPRING RETURN ACTUATOR TORQUE OUTPUT

Pratt Industrial I 15

MOD SR160~SR240

MOD�SPRING�SET�

SPRING� TORQUE�(Inch� LBS)�

Air  Supply,  PSI  40.0� 50� 60� 70� 80.0� 90� 100� 120�

Output  Torque,Inch  LBS  0º� 90º� 0º� 90º� 0º� 90º� 0º� 90º� 0º� 90º� 0º� 90º� 0º� 90º� 0º� 90º� 0º� 90º�

END� Start� Start� End� Start� End� Start� End� Start� End� Start� End� Start� End� Start� End� Start� End�

SR160�

S5� 1164� 1732� 2010� 1442� 2804� 2235� 3597� 3029�

S6� 1397� 2079� 1777� 1095� 2571� 1889� 3364� 2682� 4158� 3476�

S7� 1630� 2425� 1544� 749� 2338� 1542� 3131� 2336� 3925� 3129� 4719� 3923�

S8� 1863� 2772� 2105� 1196� 2899� 1989� 3692� 2783� 4486� 3576� 5279� 4370� 6073� 5163�

S9� 2095� 3118� 2666� 1643� 3459� 2436� 4253� 3230� 5046� 4023� 5840� 4817�

S10� 2328� 3465� 2433� 1296� 3227� 2090� 4020� 2883� 4814� 3677� 5607� 4470� 7194� 6057�

S11� 2561� 3811� 2994� 1743� 3787� 2537� 4581� 3330� 5374� 4124� 6961� 5711�

S12� 2794� 4158� 2761� 1397� 3554� 2190� 4348� 2984� 5141� 3777� 6729� 5364�

SR190�

S5� 1729� 2502� 3018� 2245� 4205� 3432� 5392� 4619�

S6� 2075� 3003� 2672� 1745� 3859� 2932� 5046� 4118� 6233� 5305�

S7� 2421� 3503� 2326� 1244� 3513� 2431� 4700� 3618� 5887� 4805� 7074� 5992�

S8� 2767� 4003� 3167� 1931� 4354� 3117� 5541� 4304� 6728� 5491� 7914� 6678�

S9� 3113� 4504� 4008� 2617� 5195� 3804� 6382� 4991� 7569� 6178� 8755� 7364�

S10� 3459� 5004� 3662� 2117� 4849� 3303� 6036� 4490� 7223� 5677� 8410� 6864� 10783� 9238�

S11� 3805� 5505� 4503� 2803� 5690� 3990� 6877� 5177� 8064� 6363� 10437� 8737�

S12� 4150� 6005� 4157� 2303� 5344� 3489� 6531� 4676� 7718� 5863� 10091� 8237�

2SR10�

S5� 2688� 3789� 4271� 3170� 6011� 4910� 7751� 6650�

S6� 3225� 4547� 3734� 2413� 5474� 4152� 7214� 5892� 8953�

S7� 3763� 5304� 3196� 1655� 4936� 3395� 6676� 5134� 8416� 6874� 10156� 8614�

S8� 4300� 6062� 4399� 2637� 6138� 4377� 7878� 6116� 9618� 7856� 11358� 9596�

S9� 4838� 6820� 5601� 3619� 7341� 5359� 9081� 7098� 10820� 8838� 12560� 10578�

S10� 5375� 7578� 5063� 2861� 6803� 4601� 8543� 6341� 10283� 8080� 12023� 9820� 15502� 13300�

S11� 5913� 8335� 6266� 3843� 8005� 5583� 9745� 7323� 11485� 9062� 14965� 12542�

S12� 6450� 9093� 5728� 3085� 7468� 4825� 9208� 6565� 10948� 8305� 14427� 11784�

SR240�

S5� 3901� 5401� 6487� 4987� 9084� 7584� 10325� 8825�

S6� 4681� 6481� 5707� 3907� 8304� 6504� 9545� 7745� 13498� 11698�

S7� 5462� 7562� 4926� 2826� 7523� 5423� 8764� 6664� 12717� 10617� 15314� 13214�

S8� 6242� 8642� 6743� 4343� 7984� 5584� 11937� 9537� 14534� 12134� 17131� 14731�

S9� 7022� 9722� 7204� 4504� 11157� 8457� 13754� 11054� 16351� 13651� 18948� 16248�

S10� 7802� 10802� 6424� 3424� 10377� 7377� 12974� 9974� 15571� 12571� 18168� 15168� 23362� 20362�

S11� 8583� 11883� 9596� 6297� 12193� 8894� 14790� 11491� 17387� 14088� 22582� 19282�

S12� 9363� 12963� 8816� 5216� 11413� 7813� 14010� 10410� 16607� 13007� 21801� 18201�

Pratt IndustrialEmporia, Kansas

Tel. 620-208-8100Fax. 620-208-8111www.prattindl.com

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