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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
© 2014 CAM Valve and Automation, LLC I Printed in the U.S.A. I PI-SY-1014