►Products > Series SV-Pneumatic Rack and Pinion Actuator
 
     

 
 
 		  


 

  • Rack and Pinion Design
  • The standard actuator configuration has hard anodized aluminum body and epoxy coated caps. External protection; resistance to corrosion of 500 hours in salty atmosphere, according to ASTM B 117-73
  • Inside Surface finish( Ra 0.4-6.6um) to minimize friction and to maximize the life of actuator.
  • Standard Applications for temperature ranges from -4ºF    (-20ºC) to +180ºF (85ºC)
  • Special options for extreme temperatures ( upon request)SimCo Valves-AIR Series Pneumatic Actuators
  • Piston bearing made of material with low friction coefficient (LAT LUB) to avoid metal to metal contact, easily replaceable for maintenance.
  • Double lower drilling, for valve mounting, and centering, according to ISO 5211/DIN 3337 standards.
  • Top drilling for fastening of the accessories and upper shaft end according to NAMUR standards.
  • Direct mounted solenoid connections according to NAMUR standards
  • Independent travel stop adjustment of 4 º in both directions.
  • Lower female shaft key, according to ISO 5211/ DIN 3337 standards, for assembly on valves with star shaft.
  • Same body and end cap for double acting and Spring return.
  • Air supply: dry or lubricated filtered compressed air; pressure: min. 14.5 PSI-145 PSI
  • The Lubrication carried out by the manufacturer is guaranteed for min 1,000.000 operations.
  • Running test and 100% seal test carried out with electronic equipment and certification of each product.
  • Position indicator.
 
 
Part No. QTY. Description

Materials of Construction
Body Aluminum alloy, extruded according to ASTM 6063, anodized according to UNI 4522
End Cap Die-Cast in aluminum alloy ASTM B179, painted with epoxy-polyester powder.
Pistons Die-Cast in aluminum alloy ASTM B179.
Pinion Nickel-plated steel.
Pinion Bearings Acetal Resin (LAT LUB 731 320T) + 20% PTFE.
Screws Stainless steel AISI 304
Springs Precompressed cartridge, painted with epoxy powder.
Seals Nitrile rubber NBR (VITON or EPDM on request).
Standard Grease MoS2.
Optional Grease Molykote.

SimCo Valves-AIR Series Pneumatic Actuators - Parts and Identification
1 1 Body
2 2 Piston
3 2 End Cap
4 1 Pinion
5 2 Piston Pilot Key
6 1 Pinion Lower O-Ring
7 1 Pinion Upper O-Ring
10 1 Retaining Ring
11 6-12 Spring Cartridge
12 2 Piston O-Ring
13 2 Piston Bearing
14 2 End Cap Gasket
15 1 Name Plate
16 8 End Cap Screw
17 4 Nut
18 4 Washer
19 4 O-Ring
21 2 Travel Stop
23 1 Pinion Thrust Washer
24 1 Thrust Bearing
25 1 Lower Pinion Bearing
26 1 Upper Pinion Bearing
27 2 Piston Bearing
28   Piston Screw
 

Optional Corrosion Protections

Coating with Chemical Nickel Having High Phosphorous Content
Nickel Deposits without electricity are produced by the chemical reaction of nickel in metallic substrate, without using electricity. Dead holes, threads, grooves, recesses or inside surfaces receive the same plating quantity as the sharp angles, the corners or the flat surface(20-30 um). The standard degree is approximately 45-55 Rockwell C and offers a good resistance to corrosion in salty fog. Please take care not to damage the surface by scraping, since this exposes the basic material to corrosion. ( on request, the pistons may also be nickel coated.)   

Strong Anodized Protection
The electrical process produces a thick anodized coating up to 50 microns. The resulting part resists corrosion from dipping and SVrays of sodium and chlorine and also corrosive cracking stress. The oxide coating is perfectly adherent and will not chip, even after sudden temperature changes or at temperatures equal to aluminum melting point. Aluminum oxide is one of the hardest known materials: 45-65 Rockwell C.

Epoxy-Polyester Coating
Epoxy coating is a deposit of powders on clean and sandblasted pieces. The chemical process is easily kept under control after coating, the pieces must be subjected to heat treatment. Epoxy painting of actuators is advised where environment is strongly aggressive. With a normal thickness of 200?250 microns of epoxy coating, resistance to salty fog exceeds 1,000 hours. With the exception of certain solvents, epoxy coating must not be scratched. ( Springs have standard coating.)
   

Actuation Sizing Guide

The seat material used, media, temperature, frequency of operation and criticality of the valve's operation are all important factors in calculating the actuation needs of a given valve. The information provided below should be considered as a guide only and must be adjusted according to experience and judgment. Proper actuator selection is required to prevent valve or process equipment damage as well as proper valve operation.

In general, we can say that valve torque results from the friction between the ball and seats as well as the stem and stem seals.
Valve Torque

The torque requirements of SimCo Ball Valves will vary depending on several factors.

  • Seat design and material

SimCo seats are designed to ensure consistent sealing and low torque. The seat friction force depends on the seat material and the applicable service factor multipliers shown in the chart below

  • Stem Seal

Torque results from the stem contact with stem seals. Packing materials affect torque. Stem seal torque is a high percentage of overall torque especially in small valve sizes.
Service Conditions 
  • Differential Pressure                   Minimum and maximum pressures
  • Frequency of Operation              Stuck valve torque
  • Media Influence                            Slurries, dry gases, oils
  • Temperatures                               Minimum and maximums
  • Cycle Time                                     Line hammer, process requirements
  • Instrument Air Supply                 Peak demand pressure availability
Media and Service Factors
 To establish minimum torque requirements, multiply valve torque by following application media and service factors.
 
   
   
Media Factors Multiplier
Clean particle free, non-lubricating (water, alcohol or solvents) 1.00
Clean particle free, lubricating oil .80
Slurries or heavily corroded and contaminated systems 1.30 to 2.00
Gas or saturated steam, clean and wet 1.00
Gas or superheated steam, clean and dry 1.30
Gas, dirty unfiltered e.g. natural gas, Chlorine 1.20 to 1.50
Service Multiplier
Simple On and Off Operations 1.00
Throttling 1.20
Positioner Control 1.50
Once per day session 1.20
Once every two days or more or plant critical 1.50
 
Service Multiplier
Simple On and Off Operations 1.00
Throttling 1.20
Positioner Control 1.50
Once per day session 1.20
Once every two days or more or plant critical 1.50
 
   
Ball Valve

Ball valve construction concept is based essentially on a polished ball (including a through port) contained in two seats (upstream and downstream). The ball rotation allows the flow or stops the flow through the valve. Differential pressure between upstream and downstream pressure forces the ball against the downstream seat (floating ball). In this case, the valve torque is generated by the friction between ball and seat and also between stem and packing. As shown in the diagram to the right the highest torque point is when, in presence of pressure, the valve is in the closed position, and passes to the open position (breakaway torque).		 SimCo-AIR Series Pneumatic Actuators
Butterfly Valve
Butterfly valve construction concept is based essentially on a disc fixed on an axis, which in the closed position, is completely contained by the seat. The open position is obtained when, with a rotation, the disc (through its stem) becomes parallel to the flow. On the contrary, the closed position is obtained when the disc is perpendicular to the flow. In the case of the butterfly valve, the torque is generated by the friction between the disc and the seat, by the stem packing and also by the differential pressure that forces on the disc. The highest torque point, as shown in the diagram, is in the closed position, and only after a small rotation it is considerably reduced.
 		 SimCo-AIR Series Pneumatic Actuators
Plug Valve

Plug valve construction concept is based essentially on a male (plug) contained in a female cone (seat). The plug provides a through port in one direction and with its rotation into the seat the opening and closure of the valve is obtained. The torque is usually not influenced by the flow pressure, but is generated essentially by the friction between the seat and the plug, during the opening and closing cycle. As shown in the diagram to the right, the highest torque point is in the closed position and remains high for the rest of the operation, because the torque is not influenced by pressure.		 Sharpe Valves SP-AIR Series Pneumatic Actuators
Double Acting Actuator (DA)

In the double acting actuators, the control pinion rotation and its reversal are obtained by reversing the supply to the two input ports. The output torques obtainable mainly depend on the cylinder diameter and the supply pressure; by increasing on or both factors the available torque also increases. The friction should usually be negligible. As shown in diagram A, the torque of a DA actuator is constant throughout the entire rotation and relevant reversal. The advised safety factor, in addition to the valve maneuver torque, is approximately 20%.

*Select the actuator size whose torque output at given pressure exceeds the valve torque and application factor.

 Simco-AIR Series Pneumatic Actuators

 

  

SimCo-AIR Series Pneumatic Actuators - Operation

  
   
Reverse Rotation
Upon request, the pistons can be inverted in order to obtain a clockwise rotation when the air pressure is applied to Port A. Other types of assembly are possible: for any information, please contact SimCo Valves.
Quick Operation Actuators
Upon request, SV-AIR Series actuators can be specially prepared for fast response operations.
 
   

Spring Return Actuator (SR)
In these types of actuators, which utilize springs for reversing the rotation of the control pinion, the output torque depends not only on the cylinder diameter and the supply pressure, but also on the presence of the springs, which should be compressed to guarantee the return. As shown in diagram C, the available torque at 0° progressively reduces during the rotation due to the springs' compression. On the contrary, as shown in Diagram D, the torque starting from the 90° position constantly decreases until 0° because of spring extension. Owing to the higher friction present, the safety coefficient advised in this case is approximately 25%.

*Select the actuator whose torque output at 0° and 90° at a given air pressure exceeds the valve torque.
 
Upon request, the pistons can be inverted in order to obtain a clockwise rotation when the air pressure is applied to Port A. Other types of assembly are possible: for any information, please contact SimCo.
 
Quick Operation Actuators
Upon request, SV-AIR Series actuators can be Specially prepared for fast response operations.

  
Installation
  • Make sure that the actuator, when fitted on the valve, is well aligned with the valve stem. When actuator is directly fitted with bracket and coupling, all parts must be precisely machined.
  • In Spring return applications, the exhaust air port must be very well vented.
  • Accessories, if any, must be mounted in a proper manner to allow unobstructed operation of the actuator.


 
Maintenance
  1. Remove the end cap screws of the end cap.
  2. Take off the end cap.
  3. Turn the pinion in clockwise direction so that the pistons come out of the body.
  4. Remove the retaining ring.
  5. Take the pinion out from the lower part of the body by simply pressing it with your fingers.
  6. Replace the following parts:
    On the pistons:
    2 O-Rings; 2 bearings; 2 keys; 2 piston bearings; 2 O-Rings.
    On the heads:
    2 gaskets; 2 O-Rings.
    On the pinion:
    2 O-Rings; 1 bearing; 1 lower bearing; 1 upper bearing; 1 pinion thrust washer.
 
 

Dimensions (inches)

POSITION

ACTUATOR TYPE
SVO32 SV050 SVO63 SV075 SVO85 SV100 SV115 SV125 SV145 SV160 SV200 SV270
a 4.61 5.43 6.12 8.27 8.97 11.04 12.2 14.25 15.35 18.19 22.63 26.97
b 1.77 2.63 3.27 3.94 4.33 4.92 5.60 6.10 6.89 7.72 9.45 13.07
c 1.77 2.68 3.38 3.70 4.90 4.72 5.27 5.55 6.41 6.93 8.66 13.86
d --- --- --- 4.13 4.13 4.13 5.47 5.47 5.47 5.47 5.47 ---
e --- --- --- 0.87 0.87 0.87 0.87 0.87 0.87 0.87 0.87 ---
f 1.97 3.15 3.15 3.15 3.15 3.15 35.12 5.12 5.12 5.12 5.12 5.12
g 0.98 1.18 1.18 1.18 1.18 1.18 1.18 1.18 1.18 1.18 1.18 1.18
h --- 1.18 1.38 1.38 1.57 2.16 2.16 2.16 2.75 2.95 3.94 4.09
I 0.39 0.51 0.63 0.79 0.79 0.98 0.98 1.18 1.18 1.18 1.45 1.45
l 0.88 1.32 1.50 1.67 1.93 2.16 2.50 2.74 3.14 3.46 4.33 6.53
m 0.88 1.63 1.89 2.03 2.16 2.56 2.77 2.81 3.26 3.46 4.33 6.53
T-din 259 1/8" 1/8" 1/4" 1/4" 1/4" 1/4" 1/4" 1/4" 1/4" 1/4" 1/4" 1/2"
n 0.31 0.31 0.31 0.55 0.55 0.55 1.06 1.06 1.06 1.06 1.26 2.16
o 0.47 0.47 0.47 0.71 0.71 0.71 1.42 1.42 1.42 1.42 1.65 3.15
p 0.79 0.79 0.79 0.79 0.79 0.79 1.18 1.18 1.18 1.97 1.97 1.97
r 0.47 0.47 0.47 0.47 0.47 0.47 0.47 0.47 0.47 0.47 0.47 ---
s 0.63 0.63 0.63 0.63 0.63 0.63 0.63 0.63 0.63 0.63 0.63 ---
diam 0 1.42 1.65 1.97 1.97/2.76 1.97/2.76 2.76/4.02 2.76/4.02 2.76/4.02 2.76/4.02 4.02/4.92 5.51 5.51
Q 0.35 0.43 0.55 0.67 0.67 0.87 0.87 1.06 1.06 1.06 1.42 1.42
w M5 M5 M6 M6-M8 M6-M8 M8-M10 M8-M10 M8-M10 M10-M12 M10-M12 M16 M16
ISO 5211 F03 F04 F05 F05-F07 F05/F07 F07/F10 F07/F10 F07-F10 F10-F12 F10/F12 F12-F14 F14-F16
   

VALUE

ACTUATOR TYPE
SVO32 SV050 SV063 SV075 SV085 SV100
DA SR DA SR DA SR DA SR DA SR DA SR
Volume IT. 0.07 --- 0.23 --- 0.45 --- 0.61 --- 0.98 --- 1.80 ---
open SEC. 0.50 --- 0.60 0.60 0.60 0.70 0.60 0.70 0.60 0.70 0.80 1.10
Closed SEC. 0.50 --- 0.60 0.60 0.70 0.90 0.70 1.00 0.90 1.30 0.90 1.30
Weight SEC. 0.92 --- 2.30 2.64 3.50 4.00 6.40 7.50 9.25 10.60 12.75 15.00
 

VALUE

ACTUATOR TYPE
SV115 SV125 SV145 SV160 SV200 SV270
DA SR DA SR DA SR DA SR DA SR DA SR
Volume IT. 2.80 --- 3.70 --- 4.90 --- 8.00 --- 14.20 --- 22.20 ---
open SEC. 0.90 1.20 1.10 1.30 1.10 1.40 1.30 2.10 3.60 4.60 4.50 6.00
Closed SEC. 1.10 1.60 1.10 2.10 1.40 2.00 1.60 2.60 4.60 6.10 4.50 6.00
Weight SEC. 20.25 22.60 26.20 31.25 34.00 41.80 45.10 54.80 94.60 116.6 260.8 248.6
 

Actuator Model

Double Acting Torque Rating (LB - IN)

Air Supply in P.S.I
40 P.S.I. 50 P.S.I. 60 P.S.I. 70 P.S.I. 80 P.S.I. 90 P.S.I. 100 P.S.I.
SV 032 DA --- --- 45 53 61 69 77
SV 050 DA 74 93 112 131 150 169 187
SV 063 DA 134 168 202 235 267 300 333
SV 075 DA 285 357 428 499 570 642 714
SV 085 DA 433 543 653 760 867 978 1088
SV 100 DA 661 839 1016 1184 1351 1523 1694
SV 115 DA 1114 1241 1368 1799 2229 2512 2794
SV125 DA 1465 1950 2435 2684 2932 3304 3676
SV 145 DA 2128 2666 3204 3731 4257 4798 5338
SV 160 DA 2883 3613 4343 5055 5766 6499 7231
SV 200 DA 5405 6772 8138 9475 10812 12184 13556
SV 270 DA 13239 16585 19930 23204 26478 29839 33200
 

ACTUATOR
MODEL

 #
SPRINGS
EACH SIDE		 Spring Return Torque Ratings (lB - IN)

AIR SUPPLY IN P.S.I.

 Spring Stroke
40 P.S.I. 50 P.S.I. 60 P.S.I. 70 P.S.I. 80 P.S.I. 90 P.S.I. 100 P.S.I.
AIR START AIR END AIR START AIR END AIR START AIR END AIR START AIR END AIR START AIR END AIR START AIR END AIR START AIR END SPRING START SPRING END
SV 050 SR 3
4
5
6		 46 28 68
58		 50
35		 81
70		 60
42		 102
92
82
71		 82
65
49
33		 120
109
98
88		 98
82
65
48		 138
127
116
105		 116
98
81
64		 158
147
137
117		 136
120
103
86		 50
68
85
101		 31
41
51
62
SV 063 SR 3
4
5
6		 76 51 113
94		 89
63		 136
118		 107
76		 174
152
131
111		 147
118
88
59		 229
206
185
164		 176
146
116
68		 288
264
242
220		 208
176
145
114		 329
299
278
251		 246
216
186
157		 90
121
141
181		 63
86
107
128
SV 075 SR 3
4
5
6		 183 107 261
229		 186
129		 313
274		 223
154		 393
357
321
285		 308
244
180
116		 459
422
385
347		 371
305
238
172		 528
490
451
413		 438
337
300
231		 605
569
533
495		 486
410
334
257		 199
265
333
393		 111
149
186
224
SV 085 SR 3
4
5
6		 281 154 400
351		 280
192		 480
422		 336
230		 600
546
492
440		 466
367
269
171		 700
615
589
534		 561
459
358
256		 806
748
691
633		 662
557
451
346		 925
865
815
755		 786
686
585
485		 305
408
510
612		 167
223
279
334
SV 100 SR 3
4
5
6		 433 244 617
541		 440
305		 740
640		 528
366		 929
844
758
673		 730
579
427
276		 1086
997
908
820		 879
722
565
408		 1249
1158
1066
975		 1036
874
711
549		 1432
1341
1263
1170		 1228
1074
919
765		 471
628
785
942		 265
354
443
532
SV 115 SR 3
4
5
6		 686 431 993
857		 754
539		 1181
1029		 905
647		 1504
1352
1201
1049		 1235
995
755
515		 1761
1604
1447
1290		 1483
1234
985
736		 2030
1868
1706
1544		 1744
1486
1228
971		 2333
2178
2024
1869		 2060
1814
1569
1324		 746
955
1244
1493		 469
626
782
939
SV 125 SR 3
4
5
6		 951 518 1351
1187		 946
649		 1622
1424		 1135
779		 2029
1847
1665
1483		 1574
1241
909
576		 2369
2181
1992
1803		 1898
1544
1208
863		 2726
2531
2335
2141		 2238
1881
1524
1168		 3121
2935
2749
2563		 2656
2316
1977
1637		 1035
1377
1725
2070		 564
753
941
1130
SV 145 SR 3
4
5
6		 1297 755 1885
1624		 1377
946		 2262
1948		 1653
1135		 2861
2569
2275
1983		 2284
1810
1327
844		 3346
3043
2739
2435		 2754
2138
1759
1259		 3860
3547
3232
2918		 3251
2484
2216
1699		 4442
4142
3844
3544		 3862
3369
2876
2456		 1500
2000
2500
3000		 910
1219
1518
1871
SV 160 SR 3
4
5
6		 1811 1080 2602
2264		 1917
1350		 3123
2717		 2300
1621		 3927
3546
3170
2793		 3159
2524
1891
1257		 4592
3140
2483
3417		 3796
3140
2483
1827		 5292
4886
4482
4076		 4468
3790
3110
2432		 6072
5686
5301
4915		 5288
4642
3995
3348		 1970
2627
3284
3941		 1175
1567
1959
2351
SV 200 SR 3
4
5
6		 3451 2225 2924
4313		 3542
2463		 5908
5116		 4250
2956		 7419
6729
6039
5348		 5866
4658
3450
2242		 8667
7951
7237
6523		 7059
5808
4557
3306		 9981
9238
8502
7764		 8319
7025
5731
4436		 11413
10716
10038
9331		 9864
9627
7395
6162		 3753
5001
6255
7506		 2420
2858
3574
4289
SV 270 SR 3
4
5
6		 7491 5788 10896
9441		 9574
7236		 13075
11329		 11489
8683		 17163
15137
13110
11084		 15374
12753
10130
7508		 20182
18084
15986
13887		 18331
15526
12899
10183		 23368
21198
19028
16856		 21453
18644
15834
13025		 26999
24982
22865
20717		 25174
22499
18863
17185		 8147
10952
13579
16295		 6295
8394
10492
12591

 
ACTUATOR MODEL DOUBLE ACTING SPRING RETURN NO.OF SPRINGS PER SIDE OF PISTON OPTIONS
SV032
SV050
SV063
SV075
SV085
SV100
SV115
SV125
SV145
SV160
SV200
SV270		 DA SR

3
4
5
6

 1= High Temperature Actuator
2= Coating with Chemical Nickel
3= Strong Anodized
4= Epoxy Coatings
 
 
Due to continuous product development, information may change without notice.  
     

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