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Forbes Marshall Forbes Marshall Arca Forbes Marshall Codel J N Marshall Krohne Marshall Spirax Marshall Forbes Vyncke

Control and On/Off Valves

Quality Engineered Control Valves

Maximum technology, minimum maintenance

For over six decades, Forbes Marshall has been building steam engineering and control instrumentation solutions that work for process industry. Today we have evolved into a leader in process efficiency and energy conservation through technology tie-ups and focused investments in manufacturing and research. Our joint ventures with the world’s leading names enable us to deliver quality solutions in 14 countries. Forbes Marshall is probably the only company in the world to have extensive expertise in both steam and control instrumentation. The dual expertise has allowed us to engineer industry specific systems that focus on energy efficiency and utilities management for sectors as diverse as textiles, food processing, paper, power and chemicals.

Our teams are peopled by some of the finest engineers in the land. These highly trained professionals have developed innovative solutions and saved millions of rupees in process costs for our clients. Our business practices and processes have combined into a singular philosophy of being trusted partners who provide innovative solutions. It’s a philosophy we are proud to live up to.

For decades, we have partnered with some of the best names in the control instrumentation industry such as Arca, Codel, Krohne and Shinkawa, to develop, design and supply innovative solutions for measurement and monitoring of process

parameters. With a combination of specialist knowledge and the latest technology, we provide products and solutions to achieve optimum efficiency. Our products are a unique combination of hardware and software that make them reliable and accurate. Forbes Marshall ranks amongst the world's leading suppliers of Combined PRDS valves. We specialize in designing and manufacturing such equipment for power, process and co-generation plants. Forbes Marshall has supplied more than 6000 combined Pressure Reducing and Desuperheating System since 1990.

Forbes Marshall control valves and actuators are designed to cater to a variety of industrial control applications like steam, liquids and gases.

Forbes Marshall valves are modular in design and versatile in construction. They are designed and manufactured using advanced CNC machinery, thus making them virtually trouble-free to operate with minimum maintenance. Coupled with single spring and multi-spring diaphragm actuators, control valve series 100, 140 and 160 provide complete control solutions to most critical service conditions.

Our well-trained representatives are ready to help you select, size and install the most appropriate valve for your service.

ANSI 150 - ANSI 1500Ends Flanged/Butt weld/Socket weld and NPT(F)

• Standard parabolic plug• Multistep perforated plug for

high differential pressure• Pressure balanced plug for

high actuator thrust forces• Linear, Equal Percentage, and

Modified Parabolic characterised trim as standard options.

Positioner• Pneumatic• Electro-pneumatic• Smart with HART, PROFIBUS

and FIELDBUS protocolsNamur mounting possible to avoid tubing

Air to open or air to close Actuator Single spring (U-Series) andMultiple spring (MF-Series)

Threaded and quick change trim options available

Soft seat option for bubble-tight (Class VI) shut-off available upon request.

Spring steel springs suitable for upto 1 million cycles

Stem ground, roller burnished for optimal matching with packing

SG Iron / Cast Iron Yoke for actuator mounting

Diaphragm purbunan rubber with nylon mesh reinforcement

What is a control valve ?

Process plants consist of thousands of control loops all

networked together to produce a product to be offered for sale.

Each of these control loops is designed to keep some important

process variable such as pressure, flow, level, temperature, etc.,

within a required operating range to ensure quality of the end

product. Each of these are affected by load disturbances

occurring in other loops of the network. As a result of this

interaction, the process variable is likely to be detrimentally

influenced.

To reduce the effect of these load disturbances, sensors and

transmitters collect information about the process variable and

its relationship to some desired set point. A controller then

processes this information and decides what must be done to

get the process variable back to where it should be after the

load disturbance occurs. When all the measuring, comparing

and calculating are done, some type of final control element

must implement the strategy selected by the controller.

The most common final control element in process control

industries is the control valve. The control valve manipulates a

flowing fluid such as gas, steam, water, chemical compound to

compensate for the load disturbance and keep the regulated

process variable as close as possible to the desired set point.

Series 100

Applied for decades

The series 100 is the standard globe design control valve with

pneumatic or electric actuator with a lot of extension possibilities

and a wide range of applications. The basic equipment is fitted

with a parabolic plug and strong high capacity shaft guiding and

serves at the same time as basis for multiple types of execution.

The present generation of the series 100 has been updated as a

result of decades of development. Production on most modern

CNC machining centres guarantees the highest precision and

simple exchange of parts. The body design is optimized to flow

conditions with large volume and possibility to install low-noise

trims.

The seats are not welded and can be unscrewed and serviced

even after years of operation. Exchanging of seat and plug can

be completed within 15 minutes. During maintenance, the valve

remains in the pipeline. This saves cost during maintenance and

installation. Capacity can easily be adapted to any modication,

extension due to modular design.

Series 140

For critical applications

The series 140 is applied where high differential pressure and

critical operating conditions require a double-guided valve. The

standard series 140 valve comprises of the parabolic plug with

high loadable shaft guiding on both sides. The plug thereby

remains balanced at high differential pressures. Further, the

modular construction allows the mounting of pneumatic or

electric actuators.

Exchangeable trims, parabolic or perforated, single or multistep

(by choice) during sizing or selection, can be provided on

request.

Applicable standards

Design ANSI B16.34

Flanges ANSI B16.5

F/F Distance ANSI B16.10

Leakage Class ANSI B16.104 FCI70.2

Valve Technical Information

Body / Bonnet Carbon steel, alloy steel, stainless steel. Other materials such as monel, hastalloy, alloy - 20,

Aluminium, Bronze, etc. available on request

Plug Stainless steel - AISI 410, 316, 304, 316L, 304L, 17-4PH, F22, SS321, SS440C and others available on request

Seat Stainless steel - AISI 410, 316, 304, 316L, 304L, 17-4PH, F22, SS321, SS440C and others available on request

Spindle Stainless steel - AISI 410, 316, 304, 316L, 304L, 17-4PH, F22, SS321, SS440C and others available on request

Nitriding / Stelliting Standard for high differential pressure applications

Gland rings Graphite (above 180 Deg C) for steam applications; PTFE for liquid applications

Bonnet Gasket Graphite (upto ANSI Classes 150 and 300); Spiral wound (Class 600, 900 and 1500)

Leakage Class As per ANSI B16.104 / FCI 70.2

Standard Finish Leakage class IV, 0.01% of rated Kv

Ground Finish Leakage class V, 0.005% of rated Kv

Soft seating Leakage Class VI, 0.0001% of rated Kv

Flow characteristics Linear, equal percentage, modied linear. Other specials available on request

Extended Bonnet Temperatures > 300º C

Standard Bonnet Temperatures < 300º C

Series 100 Single seat, 3 flanged control valve body

For all standard flow control, pressure control and ON / OFF applications.

Forbes Marshall series 100 valve bodies are designed for all standard industrial control applications

in Carbon steel, Alloy steel and Stainless steel materials. They are manufactured using advanced

automatic forging and casting techniques to ensure high quality and precision. Basic valves are

equipped with parabolic plugs and high capacity shaft guiding. Cage guided perforated plug and

silencer baskets are offered for critical pressure drops. Series 100 valve bodies can be fitted with

MSA and U series pneumatic actuators for a variety of applications.

Applicable standards

Design ANSI B16.34

Flanges ANSI B16.5

Leakage Class ANSI B16.104FCI70.2

A

C1

/C2

B

*C1 - with cooling fins*C2 - without cooling fins

Dimensions

6

11

10

9

12

8

15

2

13

7

14

5

4

3

1

Sr No. Description

1 Valve Body (3 Flange)

2 Top Flange

3 Seat4 Plug

5 Ball6 Spindle

7 Spring Dowell Pin

8 Bottom Ring

Bill of material

Sr No. Description

9 Gland Packing Rings

10 Gland Follower

11 Gland Nut12 Slotted Nut

13 Gasket Top14 Guide Bush

15 Stud & Nut

Fig. 1

Size Size RATING A A B B C1 (NB) (Inch) mm Inch mm Inch Cooling Fins) Cooling Fins) Cooling Fins) Cooling Fins) Kgs Lbs

mm Inch mm Inch

15 I/2 300 190 7.5 45.3 1.8 166 6.5 76 3.0 7 15.4

25 1 150 184 7.2 45.3 1.8 166 6.5 76 3.0 6 13.2

300 197 7.8 65 2.6 166 6.5 81 3.2 8 17.6

40 1.5 150 222 8.7 68 2.7 181 7.1 91 3.6 17 37.4

300 235 9.3 80 3.1 179 7.0 89 3.5 22 48.5

50 2 150 254 10.0 92.5 3.6 225 8.9 121 4.8 19 41.8

300 267 10.5 100 3.9 225 8.9 121 4.8 31 68.3

80 3 150 242 9.5 100 3.9 247 9.7 142 5.6 25 55.1

300 317 12.5 105 4.1 247 9.7 142 5.6 50 110.2

100 4 150 292 11.5 130 5.1 257 10.1 155 6.1 35 77.1

300 369 14.5 134 5.3 257 10.1 152 6.0 71 156.5

150 6 150 406 16.0 180 7.1 334 13.1 203 8.0 90 198.4

300 473 18.6 182 7.2 339 13.3 213 8.4 132 291

200 8 150 543 21.4 225 8.9 369 14.5 243 9.6 125 275.5

300 568 22.4 220 8.7 245 9.6 244 9.6 200 440.9

300 12 300 775 30.5 310 12.2 388 15.3 388 15.3 850 1873.9

350 14 300 928.5 36.6 390 15.4 452 17.8 452 17.8 1515 3340

400 16 300 1057 41.6 427 16.8 502 19.8 502 19.8 1825 4023.4

(With C1 (With C2 (Without C2 (Without Weight Weight

Note: 300, 350, 400 flanges machined to #150

B

A

C1/C

2

*C1- with cooling fins*C2 - without cooling fins

Dimensions

Applicable standards

Series 110 / 120 / 130 / 140 / 160 - Single seat control valve, 3 flange and 4 flange body

For critical pressure control and flow control applications.

Forbes Marshall - Series 110 / 120 / 130 / 140 / 160 valves are designed for use in applications

with high pressure drops and critical operating conditions. Its parabolic plug with high loadable

shaft guiding on top and bottom makes these suitable for extreme operating conditions.

Optional cage guided multi-step perforated plugs and low noise silencer baskets make these

valves suitable for use in super-critical pressure drops. This trim design ensures cavitation free

operation with sub-critical pressure reduction. Series 110 / 120 / 130 / 140 / 160 valves can be

fitted with a variety of actuator options including MSA and U series pneumatic actuators. Electric

actuators can also be custom built with these valves for your application needs.

7

12

11

10

13

9

16

2

14

8

15

6

5

4

1

3

Design ANSI B16.34

Flanges ANSI B16.5

Leakage Class ANSI B16.104FCI70.2

Sr No. Description

1

2

34

56

7

8

Bill of material

Sr No. Description

9

10

1112

1314

15

Valve Body (4 Flange)

Bottom Flange

Slotted Nut

Top Flange

Seat

Plug

Ball

Spindle

Spring Dowell Pin

Bottom Ring

Gland Packing Rings

Gland Follower

Gland Nut

Gasket Top

Guide Bush

Stud & Nut16

Size Size RATING A A B B C1 (NB) (Inch) mm Inch mm Inch Cooling Fins) Cooling Fins) Cooling Fins) Cooling Fins) Kgs Lbs

mm Inch mm Inch

25 I 600* 210 8.3 68 2.7 159 6.3 133 5.2 18 39.6 110

900* 273 10.7 75 3.0 159 6.3 133 5.2 24 52.9 110

1500* 273 10.7 75 3.0 161 6.3 133 5.2 34 74.9 120

2500* 216 8.5 76.5 3.0 247 9.7 — — 60 132.2 130

50 2 600** 286 11.3 133 5.2 189 7.4 131 5.2 44 97 160

900* 375 14.8 89 3.5 189 7.4 — — 50 110.2 110

1500* 368 14.5 121 4.8 263 10.4 — — 52 114.6 120

2500* 280 11 110 4.3 340 13.3 — — 110 242.5 130

80 3 600** 356 14.0 181 7.1 263 10.4 199 7.8 80 176.3 160

900** 381 15.0 181 7.1 263 10.4 199 7.8 95 209.4 110

1500** 470 18.5 187 7.4 282 11.1 213 8.4 117 257.9 120

100 4 600** 394 15.5 218 8.6 304 12.0 225 8.9 149 328.4 160

900** 457 18.0 218 8.6 304 12.0 225 8.9 180 396.8 110

150 6 600** 508 20.0 239 9.4 437 17.2 273 10.7 315 694.41 160

900* 610 24.0 220 8.7 487 19.2 322 12.7 365 804.6 110

1500** 787 31.0 284 11.2 485 19.1 322 12.7 380 837.7 120

200 8 600** 610 24.0 308 12.1 511 20.1 308 12.1 530 1168.5 160

250 10 300** 708 27.9 317 12.5 468 18.4 320 12.6 450 992 140

600* 787 31.0 304 12.0 646 25.4 398 15.7 1050 2314.8 160

(With C1 (With C2 (Without C2 (Without Weight Weight Series

Fig. 2

Note: * - 3 Flanged body. Refer Fig. 1. ** - 4 Flanged body. Refer Fig. 2.

Technical data: Series 100 / 110 / 120 / 130 / 140 / 160

Kv / Cv Values for Parabolic Trim

Valve Size Parabolic Single fold Double fold

NB Kvs silencer silencer

(LK1) Kvs (LK2) Kvs

25 11 - -

25 7 - -

25 4 3.9 -

40 11 10.9 -

50 43 41 -

50 26 25 23.8

50 18 17.8 17.2

80 100 - -

80 68 63 -

80 43 41 39

100 150 132 -

100 100 94 86

100 68 66 63

150 380 317 250

150 260 237 205

150 150 145 137

200 650 556 512

200 380 358 329

200 260 253 242

250 380 358 329

Kv value for Silencer basket Valve Lift SeatDia L1 L1 L2 L3Size (NB) (mm) (mm) 1step EP 1 step Linear 2 step Linear 3 step Linear

15 20 16 2.7 2.2 2.1 -

20 19 3.9 4.5 4.1 4.1

25 20 24 5.5 6.7 6.1 -

20 32 8.1 13.5 10.8 -

40 20 37 10.9 17.9 14 -

30 32 15 15 13.8 8.4

30 37 17.8 20 17.9 9.7

50 30 48 25 40 23.5 -

30 62 36 60 30.6 18.2

80 30 71 42 70 35.3 -

100 30 90 52 85 47.1 -

60 71 90 105 67.5 67

60 90 125 160 103 88

60 113 159 240 132 107

150 60 143 200 320 171 -

200 60 172 250 400 209 -

100 143 333 420 270 -

250 100 172 485 560 395 -

300 100 265 - - 560 -

400 100 400 - 2500 - -

Kv value for Perforated trim

Notes :

• For calculations and selection of summary Kv values, it is necessary to apply the correct x values in the calculation

• The Kv values mentioned in the chart are the maximum values for aparticular seat diameter

• Intermediate Kv values shall be applicable based on customer specifications

• To get Cv values use following formula Cv = 1.17 x Kv

Notes :

• Noise reduction same as that of perforated trims. However, it is more economical

• Use of Roboter (pneumatic pressure reducer) is possible with silencer baskets

• To get Cv values use following formulaCv = 1.17 x Kv

Valve Size (mm / inch)

15 / 0.5 25 / 1 40 / 1.5 50 / 2 80 / 3 100 / 4 150 /6 200 / 8 250 / 10 300 / 12 400 / 16

Kv Cv Kv Cv Kv Cv Kv Cv Kv Cv Kv Cv Kv Cv Kv Cv Kv Cv Kv Cv Kv Cv

0.1 0.12 0.1 0.12 11 12.87 18 21.06 43 50.31 68 79.56 150 175.5 260 304.2 380 444.6 1300 1521 2500 2925

0.16 0.19 0.16 0.19 18 21.06 26 30.42 68 79.56 100 117 260 304.2 380 444.6 650 760.5 - - - -

0.25 0.29 0.25 0.29 26 30.42 43 50.31 100 117 150 175.5 380 444.6 650 760.5 900 1053 - - - -

0.4 0.47 0.4 0.47 - - - - - - - - - - - - - - - - - -

0.63 0.74 0.63 0.74 - - - - - - - - - - - - - - - - - -

1 1.17 1 1.17 - - - - - - - - - - - - - - - - - -

1.6 1.87 1.6 1.87 - - - - - - - - - - - - - - - - - -

2.5 2.93 2.5 2.93 - - - - - - - - - - - - - - - - - -

4 4.68 4 4.68 - - - - - - - - - - - - - - - - - -

- - 7 8.19 - - - - - - - - - - - - - - - - - -

- - 11 12.87 - - - - - - - - - - - - - - - - - -

Multi Spring Actuator MSA

Pneumatic diaphragm actuator

The Forbes Marshall multi spring actuator model MSA is designed to be used with Series

100, 140 & 160 control valve bodies. The MSA series comes with a wide range of thrust

values and the actuator is field reversible to suit your control action. Its rolling diaphragm

design offers high reliability, power and actuator speed with negligible friction. MSA

actuators are compact, easy-to-install even in places with limited space and has a low

volume air chamber that shortens response time.

Features :• Field reversible - Flexible control action

• Rolling diaphragm design - High reliability

• Compact - Saves installation space

• Low volume air chamber - High positioning speedand short response time

Actuator Technical Information

Temperature range -13ºC to 90ºC

Maximum operating pressure 6 bar (g)

Linearity < 2%

Hysterisis Max. 3%

Air supply connection ¼" NPT*

*Others available on request

Diaphragm housing Mild Steel

Diaphragm Purbunan Rubber

Springs Stainless Chrome Steel

Spindle Stainless Chrome Steel

Yoke SG Iron

Materials

H0

H H

H0

DD

H+HO H D

MSA1-20 420 280 273

MSA1-30 435 300 273

Thrust force (Kgs) - Air to Open

Actuator

Model Spring to Close

From To Thrust Force (Kgs)

MSA1-20 0.2 1 59

MSA1-20 0.3 1.3 79

MSA1-20 0.4 2 119

MSA1-20 0.5 1 136

MSA1-20 0.6 1.3 182

MSA1-20 0.8 1.6 244 11.8 26 9.97 22

MSA1-20 0.9 2 272

MSA1-20 1.1 2.1 325

MSA1-20 1.3 2.1 396

MSA1-20 1.6 3.1 489

MSA1-20 1.8 2.8 528

MSA1-20 2.6 4.2 792

MSA1-30 0.2 1 57

MSA1-30 0.3 1.3 76

MSA1-30 0.4 2 113

MSA1-30 0.4 1.6 133 11.8 26 9.97 22

MSA1-30 0.6 2.1 177

MSA1-30 0.9 3.1 266

MSA1-30 1 2.1 279

MSA1-30 1.3 2.8 372

MSA1-30 1.9 4.2 558

Air to Open Spring

Range (Bar g)

WeightWith

HandwheelWithout

Handwheel

Kgs Lbs Kgs Lbs

Thrust force (Kgs) - Air to Close

Air Bar (g)

4 956

4.5 1116

5 1276

5.5 1436

Pressure Thrust force (Kgs) - Air to Close

Note: 1) Actuator weight remains same irrespective of spring range and actuator action 2) Above spring ranges are applicable for parabolic trims. For perforated and pressure balanced trims spring ranges will be selected on a case to case basis

Fig. 3

Universal Diaphragm Actuator - Series UI, UIII & UV

High actuating power at affordable cost

Forbes Marshall universal diaphragm actuator series UI, UIII & UV features a pneumatic

actuator designed for applications that demand high actuating power. Its optional

reinforced spring with compact air chamber delivers up to 14000 lbf thrust force for

extreme pressure control applications. These diaphragm actuators can be fitted with

standard accessories like positioner, feed-back transmitter, limit switches and air-filter

regulator. Optional hand wheel is provided for emergency operations.

AIR IN

H

AIR TO OPEN

AIR IN

H0

D

AIR TO CLOSE

H

D

H0

H - Without Hand wheel H + HO - With Hand wheel

Thrust force (Kgs) - Air to Open

Actuator Model Spring to Close

Thrust Force (Kgs)From ToUI-20.n 0.2 1 60UI-20.n 0.4 1.2 125UI-20.n 0.6 1.4 185UI-20.n 0.8 1.6 250UI-20.n 1 1.8 310

UI-20.v 1.2 2.25 370UI-20.v 1.4 2.45 435UI-20.v 1.6 2.65 500 19 42 16.8 37UI-20.v 1.8 2.25 560

UI-30.n 0.2 1 60UI-30.n 0.4 1.2 125UI-30.n 0.6 1.4 185UI-30.n 0.8 1.6 250UI-30.n 1 1.8 310

UI-30.v 1.2 2.8 370UI-30.v 1.4 3 435

UIII-30.n 0.2 1 140UIII-30.n 0.4 1.2 280UIII-30.n 0.6 1.4 425UIII-30.n 0.8 1.6 565UIII-30.n 1 1.8 705

UIII-30.v 1.2 2 845UIII-30.v 1.4 2.2 985UIII-30.v 1.6 2.4 1130UIII-30.v 1.8 2.6 1270 49 108 45 99UIII-30.v 2 2.8 1410UIII-30.v 2.2 3 1550

UIII-60.n 0.2 1 140UIII-60.n 0.4 1.2 280UIII-60.n 0.6 1.4 425UIII-60.n 0.8 1.6 565

UIII-60.v 1 2.6 705UIII-60.v 1.2 2.8 845UIII-60.v 1.4 3 990

UV-60.n 0.2 1 280UV-60.n 0.4 1.2 565UV-60.n 0.6 1.4 845UV-60.n 0.8 1.6 1130UV-60.n 1 1.8 1410UV-60.v 1.2 2.45 1690UV-60.v 1.4 2.65 1975UV-60.v 1.6 2.85 2255 105.6 233 99.8 220UV-60.v 1.75 3 2465UV-60.v 2.4 4.5 2800UV-60.v 2.9 4.55 3000

UV-100.n 0.2 1 280UV-100.n 0.4 1.2 1975UV-100.n 0.6 1.4 845

UV-100.v 0.8 2.8 1130UV-100.v 1 3 1410

Air to Open Spring Range (Bar g)

WeightWith

HandwheelWithout

HandwheelKgs Lbs Kgs Lbs

Actuator Technical InformationTemperature range -13ºC to 90ºCMaximum operating pressure 6 bar (g)Linearity < 2%Hysterisis Max. 3%Air supply connection ¼" NPT**Others available on request

Diaphragm housingDiaphragm Purbunan RubberSprings Stainless Chrome SteelSpindle Stainless Chrome SteelYoke S G Iron

Diecast Aluminium

Materials

Features :

• Field reversible - Flexible control action

• High thrust forces - Usable in extreme pressure reductions

• Low maintenance - Less inventory

• Cast aluminum housing - Light weight & corrosion resistance

Note: 1) Actuator weight remains same irrespective of spring range and actuator action 2) Above spring ranges are applicable for parabolic trims. For perforated, pressure balanced and three way trims spring ranges will be selected on a case basis

to case

H+HO H DUI-20 630 495 270UI-30 640 505 270UIII-30 920 723 392UIII-60 950 753 392UV-60 1290 995 530UV-100 1300 1005 530

Air Supply Standard Standard -20 UI-30 UIII-30 UIII-60 UV-60 UV-100

0.2-1.0 Bar 0.2-1.0 Bar 0.2-1.0 BarForces in KG

2.8 560 1270 25403.0 620 1410 28203.5 776 1760 35254.0 930 2115 42304.5 1085 2470 49355.0 1240 2820 56405.5 1395 3170 63456.0 1550 3525 7050

Standard Range Bar UI

Thrust force (Kgs) - Air to Close

Fig. 4

Three way valves

For control and on/off function - flow mixing and flow dividing.

Applications:

• All thermodynamic processes

• Cooling system of motor ships

• Heating and cooling systems for plate pressing, vulcanizing and other presses

• Attemperator application

C1

/ C

2B

A

Fig. 5

Description mm Inch mm Inch mm Inch mm Inch Kgs Lbs

50NB # 300 267 10.5 196 7.7 225 8.9 121 4.8 42 92.5

80NB # 300 317 12.5 230 9 247 9.7 142 5.6 65 143.3

100NB # 300 369 14.5 250 9.8 257 10.1 152 6.0 85 187.4

150NB # 300 473 18.6 370 14.6 339 13.3 213 8.4 150 330.7

200NB # 300 568 22.4 420 16.5 245 9.6 244 9.6 225 496

200 NB # 600 610 24.0 490 19.3 511 20.1 308 12.1 555 1223.5

250NB # 300 708 27.9 525 20.7 468 18.4 320 12.6 480 1058.2

Valve A A B B C1 C1 C2 C2 Weight

Dimensions of Three way valves

Note: 1) Three way valve Kv values are same as parabolic trim Kv values mentioned above 2) Three way valves are offered with single spring actuators (U series) and electric actuators only

Positioner

Description Model Number

Pneumatic 820-PP

Electro pneumatic Weatherproof 830-WP

Electropneumatic with feedback 831-WP

Electropneumatic with limit switch 832-WP

Electro pneumatic Ex. proof 830-EX

Electro pneumatic Ex. proof with feedback 831-EX

NomenclatureTechnical Information

Type Pneumatic Electro pneumatic

Input 0.2 - 1 Bar 4 -20 mA

Working resistance NA Approx -200 Ohms

Impedence NA 250 (+/-) 15 Ohms

Supply pressure 1.4 - 6 kg/cm2 1.4 - 6 kg/cm2

Air consumption 3 Litres/min at 1.4 bar 3 Litres/min at 1.4 bar

Air flow capacity 80 Litres/min at 1.4 bar 80 Litres/min at 1.4 bar

Linearity (+/-) 1% of FS (+/-) 1% of FS

Hysterisis (+/-) 1% of FS (+/-) 1% of FS

Repeatability (+/-) 0.5% of FS (+/-) 0.5% of FS

Air connection ¼” NPT (F) ¼” NPT (F)

Gauge connection 1/8” NPT (F) 1/8” NPT (F)

Ambient temperature (-) 20º C to 70º C (-) 20º C to 70º C

Protection class IP 66 IP 66

Weight 2.2 Kg 2.8 Kg

Ex proof certification NA IIB / IIC

Electric connection NA G ½ (PF ½)

Forbes Marshall offers a wide range of Pneumatic,

Electropneumatic and SMART positioners. All positioners

are optionally offered with inbuilt limit switches and / or

position transmitters. Use of force balance principal and

bellow technology in pneumatic and electropneumatic

positioners eliminates possibility of failure.

Note: 1) Various makes and models of SMART positioners are offered as per request

Valve mounted pressure controller model 902

The model 902 is a valve mounted pneumatic controller used with Forbes Marshall control valves for pressure control or over flow control application. The controller comes pre-assembled making it simple for the user to install and operate with very little modification to the existing set up.

Notes :

• Recommended distance of sensing point 1.5 mtrs

• Not recommended with perforated trims

• Maximum air supply pressure 3 bar(g)

Features:

• Save installation cost : Controller comes pre-assembled on the valve

• Saves loop cost: Eliminates the need of separate sensor, transmitter, I/P, controller and positioner

• Low maintenance

Technical data

Supply air pressure : 1.2 to 3 bar(g)Sensitivity : < 0.02% of set pointHysterisis : < 1.0% of set pointAir consumption : 0.3 Nm³/hr

NOTES

NOTES

www.forbesmarshall.com

Forbes Marshall Pvt. Ltd.A-34/35, MIDC, Industrial Estate, ‘H’ Block, Pimpri, Pune - 411 018. India.Tel.: 91(0)20 - 27442020Fax: 91(0)20 - 27442040 E-mail: vmktg@forbesmarshall.com

Domestic:Ahmedabad, Alibag, Bangalore, Bhopal / Indore, Chandigarh, Chennai, Coimbatore, Delhi, Hyderabad, Jamshedpur, Kolkata, Mumbai, Nagpur, Navi Mumbai, Surat, Trichy, Vadodara, VisakhapatanamInternational Operations: exp@forbesmarshall.comBangladesh, Canada, Egypt, Indonesia, Iran, Kenya, Malaysia, Nepal, Sri Lanka, Thailand, U.A.E. (Instrumentation) (Boilers & Boiler Accessories)USA,