RK & RT Series

Double eccentric valvesAPI 609 Standard - Category B

Engineering GREAT Solutions

Double eccentric valves - API 609 Category B

2

Highlights

Features

The high performance RK & RT series butterfl y valves are designed to

provide bidirectional seal as standard for #150 and #300 classes with

preferential fl ow direction.

> Double eccentric disc

> Monoblock body

> Variety of materials

> Fire-safe model available

> Body

Wafer, Lug and Flanged confi gurations are

designed and casted in monoblock body to

ensure maximum safety and reliability.

Extended neck that eases access to the

stem packing system by a housing for the

packing gland. The top fl ange allows direct

coupling of actuators without the need of

supports and eliminating the possibility of

gaps between them.

Semi-lug casted in the outer diameter of the

Wafer type end, facilitates the installation and

alignment between fl anges.

RK & RT Series feature a travel stop fused to

the body, so that, after precise machining,

it guarantees perfect closure of the disc and

alignment with the seat.

> Disc

The disc provides low head loss in the fully

open position and low drive torque as a

function of its eccentricity.

The fi rst eccentric axis is characterized by

the transverse displacement of the center

of rotation of the disc with the center of the

body. Its confi guration allows fl uid passage

through a small opening angle of the disc.

The disc edge is polished around its

perimeter, ensuring a better seating and total

sealing with the seat.

> Upper and lower stem

The upper and lower stems are fi xed to

the disc by torque plugs to ensure the

performance and safety of the product.

The dimensions of the upper end of the stem

allow installation in actuators according to

DIN 3337.

> Seat

RK & RT designs allow a perfect seat-to-

disc contact in order to minimize the eff ects

of the friction and, together with the double

eccentricity of the disc, contribute to the

reduction of the drive torque and premature

wear.

For both metallic and soft seats, a metal ring

is used to fi x them to the body. Thus, it is

necessary to use gaskets between the body

and the pipe fl ange.

Variety of materials and versatile design

allow the RK series to operate in several

applications and needs.

> Bushing

Provides the perfect alignment between the

disc and the seat, reducing wear on critical

components and improving valve effi ciency

in operation.

> Gasket

Standardized element which facilitates its

interchangeability, improving the effi ciency of

the seal assembly.

Butterfl y Valves RK & RT Series Long body

3

> Packing gland

Assembled in the upside-down position, it allows easy adjustment

and uniform compression of the packing. It does not interfere with

actuator assembly directly on the valve top fl ange and provides the

blowout-proof feature to the upper stem.

> Disc adjustment

Equipped with a fi ne adjustment of the disc by a screw and a locating

nut, it allows an accurate alignment of the disc providing perfect

seating and consequently better sealing effi ciency.

Construction Standard

API 609 Category B

End

Wafer / Lug / Flanged

Long and short body

Face to face

API 609 Category B

ISO 5752 Table 1 Col. 20

Dimensions

RK: 2” to 24”

RT: 26” to 54” (others upon request)

Pressure limits

150# / 300# (others upon request)

Seat

PTFE / RTFE / Inter-hard / Inter-steam /

Stansit / AiSi 316 / Incoloy

Materials

Carbon steel ASTM A-216 WCB

Stainless steel A-351 CF8M / CF8

PTFE / RTFE / Inter-hard / Inter-steam

Stainless steel ASTM A-564 Tp. 630 (17-

4PH)

Chrome plated Stainless steel ASTM A-351

CF8M

Chrome plated Stainless steel ASTM A-276

S316

Graphite / PTFE

Materials

Seats

RK Series

Body Disc Seat Stem

Carbon steel ASTM A-216 Gr. WCB Stainless steel ASTM A-351 Gr. CF8 PTFE ASTM A-564 Tp.630

Stainless steel ASTM A-351 Gr.CF8M Stainless steel ASTM A-351 Gr.CF8M RTFE ASTM A-276 Tp.410

- - Inter-steam -

- - Inter-hard -

- - Stansit -

- - AiSi 316 -

- - Incoloy -

RT Series

Body Disc Seat Stem

Stainless steel ASTM A-351 Gr.CF8M Stainless steel ASTM A-351 Gr. CF8 PTFE Stainless steel ASTM A-246 Tp. 410

Stainless steel ASTM A-351 Gr.CF8 Stainless steel ASTM A-351 Gr.CF8M RTFEStainless steel ASTM A-564 Tp. 630

(17-4PH)

Carbon steel ASTM A-216 Gr. WCBDuctile iron 65-45-12

(coated with Hard chrome on edges)Inter-steam -

Ductile iron 65-45-12 Stansit -

Material Description

Polytetrafl uoroethylene (PTFE) / Tefl on Used in a wide range of applications

Inter-steam (PTFE + Filler) Developed by IMI Interativa for critical temperature and pressure applications

Stansit (PTFE + Filler) Developed by IMI Interativa for critical temperature and pressure applications

Inter-hard High molecular weight polyethylene for abrasive applications

Double eccentric valves - API 609 Category B

4

Bill of materials: RT Series

Bill of materials: RK Series

ITEM DESCRIPTION

01 Body: Wafer / Lug / Flanged

02 Gland retainer screws

03 Disc

04 Upper stem

05 Lower stem

06 Gland retainer

07 Torque plugs

08 Retaining bearing

09 Upper spacer

10 Packing

11 Bearing

12 Stop bolt

13 Stop nut

14 Lower spacer

15 Thrust bearing

16 Seat ring

17 Seat

18 Steel cable

19 Seat retainer screws

20 Seat retainer ring

21 Body O’ring

22 Locating nut

23 Bottom cover kit

24 Bottom cover screws

25 Bottom cover washer

13

14

16

04

02

15

22

2303 12

1718 19

2021

01

02

05

06

08

09

10

11

ITEM DESCRIPTION

01 Body: Wafer / Lug / Flanged

02 Bushing

03 Disc

04 Upper stem

05 Lower stem

06 Locating nut

08 Locating nut screws

09 Bottom cover gasket

10 Bottom cover

11 Bottom cover screws

12 Torque plugs

13 Gland retainer

14 Gland ring

15 Gland stud

16 Packing

17 Seat

18 Seat ring

19 Body gasket

20 Seat retainer ring

21 Seat retainer screws

22 Packing gland washer

23 Packing gland nut

02

06

04

07

08

08

10

1101

03 17 16 18 21 20 19

12

11

10

08

05

14

15

23

24

25

22

07

13

09

5

Dimensional table: RK SeriesValues in millimeters (mm)

RK

Dim

en

sio

n -

Cla

ss #

150

Dimension 2” 2½” 3” 4” 5” 6” 8” 10” 12” 14” 16” 18” 20” 24”

A

Wafer / Lug 44 48 48 54 57 57 64 71 81 92 102 114 127 154

Short fl ange 114 114 114 127 140 140 152 165 178 190 216 222 229 267

Long fl ange 203 203 203 229 267 267 192 330 356 381 406 432 457 508

B 155 155 165 190 195 220 270 300 330 356 393 440 480 540

C 259 266 279 326 376 401 480 540 605 662 736 810 880 1018

ØD 55 60 76 100 116 142 193 240 292 321 366 420 460 563

E 16 16 16 21 21 21 23 28 28 28 38 38 38 54

G F07 F07 F07 F07/10 F07/10 F10/12 F10/12 F12/14 F12/14 F14/16 F14/16 F16 F16 F16/25

H Q11 Q11 Q11 Q17 Q17 Q17 Q22 Q27 Q27 Q27 Q36 Q36 Q36 Q46

ØI 9 9 9 9&11 9&11 11&13 11&13 13&17 13&17 17&21 17&21 21 21 21&17

ANSI B16.5 Assembly between fl anges - #150

Re

fere

nc

e

va

lue

s

ØL 120,7 139,7 152,4 190,5 215,9 241,3 298,5 362 431,8 478,3 539,8 577,9 635 749,3

ØM 3/4" 3/4" 3/4" 3/4" 7/8" 7/8" 7/8" 1" 1" 1.1/8" 1.1/8" 1.1/4" 1.1/4" 1.3/8"

N Holes No. 4 4 4 8 8 8 8 12 12 12 16 16 20 20

CL - CorpoCL - Haste

B

C

L - Círculo de FuraçãoØ

ØM - Furo

I - Furo

G - Círculo de Furação

H

Ø

Ø

ØD

E

A

Bolt circle

Bolt circle

Hole

Hole

StemBody

Double eccentric valves - API 609 Category B

6

RK

End 2” 2½” 3” 4” 5” 6” 8” 10” 12” 14” 16” 18” 20” 24”

Wafer 4 5 6 11 14 17 24 42 67 77 108 150 200 280

RT

End 26” 28” 30” 32” 36” 40” 42” 48” 54”

Wafer 250 276 345 355 573 732 828 1176 1395

B

C

ØD

ØG

J - nº de FurosN - Ø do FuroO - Ø do Círculo de Furação

DN-36" ~ 54"

H

J - nº de FurosN - Ø do FuroO - Ø do Círculo de Furação

F

Dimensional table: RT Series

Weights

Values in millimeters (mm), except G line (in inches)

Approx. values in Kilograms (Kg.)

RT

Dim

en

sio

ns

DN 26” 28” 30” 32” 36” 40” 42” 48” 54”

A 167 167 167 190 200 218 251 281 294

B 554 578 603 629 679 736 771 888 1012

C 1066 1143 1181 1232 1341 1452 1516 1736 2004

D 765 829 880 937 1045 1159 1216 1380 1514

F 55 55 55 55 140 140 140 152 152

G 3.5/8” 4” 4.1/4” 4.1/4” 4.1/4”

H 45 45 45 55

J 4 4 4 4 8 8 8 8 8

N 22 22 22 18 18 18 22 22 22

O 165 165 165 254 254 254 298 298 298

ISO F16 F16 F16 F25 F25 F25 F30 F30 F30

Number of holes

Number of holes

DN-26” ~ 32”

Hole

Hole

Bolt circle

Bolt circle

7

TRIMSOFT seat

Body Disc Seat Stem Packing

614 Carbon steel WCB Stainless steel CF8M PTFE Stainless steel 17-4PH PTFE

616 Carbon steel WCB Stainless steel CF8M Inter-Hard Stainless steel 17-4PH PTFE

617 Carbon steel WCB Stainless steel CF8M Stansit Stainless steel 17-4PH PTFE

618 Carbon steel WCB Stainless steel CF8M Inter-Steam Stainless steel 17-4PH PTFE

634 Stainless steel CF8M Stainless steel CF8M PTFE Stainless steel 17-4PH PTFE

636 Stainless steel CF8M Stainless steel CF8M Inter-Hard Stainless steel 17-4PH PTFE

637 Stainless steel CF8M Stainless steel CF8M Stansit Stainless steel 17-4PH PTFE

638 Stainless steel CF8M Stainless steel CF8M Inter-Steam Stainless steel 17-4PH PTFE

705 Bronze/ AL B148 Bronze/ AL B148 RPTFE Monel K500 PTFE

TRIMMetal seat

Body Disc Seat Stem Packing

814 Carbon steel WCBChrome Stainless steel

CF8MChrome Stainless steel 316 Stainless steel 17-4PH Graphite / PTFE

834Stainless steel

CF8M

Chrome Stainless steel

CF8MChrome Stainless steel 316 Stainless steel 17-4PH Graphite / PTFE

816 Carbon steel WCBChrome Stainless steel

CF8MIncoloy Stainless steel 17-4PH Graphite / PTFE

836Stainless steel

CF8M

Chrome Stainless steel

CF8MIncoloy Stainless steel 17-4PH Graphite / PTFE

500 Bronze/ AL B148 Bronze/ AL B148 Bronze Monel K500 Graphite / PTFE

Opening

Angle

RK Series

2” 2½” 3” 4” 5” 6” 8” 10” 12” 14” 16” 18” 20” 24”

10º 6 6 8 16 30 50 83 144 208 257 308 373 463 650

20º 10 10 12 23 44 70 117 202 304 360 432 548 680 991

30º 19 19 24 44 83 130 251 454 678 747 803 1121 1390 2076

40º 34 34 43 80 149 230 437 754 1051 1186 1422 1863 2315 3803

50º 51 53 67 130 242 370 695 1185 1625 1909 2289 2990 4010 6060

60º 78 80 100 194 366 550 1052 1821 2766 3121 3614 4735 6175 9091

70º 105 111 139 269 504 760 1496 2611 3838 4416 5251 6728 8795 13301

80º 134 148 186 360 673 1010 2001 3540 5325 6225 7530 9845 12655 18466

90º

(#150)163 175 220 425 795 1195 2440 4540 6915 8300 10040 12460 15430 21660

90º

(#300)160 170 215 413 785 1140 2300 4333 6600 7920 9580 11890 14820 20665

RK Series usual TRIMs

Flow coeffi cient x Opening angle - RK Series

Inter-Lok valve features a wide range of materials and performance guarantee for a wide range of applications.

List of usual TRIMS and valve specifi cations / conditions:

Approx. values considering specifi c weight of water 1.0 at 20ºC

Double eccentric valves - API 609 Category B

8

Seat leakage, tolerance and specifi cations (ANSI/FCI 70.2)

Sealing class Max. Leakage Test fl uid Pressure and Temperature

Class IV 0,01% of rated valve capacity Air or waterService pressure or 50 psid.

(3-4 bar diff erential)

Class V5 x 10-4 ml/min/psig/inch. of diameter

(5 x 10-12 m³/sec/bar diff erential/mm. of diameter)Water

Service pressure at 50º to 125º F

(10º to 52º C)

Nominal diameter Bubbles per minute ml. per minute

Classe VI

2" 3 0,45

Air or

Nitrogen

Service pressure or 50 psig

(3-4 bar diff erential)

2,5" 4 0,60

3" 6 0,90

4" 11 1,70

6" 27 4,00

8" 45 6,75

Pressure Class (ANSI B 16.34)*Velocy limits for ON-OFF Services

Range (inch) Pressure Pressure (bar) at 38º C

2" - 24" 150# 19,6

2" - 24" 300# 51,1

Fluids 9m/s

Gases 54m/s

Opening

Angle

RT Series

26” 28” 30” 32” 36” 40” 42” 48” 54”

25º 1902 2156 2819 2938 4356 4948 5112 6825 8327

30º 2661 3014 3986 4154 5936 6925 7326 9612 11727

40º 4729 5358 7080 7378 9790 11862 12793 16785 20478

50º 7760 8790 11328 11805 15572 19307 20830 27331 33344

60º 12305 13939 18090 18851 25053 30636 32803 43039 52508

70º 20325 23023 28844 30058 40086 50406 54680 70485 85992

75º 30302 34325 35924 37436 49877 62198 69627 89635 109355

80º 34205 38674 43003 44813 59667 73990 84574 108786 132719

90º 36955 41860 52443 54650 77089 91400 102861 132794 162000

Approx. values considering specifi c weight of water 1.0 at 20ºC

Flow coeffi cient x Opening angle - RT Series

*For A-216 WCB body only

9

Valve Specifi cation - Part Number Confi guration

Constructions

Example 20-111-61400 Interlok Valve 150# 20"

Body Carbon steel WCB

Disc Stainless steel CF8M

Seat PTFE

Stem 17-4PH

Gaskets PTFE

PressureClass

EndConstruction

ChosenTRIM

SpecialVariation

Drillingcircumference

1 = 150#2 = 300#

(Standard 00)

1 = Wafer2 = Lug3 = Flanged

1 = Wafer2 = Lug3 = Flanged

Diameter

2 0 - 1 1 1 - 6 1 4 0 0

WaferLug Flanged

IMI Critical Engineering

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www.imi-critical.com

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Contact

Versão 0317