keystone rmi dubex butterfly valve awwa face … … · keystone rmi dubex butterfly valve awwa...

KEYSTONE RMI DUBEX BUTTERFLY VALVE AWWA FACE-TO-FACE

FEATURES

• Triple eccentric design: - 1st offset: center line of the resilient disc

seal is offset from the center line of the shafts.

- 2nd offset: the center line of the shaft is offset from the valve body.

- 3rd offset: the Dubex body seat landing surface has the shape of an oblique cone with the ground surface perpendicular to one side of the cone.

• Resilient seal firmly integrated on disc for tight shut off performance.

• In-line replaceable and readjustable resilient disc seal.

• Standard body seating surface is Stainless Steel. Alternative seating surfaces on request.

• Horizontal or vertical shaft mounting.• Axial bottom shaft bearing carrying the disc

weight when installed with shaft in vertical position.

• Reversed V-shaped packing for vacuum applications.

• Open brackets for packing access and adjustments are available on request.

• Self lubricating bearings.• Low head loss, suitable for throttling services.• Clockwise closing.• Suitable for manual gear, electric, hydraulic

and pneumatic actuation.• Design to comply with AWWA: - Higher grade shaft material comply to

shaft safety requirements of AWWA. - Minimum shaft diameter deviates from

AWWA.

The Dubex is a double flanged, triple eccentric resilient seated valve design for services in the water industry

CERTIFICATION

• Standard NSF 61.• AWWA POD (Proof Of Design) certificates

available.

GENERAL APPLICATION

• Drinking water pump station and transportation/distribution.

• Waste water effluent and treatment plants.• Reservoirs, circulating water systems.• Desalination plants.• Cooling water systems (power plants, general

industry).

VCTDS-00018-US 14/02

TECHNICAL DATA

Pressure: 6" to 66" 350 psi up to 84" 250 psi up to 120" 150 psi above 120" contact factoryTemperature: 0 - 220°FFlange accommodation: as per AWWA C504 flat face (raised face optional)Drilling: 6" to 72" ASME B16.1 above 72" AWWA C207,

class D Other drillings on requestFace-to-face: According AWWA C504-10

short. Above 72": according

AWWA C516-10 Alternative face-to-face

dimensions on request

TESTING

• Performance testing in compliance with AWWA C504 requirements.

• Valves are cycle tested as per AWWA C504 requirements.

www.valves.emerson.com © 2017 Emerson. All rights reserved.

2


Valve shown with epoxy resin internal lining (Epasfill)

No rubbing between disc seal and body seat

SPECIFIC ADVANTAGES OF THE TRIPLE ECCENTRIC DESIGN

- Torque closing: greater torque results in improved tightness.- Closing torque is in direct relation with the shut off pressure, which results in smaller actuator

selections at lower pressures.- Virtually no rubbing from the resilient seal on the seating surface. This enhances the life

expectancy of the valve.- Large diameter valves are normally in open position. Sediments can therefore settle on the body

seating surface. Due to the specific geometry these sediments will be whiped off during closing, improving sealing performance.

- The resilient disc seal is adjustable, facilitating easy maintenance.- The resilient disc seal is replaceable in line.

3rd eccentricity

2nd eccentricity

point of rotation

1st eccentricity

Disc seal

Clearance between disc seal and body seat

120" valve shown

3

Notes• Coating: Dry layer thickness of 6 Mill, NSF 61 approved• Rubber lining: Natural rubber (Ebonite), with standard thickness of 1/8", and a Shore D hardness of 75. Other linings available on request• Other configurations available on request.

Full lined configurationBody external surface : two pack epoxy paintBody internal surface : rubber linedBody seat : ductile iron, rubber linedDisc seal retaining ring : ductile iron, rubber linedDisc : ductile iron, rubber lined

Optional configurationBody external surface : two pack epoxy paintBody internal surface : two pack epoxy paintBody seat : ductile iron, epoxy resin linedDisc seal retaining ring : ductile iron, two pack epoxy paintDisc : ductile iron, two pack epoxy paint

Optional configuration, metal to metalBody external surface : two pack epoxy paintBody internal surface : two pack epoxy paintBody seat : stainless steelDisc seat retaining ring : NiAlBrDisc : ductile iron, two pack epoxy paint

Standard configuration, stainless steel seat and retaining ringBody external surface : two pack epoxy paintBody internal surface : two pack epoxy paintBody seat ring : stainless steelDisc seal retaining ring : stainless steelDisc : ductile iron, two pack epoxy paint

Lined configuration, stainless steel retaining ringBody external surface : two pack epoxy paintBody internal surface : rubber linedBody seat : ductile iron, rubber linedDisc seal retaining ring : stainless steelDisc : ductile iron, rubber lined

Retaining seal

BodyBody seat ring

Disc seal

Disc


SPECIFIC ADVANTAGES OF THE TRIPLE ECCENTRIC DESIGN

4

LL*6 150 5 127 110 50 6 150 6 162 11 ¾ 298 4 ⅜ 1108 200 6 152 155 70 7 ⅞ 200 8 196 14 ½ 368 4 ⅜ 11010 250 8 203 199 90 9 ⅞ 250 9 228 17 432 4 ⅜ 11012 300 8 203 243 110 11 ⅘ 300 10 264 20 510 4 ⅜ 11014 350 8 203 375 170 13 ¾ 350 12 304 22 ¾ 580 4 ⅜ 11016 400 8 203 419 190 15 ¾ 400 13 330 24 ⅞ 632 4 ⅜ 11018 450 8 203 530 241 17 ¾ 450 14 360 27 ¼ 692 4 ⅜ 11020 500 8 203 629 286 19 ⅝ 500 15 390 29 ⅞ 758 4 ⅜ 11024 600 8 203 993 451 23 ⅝ 600 18 460 35 ⅜ 898 4 ⅜ 11030 750 12 305 1.589 722 29 ½ 750 23 584 44 ½ 1,131 4 ⅜ 11036 900 12 305 2.318 1.054 35 ⅖ 900 27 688 49 ⅞ 1,266 4 ⅜ 11042 1050 12 305 3.344 1.520 41 ⅜ 1.050 29 738 57 1,488 7 ⅞ 20048 1200 15 381 4.040 1.836 47 ¼ 1.200 35 878 67 1,725 8 ⅞ 22554 1350 15 381 5.525 2.511 53 ⅛ 1.350 37 938 72 ¼ 1,835 8 ⅞ 22560 1500 15 381 8.113 3.688 59 1.500 43 1.102 85 ⅕ 2,164 8 ⅞ 22566 1650 18 457 10.070 4.577 65 1.650 44 1.122 88 ⅞ 2,259 8 ⅞ 22572 1800 18 457 11.589 5.268 70 ⅞ 1.800 51 1.292 100 ½ 2,554 8 ⅞ 225LL**78 2000 24 610 13786 6266 78 ¾ 200084 2100 24 610 15630 7090 82 ⅝ 210090 2300 24 610 19724 8947 90 ½ 230096 2400 28 711 21987 9994 94 ½ 2400102 2600 30 762 29360 13345 102 ⅜ 2600108 2700 30 762 32450 14750 106 ¼ 2700114 2900 30 762 37317 16927 114 ⅛ 2900120 3000 32 813 39956 18162 118 ⅛ 3000

LL* = Laying length AWWA C504 shortLL** = Laying length AWWA C516

Flow through shape disc from 88”

Lens shape up to 86”

Standard shaft seal Optional: adjustable stuffing box


VALVE DIMENSIONSValve Laying length D Weight øA C H H1

(NPS) (DN) (NPS) (DN) (lbs) (kilos) (NPS) (DN) (NPS) (DN) (NPS) (DN) (NPS) (DN)

5

6 0 42 85 159 252 393 611 992 1290 14718 0 75 151 282 448 699 1086 1763 2293 261510 0 118 236 441 701 1092 1697 2755 3730 456812 0 170 340 634 1009 1572 2443 3967 5371 657814 0 231 462 864 1373 2140 3325 5399 7311 895416 0 302 604 1128 1794 2796 4343 7052 9549 1169518 0 382 764 1428 2270 3538 5497 8925 12085 1480120 0 472 944 1762 2803 4368 6786 11019 14920 1827324 0 679 1359 2538 4036 6290 9772 15867 22440 2941930 0 1062 2123 3965 6307 9828 15269 24793 35062 4596736 0 1529 3057 5710 9081 14152 21988 35701 50489 6619242 0 2081 4161 7772 12361 19263 29928 48593 68721 9009448 0 2718 5435 10151 16145 25160 39089 63469 89759 12579954 0 3439 6879 12848 20433 31843 49472 80328 113601 15921560 0 4246 8492 15861 25226 39312 61077 99170 140248 19656166 0 5138 10276 19192 30524 47568 73903 119996 169700 23783972 0 6115 12229 22840 36326 56610 87951 142805 201957 28304878 0 7549 15098 28198 44847 69888 108581 176302 261499 39422484 0 8323 16645 31088 49443 77052 119711 194373 288302 43463290 0 9983 19967 37292 59310 92427 143599 233160 345832 52136196 0 10870 21741 40605 64579 100639 156357 253875 376558 567683102 0 12758 25515 47655 75791 118112 183503 297951 441933 666239108 0 13758 27515 51391 81733 127372 197890 321311 476581 718473114 0 15871 31743 59287 94290 146941 228292 370676 549801 971920120 0 16985 33970 63446 100905 157249 244308 396680 588372 1040105

Example of casting weight calculationSimulation of disc deflection under pressure

NOTES1. Listed data are valid for 150 psi rated valve only.2. Rated Cv = volume of water in USG/min at 60°F that will pass through valve at a given valve opening at a pressure drop of 1 psi.3. Values may change without notice.4. Cv-values are based on best data available however no responsibility is assumed for inaccuracies.5. Allowable flow velocity ≤ 72’: 10 Ft/s; ≥ 80”: 8 Ft/s. For higher velocity, please contact factory.

In our factory R&D facilities all our large diameter Dubex valves are modeled and optimized for specific flow conditions with infinite ANSYS technologies. Latest computer software is also applied to design the castings and to produce the valves with greatest care and efficiency.

Cv VALUESOpening angle (deg)

NPS 0 10 20 30 40 50 60 70 80 90


6

NOTES1. Trims 450, 451, 452, 453: body internal and external and disc: coated with two-part Epoxy coating. Min. dft. 6 Mill (150 mu). Color Red Brown.2. Trims 460, 461, 457, 464: body external: coated with two-part Epoxy coating. Min. dft. 6 Mill (150mu). Color Red Brown. Body internal, body seat area and disc: natural

rubber lined (Ebonite). Hardness 75 Shore, layer thickness 1/8”.3. Ductile Iron RL body is always ”dry body” design.4. Trims 460 + 461 always have a dry shaft (rubberized shaft).5. In all trims: Disc pin material is same as shaft material.6. Contact factory for other materials, configurations and options.

MATERIAL SELECTIONBody Disc Body seat Shaft Disc Seal Retaining ring Trim No.Ductile iron Ductile iron Stainless Steel 316 Stainless Steel 431 EPDM Stainless Steel 316 450Ductile iron Ductile iron Ductile Iron (Epasfill) Stainless Steel 431 EPDM Stainless Steel 316 451Ductile iron Ductile iron Stainless Steel 316 Stainless Steel 431 EPDM Ductile iron 452Ductile iron Ductile iron Ductile Iron (Epasfill) Stainless Steel 431 EPDM Ductile iron 453Ductile iron RL Ductile iron RL Ductile iron RL Stainless Steel 431 EPDM Stainless Steel 316 460Ductile iron RL Ductile iron RL Ductile iron RL Stainless Steel 431 EPDM Ductile iron RL 461Ductile iron RL Ductile iron RL Ductile iron RL Duplex SS 1.4462 EPDM Stainless Steel 316 457Ductile iron RL Ductile iron RL Ductile iron RL Duplex SS 1.4462 EPDM Ductile iron RL 464

MATERIAL SPECIFICATIONPartname Material Material number RemarkBody Ductile Iron A 536 Gr.65-45-12Disc Ductile Iron A 536 Gr.65-45-12Retaining ring Stainless steel Grade 316

Ductile iron A 536 Gr.65-45-12 Other available materials for body, disc and retaining ring likeA 395 Gr.60-40-18, ASTM A 216 WCB, ASTM A 352 LCB,BS 2789 gr.420-12, ASTM A 352 LCB, ASTM A 351-CF8M etc.

Seal EPDM Temperature range 0°F to +220°F (-18 to + 104°C)NBR Temperature range 15°F to +180°F (-10 to + 80°C)

Shaft Stainless steel ASTM A 276-431 Alternatives: Grade 316 and DuplexBearings Self lubricating PTFE-lined Bronze bearings alternativelyBody-seat Stainless steel Grade 316 Alternative: Epasfill lined ductile iron, rubber linedDisc pin Stainless steel ASTM A 582-430F Alternative: DuplexSeal cover Stainless steel Grade 316Bottom cover Ductile Iron A 536 Gr.65-45-12Axial positioning ring Stainless steel Grade 316O-rings and seal NBR-rubberInternal screws Stainless steel Grade 316Axial bearings Glass cloth reinforced PTFEAdjustable stuffing boxBracket Ductile iron A 536 Gr. 64-45-12Gland Ductile iron A 536 Gr. 64-45-12Packing Braided TFE Hamar TP


7

120”DN 3000

84”DN 2100

66”DN 1650

6”DN 150

350 psi (25 bar)

250 psi (16 bar)

150 psi (10 bar)

Pressure rating

Max

imum

pre

ssur

e

Valve size

Bi-directional, tight shut off performance

PARTS LISTPart name Part name Part name1 Body 9 Axial positioning ring 17 Screws bottom shaft2 Disc 10 Body seat 1) 18 Screws bottom cover3 Retaining-ring 11 Disc pin 19 Screws seal 2)

4 Seal 12 Seal cover 20 Axial bearing5 Top shaft 13 Shaft seal6 Bottom shaft 14 O-ring7 Bearings 15 Screws body seat8 Bottom cover 16 Screws retaining ring

NOTES1) 6” to 14” are equipped with a body-seat sleeve

instead of body-seat ring.2) 6” to 8” have a circlip instead of screws.3) Pictured is valve size 18”.4) For AWWA configured valve an adjustable stuffing

box is available.


8

- Bi-directional tight shut off service - Available with add on power packs, control panels and cabinets- In line adjustable seat- In line maintenance- Non rubbing soft seat, enhancing the life time expectation- Fully lined versions available for corrosive services- Custom made

3. Fabricated designFor specific applications, such as vacuum service and buried service steel pipe lines, we do produce the fabricated Dubex valve design.It incorporates all advantages of the triple eccentric resilient seated butterfly valves with the features of a butt weld valve having identical wall thicknesses between pipe and valve.Having equivalent materials ensures proper welding and avoids cracking due to different material expansions coefficients.

This unique and proven configuration combines the advantages of the tight shut off butterfly valve with the non slamming action of high end butterfly valves. Such design is a cost effective alternative to existing pump protection solutions such as traditional swing type check valves, and large and complex cone type valve.Specific advantages of the combined butterfly check valve design:- Power failure to close - Very short closing times- Simple, reliable quarter turn operation eliminating the use of

multi turn gears on sensitive electrical equipment- Controlled closing times in order to avoid water hammer - Quick opening times - Non slamming design

24” Butt weld Dubex valves in production

Computer simulation of CBCVExample of 72” combined butterfly check valve for a power station cooling water system

AVAILABLE TECHNICAL OPTIONS

1. Dry shaft optionAlternative to high corrosion resistance shaft materials the Dubex valve can be equipped with the optional dry shaft provision. In that case the standard shaft material is protected from the medium by applying rubber lining. This lining protects the standard shaft material against corrosive environments.

2. Combined Butterfly Check Valve (CBCV)


© 2017 Emerson. All rights reserved.

keystone rmi dubex butterfly valve awwa face … … · keystone rmi dubex butterfly valve awwa...

Documents