inc. park, tel: … · 2018-07-05 · a ffi h fl' the principle behind the edward tiltins disk...

Authonized Pants, Inc.289-F Subunban AvenueDeen Park, NY ]-1729Tel: (63L) 242-2498b_

Rockwell-Built Edword

TrrrlilG DtsKCHECK VALVES

of ROCKWELL MANUFACTURING COMPANY, East Chicaso, Indiana

CATA

ONE.PIECE

EDWARD VALVES, !Ne., Subsidiary

coPYRIGHT, EOWARD VALVE5, tNC.

@tCIG r 4-Y

WWW.AUTHORIZEDPARTS.COM

WWW.AUTHORIZEDPARTS.COMWWW.AUTHORIZEDPARTS.COM

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fl' The PrincipleBehind the EdwardTiltins Disk

Although the pivot and seating principle follolr,edin this nen valr,e is not common in the valve field, itis a sirnple principle and can be clescribed in simplegeometry terms.

In the ciiagram on the right the bocl,v seatine surfaceis part of a cone l'ith an al)ex at A. Ihe seatins surfacehas a r'lidth \V. If a perpenclicular to the cone is clrartnat B on the srnaller seat cliameter ancl at C on thelarger seat cliameter these lill intelsect at D (abol'ethe center line). The seating action ivill be satisfactoryif the pivot is locatecl inside the angle C D E. lf the

pivot is on the left oI lirre C D the disk will lift awav

from the seat at C as the r,ah'e oPens. Likel'ise the diskcannot sling through at C as the vah,e closes since

an interlerence exists be,voncl the seated position. T'he

same conclitions prer,ail at B if the pivot is on the

right of the perpendicuiar B E.

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The Principleat Work

This series cf drarvings situr-rlates 1he ollet'ltion o{the Edrvard one-piece tilting disk check vltlr'e lttrcleractual sen'ice ccnditions.

Figures I through 6 shol rvhat happens rr'hen theflou'in the line stolls. Particr-rlar attention is cal1ec1 trr

Figr-rres 3 and 4 shou,ing horv part of the clisk srr-itlg:fron-r the cior:llstream sicle to the seating area aucl thtopposite part s\\Iings Irorn the upstream sicie to thesearlng :u'ea.

Figures 6 through 1, u,hen vier'r,ecl in sequence, shollhat happens lthen florv starts ancl the tlisk tilts frourthe closeci to the.open position. Notice that the cliskcomes to rest :rgainst a stop n'hen operating flnlv ratels t'eacne(l.

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2 The Edward One-Piece Tilting Disk Check Valve design is protected by U. S. Patent Nc. 2864401



BAsrc DArA- Edward Casf Sfeel One-PieceTihing Disk Check Valves

( HORIZONTAL or VERTICAL)

DESCRIPTION900 !b (216A tb woc)Fig. 97O-Y-Sizes 6", 8", 1A", 12",74",

16",18" and2Q"Welding Ends, Pressure-Seal Cover

1500 rb (3600 tb woc)FiS. 157O-Y-Sizes 6", 8", 7O", 12'0,

14", 16", 18" and 20"Welding Ends, Pressure-Seal Cover

2500 rb (6000 tb woc)Fig. 2510-Y-Sizes 6", 8", 1A", 12",

14", 16", 18" and 20"Welding Ends, Pressure-Seal Cover

DIMENSIONS uNeHEsr WEIGHT rpouHrsr

RATINGS900 lb Primary Service . 3250 lb Hydrostatic Shell Test Pressure

Moximum Non-Shock Service Pressure Rqtings psi

Vot t, Co,bon Sreet, WCB l2tf0l2Mor'l, Grode WC6 I Sqme Rorinss os WCB t450l1275ll22OJilsolt05Ol 9001

Mor',l, Grode wc9 | some Rorinss os wcB lt450 lt275lt220l|5011050 | 900

1500 lb Primary Service 5400 Ib Hydrostatic Shell Test PressureMqximum Non-Shock Service Pressure Rqtinqs psi

r00l 200 300i 400 500 6001 7001 800 8501 9001r0001t023 1032)ervce remp. ueg. r i ruul zuu Juul 4ou 5u0 6uul /uul 6uu d)ul yuultuuultuzS to32Mot'1, Corbon Steel, WCBMor l, Grode wc6 I some Rorinss os wcB 12415 212512025 t9t0l 17901 15001

Mor'l, Grode WC9 i Some Rorinss os WCB 12415 2125 2025 t9toltTgOl 1t500

2500 lb Primary Service...9000 lb Hydrostatic Shell Test Pressure

- a

Vor't. Co,Uon Sreet, WCe IAOOOI5A:OF6qOl5S5b@ |Mot'1, Grode WC6 I 5ome Rotinqs os WCB a025 3550 33'5 3180 2800 2500

Ny'ot'1, Grode WC9 Some Potinos os WCB 4025 3550

E-Center to

Figure Number 970YSizes (lnches) 5 8 l0 I 12 I 14 16 18 I 20

A-End to End 22 28 34 39 42 141 53 l5BE-c"nt"r io Top-w-width | 3r+ l6 20 231/q'23Vq 28 28 341k

22 28 134 39 42 141 53 24 30 369 12 121/z 11

131/q1163/+ 2O1l+ 23Vz 23112 2BVz 281/2135 l5 lB 20 24

8 l0lt2\14

Weicht lbs 325 4401 BOO I 460 155A 321 0 3230 5200 I 210 2O2o 26tO 4390 5125l569oiSOO1990



I$

II

ONLY EDWARDGIVES YOU ALLTHESE FEATURES-

One-piece body - no bolted joints

Pressure-seal cover and hingepin seals

Quick, quiet closing

Tight seating - Stellite seat

integral with body

Maximum opening

Low pressure drop

One-Piece BodyOne-piece body construction eliminates seleral pr.ofu-

blems connected lith convenrional flanged joints:

* No need to hold a flat joint gasket uncler highcon)pre5siVe Ioads.

* No large cliameter bolts on lhich the nuts mavstick, freeze or gall.

* No need to spreacl heavv pipe secrions io insl,iector clean seating surfaces.

* N'o pipe cold spring or hor sprirrg.

Further, one-piece body constrr-rction permits use ofthe valve in piping systems u.here ail rrelded conrinu-ous connection is desired.

Pressure-Seql CoverUnique Edrlard,pressure-seal co.r'er design prolides

several operattng. inspection and maintenance adr,an-tages. Inspection and maintenance of disk and seat canbe done u'ithout disrurbine rhe pipine hookup. Simplvremove rhe cover and elervthiirg "is in sight andr,r,ithin reach.

Unlike other valves, the Edr,r'arcl pressure-seal coverrloes not require Iarge diameter- bolts on rvhich rhenrrts may stick, freeze or gall.

The pivot pin covers on the sides oI the r.alr.e arenlso of. Edu'ard plessure-seal design.

.1 l"ll. description of Edn'ard pressure-seal clesignand consrruction advantage is given in Edward Caia-log lZ-H.

4



Gluick,QuiefClosing

The Eclr,varcl tilting clisk check valve is designed t<r

close as quickl,v as possible. It minimizes the loucJ,

damaging slamming ancl vibration caused lr,hen highveiocity reverse flor,r' is allo'u,ecl to build up beforcthe completion of closing"

In boiler feedlr,ater: applications, for example, as

higher pressure units have becorne more common

there has been a resulting increase in feedwater veloci-

ties and slamming, and an increased need for the

features incorporated in the Edward tilting disk check

valve.

Quick closing is achievecl through a co nbinationof several design and constmction features. The diskis dome shaped to avoid hesitation of disk morion orclosing, colnmon to conventional flat disks. The rnostefficient dome shape was selected after full-scale tests

in the Edr.l'ard iaboratories. For minimum pendulumperiod - an important factor in assuring quick closing

- the disk pivot is located one-quarter of the seat

diameter from the seat center..

Ail disk surfaces are open to iine fluid, so that nodashpot action can clelav closing. The disk pivors onpin supports having chrome-plated bearings for mini-mum friction. Tnrsion springs enclosed in the pivotpins heip speed the closing action, although thedisk is counterweighted sufficiently to close aurcr-maticall,v 'lvithout aid from rhe springs r,vhether thevalve is in vertical or in horizontal position. Thesprings exert maximum {orce at full opening. As thesprings are fully enclosed in the pins thev are norsubject to possible harmlul effects of line fluids orforeign matrer. Nor can spring pieces get into thepiping if spring failure should ever occur.

When tested in the Edward Research and Experi-mental Laboratories these springs withstood millionsof open-close-open cycles wirhout failure.

Quick.closing with.rninimtrm moment of inertia {fly wheeleffect] results from iocation of pivot pin at most efficient pivotpoint and from dome shape which avoids closino hesitationcommon to flat disks.

Two aids to quick closingChrome-plated bearings o{ pivot pins and torsion springs en-closed in pins help speed closing action of countenveighfei disk.

PIVOTNEAR CENTER

DOMESHAPE



I

Tight SeotingTight seating results from the unique design and

operation of the new tilting disk coupled with itsmated seat. T'he disk rotates on pins located near butabove its center. The side of the disk opposite itsface is designed to function as a colrnterr.veight. Gravityalone is sufficient to seat the disk lthen the valr'e is

installed in either vertical or horizontal position; how-

ever, a torsion spring is incorporated in each pivotpin to speed closing and thus to help eliminateslamming. At zero velocrt,v, gravity aided by the tor-sion springs tilts the disk into the closed position -that is, the clisk face (inner cone) settles on the seat

iouter cone).

Unlike a s\,ring check valve, which seats against a

flat face the same \\''ay a gate stop valve d<.res, theEdrvard one-piece tilting clisk valve seats on a taperedseat in a manner much like that of a globe stop valve.

Because of this cone-r'r'ithin-a-cone, both gravitv andthe force ol reverse florv l'ork together to promoteperfect alignment and efficient, tieht seating. Theincluded seat angle - rvhich varies from pressttre class

to pressure class - is that angle rvhich experience has

shor,r'n gives efficient seating rvhile rninimizing thepossibility of the disk l'eclging in the seat. These are

continuing advantages, tencling to p1'c1t1ote good align-ment with resulting tight seating even if the pivotsurfaces should become ltotn ftorn prolonged service.

A Stellite faced disk ancl ir-rtegral Stellite seat silethe Edrvard one-piece tiitine disk check valve maxi-mum erosion resistance and assure maximum servicelife rvith minimunr maintenance requilements.

Cone within a cone -

Edwardperfect alignment and efficient,

seat and disk design promotestight seating.

,,,,D./>

Proved in supercritical steam service -

Edward One-Piece Tiit-ing Disk Check Valves installed in Ohio supercritical steamgenerating station operating at pressures above 4500 psi.

Mqximum OpeningThrough a unique nerv design of disk, counterweight

and pivot pin maximurn opening is achieved through-out even the lowest flolv ranges.

In the open position the disk rests against a stop.Thus, there is no excessive r'lear-producing flutter ofthe disk under normal flor'v conditions. On the otherhand a typical s'lr'ing check valve never reaches a stopand is continually moving up and clort'n. Naturally,this tends to wear the pivot pin.

Features of the new disk are its spherically concavebottom which imparts high lift, a thin cross sectiottwhich imparts good coefficient of flow, and unifolmthickness r,r'hich offers best resistance to h)'drostaticpressure.

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Extensive testing of athe Rockwell-Edwardat flows as low as 8

10" one-piece tilting-disk check valve inlaboratories indicated maximum openingfeet Der second.



Low Pressure DropAs sholr''n by the accompanying pressure drop curves,

this series of valves sets ne\r records for lo'r'v Pressureclrop. This is the result of straight-through design,strearnlined body contor-rrs and streamlined clisk.

The typical vah'e teaches full opening at a velocityof 8 feet per seconcl. \Vhen fuilv open the pressuredrop is approximate equivalent to a mere 50 diametersof pipe.

The most econornical valrre is the valve ccrrectlysized. Too small a valve 'r'vill have high pressure dropand will waste po\!'er. T'oo large a valt'e is a h-aste ofmoney. The disk rnay hug the valve seat at lorv flowand cause vibration and wear.

Here is a simple rnethod for checking valve size.

Select the follor,rring data:

\'V -F-lo'u' rate in pounds per hour.

yv -square root of specific volume (basecl on oper-ating pressure and temperature) of fluid in cubicfeet per pouncl. N[a,v be obtained for ltaier andsteam fronr flou,index table.

A -Port area of valve in square inches. llay be

obtained from Valve Port Areas Table forvalve considered.

Insert this clata in the formula y+f : Echr,arcl Florv

Index.

X,{ark this Florv Index on the bottom horizontal lineof the chart and read up to the curve to obtain thepressure drop. For best performance valve should beselected to operate fully open.

rnay be calculated as follcr'vs:

-= x Flow Index.

EXAM PLE :

To determine pressure drop in an Edward 8 in.Fig. 1570 Tilting Disk Check valve when passing900,000 lb/hr Boiler feed\'\'ater at 2650 psi and 500" F.

Frcrn the tables

Vu : .142 ancl .{ : 13.6 sq. in.

Therefore \-L- zOSo

From the Pressure Drop Chart, this shorvs a pressrlreclrop of 1.5 psi.

FLOW INDEX TABLE

fF: Sq. Root of Spec. Vol. cu ttilb-Downstreqm Press. & Temp.

Wcter Temp. F 100 20a 300 400 500 600

1,, t AII Pt"""rr"s (Water) 127 .r29 .132 .136 .r42 .r53

q+^-- T^-n F Soi. s00 600 700 800 900 10C0 1100

r./ v ot PSIG {Steom) 100 1.97 2.20 2.32 2.44 2.54 2 64 2.74 2.84

200 1.46 1.6t ]168 L77 1.85 1 95 2.A0 2.07

300 1.21 1.30 1.38 I.46 1.52 1.60 1.65 1.71

400 I.06 1.11 1.19 1.26 1.32 1.38 1.43 r.47

500 .948 .979 1.06 1.12 t.IB 1.23 t.2e 1.33

600 .865 .895 .960 1.02 1.08 I.13 1.r7 r.22

.880 .941 .994 1.04 1.03 1.I2

747 .815 .875 .926 .972 1.Al 1.05

759 .82r .87A .9r4 .955 .99

1000 .662 .7t0 .733 .816 .865 ,903 .o4

1 I 00 .628 6a7 .732 .781 .823 .860 .90

629 .695 .745 .785 .e22 .86

BOI

70)

I 200

1300 .570 590 .662 .7rA .752 789 .83

1400 559 .633 .683 .723 .752 .79

.58 .63

I 800 54 .5S .63 .66 .69

50 .55

4t .48 .52 5B

31 .42 .46 .49 .52

The fluid velocity

Velocity ft. per sec :

PRESSUR.E DROP CURVES

VATVE PORT AREAS (sq. in.)

or lsize 6 8 I 10 I 12 14 16 I l8 I 20

e E 900 zs.s7 44.18 63.62 90.76 90.76 I32.73 I32.73 I94.33

$ j rsoolzs.sz 44.1s 63.62 90.76 93.76 132.73 132:3 r94'33A isoo tt.tz2s.s7 44.te 63.62is0.76 90.76 132.73i132.73

7



Grade Fl l-Forged Chromium-Molybdenum Steel-ASTM Al82- 587

Carbon. ..%... .....0.i2max.Manganese o/o..... ...0.30to0.80Phosphorus .... .% . .0.04 max.Sulphur ."%... .....0.04max.Silicon ...o/o.. 0.50to1"00Chromium o/o..".. ...1.00to1.50Molybdenum ....%. .0.45to0.65

Minimum Physical Characteristics

Edward Designation: MS 102

TensileStrength,psi... 10,000Yield Point, psi ... ..." 36,000Elongation in 2 in. 22%Reduction in Area 35%Brinell Hardness .. ".. l35min

Tohcila (tra-^+h ^ci 70,000Yield Point, psi ... ..." 40,000Flonoaiion in ) in 2Oo"Reduction in Area 35%Brinell Hardness ... ... i4Omin.


TensileStrength,psi... 70,000vi"la Foi"t, p-ri '.1".. ".. :. :. ". .:.::... ... . +o,oooElongation in 2 in. 20%Reduction in Area 30%Brinell Hardness .... ... l40mirr

Tensile Strength, psi .. " .....125,000to iB5,O00YieldPoint,psi ... ...105,000to150,000tlongation in 2 in. ....2C to25,.Reduction in Area .....60 to10"/oBrinell Hardness ... ..215to450Heat Treatment-The heat treatment of EVallov varies withthe service conditions of the parts.


wear and corrosion resistance.TensileStrength,psi. ....105,00CBrinell Hardness ... ....=50-5DC

Standard disk and cover material. Combines structural stability with good weldability, good high tempera-ture load carrying ability and better than average corrosion and erosion resistance,

Grade F6-EValloy (Stainless Steel)-ASTM Al82-58T Edward Desisnarion: Ms 2rz ot zt+Basic specification for hinge pin spacer ring and bushing material. Has the corrosion resistance typical ofstainless steels as well as excellent structural properties.

Chromlurn-Nickel Sfainless Steet Spring Wire-ASTM 43l3-55 Edward Designaticn: MS 253

Cold drawn, wound, then heat treated for maximum service. Edward labo:atory tested over 1,000,000 cycles.Carbon. ..o/o... .....0.15max.Manganese .. .. oo ..2.00max.Phosphorus %. '. '. ...O.O4max. See Table in ASTM A3l3 latest revision, Physical PropertiesSulphur ..9'"... .....0.03max.5ilicon. .",6.... ....l.OOmax.Chromium 9'" . . . . l8.OO min. to 2O.OC max.Nickel . . .9'". . . . 8.00 min. to 9.50 max.

tnal,

MATERIAL SPECIFICATIONSChemical Analysis-Per Cent

Grade WCB-Cast Carbon Steel-ASTM A2l6-587Used for valve body material for normal service requirements. Meets requirements of ASA Code for PressurePiping and ASME Boiler Code with maximum weldability.

Carbon. ..o/o... .....0.20 1o0.30Manganese o/o,..., ...0.90max.Phosphorus "/o..... ...0.05max.Sulfur ...o/o.. 0.O6max.Silicon . ..7o... .....0.60max.

Carbon. ..%... ."...0.20max.Manganese %..... ...0.50 1o0.80Phosphorus %..... ...0.05max.Sulphur ..o/o... .....0.06max.Silicon " ..%... .....0.60max.Chromium %..... ...l.0Otol.5CMolybdenum . . . .o/o. .0.45 1o 0.65

Carbon. ..%... .....0.08to0.12Manganese ,,,,.o/o ..l,OOmax.Phosphorus %..... ...0.0,1 max.Sulfur ...%.. 0.03max.Silicon. ..%... .....1.00max.Nickel . ..o/"".. .....0.50max.Chromium %..... .11.50to13.5C

Stellite Hard Surfacing for Seats and Disks

Has low coefficient of friction together with rnaximu nr

Chromium ......9," .27.0 to 33.0Tungsten .7o.... ....3.0to 6.0Cobalt. ..0:6." Balance

Grade WC6-Cast Chromium-Molybdenum Steel-ASTM A2l 7 -587 Edward Designation: MS 226

Used for valve body material for service requiring better than average corrosion and erosion resistance. Goodstructural stability and good weldability. Standard material for all counterweights.



STANDARD PREPARATION OF WELDING ENDSConforming to requirements of ASA 816.5-1953 and ASA 816.25-1955

. 450/\ Ioo +

Min. R.

';'*j 1,,. I tr

t6-32For Woll Thickness "f " Greoter lhon l"

Min.

lol"g

IJ

A

I

I

B

A

I

*

B

iI

r + 'olo"i - .ooo,'

I

IBocking Ring

'i, *lrl\r. I

Q[ 1ilFor Woll Thickness "r" t io ;

FIG. 2

lncl usive

'l "Min. R.

FIG. 3

B

Inside Contour for Use With Rectongulor Bocking Ring

FIG.4

Inside Coniour for Use With Toper

l0o +

r + .010n- - .oco',

III

A: Nominql Outslde D-qmerer ol P-peB , Nominql lnside Dromerer of Pitr e

C : A - tr.03l" - 1.75 t 0.010"t

- \ominr] Woll Thickness cf Pr;e

Inside ond outside of weldrng ends of cosi steel vqives io be iinish :nechined ond coreIully inspected where ihe thickness of these ends is lessthon 1.15 r. Edwqrd srqndord procrice rs ro n-qchine ihe oursrde o1 the cqsr ng os shorn ro qroid :horp :e-enrronr ongles ond obruol chrnqes :n- -. - P' -^-" ^{ n-^::*-r ^

'Jo^e d'qme cr r j volve ro hore nc obruor chong-o rr- sectLon. Inside diomc:cr cl vclve mqy be eiLher Jorger or sm:11e:thcn pipe inside diqmeler.

IMPORTANT: When ordering butt welding end valves indi-cate type of ends desired and give pipe schedule fo be used.

STANDARD DIMENSIONS OF VALVE BUTT WELDING ENDS

PIPENOMINAL SCHEDULE

P]PE NO.

ABOUTSIDE INSIDE

DIAMETER DIAMETEROF PIPE OF PIPE

BCRE OFWELDING

LIP

IPIPE-.TALL

THICKNESS

It/z t

120160

XXS

6.625 5.50 i5.1894.897

0.5620.7i80.864

5.3275.072

0.843!.4771.296-I.on1.2181.3121.35-q

Conforming to requirementsoI ASA 8I6.5-1953 andB 16"25- I 955

l-- -jmFnc:^ne diuan i- -r^he3.

+-"s-n-nJi.-s r^r ASA 836.lC

XXS : Double Extro StrongWoll Thickness

Edward stondord costings willmotch ony Schedule from 120

through 160, inclusive. In the

cqse oI pipe heovier thonSchedule 160 hoving ncn-stqndqrd dimensions, Edwordccstings usuclly provideenough extrc mqteriql tcmdtch piplng or ccn be slteredto conform to non-stondordpiping dimensions.

124140

XXS160

7.3277.1637.0s36.998

8.625 7.189" 7.AAt" 6.875" 6.8i3

0.718D.8120.8750.906

124140160

120140160

l0I 0.7s0 9.064

8.75C9.2348.959

l..2641.500

0.8431.0001.125

1.5871.968

1.0001. i 2-q

r.312

" 8.500 8.740ttisa nj so io.ese

" 10.500 10.74a" 10.126 10.413

r .093 1.6391.250 1.8751.406 2.109

12.046ll .77111.498

14.000 11.814" 1 1.500" 11.188

4A60

ilt4

L 6.897I6.515

ll

L8272.1572.389

2.67I..fr

2.6252.952

1.2i81.4381.5S3

13.827t3.44213, 171

IJ.JJJt5.22614.842

124

250876438

l3l3l2

I1I4

I 6.0C0120

160

5001.7i:01.968

I6.s 00t6.064



inc. park, tel: … · 2018-07-05 · a ffi h fl' the principle behind the edward tiltins disk...

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