butterfly valve of stainless steel pn 16 pn...

41002.06.1998

SENTO OY HÖGFORSP.O.BOX 13, FIN-24101 SALO, FINLANDTEL + 358 2 727 7200FAX + 358 2 727 7201

Butterfly valveof stainless steelPN 16PN 10

Design

The butterfly valve is flangeless and has a double eccentricdisc. The disc is mounted to the shaft with tangential conicalkeys. The stuffing box can be tightened.The butterfly valve is supplied complete with optionalactuators- lever for DN 80... 200 valves besides with metal seal DN 80...150 valves- manual gear for DN 80...600 valves- electric, pneumatic or hydraulic actuator for DN 80 ...600 valves.

Face to face lenghts according to ISO 5752 series 25

The mounting is between drilled flanges according toDIN 2501 PN16 PN10

Nominal sizes DN 80...600

The following classification societies have approvedthese valvesDet Norske Veritas DN 80...600Bureau Veritas DN 80...600Maritime Register of Shipping DN 80...600

Operation

The butterfly valve is a stop and regulating valve whichis tight for both directions of flow. The valve is used indemanding industrial pipelines.

Nominal pressure 16 bar DN 80 ... 25010 bar DN 300 ... 600

Disc seal alternatives- FPM (Viton) chemical-resistant + 150°C- EPDM heat-resistant + 100°C- NBR (Nitril) oil-resistant + 80°C- PTFE chemicals + 180°C- AISI 316 + 260ºC

Maximum closing pressure difference depends on theworking temperature

Pres

sure

(MPa

)

Temperature (°C)

Pres

sure

(bar

)

Code number Seal

410 VS_ _ _ FPM (Viton)410 ES_ _ _ EPDM410 NS_ _ _ NBR (Nitril)410 TS_ _ _ PTFE410 CS_ _ _ AISI 316

41002.06.1998


Seal alternatives

Parts

1. Body W:no 4408 2. Counter flange W:no 4408 3. Disc W:no 4408 4. Subshaft cover W:no 4401 5. Gland W:no 4401 6. Spacer ring W:no 4401 7. Subshaft W:no 4460 8. Retaining ring W:no 4401 9. Stem W:no 446010. Key Fe 7011. Bearing plate12. Stem bearing13. Subshaft bearing14. Bottom cover gasket15. Box packing PTFE-10916. Seat ring FPM, EPDM, NBR

PTFE, AISI 31617. Gasket18. Gasket19. Conical key20. Stud bolt21. Hexagonal nut22. Socket screw23. Socket screw

PN 10 PN 16 NDN PN D d1 h1 L H h a b c kg

D1 d D1 d

80 16 138 15 105 49 116 115 85 26 11 160 ø18 160 ø18 8 8100 16 158 20 112 56 132 125 85 26 11 180 ø18 180 ø18 8 9125 16 188 20 112 64 144 136 85 26 11 210 ø18 210 ø18 8 12150 16 212 25 118 70 180 161 105 45 11 240 ø23 240 ø23 8 16200 16 268 25 118 71 205 186 105 45 11 295 ø23 295 ø23 1)12 30250 16 320 30 123 76 248 220 105 45 11 350 ø23 355 ø27 12 39300 10 370 35 129 83 280 260 110 48 14 400 ø23 410 ø27 12 60350 10 430 35 129 92 305 290 110 48 14 460 ø23 470 ø27 16 73400 10 482 45 156 102 350 315 140 60 18 515 ø27 525 ø30 16 109450 10 532 45 156 114 375 340 140 60 18 565 M24 585 M27 3)8+16 131500 10 585 60 203 127 458 390 150 60 22 620 M24 650 M30 3)8+16 197600 10 685 70 219 154 530 450 175 75 22 725 M27 770 M33 3)8+16 340

1) PN 10 = 8 pcs2) with actuator3) stud bolts

Connection

qty

Dimensions

Butterfly valve

AISI 316 EPDM PTFE+C hard chromed NBR

FPM

Weight 2) kg

41002.06.1998


Butterfly valvesActuators

Butterfly valves are supplied with following actuator options:- a lever or gear,- electric , pneumatic or hydraulic actuators.

Hand leverA lever is suitable for manual operation of small sizes ofbutterfly valves DN 80 to 200, except for valves withmetal to metal seats, where gear and handwheel is used insize DN 200 and larger. The position of the disc can befirmly fixed in any position between open and closedby the locking device incorporated. The hand lever is sup-plied positioned crosswise to the pipe with the valve closed.

Manual gear

The valves are supplied with gearbox and handwheel.The disc position is shown by a mechanical indicatoron the actuator.

Dimensions

DN D L h H3 a b c d

80 138 49 115 243 176 52 211 203100 158 56 125 259 176 52 227 203125 188 64 136 271 176 52 239 203150 212 70 161 321 202 67 282 203200 268 71 186 346 202 67 307 203250 320 76 220 389 247 67 350 305300 370 83 260 434 264 90 390 305350 430 92 290 459 264 90 415 305400 482 102 315 526 362 123 470 457450 532 114 340 551 362 123 495 457500 585 127 390 685 387 154 608 457600 685 154 450 790 505 181 695 457

Dimensions

DN A H2 h

80 300 255 115 100 300 270 125 125 300 285 136 150 420 330 161 200 420 355 186

41002.06.1998


Regulating curvesThe diagram presents the K-values of butterfly valves- the capacity factors for different disc positions

41002.06.1998


The effect of conesOften it is advantageous to choose a valve one or twonominal sizes smaller than the pipe. When the openingangle of the inlet cone is under 40°, the effect of conescan be approximately determined by the following table.

Picture 1:

The consistency of the mass Coefficient

Picture 2. Piping geometry factor Fp and pressure drop ratiofactor XTP of butterfly valve

GasesFpKv = 36000 w

Ψ √ ρ1∆pKv = capacity of valve (picture 1 )

Fp = piping geometry factor (picture 2)

w = mass rate (kg/s)

k1 = gas density (kg/m3) incoming

∆p = pressure drop (Pa) over valve

Y = expansion factor

∆pY = 1-

Butterfly valves. Guidelines for choosingMassWhen the flowing medium is a mass the necessary capacitycoefficient depends among other things on the rate of flowand the quality of the mass. For practical needs the approxi-mate constants can, however, be determined, and whenmultipled the requisite capacity coefficient can be obtainedin each case.

∆pmax = Fkp1xTP

Ymin = 0,67{

Fk = factor dependent of specific heats rate(example for air Fk = 1,0 and for steamFk = 0,94)

p1 = the absolute incoming pressure (Pa)

xTP = pressure drop ratio factor specific for valvetype (picture 2)

1) watervapor density is on sheet "Water characteristics"Pipe size D = 200 mmRequired capacity

Butterfly valve DN 150

Maximum capacity

kg/s

(picture 1)

Example :Superheated steam

1 % 1,102 % 1,253 % 1,454 % 1,65

3Fkp1xTP

= > α =

butterfly valve of stainless steel pn 16 pn...

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