Series 8000 Butterfly ValvesPressure Class ASME 150-600 / Size 4in – 36in

PRECISION I RELIABILITY I PERFORMANCE

06

01

07

09

08

10

1211

13

0204

03

05

16

17

18

19

20

1415

21

Contents

Series 8000 Butterfly Valves overview 01

Design features & performance benefits 02

Engineering data 02

Valve body style option 04

Disc & seat construction 04

Metal seat & soft seat 04

High performance butterfly valve in detail 05

Flow coefficients 06

Standard dimensions 07

Designed to provide cost effective, reliable control valves for use in low-pressure applications, the high performance Series 8000 valves feature a stainless steel disc with either a soft, or stainless steel seal ring. The soft seal option provides excellent sealing capabilities in both directions. The pressure-assisted stainless steel alternative delivers excellent shut-off against pressure applied in the recommended flow direction for both liquid and gas applications.

Series 8000 Butterfly Valves 01

SERIES

Engineering dataThe Series 8000 range of valves was developed to provide a cost effective, reliable and easily maintained control valve capable of working in low-pressure environments.

End connection sizes

3in (80mm) to 36in (900mm)

Design standard

API 609

Valve body ratings

ASME 150 – ASME 600

Body configurations

Wafer, Lug and Double flanged

Body face to face dimensions

API 609 / Severn Glocon standard

Standard packing

Teflon / Chevrons and Graphite

Plug / Seat leakage class

ANSI/FCI 70.2. Class IV as standard, Class V with metal seat and Class VI with soft seat insert

Design features

Heavy-duty solid body construction provides rigid support

Robust parts for trouble free service and low maintenance costs

Field-replaceable seat located in valve body, away from flow, provides bubble-tight shut off

Available with low noise and anti-cavitation options

Heavy-duty taper pins connect the valve shaft to the disc which avoids lost motion under high torque conditions

Heavy shaft guiding

Wide choice of packing systems

Low friction bearings provide maximum radial support

Performance benefits Full 90° of rotation can be utilised

Increased resistance to cavitation

Lower noise level on higher pressure drop

Reduced inspection and maintenance costs

Excellent flow capacity and control rangeability

Reliable leakage performance. Bubble tight shut off available

High interchangeability between sizes and other products

Manufactured to ISO 9001 certification

02 Series 8000 Butterfly Valves

Series 8000 Butterfly Valves 03

Engineering data (continued)

Construction materials

A wide range of standard materials is available for both the valve pressure parts and trim. These include carbon and stainless steel, duplex/super duplex and high nickel alloys. Stellite, and other hard facings/coatings are available. For full details of materials please contact us.

Paint

A wide range of paint finishes is available including enamel, alkyd gloss and a choice of epoxy types.

Clean build

Severn Glocon adheres to high clean build standards including oxygen clean and an ultra high purity clean room.

Inspection & testing

Severn Glocon undertakes the highest levels of inspection and testing which meet international and customer requirements.

Actuation

We offer a wide range of actuators including Series P Linear Spring Pneumatic Cylinders, Series N Numotor Pneumatic Pistons and Series W Diaphragm Spring Pneumatic Actuators. In addition electric, hydraulic, electro hydraulic actuators and manually operated versions are available.

Instruments

A wide range of control instruments is available from Severn Glocon including positioners, air-filter regulators, volume boosters, solenoid valves, and lock-up valves.

Anti cavitation & low noise

A special trim offers increased resistance to cavitation and a reduction in noise levels on higher pressure drop applications, by improving the valve’s Cf and Ki values.

The design extends the rangeability of conventional butterfly valve discs by ensuring stable and progressively smooth operation in the nearly closed positions of the valve.

Control duties through the full 90° of operation can be utilised. Accurate and repeatable inherent flow characteristics are obtained. The standard is based upon the modified equal percentage curve, others are available for matching a wide range of control system requirements.

Baffle plates

Baffle plates or noise diffusers can be fitted into flanged body styles, or supplied loose. As many as four can be fitted which reduce noise further by splitting the pressure drop so that the pressure recovery factor is reduced.

Baffle plates can be fitted in conjunction with anti cavitation/low noise discs, or they can be offered separately, depending on the application requirements.

04 Series 8000 Butterfly Valves

Valve body style option The Series 8000 valve is available in three basic body styles – wafer, lugged or flanged. Many parts are interchangeable, with the exception of the valve bodies.

Disc & seat construction Double offset and eccentric disc mounting reduces maintenance costs and downtime, even under frequent operation, by minimising the interference between seat and disc to prolong seat life. The seats are held rigidly by the seat retainer which is inserted within the body per API 609 design requirements.

Metal seat & soft seat The virgin PTFE seat has a flexi lip to provide bubble tight shut off in both directions.

Other rigid seats including glass filled PTFE, EPDM and Viton allow a clean flow passage and prevent the deposit of fluid within the seat. Rigid seats allow unidirectional flow (shaft side inlet) providing tight shutoff under positive and vacuum applications.

Flexible metal seats like die pressed stainless steel seats with in built flexibility gives Class IV leakage with minimal torque requirements.

Lug type body

Seat configuration

Double flange body

Metal seated type Soft seated type

Series 8000 Butterfly Valves 05

High performance butterfly valve in detail

Keyway

Shaft

Gland flange

Packing

Packing washer

Bearing

Bearing

Cover plate

Centraliser

Centraliser

Metal seat

Taper pin (hidden)

Vane

06 Series 8000 Butterfly Valves

Flow coefficients CvThe Cv values by definition are related to the flow of water (Specific gravity =1) in US Gallons per minute with a pressure drop of 1psi.

Table 1: Cv factors for 150#

Note: Apply appropriate piping correction factor

Table 2: Cv factors for 300#

Table 3: Cv factors for 600#

Valve size Degrees open

in mm 10° 20° 30° 40° 50° 60° 70° 80° 90°

4 100 6.8 27 63 114 171 248 338 437 451

6 150 16.5 66 154 278 419 607 827 1070 1103

8 200 30.9 124 289 520 784 1135 1584 2002 2064

10 250 52.8 211 492 886 1336 1934 2638 3411 3517

12 300 72.6 29 0 677 1219 1838 2660 3628 4690 4837

16 400 132 531 1230 2229 3361 4865 6634 8845 9287

20 500 207 828 1932 3478 5244 7590 10350 13800 14420

24 600 315 1260 2940 5292 7890 11550 15750 21000 22050

30 750 491 1965 4548 8253 12445 18012 24563 32750 34388

36 900 707 2830 6602 11884 17920 25938 35370 45745 47160

Valve size Degrees open

in mm 10° 20° 30° 40° 50° 60° 70° 80° 90°

4 100 6.2 25 58 104 157 228 310 41 4 435

6 150 14.9 60 139 250 377 546 744 99 2 1041

8 200 27.3 109 255 459 692 1001 1365 1820 1911

10 250 45.6 183 426 767 1156 1673 2282 3042 3194

12 300 63.3 253 590 1063 1602 2319 3168 4217 4428

16 400 109 435 1015 1827 2755 3998 5438 7850 8243

20 500 158 630 1470 2646 3990 5775 7875 10150 12100

24 600 242 966 2254 4057 6118 8855 12075 16100 17006

30 750 404 1614 3766 6779 10222 14795 20175 26900 28245

Valve size Degrees open

in mm 10° 20° 30° 40° 50° 60° 70° 80° 90°

4 100 5.8 23 54 98 147 213 290 375 387

6 150 14.7 59 137 247 372 538 734 950 979

8 200 26.8 107 250 451 679 983 1341 1734 1788

10 250 41.2 165 384 692 1044 1411 2060 2665 2747

12 300 58.4 233 545 981 1479 2140 2918 3774 3891

16 400 96 385 899 1619 2423 3533 4818 6231 6424

Series 8000 Butterfly Valves 07

Flow coefficients CvThe Cv values by definition are related to the flow of water (Specific gravity =1) in US Gallons per minute with a pressure drop of 1psi.

Standard dimensions

Lug type butterfly valve

Double flange butterfly valve

08 Series 8000 Butterfly Valves

Standard dimensions

Table 4: Dimensions of Class 150 Valve

Table 5: Dimensions of Class 300 Valve

Table 6: Dimensions of Class 600 Valve

Valve size DIM LUG DIM DIM DIM DIM

in mm A B D E Ø F Ø S

3 80 48 86 127 91 70 15.88

4 100 54 105 146 93 92 15.88

6 150 59 130 178 97 141 19.05

8 200 64 153 206 97 185 25.40

10 250 71 201 225 104 234 31.75

12 300 82 241 270 123 283 38.10

16 400 102 306 322 176 370 44.45

20 500 127 354 384 194 467 57.15

24 600 154 418 438 200 557 63.50

30 750 171 577 524 222 711 76.20

36 900 213 816 622 207 855 95.25

Valve size DIM LUG DIM DIM DIM DIM

in mm A B D E Ø F Ø S

3 80 49 77 127 91 70 15.88

4 100 54 105 146 93 92 15.88

6 150 59 139 178 97 141 25.40

8 200 73 185 206 104 179 31.75

10 250 83 200 238 123 229 38.10

12 300 92 266 280 175 272 44.45

16 400 133 415 355 199 348 57.15

20 500 160 480 416 222 437 76.20

24 600 183 549 492 226 523 88.90

30 750 226 774 581 229 692 114.30

Note:

1 For other sizes and rating consult factory2 For dimensions where unit is not indicated consider the unit as “mm”3 Dimensions shown may vary depending upon options selected on actual product4 Also available in flanged

Valve size DIM LUG DIM DIM DIM DIM

in mm A B D E Ø F Ø S

3 80 54 89 127 91 64 15.88

4 100 64 130 152 97 87 19.05

6 150 78 172 193 104 132 31.75

8 200 102 204 232 123 160 38.10

10 250 117 336 279 176 202 44.45

12 300 140 373 320 191 246 57.15

16 400 178 479 407 238 320 76.20

Series 8000 Butterfly Valves 09

Standard dimensions

Note: DP (Pressure Drop) in psi

The torque to open = unseating torque + packing torque + frictional torqueConversion: 1lb in = 0.1129 Nm 1Nm=8.85lb in

Table 7: Torque values to unseat the valve from closed position (150lb rating)

Table 8: Torque values to unseat the valve from closed position (300lb rating)

Unseating [A+B (∆P)]

Valve size Shaft size

(lb in)

Packing Friction Soft seated Metal seated (up to 200 °C) Fire safe

in mm A B A B A B (lb in) (lb in)

4 100 0.75 180 0 .9 360 0.9 225 1.12 74 0.51

6 150 0.75 264 1.32 520 1.32 330 1.56 74 1.4

8 200 1 438 2.19 875 2.19 548 2.74 99 3.3

10 250 1 660 3 .3 1950 4.87 825 4.12 99 5.0

12 300 1.25 1050 5.05 3150 7.87 1312 6.56 124 9.2

14 350 1.5 1400 7 4200 10.5 1750 8.75 222 15

16 400 1.5 1920 9.6 5800 14.5 2400 12 222 18.5

18 450 1.75 2400 12 7200 18 3000 15 259 28.5

20 500 2 2910 14.5 9000 22.5 3638 18.2 296 40

24 600 2.25 4400 22 13200 33 5500 22 334 67

28 700 2.5 5750 28.75 17100 42.75 7181 35.93 371 103

30 750 3 6600 33 19800 49.5 8250 41.25 445 144

32 800 3 7650 38.25 23000 57.5 9560 47.8 445 165

Unseating [A+B (∆P)]

Valve size Shaft size

(lb in)

Packing Friction Soft seated Metal seated (up to 200 °C) Fire safe

in mm A B A B A B (lb in) (lb in)

4 100 0.75 180 0.9 360 0.9 225 1.12 74 0.51

6 150 1 264 1.32 520 1.32 330 1.56 99 1.4

8 200 1.25 438 2.19 875 2.19 548 2.74 124 3.3

10 250 1.25 660 3.3 1950 4.87 825 4.12 124 5.0

12 300 1.5 1050 5.05 3150 7.87 1312 6.56 222 9.2

14 350 2 1400 7 4200 10.5 1750 8.75 296 15

16 400 2 1920 9.6 5800 14.5 2400 12 296 18.5

18 450 2.25 2400 12 7200 18 3000 15 334 28.5

20 500 2.75 2910 14.5 9000 22.5 3638 18.2 408 40

24 600 3 4400 22 13200 33 5500 22 445 67

28 700 3.5 5750 28.75 17100 42.75 7181 35.93 519 103

30 750 3.5 6600 33 19800 49.5 8250 41.25 519 144

32 800 3.5 7650 38.25 23000 57.5 9560 47.8 519 165

01 Severn Glocon Group plc Gloucester England UK

Mars Valve UK Gloucester England UK

L.B.Bentley Stroud England UK

Ionex SG Nailsworth England UK

02 Severn Unival Brighouse England UK

03 Severn Subsea Technologies Redruth England UK

04 Severn Unival Widnes England UK

05 Severn Ball Valves Aberdeen Scotland UK

06 Severn Norway Bergen Norway

07 Severn Glocon Atlantic Canada Newfoundland Canada

08 Severn Glocon Calgary Canada

09 Severn Glocon Houston Texas USA

10 Severn Glocon Rio Brazil

11 Severn Valve Solutions Basra Iraq

12 Severn Glocon Saudi Arabia

13 Severn Glocon Doha Qatar

14 QTRCO SG Dubai

15 Severn Glocon FZE Dubai

16 Severn Glocon India Chennai India

17 Severn Glocon Kuala Lumpur Malaysia

18 Severn Glocon Australia Perth Australia

19 Severn Glocon Beijing China

20 Severn Glocon Seoul Korea

21 Severn Glocon Tokyo Japan

06

01

07

09

08

10

1211

13

0204

03

05

16

17

18

19

20

1415

21

The Severn Glocon Group policy is one of continuous improvement and

we reserve the right to modify these specification details without notice. Brochure design by verycreativepeople.co.uk

PRECISION I RELIABILITY I PERFORMANCE

Olympus Park Quedgeley Gloucester Gloucestershire GL2 4NF England

T. +44 (0)845 223 2040 F. +44 (0)845 223 2041 sales@severnglocon.co.uk www.severnglocon.com