Butterfly Valves / Bray S36

Дисковые затворы

Designed specifically for highly abrasive and corrosive service, Bray’s Series 35N/36N large diameter, resilient seated butterfly valves meet the process requirements with chloride content from low to very high parts per million at a maximum rating of 150 psi.

Specifications

[Translate to English:] Исполнение: Серия 32/33 - межфланцевая установка
Серия 35/36 - фланцевое исполнение
Условный проход DN, mm: 550…2400
Условное давление PN, Bar: 6/10/16
Макс. давление: 5 Bar для серии 32/35
10 Bar для серии 33/36
16 Bar для серии 36H
Материалы* корпуса: Серый чугун GG25 с покрытием Nylon 11
Высокопрочный чугун GGG40.3 с покрытием Nylon 11
Нержавеющая сталь ASTM A351 Type316 (EN 1.4408) Углеродистая сталь ASTM A216 WCB (EN 1.0446)
Диск: Серый чугун GG25 с покрытием Nylon11
Высокопрочный чугун GGG40 с покрытием Nylon11
Нержавеющая сталь ASTM A351 Type 316 (EN 1.4408)
Алюминиево-бронзовый сплав ASTM B148-954
Hasteloy C4
Вал: Нержавеющая сталь ASTM A564 (EN 1.4542)
Hasteloy C-276
Уплотнение: EPDM (-40...+121oC)
Buna-N (NBR) (-18...+100oC)
FKM (Viton) (-18...+204oC)
Привод: редуктор / пневмопривод / гидропривод / электропривод
Дополнительное оборудование: сигнализаторы положений / позиционеры / золотниковые распределители

Datasheet

The Series 35/36 are full-flanged versions rated at 75 and 150 psi respectively. This valve series has many of the design features and benefits of the smaller Bray valves, such as high Cv ratings, minimum parts exposed to the line media, greater reliability and a proven record of long service life. Engineering innovation and exceptional quality are the focus of Bray’s unique design  features.

body (A) One piece full flanged style. All bodies are drilled to be compatible with ANSI 125/150, PN 10 or other international flange standards. The valves may be bolted to allow downstream flange removal or cross-bolted for maximum resistance to line stresses.


Disc (B)
Bray’s high strength discs are first cast, then the sealing edges are spherically machined. These edges are then either hand polished or Nylon 11 coated. This process provides 360° concentric seating bi-directional bubble-tight shut off, minimum torque and longer seat life. The symmetrical disc profile increases Cv values, reduces turbulence and increases pressure recovery. The disc O.D. clearance is designed to work with all standard piping.


Seat (C)
One of the valve’s key elements is Bray’s unique Tongue & Groove seat design which fully isolates from line media. The Bray resilient seat offers lower torque than many valves on the market today and is excellent for most vacuum services. The tongue and groove seat to body retention method is the most advanced design in the industry, making field replacement simple and fast. A strategically located molded-in O-ring eliminates the requirement of flange gaskets. Bray’s seat has been specifically designed to seal with slip-on or weldneck flanges.

Primary seal (d)
The primary seal is achieved by preloaded contact of spherically machined hand polished
disc hubs with unique molded seat flat surfaces. This sealing method isolates the flowing media from the stem and body material at all angles of valve disc seating.

Secondary SEAL (E)
A secondary seal is achieved by an interference fit of the stem and seat hole diameters.

BLOW-OUT PROOF STEM (F)
Series 35N/36N valves feature blow-out proof stem protection. A retaining ring, installed between the machined stem groove and gland retainer step, provides full retention of the stem in the unlikely event of internal stem failure.

ADJUSTABLE PACKING SYSTEM (G)
Bray’s design allows for field adjustment of stem packing without removing manual operators or power actuators. The packing system consists of a bronze gland retainer, gland ring, studs, nuts, and lock washers.

STEM PACKING (H)
The advanced, self-adjusting V-Type stem packing offers bi-directional sealing which prevents external substances from entering the upper stem bore. This packing is also externally adjustable if needed. It functions well for vacuum applications and provides a third pressure seal in emergency situations.

STEM BEARINGS (I)
To absorb actuator side thrusts and minimize bearing friction / operating torque, upper and
lower heavy wall bronze sleeve bearings are utilized.

VERTICAL THRUST BEARING (J)
A bronze vertical thrust bearing eliminates disc displacement due to the weight of the stem and disc.

ACTUATOR MOUNTING FLANGE AND STEM CONNECTION (K)
Due to a modular concept of design, all Bray manual gear operators and pneumatic
or electric actuators mount directly to Bray valves. No brackets or adapters are required.

Specifications

Components

Item Description

1

Body

2

Seat

3

Disc

4

Stem

5

Bottom Plate

6

Packing

7

Bearing

8

Taper Pin

9

O-ring

10

Nut

11

Lock Washer

12

Thrust Bearing

13

Gasket

14

Screw

15

Key

16

Packing Gland

17

Retainer

18

Bushing

RECOMMENDED SPECIFICATIONS FOR BRAY SERIES 35N/36N:
•Internal disc- to-stem connection to eliminate external disc screws, taper pins or other mechanical fasteners, thus preventing disc-to-stem connection failures due to erosion and corrosion and any potential leak path through the disc.
• Seat totally encapsulates the body and stem isolating it from the line media.
• Tongue-and-groove seat design with primary hub seal and molded O-ring suitable for weld-neck and slip-on flanges, with no flange gaskets required.
• Blow-out proof stem retention. Spherically machined, hand polished disc edge and hub for minimum torque and maximum sealing capability.
• Equipped with an externally adjustable stem packing system that allows packing adjustment without removing operator or actuator.
• Upper/lower bronze stem bearings absorb actuator side thrusts and minimize friction and torque.
• Double flanged bodies.
• Valves are bi-directional, and every valve is tested to 110% of full differential pressure rating (?P).

BODY:
• Cast Iron ASTM A126 Class B
• Ductile Iron ASTM A536 Gr. 65-45-12
• Cast Steel ASTM A216 Gr. WCB
• 316 Stainless Steel ASTM A351 CF8M


DISC:
• Nylon 11 Coated, Ductile Iron ASTM A536
• 316 Stainless Steel ASTM A351 CF8M
• 304 Stainless Steel ASTM A351 CF8M
• Aluminum Bronze ASTM B148 Alloy C95800
• Monel® ASTM A494 Grade M-35-1
• Hastelloy® - Consult factory for Alloy
• Duplex Stainless Steel, such as
ASTM A995 Grade 5A
• Super Austenitic Stainless Steel
ASTM A351 Gr. CK3MCuN (254 SMO™)

SEAT:
• EPDM • Buna-N (NBR) 

STEM:
• 416 Stainless Steel ASTM A582 Type 416
• 304 Stainless Steel ASTM A276 Type 304
• 316 Stainless Steel ASTM A276 Type 316
• 17-4 PH per ASTM A564 Type 630
• Monel® ASTM B164 Alloy UNS 04400
• Duplex Stainless Steel, such as A STM A479 S31651
• Super Austenitic Stainless Steel A STM A276 UNS N08367 (AL-6XN®)

PACKING:
Buna-N (NBR)


BEARINGS:
L uberized Bronze


THRUST BEARING:
Bronze

PRESSURE RATINGSFor bi-directional bubble-tight shut off, disc in closed position:Series 32 : 550mm-900mm 75 psigSeries 33 : 550mm-900mm 150 psigSeries 35 : 550mm-1800mm 75 psigSeries 36 : 550mm-1800mm 150 psig

Cv VALUES - VALVE SIZING COEFFICIENT BRAY SERIES 35N/36N

Valve Size

Disc Position (degrees)

mm

ins

90°

80°

70°

60°

50°

40°

30°

20°

10°

600

24

33,154

27,186

18,235

11,040

6,962

4,244

2,378

1,028

259

700

24

33,154

27,186

18,235

11,040

6,962

4,244

2,378

1,028

259

800

24

33,154

27,186

18,235

11,040

6,962

4,244

2,378

1,028

759

900

24

77,154

27,186

18,235

11,040

6,962

4,244

2,378

2,028

759

1000

24

130,154

27,186

18,235

11,040

6,962

8,244

2,378

1,028

959

1050

24

77,154

27,186

18,235

11,040

6,962

4,244

2,378

2,028

759

1200

24

103,154

27,186

18,235

11,040

6,962

8,244

2,378

1,028

959


Max

Min

EPDM

121°C      +250°F

-40°C     -40°F

Buna-N

100°C      +212°F

-18°C      -0°F

FKM*

204°C      +400°F

-18°C      -0°F

 

Dimensions

SERIES 32/33 Wafer*

Valve Size

А

В

С

D

E

F

Mounting Flange Drig.

G

Series 32

Series 33

L

weight
(kg.)

mm

ins

PCD

No
holes

Hole
?

H

J

Key
Size

К

H

J

Key
size

К

600

24

710

154

591

654

495

210

165

4

22

63,5

60

100

18x11

574

60

100

18x11

575

446

190

700

28

796

165

675

756

580

300

254

8

17,5

63,5

60

100

18x11

654

60

100

18x11

655

502

263

750

30

868

167

743

813

584

210

165

4

22

76,2

60

100

18x11

728

75

100

20x12

730

529

300

800

32

903

190

772

856

670

300

254

8

17,5

76,2

60

100

18x11

751

75

100

20x12

752

556

356

900

36

1033

203

895

972

737

300

254

8

17,5

88,9

75

100

20x12

877

85

130

22x14

878

633

479

SERIES 35N/36N Double Flanged

Valve size

А

В

С

D

E

F

Mounting Flange Drig.

G

Series 32

Series 33

L

Weight
(kg.)

mm

ins

PCD

No.
Holes

Hole
?

H

J

Key
Size

К

H

J

Key
Size

К

600

24

845

154

591

654

495

210

165

4

22

63,5

60

100

18x11

574

60

100

18x11

575

446

227

700

28

960

165

675

756

580

300

254

8

17,5

63,5

60

100

18x11

654

60

100

18x11

655

502

333

750

30

984

167

743

813

584

210

165

4

22

76,2

60

100

18x11

728

75

100

20x12

730

529

388

800

32

1060

190

772

856

670

300

254

8

17,5

76,2

60

100

18x11

751

75

100

20x12

752

556

458

900

36

1168

203

895

972

737

300

254

8

17,5

88,9

75

100

20x12

877

85

130

22x14

878

633

613

1000

40

1235

216

975

1056

782

300

254

8

17,5

101,6

85

130

22x14

951

100

100

28x16

952

655

985

1050

42

1346

251

1048

1124

845

300

254

8

17,5

101,6

85

130

22x14

1021

100

130

28x16

1022

706

1171

1200

48

1511

276

1200

1286

952

415

356

8

33

127

100

130

28x16

1172

125

150

32x18

1173

789

1487

Dimensions for the Series 36 valve are the same except for a larger Key Size, H, J and K  dimension. Dimensions for 1150mm and 1400mm-1800mm  Series 35 and Series 36 valves differ and are listed separately.

 

All statements, technical information, and recommendations in this bulletin are for general use only. Consult Bray representatives or factory for the specific requirements and material selection for your intended application. The right to change or modify product design or product without prior notice is reserved.

Technical Information*