Butterfly Valve Series 30/31, DN 50 ... DN 500
Bray® Controls is proud to offer a high quality line of butterfly valves to meet the requirements of today’s market. Combining years of field application experience, research and development, Bray has designed many unique features in the Series 30/31 not previously available. The results are longer service life, greater reliability, ease of parts replacement and interchangeability of components.
Specifications
Version: | Series 30 - wafer Series 31 - lug |
Diameter nominal-metric DN, mm: | 50…500 |
Pressure nominal PN, Bar: | 10/16/25 |
Max pressure: | 16 Bar for DN50…DN300 12 Bar for DN350…DN500 16 Bar for DN50…DN300 (Series 31H) 25 Bar for DN50…DN300 (Series 31U) |
Velocity limits: | fluids: 9 m/s gases: 54 m/s |
Body material*: | GG25 Coated Grey Cast Iron GGG40.3 Coated Ductile Iron 1.0446 Carbon Steel AlSi7Mg Aluminium |
Disk: | Nylon11 coated GGG40 Ductile Iron Halar coated GGG40 Ductile Iron 1.4408 Stainless Steel ASTM B148-954 Aluminium Bronze |
Stem: | 1.4401 Stainless Steel 1.4301 Stainless Steel 1.4005 Stainless Steel Monel K500 |
Seat: | EPDM (-40...+121 C) Bonded EPDM (-40...+121 C) Buna-N (NBR) (-18...+100 C) Bonded Buna-N (NBR) (-18...+100 C) FKM (Viton) (-18...+204 C) |
Actuator: | handle / gear operator / pneumatic actuator /electric actuator |
Accessories: | SS actuator / positioners / solenoid valves |
*other materials are available upon request
Datasheet
POLYESTER COATING CORROSION PROTECTION
Bray’s S30 standard product offers valve bodies with a polyester coating, providing excellent corrosion and wear resistance to the valve’s surface. The Bray polyester coating is a hard, gloss red finish.
Chemical Resistance – resists a broad range of chemicals including: dilute aqueous acids and alkalies, petroleum solvents, alcohols, greases and oils. Offers outstanding resistance to humidity
and water. Weatherability– outdoor tested resistant to ultra-violet radiation. Abrasion Resistance – excellent resistance to abrasion. Impact Resistance –withstands impact without chipping or cracking.
FEATURES
• Unique “tongue and groove” seat design, bonded to the body by aerospace adhesive, is designed to seal with slip-on or weld-neck flanges. Seat totally encases the valve interior to isolate the line media from the body.
• Molded seat O-ring provides seal between valve and pipe flanges. Flange gaskets should not be used with this valve.
• Primary and secondary seals are interference fits between seat and disc hub, and stem and seat stem hole respectively.
• Series 31H Lug valves are drilled and tapped to meet ANSI Class 125/150 and PN16 flanges.
• Valves are bidirectional and every valve is tested to 110% of full pressure rating.
• The unique close tolerance, double “D” connection drives the valve disc. This design eliminates the need for exposed stem retention components, such as disc screws, to the line media which commonly results in leak paths, corrosion, and vibration failures. Due to wear and corrosion, disc screws often require difficult machining for disassembly. Disassembly of the Bray stem is simply a matter of pulling the stem out of the disc.
• Disc edge sealing surface is spherically machined and hand polished to provide a bubble tight shut-off, with minimum torque and an extended seat cycle life.
• Patented “Spirolox®” retaining ring and stem retaining C-rings provide a blow-out proof stem.
EPDM -40 ... +l20°C
Buma-N -15 ...+100°C
Viton -40 ...+200°C
Nylon -29 ... + 95°C
DISC AND STEM CONNECTION (A)
Features a high-strength through stem design. The close tolerance, double “D” connection that drives the valve disc is an exclusive feature of the Bray valve. It eliminates stem retention components being exposed to the line media, such as disc screws and taper pins, which commonly result in leak paths, corrosion, and vibration failures. Disc screws or taper pins, due to wear and corrosion, often require difficult machining for disassembly. Disassembly of the Bray stem is just a matter of pulling the stem out of the
disc. Without fasteners obstructing the line flow, the Series 30/31 Cv values are higher than many other valves, turbulence is reduced, and pressure recovery is increased. The stem ends and top mounting flange are standardized for interchangeability with Bray actuators.
DISC (B)
Casting is spherically machined and hand polished to provide a bubbletight
shut off, minimum torque, and longer seat life. The disc O.D. clearance is designed to work with all standard piping.
STEM RETAINING ASSEMBLY (C)
The stem is retained in the body by means of a unique Stainless Steel “Spirolox®” retaining ring, a thrust washer and two C-rings, manufactured from brass as standard, stainless steel upon request. The retaining ring may be easily removed with a standard hand tool. The stem retaining assembly prevents unintentional removal of the stem during field service.
STEM SEAL (E)
Double “U” cup seal design is self-adjusting and gives positive sealing in both directions. Prevents external substances from entering the stem bore.
NECK (F)
Extended neck length allows for 2" of piping insulation and is easily accessible for mounting actuators.
PRIMARY AND SECONDARY SEALS (G)
The Primary Seal is achieved by an interference fit of the moulded seat flat with the disc hub. The Secondary Seal is created because the stem diameter is greater than the diameter of the seat stem hole. These seals prevent line media from coming in contact with the stem or body.
(I) Disk seal
FLANGE LOCATING HOLES (K)
Provide quick and proper alignment during installation.
BODY (L) One-piece wafer or lug style. Polyester coating for excellent corrosion resistance. Bray valve bodies meet 12 bar pressure ratings for hydrostatic test requirements.
DESIGN FEATURES
Bray’s Series 30 valve is a wafer version with flange locating holes, and the Series 31 is the companion lug version for dead-end service and other flange requirements. All Bray valves are tested to 110% of full pressure rating before shipment. A major design advantage of Bray valve product lines is international compatibility. The same valve is compatible with most world flange standards - BS EN 1092-1, PN 10/16, DIN ND, ANSI125/150, BS10 Table D/E, AS 2129. In addition the valves are designed to comply with ISO 5752 face-to-face and ISO 5211 actuator mounting flanges. Therefore, one valve design can be used in many different world markets. Due to a modular concept of design, all Bray® handles, manual gear operators and pneumatic and electric actuators mount directly to Bray valves. No brackets or adapters are required.
Nylon 11
NYLON 11 COATING
Optionally available for valve bodies where outstanding protection and performance is needed. A thermoplastic produced from a vegetable base, this
coating is inert to fungus growth and molds. Nylon 11 is USDA Approved, as well as certified to ANSI /NSF 61 for water service. Corrosion Resistance – superior resistance to a broad range of chemical environments. Salt spray tested in excess of 2,000 hours and seawater immersion tested for over 10 years without corrosion to metal substrates. Nylon 11 features a very low coefficient of friction and excellent resistance to impact and ultra-violet radiation.
Dimensions
Series 30 Series 31
DN
|
А |
B |
C |
D |
E |
F |
Mounting Flange Drig. |
G |
H |
J |
K |
L | Lug Bolting Data* | |||||
mm | ins | 1+ | 2+ | 3+ | 1+ | 2+ | 3+ | |||||||||||
50 | 2 | 94 | 43 | 51 | 72 | 140 | 90 | 70 | 4 | 9.5 | 14 | 10 | 32 | 33 | 51 | 125 | 4 | M16 |
65 | 21?2 | 106 | 46 | 64 | 85 | 152 | 90 | 70 | 4 | 9.5 | 14 | 10 | 32 | 49 | 59 | 145 | 4 | M16 |
80 | 3 | 124 | 46 | 76 | 102 | 159 | 90 | 70 | 4 | 9.5 | 14 | 10 | 32 | 65 | 67 | 160 | 8 | M16 |
100 | 4 | 154 | 52 | 102 | 131 | 178 | 90 | 70 | 4 | 9.5 | 16 | 11 | 32 | 91 | 87 | 180 | 8 | M16 |
125 | 5 | 181 | 56 | 127 | 156 | 190 | 90 | 70 | 4 | 9.5 | 19 | 13 | 32 | 118 | 107 | 210 | 8 | M16 |
150 | 6 | 206 | 56 | 146 | 178 | 203 | 90 | 70 | 4 | 9.5 | 19 | 13 | 32 | 138 | 120 | 240 | 8 | M20 |
200 | 8 | 267 | 60 | 197 | 241 | 241 | 150 | 125 | 4 | 14 | 22 | 16 | 32 | 189 | 153 | 295 | 12 | M20 |
250 | 10 | 324 | 68 | 248 | 291 | 273 | 150 | 125 | 4 | 14 | 30 | 22 | 50 | 242 | 188 | 350 | 12 | M20 |
300 | 12 | 378 | 78 | 298 | 342 | 311 | 150 | 125 | 4 | 14 | 30 | 22 | 50 | 291 | 213 | 400 | 12 | M20 |
DN |
А |
B |
C |
D |
E |
F | Mounting Flange Drig. |
G |
J |
KEY |
K |
L | Lug Bolting Data* | |||||
mm | ins | 1+ | 2+ | 3+ | 1+ | 2+ | 3+ | |||||||||||
350 | 14 | 430 | 78 | 337 | 388 | 346 | 150 | 125 | 4 | 14 | 35 | 51 | 10?10 | 331 | 238 | 460 | 16 | M20 |
400 | 16 | 484 | 102 | 387 | 442 | 375 | 150 | 125 | 4 | 14 | 35 | 51 | 10?10 | 377 | 273 | 515 | 16 | M24 |
450 | 18 | 537 | 108 | 438 | 495 | 406 | 210 | 165 | 4 | 21 | 50 | 64 | 10?12 | 428 | 305 | 565 | 20 | M24 |
500 | 20 | 591 | 127 | 489 | 548 | 438 | 210 | 165 | 4 | 21 | 50 | 64 | 10?12 | 475 | 348 | 620 | 20 | M24 |
Actuator Mounting Flange ISO recess dimensions. | Specifications | Lug Bolting Data* |
50mm – 150mm F07 | Diameter(mm) 50-300 | †1. Окружность центров отверстий |
EXPECTED SEATING/UNSEATING TORQUES (Nm)
Diameter
|
А
|
B |
C | |||||||||||||
?Р (Bar) | ?Р (Bar) | ?Р (Bar) | ||||||||||||||
mm | ins | 0 | 3.5 | 7 | 10 | 12 | 0 | 3.5 | 7 | 10 | 12 | 0 | 3.5 | 7 | 10 | 12 |
50 | 2 | 12 | 13 | 13 | 14 | 14 | 14 | 14 | 15 | 15 | 16 | 17 | 17 | 18 | 19 | 20 |
65 | 21?2 | 19 | 20 | 21 | 22 | 23 | 21 | 22 | 23 | 24 | 25 | 26 | 28 | 29 | 30 | 31 |
80 | 3 | 25 | 27 | 28 | 30 | 31 | 28 | 29 | 31 | 33 | 34 | 35 | 37 | 39 | 41 | 42 |
100 | 4 | 39 | 41 | 44 | 46 | 48 | 42 | 45 | 48 | 51 | 53 | 53 | 58 | 60 | 64 | 66 |
125 | 5 | 58 | 63 | 69 | 75 | 78 | 63 | 69 | 76 | 82 | 85 | 79 | 87 | 95 | 102 | 107 |
150 | 6 | 74 | 83 | 94 | 103 | 107 | 79 | 91 | 103 | 113 | 118 | 98 | 114 | 129 | 141 | 148 |
200 | 8 | 134 | 152 | 170 | 188 | 197 | 147 | 167 | 186 | 206 | 216 | 184 | 208 | 233 | 258 | 271 |
250 | 10 | 213 | 230 | 259 | 288 | 298 | 221 | 253 | 285 | 316 | 332 | 277 | 316 | 356 | 396 | 415 |
300 | 12 | 305 | 351 | 398 | 444 | 467 | 336 | 386 | 437 | 488 | 514 | 419 | 483 | 547 | 610 | 642 |
350 | 14 | 431 | 509 | 586 | 663 | - | 475 | 559 | 644 | 729 | - | 593 | 699 | 805 | 911 | - |
400 | 16 | 524 | 658 | 791 | 925 | - | 576 | 723 | 870 | 1017 | - | 720 | 904 | 1088 | 1271 | - |
450 | 18 | 606 | 812 | 1017 | 1223 | - | 667 | 893 | 1119 | 1345 | - | 833 | 1116 | 1398 | 1681 | - |
500 | 20 | 791 | 1058 | 1325 | 1592 | - | 870 | 1164 | 1458 | 1752 | - | 1088 | 1455 | 1822 | 2189 | - |
PRESSURE RATINGS*
For bi-directional bubble-tight shut off, disc in closed position:
mm | ins | Bar | Psig |
50-300 | 2-12 | 12 | 175 |
350-500 | 14-20 | 10 | 150 |
DIN 3230 BO
flanged
mm | ins | Bar | Psig |
50-300 | 2-12 | 10 | 150 |
VELOCITY LIMITS
For On/Off Services:
Fluids – 9m/s
Gases – 54m/s
Cv VALUES–VALVE SIZING COEFFICIENT
Valve size | Disc Position (degrees) | |||||||||
mm | ins | 90° | 80° | 70° | 60° | 50° | 40° | 30° | 20° | 10° |
50 | 2 | 124 | 98 | 72 | 53 | 37 | 23 | 14 | 6 | 9 |
65 | 2? | 243 | 192 | 140 | 92 | 58 | 37 | 21 | 10 | 1.3 |
80 | 3 | 397 | 813 | 230 | 132 | 83 | 53 | 30 | 13 | 1.7 |
100 | 4 | 723 | 603 | 427 | 236 | 147 | 94 | 53 | 23 | 2.6 |
125 | 5 | 1083 | 986 | 667 | 368 | 231 | 146 | 84 | 37 | 4.3 |
150 | 6 | 1591 | 1326 | 882 | 488 | 304 | 194 | 111 | 48 | 5.2 |
200 | 8 | 2852 | 2444 | 1601 | 876 | 585 | 362 | 207 | 88 | 10.3 |
250 | 10 | 4670 | 3892 | 2535 | 1471 | 925 | 574 | 329 | 139 | 16.3 |
300 | 12 | 6946 | 5789 | 3778 | 2204 | 1371 | 864 | 477 | 202 | 23.2 |
350 | 14 | 9063 | 7632 | 5108 | 2910 | 1848 | 1135 | 650 | 257 | 29.2 |
400 | 16 | 12044 | 10115 | 6766 | 3855 | 2448 | 1504 | 861 | 341 | 38.7 |
450 | 18 | 14804 | 12467 | 8656 | 4933 | 3133 | 1924 | 1102 | 436 | 49.9 |
500 | 20 | 19212 | 16178 | 10780 | 6144 | 3901 | 2326 | 1372 | 544 | 61.9 |
Cv is defined as the volume of water in U.S.G.P.M. that will flow through a given restriction or valve opening with a pressure drop of one (1) p.s.i. at room temperature. Recommended control angles are between 25°–70° open. Preferred angle for control valve sizing is 60°–65° open.
COMPONENTS | Description | Код материала | |
1 | Body | GG25 Cast Iron | 0.6025 |
2 | Seat | EPDM | EPDM |
3 | Disc | GGG40 Ductile Iron | 0.7040 |
4 | Stem | CrNiMo-Steel | 1.4401 |
5 | Stem Seal | Усиленная Buna- N | NBR |
6 | Stem Bushing | Полиацеталь | POM |
7 | Stem Retainer | CrNiMo-Steel | — |
8 | Thrust Washer | Оцинкованная пружинная | — |
ASSEMBLY
Position the disc in the partially open position, maintaining the disc within the body face-toface. Place the body between the flanges and install flange bolts. Do not use flange gaskets. Before tightening flange bolts, carefully open the disc to the full open position to ensure proper alignment and clearance of the disc O.D. with the adjacent pipe I.D. Leave disc in the full open position and tighten flange bolts per required specification. Once bolts are tightened, carefully rotate disc to closed position to ensure disc O.D. clearance.
Technical Information*
- 1-1-bray-booklet-internetIN-S30.1 08.pdfДисковые затворы и шаровые краны, каталог с чертежами RUS2.6 M
- 1-2-B-1050-EL-Resil-2010-04S-30ENG.2 08.pdfДисковые затворы поворотные Bray, буклет ENG3.9 M
- 1-1-12a-0010-S30-Parts-List-and-Dimensions-Metric-Butterfly-Valve-Sizes-50mm-300mm 02.pdfКаталог запчастей и размеры (метрические), дисковый затвор Bray Серии 30,Ду 50-300мм ENG167 K
- 1-2-12a-0013-S30-Parts-List-and-Dimensions-Metric-ButterflyS-30-350-500 02.pdfКаталог запчастей и размеры (метрические), дисковый затвор Bray Серии 30,Ду 350-500мм ENG119 K
- 1-3-12a-0254-S30-Dimensions-Metric-Butterfly-Valve-Sizes-50mm-300mm-with-Series01-Handle-Kit 02.pdfКаталог запчастей и размеры (метрические), дисковый затвор Bray Серии 30,Ду 50-300мм c рукояткой (серия 01) ENG152 K
- 1-4-12a-0014-S31-Parts-List-and-Dimensions-Metric-Butterfly-Valve-Sizes-50-300 02.pdfКаталог запчастей и размеры (метрические), дисковый затвор Bray Серии 31,Ду 50-300мм ENG297 K
- 1-5-12a-0015-S31-Parts-List-and-Dimensions-Metric-Butterfly-Valve-Sizes-350-500 02.pdfКаталог запчастей и размеры (метрические), дисковый затвор Bray Серии 31,Ду 350-500мм ENG264 K
- 1-6-12a-0256-S31-Dimensions-Metric-Butterfly-Valve-Sizes-50-300-with-S01-Handle-Kit 02.pdfКаталог запчастей и размеры (метрические), дисковый затвор Bray Серии 31,Ду 50-300мм с рукояткой (серия 01) ENG239 K
- 1-7-12a-0379-S31-Parts-List-and-Dimensions-Metric-Butterfly-Valve-with-S11-Tee-Assembly-and-S90-91-Pneumatic-Actuator 02.pdfКаталог запчастей и размеры (метрические), дисковый затвор Bray Серии 31,270 K