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Bailey Birkett 707 Range
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Bailey Birkett 707 Bronze Safety Relief Valve
A medium capacity, high light valve suitable for Steam, Water, Liquids, Air & Gases
The Bailey Birkett range of 707 Safety Relief Valves provide the user with protection against over pressurisation on boilers, compressors, pressure vessels, process pipelines and pressurised equipment.
The Safety Relief Valve is manufactured with a top guided construction and an unobstructed seat bore that enables full protection and a high lift capacity.
All Bailey Birkett 707 Safety Relief Valves are set to your required pressure settings as well as being issued with a fully traceable test certificate prior to despatch.
- Features
- BS6759 Part 1, 2 & 3
- BS EN ISO 4126 Part 1 (SAFED)
- WRAS approved (EPDM trim only)
- Set, tested and certified prior to despatch
- BSP, NPT or flanged connections
- Quality & reliable product
- Pressure & Temperature
- Pressure Range :
0.30 up to 24 Bar - Body Temperature Range :
-20°C to 224°C
| Size | DN15 | DN20 | DN25 | DN32 | DN40 | DN50 |
|---|---|---|---|---|---|---|
| C** | n/a (152) | 187 (181) | 202 (208) | 239 (237) | 276 (277) | 333 (333) |
| C1** | n/a (130) | 164 (159) | 179 (185) | 206 (205) | 243 (245) | 298 (298) |
| D | 133 | 162 | 186 | 215 | 249 | 303 |
| D1 | 111 | 140 | 163 | 183 | 216 | 268 |
| E | 29 | 37 | 40 | 48 | 56 | 71 |
| F** | n/a (59) | 70 (65) | 71 (78) | 90 (89) | 94 (95) | 110 (109) |
| G | 40 | 46 | 56 | 67 | 67 | 79 |
| Orifice (mm2) | 126 | 364 | 481 | 791 | 1240 | 1943 |
| Weight Kg | 0.6 (0.5) | 1 (1.6) | 1.5 (2) | 3 (3.5) | 4.5 (5) | 6 (7) |
** Figures in brackets for male x female screwed version
EPDM-20°C to 95°CWater
| Disc Material Options | Temperature Range | Application |
|---|---|---|
| Aflas | -20°C to 200°C | Air, Gases & Steam |
| St. St. | -20°C to 224°C | Steam & Process Liquids |
| Materials | |
|---|---|
| Body & Seat | Bronze |
| Disc Assembly | EPDM, Aflas or Stainless Steel |
| Spindle, Spring Cap & Ball | Stainless Steel |
| Spring | Chrome Alloy |
| Adjusting Screw & Locking Ring | Bronze |
| Dome & Lever | Bronze |
| Padlock | Brass |
| Bush | PTFE |
| Pinning Screw | Steel |
| Media | Kdr | Over Pressure | Blowdown |
|---|---|---|---|
| Steam | 0.173 | 10% | 15% or 0.3 Bar min |
| Hot Water (>100°C) | 0.173 | 10% | 15% or 0.3 Bar min |
| Air/Gases | 0.173 | 10% | 15% or 0.3 Bar min |
| Liquid | 0.149 | 10% | 20% 0.6 Bar min |
Air Capacity @0.3 Bar or 10% overpressure and 15°C
BS EN ISO 4126 Part 1 (BS6759 Part 1, 2 & 3)
| Set Pressure (Bar) | DN15 | DN20 | DN25 | DN32 | DN40 | DN50 |
|---|---|---|---|---|---|---|
| 0.35 | 3.93 | 11.4 | 15.0 | 24.7 | 38.7 | 60.6 |
| 1.0 | 8.28 | 23.9 | 31.6 | 52.0 | 81.5 | 128 |
| 2.0 | 13.6 | 39.1 | 51.7 | 85.0 | 133 | 209 |
| 3.0 | 18.3 | 52.8 | 69.8 | 115 | 180 | 282 |
| 4.0 | 22.9 | 66.3 | 87.6 | 144 | 226 | 354 |
| 5.0 | 27.6 | 79.7 | 105 | 173 | 272 | 426 |
| 6.0 | 32.3 | 93.2 | 123 | 203 | 317 | 497 |
| 7.0 | 36.9 | 107 | 141 | 232 | 363 | 569 |
| 8.0 | 41.6 | 120 | 159 | 261 | 409 | 641 |
| 9.0 | 46.2 | 134 | 177 | 290 | 455 | 713 |
| 10.0 | 50.9 | 147 | 194 | 320 | 501 | 785 |
| 12.0 | 60.2 | 174 | 230 | 378 | 593 | 929 |
| 12.5 | 66.6 | 181 | 239 | 393 | 616 | 965 |
| 14.0 | 69.5 | 201 | 265 | 437 | 684 | 1072 |
| 16.0 | 78.9 | 228 | 301 | 495 | 776 | 1216 |
| 18.0 | 88.2 | 255 | 337 | 554 | 868 | 1360 |
| 20.0 | 97.5 | 282 | 372 | 612 | 960 | 1504 |
| 22.0 | 107 | 309 | 408 | 671 | 1051 | 1647 |
| 24.0 | 116 | 336 | 443 | 729 | 1143 | 1791 |
Saturated Steam Capacity (kg/h) @ 10% Overpressure
BS EN ISO 4126 Part 1 (BS6759 Part 1, 2 & 3)
| Set Pressure (Bar) | DN15 | DN20 | DN25 | DN32 | DN40 | DN50 |
|---|---|---|---|---|---|---|
| 0.35 | 9.68 | 28.0 | 37.0 | 60.8 | 95.3 | 149 |
| 1.0 | 22.6 | 65.2 | 86.2 | 142 | 222 | 348 |
| 2.0 | 35.9 | 104 | 137 | 225 | 353 | 553 |
| 3.0 | 47.8 | 138 | 182 | 300 | 470 | 737 |
| 4.0 | 59.3 | 171 | 226 | 372 | 583 | 914 |
| 5.0 | 76.6 | 221 | 292 | 481 | 753 | 1181 |
| 6.0 | 89.0 | 257 | 340 | 559 | 876 | 1372 |
| 7.0 | 99.9 | 289 | 381 | 627 | 983 | 1540 |
| 8.0 | 112 | 324 | 428 | 705 | 1104 | 1731 |
| 9.0 | 123 | 355 | 469 | 771 | 1208 | 1893 |
| 10.0 | 135 | 390 | 515 | 848 | 1329 | 2082 |
| 12.0 | 157 | 454 | 600 | 987 | 1548 | 2425 |
| 12.5 | 167 | 482 | 637 | 1048 | 1642 | 2573 |
| 14.0 | 182 | 524 | 693 | 1140 | 1787 | 2799 |
| 16.0 | 201 | 606 | 801 | 1318 | 2066 | 3237 |
| 18.0 | 243 | 702 | 928 | 1527 | 2393 | 3750 |
| 20.0 | 256 | 739 | 977 | 1606 | 2518 | 3946 |
| 22.0 | 284 | 822 | 1086 | 1786 | 2799 | 4386 |
| 24.0 | 308 | 889 | 1174 | 1931 | 3027 | 4743 |
Water Capacity (#min) @ 10% overpressure and 20°C
BS6759 Part 3
| Set Pressure (Bar) | DN15 | DN20 | DN25 | DN32 | DN40 | DN50 |
|---|---|---|---|---|---|---|
| 0.35 | 10.3 | 29.8 | 39.4 | 64.8 | 102 | 159 |
| 1.0 | 16.7 | 48.3 | 63.8 | 105 | 164 | 258 |
| 2.0 | 23.6 | 68.3 | 90.2 | 148 | 233 | 364 |
| 3.0 | 28.9 | 83.6 | 110 | 182 | 285 | 446 |
| 4.0 | 33.4 | 96.5 | 128 | 210 | 329 | 515 |
| 5.0 | 37.4 | 108 | 143 | 235 | 368 | 576 |
| 6.0 | 40.9 | 118 | 156 | 257 | 403 | 631 |
| 7.0 | 44.2 | 128 | 169 | 278 | 435 | 682 |
| 8.0 | 47.3 | 137 | 180 | 297 | 465 | 729 |
| 9.0 | 50.1 | 145 | 191 | 315 | 493 | 773 |
| 10.0 | 52.8 | 153 | 202 | 332 | 520 | 815 |
| 12.0 | 57.9 | 167 | 221 | 363 | 570 | 893 |
| 12.5 | 59.1 | 171 | 226 | 371 | 581 | 911 |
| 14.0 | 62.5 | 181 | 239 | 392 | 615 | 964 |
| 16.0 | 66.8 | 193 | 255 | 420 | 658 | 1031 |
| 18.0 | 70.9 | 205 | 271 | 445 | 698 | 1093 |
| 20.0 | 74.7 | 216 | 285 | 469 | 735 | 1152 |
| 22.0 | 78.4 | 226 | 299 | 492 | 771 | 1208 |
| 24.0 | 81.9 | 236 | 312 | 514 | 806 | 1262 |
Hot Water Capacity (kW) @ 10% overpressure*
(Un-vented system) BS6759 Part 1
| Set Pressure (Bar) | DN15 | DN20 | DN25 | DN32 | DN40 | DN50 |
|---|---|---|---|---|---|---|
| 0.35 | 6.88 | 19.9 | 26.3 | 43.2 | 67.7 | 106 |
| 1.0 | 14.0 | 40.5 | 53.5 | 88.0 | 138 | 216 |
| 2.0 | 22.9 | 66.3 | 87.5 | 144 | 226 | 354 |
| 3.0 | 30.9 | 89.4 | 118 | 194 | 304 | 477 |
| 4.0 | 38.8 | 112 | 148 | 244 | 382 | 599 |
| 5.0 | 46.7 | 135 | 178 | 293 | 460 | 720 |
| 6.0 | 54.6 | 158 | 208 | 343 | 537 | 842 |
| 7.0 | 62.5 | 181 | 239 | 392 | 615 | 964 |
| 8.0 | 70.4 | 203 | 269 | 442 | 693 | 1085 |
| 9.0 | 78.3 | 226 | 299 | 491 | 770 | 1207 |
| 10.0 | 86.2 | 249 | 329 | 541 | 848 | 1329 |
| 12.0 | 102 | 294 | 389 | 640 | 1003 | 1572 |
| 12.5 | 106 | 306 | 404 | 665 | 1042 | 1633 |
| 14.0 | 118 | 340 | 449 | 739 | 1158 | 1815 |
| 16.0 | 133 | 386 | 510 | 838 | 1314 | 2059 |
| 18.0 | 149 | 431 | 570 | 937 | 1469 | 2302 |
| 20.0 | 165 | 477 | 630 | 1036 | 1624 | 2545 |
| 22.0 | 181 | 522 | 690 | 1135 | 1780 | 2788 |
| 24.0 | 197 | 568 | 751 | 1234 | 1935 | 3032 |
