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Bailey Birkett 707 Range

Bailey Birkett 707 Safety Valve 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
SizeDN15DN20DN25DN32DN40DN50
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 OptionsTemperature RangeApplication
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
MediaKdrOver PressureBlowdown
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)DN15DN20DN25DN32DN40DN50
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)DN15DN20DN25DN32DN40DN50
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)DN15DN20DN25DN32DN40DN50
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)DN15DN20DN25DN32DN40DN50
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

 

 
 

19 Products

1/2" Fig 707-11MD Safety Valve

Excl. VAT: £130.20

Incl. VAT: £156.24

1/2" Fig 707-12EL Safety Valve

Excl. VAT: £135.16

Incl. VAT: £162.19

1/2" Fig 707-1EL Safety Valve

Excl. VAT: £140.12

Incl. VAT: £168.14

1/2" Fig 707-11VL Safety Valve

Excl. VAT: £142.60

Incl. VAT: £171.12

1/2" Fig 707-11VD Safety Valve

Excl. VAT: £145.08

Incl. VAT: £174.10

1/2" Fig 707-11ML Safety Valve

Excl. VAT: £153.76

Incl. VAT: £184.51

1/2" Fig 707-12ML Safety Valve

Excl. VAT: £153.76

Incl. VAT: £184.51

3/4" Fig 707-22VL Safety Valve

Excl. VAT: £155.00

Incl. VAT: £186.00

3/4" Fig 707-21VL Safety Valve

Excl. VAT: £159.96

Incl. VAT: £191.95

3/4" Fig 707-22EL Safety Valve

Excl. VAT: £168.64

Incl. VAT: £202.37

3/4" Fig 707-22ML Safety Valve

Excl. VAT: £178.56

Incl. VAT: £214.27

1" Fig 707-32ED Safety Valve

Excl. VAT: £179.80

Incl. VAT: £215.76

1" Fig 707-31ML Safety Valve

Excl. VAT: £209.56

Incl. VAT: £251.47

1" Fig 707-32VL Safety Valve

Excl. VAT: £212.04

Incl. VAT: £254.45

1 1/2" Fig 707-51ML Safety Valve

Excl. VAT: £297.60

Incl. VAT: £357.12

1 1/2" Fig 707-52VL Safety Valve

Excl. VAT: £379.44

Incl. VAT: £455.33

1 1/4" Fig 707-42VL Safety Valve

Excl. VAT: £381.92

Incl. VAT: £458.30

2" Fig 707-62ML Safety Valve

Excl. VAT: £411.68

Incl. VAT: £494.02

1 1/4" Fig 707-45ML Safety Valve

Excl. VAT: £531.96

Incl. VAT: £638.35

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