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Bailey Birkett 716 Range

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Bailey Birkett 716 Bronze Safety Relief Valve
A high capacity, full lift valve suitable for steam, water, liquids & gases.

 

The Bailey Birkett range of 716 Safety Relief Valves provide protection against over pressuring on Boilers, Compressors, Pressure Vessels, Process Pipelines and Pressurised equipment.

The safety valve is produced with top guided construction and an unobstructed seat bore giving full protection as well as a maximum discharge capacity.

All Bailey Birkett 716 Safety 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
  • PED Certified Cat IV
  • Set, tested and certified prior to despatch
  • Full bore for maximum capacity
  • Material & Connection options to suit a wide range of applications
  • Quality & reliable product
  • Pressure & Temperature
  • Pressure Range :
    0.35 up to 32 Bar
    Dependent on duty & size, see table below
  • Body Temperature Range :
    Bronze -29°C to 220°C
    Stainless Steel -29°C to 260°C
    See table below for disc temperature ranges
SizeDN15DN20DN25DN32DN40DN50
A ½ ¾ 1 1 ¼ 1 ½ 2
B ¾ 1 ¼ 1 ½ 2 2 ½ 3
C - 265 284 365 418 464
C1 - 241 261 332 379 422
D** 178 (192.5) 232 (252) 258 (280) 328 (351) 380 (405.5) 424 (456.5)
D** 158 (173) 209 (229) 235 (257) 295 (318.5) 340 (366.5) 382 (414.5)
E 40 55 60 70 81 96
F - 75 75 95 105 120
G** 40 (58) 44 (63) 48 (70) 58 (80) 67 (91) 80 (110)
Orifice (mm2) 109 314 415 660 1075 1662
Weight Kg** 1 1.6 (2.5) 2.1 (3.2) 4 (5.7) 7 (9) 10 (12.5)

** Figures in brackets for male x female version (special order only)*** Figures in brackets for flanged version

 St. St. BodyBronze Body
 MinAll MediaSteam & Hot WaterGas & Liquids
DN15 0.35 12.5 32 22
DN20 0.35 12.5 24.5 22
DN25 0.35 12.5 20.5 20
DN32 0.35 12.5 18 18
DN40 0.35 12.5 18 18
DN50 0.35 12.5 18 19

Maximum Back Pressure
(Total % must not exceed bar shown)

BarConstantBuilt UpVariable
5.5 80% 10% 0%

Disc Options

MaterialTemp. RangeApplication*
EPDM -29C to 150C Water
Aflas -29C to 200C Air, Gases & Steam
St. St. -29C to 260C Steam & Process Liquids

Performance

MediaKdrOver PressureBlowdown
Steam 0.7 5% 15% or 0.3 Bar min
Hot Water (>100°C) 0.7 5% 15% or 0.3 Bar min
Air/Gases 0.7 10% 10% or 0.3 Bar min
Liquid 0.46 10% 20% or 0.6 Bar min

 

Bronze Body Configurations

BSP Inlet Female x Outlet Female
CodeDiscSeatTop
ESD EPDM Bronze Dome
VSD Aflas Bronze Dome
SSD St. St. St. St. Dome
ESL EPDM Bronze Lever
VSL Aflas Bronze Lever
SSL St. St. St. St. Lever
BSP Inlet Male x Outlet Female
CodeDiscSeatTop
EMD EPDM Bronze Dome
VMD Aflas Bronze Dome
SMD St. St. St. St. Dome
EML Epdm Bronze Lever
VML Aflas Bronze Lever
SML St. St. St. St. Lever
PN16/40 Flanged Inlet x BSP F-Outlet
CodeDiscSeatTop
EFD EPDM Bronze Dome
VFD Aflas Bronze Dome
SFD St. St. St. St. Dome
EFL EPDM Bronze Lever
VFL Aflas Bronze Lever
SFL St. St. St. St. Lever

Bronze Body Configurations

BSP Inlet Female x Outlet Female
CodeDiscSeatTop
BSD Aflas St. St. Dome
ASD St. St. St. St. Dome
BSP Inlet Male x Outlet Female
CodeDiscSeatTop
DMD Aflas St. St. Dome
AMD St. St. St. St. Dome
PN16/40 Flanged Inlet x BSP F-Outlet
CodeDiscSeatTop
BFD Aflas St. St. Dome
AFD St. St. St. St, Dome

* Dependent on materials, please check compatibility

Capacity Charts/Sizing
Maximum pressure per size based on Bronze valves (Max. pressure for Stainless Steel valves is 12.5 Bar)

Air Capacity
(l/s) @ 0.3 Bar or 10% overpressure* and 15°C BS6759 Part 2

Set Pressure (Bar) DN15 DN20 DN25 DN32 DN40 DN50
0.35 18.3 52.6 69.6 111 180 279
1.0 31.2 89.9 119 189 308 476
2.0 48.8 140 186 295 481 744
3.0 63.5 183 242 384 626 968
4.0 79.7 230 303 482 786 1215
5.0 95.9 276 365 580 945 1462
6.0 112 323 427 678 1105 1708
7.0 128 369 488 776 1265 1955
8.0 144 416 550 874 1424 2202
9.0 161 463 611 972 1584 2449
10.0 177 509 673 1070 1744 2696
12.0 209 603 796 1267 2063 3189
12.5 217 626 827 1316 2143 3313
14.0 242 696 920 1463 2382 3683
16.0 274 789 1043 1659 2701 4177
18.0 306 882 1166 1855 3021 4670
20.0 339 976 1289  
22.0 371 1069  
24.0 403 1162  
26.0 436  
28.0 468  
30.0 501  
32.0 533  

*Minimum overpressure = 0.7 Bar at set pressure less the 1.0 Bar

Other Gases
If you wish to use the valve on other compatible gases the sizing details above can be used. The valve capacity will however change depending on the specific gravity of the flowing gas. Multiply the valve air capacity by 1/ SG to give the gas capacity.
SG = Specific Gravity (relative to air = 1)

Useful Conversions
Nm³/h = 1/sec x 3.60
SCFM = 1/sec x 2.12

Water Capacity
(l/s) @ 10% overpressure* and 20°C BS6759 Part 3

Set Pressure (Bar) DN15 DN20 DN25 DN32 DN40 DN50
0.35 27.6 79.4 105 167 272 420
1.0 44.6 129 170 270 440 680
2.0 63.1 182 240 382 622 962
3.0 77.3 223 294 468 762 1178
4.0 89.3 257 340 540 880 1361
5.0 99.8 287 380 604 984 1521
6.0 109 315 416 662 1078 1667
7.0 118 340 449 715 1164 1800
8.0 126 364 481 764 1245 1924
9.0 134 386 510 811 1320 2041
10.0 141 406 537 854 1392 2152
12.0 155 445 589 936 1525 2357
12.5 158 454 601 955 1556 2406
14.0 167 481 636 1011 1647 2546
16.0 179 514 680 1081 1760 2722
18.0 189 545 721 1146 1867 2887
20.0 200 575 760  
22.0 209 603  
24.0 219 639  
26.0 227  
28.0 236  
30.0 244  
32.0 252  

*Minimum overpressure = 0.7 Bar at set pressure less the 0.7 Bar

Other Gases
If you wish to use the valve on other compatible gases the sizing details above can be used. The valve capacity will however change depending on the specific gravity of the flowing gas. Multiply the valve air capacity by 1/ √SG to give the gas capacity.
SG = Specific Gravity (relative to air = 1)

Useful Conversions
lgpm = 1/min x 0.22
m³ /min = 1/min x 0.001

Saturated Steam Capacity (kg/h)
BS6759 Part 1 @ 5% Overpressure

Set Pressure (Bar) DN15 DN20 DN25 DN32 DN40 DN50
0.35 35.6 103 136 216 351 543
1.0 70.5 203 269 427 696 1075
2.0 125 359 475 755 1230 1902
3.0 167 480 635 1010 1645 2543
4.0 209 602 795 1265 2060 3185
5.0 251 723 955 1519 2475 3826
6.0 293 844 1115 1774 2889 4467
7.0 335 965 1276 2029 3304 5108
8.0 377 1086 1436 2283 3719 5750
9.0 419 1207 1596 2538 4134 6391
10.0 461 1329 1756 2793 4549 7032
12.0 545 1571 2076 3302 5378 8315
12.5 566 1632 2156 3429 5586 8636
14.0 629 1831 2397 3811 6208 9598
16.0 714 2056 2717 4321 7038 10880
18.0 798 2298 3037 4830 7867 12163
20.0 882 2540 3357  
22.0 966 2783  

*Minimum overpressure = 0.7 Bar at set pressure less the 1.0 Bar

Other Temperatures
For steam systems operating at higher temperatures the above capacities will need to e de-rated by using the super heat correction factor table below.

Useful Conversions
lbs/h = kg/h x 2.2046

Superheat Steam Correction Table

Set Pressure Saturated Steam Total Steam Temperature in °C
150 200 260 310 370 430
1.0 120 1.00 0.98 0.93 0.88 0.84 0.80
4.0 150 1.00 0.99 0.93 0.88 0.84 0.81
7.0 170 1.00 0.99 0.94 0.89 0.84 0.81
10.0 184 1.00 0.99 0.94 0.89 0.85 0.81
14.0 198 1.00 0.99 0.95 0.89 0.85 0.81
18.0 210 - 1.00 0.95 0.90 0.85 0.81
24.0 220 - 1.00 0.96 0.90 0.86 0.82

Hot Water Capacity (kW)
@ 5% Overpressure*
Pressurised (un-vented) Systems
BS6759 Part 1

Set Pressure (Bar) DN15 DN20 DN25 DN32 DN40 DN50
0.35 54.5 157 208 330 538 832
1.0 61.9 178 236 374 611 944
2.0 78.2 225 298 473 771 1192
3.0 105 301 398 633 1031 1594
4.0 131 377 498 792 1291 1996
5.0 157 453 599 952 1551 2398
6.0 184 529 699 1112 1811 2799
7.0 210 605 799 1271 2071 3201
8.0 236 681 900 1431 2331 3603
9.0 263 757 1000 1590 2591 4005
10.0 289 833 1100 1750 2851 4407
12.0 342 984 1301 2069 3370 5211
12.5 355 1022 1351 2149 3500 5412
14.0 394 1136 1501 2388 3890 6015
16.0 447 1288 1703 2708 4410 6818
18.0 500 1440 1903 3027 4930 7622
20.0 553 1592 2104  
22.0 605 1744  

* Minimum overpressure = 0.7 Bar at set pressure less the 1 Bar

Note
Pressurised (un-vented) hot water systems have the entire discharge capacity handled solely by the valve

Open vented systems take into account the discharge capacities of the vent. Hence the equivalent discharge of the valve/system is considered to be double the above chart capacities.

 

 

11 Products

3/4" Fig 716-VSL Safety Valve

Excl. VAT: £199.64

Incl. VAT: £239.57

3/4" Fig 716-ESL Safety Valve

Excl. VAT: £199.64

Incl. VAT: £239.57

3/4" Fig 716-SSL Safety Valve

Excl. VAT: £225.68

Incl. VAT: £270.82

1" Fig 716-VSL Safety Valve

Excl. VAT: £272.80

Incl. VAT: £327.36

1" Fig 716-SSL Safety Valve

Excl. VAT: £305.04

Incl. VAT: £366.05

1 1/4" Fig 716-ESL Safety Valve

Excl. VAT: £358.36

Incl. VAT: £430.03

1 1/4" Fig 716-VSL Safety Valve

Excl. VAT: £358.36

Incl. VAT: £430.03

1 1/4" Fig 716-SSL Safety Valve

Excl. VAT: £379.44

Incl. VAT: £455.33

1 1/2" Fig 716-VSL Safety Valve

Excl. VAT: £442.68

Incl. VAT: £531.22

1 1/2" 716-SSL Safety Valve

Excl. VAT: £562.96

Incl. VAT: £675.55

2" Fig 716-SSL Safety Valve

Excl. VAT: £735.32

Incl. VAT: £882.38

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