Bailey Technical Catalogue - Safety Systems UK Ltd

AIR CAPACITY CHART (l/s) @ 0.3 Barg or 10% overpressure* and 15°CSetPressure(Barg)Valve Type 707BS EN ISO 4126 Pt 1 (BS6759 Pt 1:2:3)Valve Type 716(BS6759 Pt2)DN15 DN20 DN25 DN32 DN40 DN50 DN15 DN20 DN25 DN32 DN40 DN500.35 3.93 11.4 15.0 24.7 38.7 60.6 18.3 52.6 69.6 111 180 2791.0 8.28 23.9 31.6 52.0 81.5 128 31.2 89.9 119 189 308 4762.0 13.6 39.1 51.7 85.0 133 209 48.8 140 186 295 481 7443.0 18.3 52.8 69.8 115 180 282 63.5 183 242 384 626 9684.0 22.9 66.3 87.6 144 226 354 79.7 230 303 482 786 12155.0 27.6 79.7 105 173 272 426 95.9 276 365 580 945 14626.0 32.3 93.2 123 203 317 497 112 323 427 678 1105 17087.0 36.9 107 141 232 363 569 128 369 488 776 1265 19558.0 41.6 120 159 261 409 641 144 416 550 874 1424 22029.0 46.2 134 177 290 455 713 161 463 611 972 1584 244910.0 50.9 147 194 320 501 785 177 509 673 1070 1744 269612.0 60.2 174 230 378 593 929 209 603 796 1267 2063 318912.5 66.6 181 239 393 616 965 217 626 827 1316 2143 331314.0 69.5 201 265 437 684 1072 242 696 920 1463 2382 368316.0 78.9 228 301 495 776 1216 274 789 1043 1659 2701 417718.0 88.2 255 337 554 868 1360 306 882 1166 1855 3021 467020.0 97.5 282 372 612 960 1504 339 976 128922.0 107 309 408 671 1051 1647 371 106924.0 116 336 443 729 1143 1791 403 116226.0 436Maximum pressure per sizebased on 716 bronze valve.28.0 468716 C1 and SS maximum30.0 501pressure 12.5 Barg.32.0 533* Minimum overpressure = 0.07 Barg at set pressure less than 1.0 Barg.Other GasesIf you wish to use the valve on other compatiblegases, the sizing details above can be used. Thevalve capacity will however change depending onthe specific gravity of the flowing gas. Multiply thevalve air capacity by 1/ SG to give the gas capacity.SG = specific gravity (relative to air = 1).Useful ConversionsNm 3 /h = 1/sec x 3.60SCFM = 1/sec x 2.12716H (ASME VIII)Air Capacity @ 10% Overpressure & 15ºCNo.6 No.7Set Pressure Orifice OrificeBarg I/s I/s1 – 3710 – 21020 – 40330 – 59540 _ 78750 _ 98051 407 99960 478 –80 635 –100 791 –102 807 –60