The Cryogenic Extended‑Stem Forged‑Steel Flanged Ball Valve is a high‑performance ball valve designed for low‑temperature and cryogenic service. Constructed with a forged‑steel body, flanged‑end connection and extended‑stem assembly, it is mainly used for transportation and reliable shut‑off of LNG, liquid nitrogen, liquid oxygen, liquid argon and other cryogenic fluids.
Manufactured from forged steel, the valve body delivers excellent mechanical strength, pressure‑bearing capacity and cryogenic adaptability. The extended‑stem design keeps the stem stuffing box and operating actuator at a safe distance from cryogenic media, reducing the direct impact of low temperature on packing and operating components, while facilitating the formation of a stable cold‑isolation zone.
Working Principle of Cryogenic Forged‑Steel Ball Valve：
Opening Process: A handwheel, worm‑gear or actuator drives the extended stem into rotation. The stem turns the ball by 90°, aligning the through‑hole of the ball with the pipeline passage. The valve reaches the fully‑open position and cryogenic media flows through smoothly. The cold‑retaining extended stem isolates cold transfer so that the operating parts are free from low‑temperature influence.
Closing Process: Rotate the operating mechanism in the reverse direction, and the ball rotates back 90°. The solid section of the ball blocks the flow passage. The seat presses tightly against the ball to form a reliable bidirectional seal and shut off the flow of cryogenic media. The extended stem only transmits rotational torque and does not change the 90‑degree rotary opening‑closing principle of the ball valve.
Manual ball valves are widely used on piping systems for fast opening and closing, to cut off or connect fluid media stably. Accurate parameter confirmation including working temperature, medium, pressure and caliber is required before ordering for correct valve selection. Customized solutions on valve size, pressure rating, connection standard and body material are available to meet diverse non-standard working conditions.（Unit: mm）
| DN | NPS | Type/Class | Part No | L | D | K | C | d1 | f | P | E | F | d | w | X | y | Z |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 50 | 2 | ZYDDQ47-150LB | ZYDDQ47150XLX2 | 178 | 150 | 120.7 | 17.5 | 91.9 | 1.5 | 82.55 | 6.35 | 8.74 | / | / | / | / | / |
| 65 | 2.5 | ZYDDQ47-150LB | ZYDDQ47150XLX2.5 | 190 | 180 | 139.7 | 20.7 | 104.6 | 1.5 | 101.6 | 6.35 | 8.74 | / | / | / | / | / |
| 80 | 3 | ZYDDQ47-150LB | ZYDDQ47150XLX3 | 203 | 190 | 152.4 | 22.3 | 127 | 1.5 | 114.3 | 6.35 | 8.74 | / | / | / | / | / |
| 100 | 4 | ZYDDQ47-150LB | ZYDDQ47150XLX4 | 229 | 230 | 190.5 | 22.3 | 157.2 | 1.5 | 149.23 | 6.35 | 8.74 | / | / | / | / | / |
| 150 | 6 | ZYDDQ47-150LB | ZYDDQ47150XLX6 | 394 | 280 | 241.3 | 23.9 | 215.9 | 1.5 | 193.68 | 6.35 | 8.74 | / | / | / | / | / |
| 200 | 8 | ZYDDQ47-150LB | ZYDDQ47150XLX8 | 457 | 345 | 298.58 | 27.0 | 269.7 | 1.5 | 247.65 | 6.35 | 8.74 | / | / | / | / | / |
| 250 | 10 | ZYDDQ47-150LB | ZYDDQ47150XLX10 | 533 | 405 | 362.0 | 28.6 | 323.8 | 1.5 | 304.8 | 6.35 | 8.74 | / | / | / | / | / |
| 300 | 12 | ZYDDQ47-150LB | ZYDDQ47150XLX12 | 610 | 485 | 431.8 | 30.2 | 381 | 1.5 | 381 | 6.35 | 8.74 | / | / | / | / | / |
| 350 | 14 | ZYDDQ47-150LB | ZYDDQ47150XLX14 | 686 | 535 | 476.2 | 33.4 | 412.8 | 1.5 | 396.88 | 6.35 | 8.74 | / | / | / | / | / |
| 400 | 16 | ZYDDQ47-150LB | ZYDDQ47150XLX16 | 762 | 595 | 539.8 | 35.0 | 469.9 | 1.5 | 454.03 | 6.35 | 8.74 | / | / | / | / | / |
| 450 | 18 | ZYDDQ47-150LB | ZYDDQ47150XLX18 | 864 | 635 | 577.9 | 38.1 | 533.4 | 1.5 | 517.53 | 6.35 | 8.74 | / | / | / | / | / |
| 500 | 20 | ZYDDQ47-150LB | ZYDDQ47150XLX20 | 914 | 700 | 635.0 | 41.3 | 584.2 | 1.5 | 558.8 | 6.35 | 8.74 | / | / | / | / | / |
| 600 | 24 | ZYDDQ47-150LB | ZYDDQ47150XLX24 | 1067 | 815 | 749.3 | 46.1 | 692.2 | 1.5 | 673.1 | 6.35 | 8.74 | / | / | / | / | / |
| 650 | 26 | ZYDDQ47-150LB | ZYDDQ47150XLX26 | 1143 | 870 | 806.4 | 66.7 | / | / | / | / | / | / | / | / | / | / |
| 700 | 28 | ZYDDQ47-150LB | ZYDDQ47150XLX28 | 1245 | 925 | 863.6 | 69.9 | / | / | / | / | / | / | / | / | / | / |
| 750 | 30 | ZYDDQ47-150LB | ZYDDQ47150XLX30 | 1295 | 985 | 914.4 | 73.1 | / | / | / | / | / | / | / | / | / | / |
| 800 | 32 | ZYDDQ47-150LB | ZYDDQ47150XLX32 | 1372 | 1060 | 977.9 | 79.4 | / | / | / | / | / | / | / | / | / | / |
| 850 | 34 | ZYDDQ47-150LB | ZYDDQ47150XLX34 | 1473 | 1110 | 1028.7 | 81.0 | / | / | / | / | / | / | / | / | / | / |
| 900 | 36 | ZYDDQ47-150LB | ZYDDQ47150XLX36 | 1524 | 1170 | 1085.8 | 88.9 | / | / | / | / | / | / | / | / | / | / |
| 1000 | 40 | ZYDDQ47-150LB | ZYDDQ47150XLX40 | 1753 | 1290 | 1200.2 | 88.9 | / | / | / | / | / | / | / | / | / | / |
| 1050 | 42 | ZYDDQ47-150LB | ZYDDQ47150XLX42 | 1855 | 1345 | 1257.3 | 95.3 | / | / | / | / | / | / | / | / | / | / |
| 1200 | 48 | ZYDDQ47-150LB | ZYDDQ47150XLX48 | 2134 | 1510 | 1422.4 | 106.4 | / | / | / | / | / | / | / | / | / | / |
| 50 | 2 | ZYDDQ47-300LB | ZYDDQ47300XLX2 | 216 | 165 | 127.0 | 20.7 | 91.9 | 1.5 | 82.55 | 7.92 | 11.91 | 103 | 73 | 92.1 | 93.7 | 71.4 |
| 65 | 2.5 | ZYDDQ47-300LB | ZYDDQ47300XLX2.5 | 241 | 190 | 149.2 | 23.9 | 104.6 | 1.5 | 101.6 | 7.92 | 11.91 | 116 | 85.7 | 104.8 | 106.4 | 84.1 |
| 80 | 3 | ZYDDQ47-300LB | ZYDDQ47300XLX3 | 282 | 210 | 168.3 | 27.0 | 127 | 1.5 | 123.83 | 7.92 | 11.91 | 138 | 108 | 127 | 128.6 | 106.4 |
| 100 | 4 | ZYDDQ47-300LB | ZYDDQ47300XLX4 | 305 | 255 | 200.0 | 30.2 | 157.2 | 1.5 | 149.23 | 7.92 | 11.91 | 168 | 131.8 | 157.2 | 158.8 | 130.2 |
| 150 | 6 | ZYDDQ47-300LB | ZYDDQ47300XLX6 | 457 | 320 | 269.9 | 35.0 | 215.9 | 1.5 | 211.12 | 7.92 | 11.91 | 227 | 190.5 | 215.9 | 217.5 | 188.9 |
| 200 | 8 | ZYDDQ47-300LB | ZYDDQ47300XLX8 | 502 | 380 | 330.2 | 39.7 | 269.7 | 1.5 | 269.88 | 7.92 | 11.91 | 281 | 238.1 | 269.9 | 271.5 | 236.5 |
| 250 | 10 | ZYDDQ47-300LB | ZYDDQ47300XLX10 | 568 | 445 | 387.4 | 46.1 | 323.8 | 1.5 | 323.85 | 7.92 | 11.91 | 335 | 285.8 | 323.8 | 325.4 | 284.2 |
| 300 | 12 | ZYDDQ47-300LB | ZYDDQ47300XLX12 | 648 | 520 | 450.8 | 49.3 | 381 | 1.5 | 381 | 7.92 | 11.91 | 392 | 342.9 | 381 | 382.6 | 341.3 |
| 350 | 14 | ZYDDQ47-300LB | ZYDDQ47300XLX14 | 762 | 585 | 514.4 | 52.4 | 412.8 | 1.5 | 419.1 | 7.92 | 11.91 | 424 | 374.6 | 412.8 | 414.3 | 373.1 |
| 400 | 16 | ZYDDQ47-300LB | ZYDDQ47300XLX16 | 838 | 650 | 571.5 | 55.6 | 469.9 | 1.5 | 469.9 | 7.92 | 11.91 | 481 | 425.4 | 469.9 | 471.5 | 423..9 |
| 450 | 18 | ZYDDQ47-300LB | ZYDDQ47300XLX18 | 914 | 710 | 628.6 | 58.8 | 533.4 | 1.5 | 533.4 | 7.92 | 11.91 | 544 | 489 | 533.4 | 535 | 487.4 |
| 500 | 20 | ZYDDQ47-300LB | ZYDDQ47300XLX20 | 991 | 775 | 685.8 | 62.0 | 584.2 | 1.5 | 584.2 | 9.53 | 13.49 | 595 | 533.4 | 584.2 | 585.8 | 531.8 |
| 600 | 24 | ZYDDQ47-300LB | ZYDDQ47300XLX24 | 1143 | 915 | 812.8 | 68.3 | 692.2 | 1.5 | 692.15 | 11.13 | 16.66 | 703 | 641.4 | 692.2 | 693.7 | 639.8 |
| 650 | 26 | ZYDDQ47-300LB | ZYDDQ47300XLX26 | 1245 | 970 | 876.3 | 77.8 | / | / | / | / | / | / | / | / | / | / |
| 700 | 28 | ZYDDQ47-300LB | ZYDDQ47300XLX28 | 1346 | 1035 | 939.8 | 84.2 | / | / | / | / | / | / | / | / | / | / |
| 750 | 30 | ZYDDQ47-300LB | ZYDDQ47300XLX30 | 1397 | 1090 | 997.0 | 90.5 | / | / | / | / | / | / | / | / | / | / |
| 800 | 32 | ZYDDQ47-300LB | ZYDDQ47300XLX32 | 1524 | 1150 | 1054.1 | 96.9 | / | / | / | / | / | / | / | / | / | / |
| 850 | 34 | ZYDDQ47-300LB | ZYDDQ47300XLX34 | 1626 | 1205 | 1104.9 | 100.1 | / | / | / | / | / | / | / | / | / | / |
| 900 | 36 | ZYDDQ47-300LB | ZYDDQ47300XLX36 | 1727 | 1270 | 1168.4 | 103.2 | / | / | / | / | / | / | / | / | / | / |
| 1000 | 40 | ZYDDQ47-300LB | ZYDDQ47300XLX40 | 1956 | 1240 | 1155.7 | 112.8 | / | / | / | / | / | / | / | / | / | / |
| 1050 | 42 | ZYDDQ47-300LB | ZYDDQ47300XLX42 | 2083 | 1290 | 1206.5 | 117.5 | / | / | / | / | / | / | / | / | / | / |
| 1200 | 48 | ZYDDQ47-300LB | ZYDDQ47300XLX48 | 2170 | 1465 | 1371.6 | 131.8 | / | / | / | / | / | / | / | / | / | / |
| 50 | 2 | ZYDDQ47-600LB | ZYDDQ47600XLX2 | 292 | 165 | 127.0 | 25.4 | 91.9 | 6.4 | 82.55 | 7.92 | 11.91 | 103 | 73 | 92.1 | 93.7 | 71.4 |
| 65 | 2.5 | ZYDDQ47-600LB | ZYDDQ47600XLX2.5 | 330 | 190 | 169.2 | 28.6 | 104.6 | 6.4 | 101.6 | 7.92 | 11.91 | 116 | 85.7 | 104.8 | 106.4 | 84.1 |
| 80 | 3 | ZYDDQ47-600LB | ZYDDQ47600XLX3 | 356 | 210 | 168.3 | 31.8 | 127 | 6.4 | 123.83 | 7.92 | 11.91 | 138 | 108 | 127 | 128.6 | 106.4 |
| 100 | 4 | ZYDDQ47-600LB | ZYDDQ47600XLX4 | 432 | 275 | 215.9 | 38.1 | 157.2 | 6.4 | 149.23 | 7.92 | 11.91 | 168 | 131.8 | 157.2 | 158.8 | 130.2 |
| 150 | 6 | ZYDDQ47-600LB | ZYDDQ47600XLX6 | 559 | 355 | 292 | 48 | 215.9 | 6.4 | 211.12 | 7.92 | 11.91 | 227 | 190.5 | 215.9 | 217.5 | 188.9 |
| 200 | 8 | ZYDDQ47-600LB | ZYDDQ47600XLX8 | 660 | 420 | 349 | 56 | 269.7 | 6.4 | 269.88 | 7.92 | 11.91 | 281 | 238.1 | 269.9 | 271.5 | 236.5 |
| 250 | 10 | ZYDDQ47-600LB | ZYDDQ47600XLX10 | 787 | 510 | 431 | 64 | 323.8 | 6.4 | 323.85 | 7.92 | 11.91 | 335 | 285.8 | 323.8 | 325.4 | 284.2 |
| 300 | 12 | ZYDDQ47-600LB | ZYDDQ47600XLX12 | 838 | 560 | 489 | 67 | 381 | 6.4 | 381 | 7.92 | 11.91 | 392 | 342.9 | 381 | 382.6 | 341.3 |
| 350 | 14 | ZYDDQ47-600LB | ZYDDQ47600XLX14 | 889 | 605 | 527 | 70 | 412.8 | 6.4 | 419.1 | 7.92 | 11.91 | 424 | 374.6 | 412.8 | 414.3 | 373.1 |
| 400 | 16 | ZYDDQ47-600LB | ZYDDQ47600XLX16 | 991 | 685 | 603 | 76 | 469.9 | 6.4 | 469.9 | 7.92 | 11.91 | 481 | 425.4 | 469.9 | 471.5 | 423..9 |
| 450 | 18 | ZYDDQ47-600LB | ZYDDQ47600XLX18 | 1092 | 745 | 654 | 83 | 533.4 | 6.4 | 533.4 | 7.92 | 11.91 | 544 | 489 | 533.4 | 535 | 487.4 |
| 500 | 20 | ZYDDQ47-600LB | ZYDDQ47600XLX20 | 1194 | 815 | 724 | 89 | 584.2 | 6.4 | 584.2 | 9.53 | 13.49 | 595 | 533.4 | 584.2 | 585.8 | 531.8 |
| 600 | 24 | ZYDDQ47-600LB | ZYDDQ47600XLX24 | 1397 | 940 | 838 | 102 | 692.2 | 6.4 | 692.15 | 11.13 | 16.66 | 703 | 641.4 | 692.2 | 693.7 | 639.8 |
| 650 | 26 | ZYDDQ47-600LB | ZYDDQ47600XLX26 | 1448 | 1015 | 914 | 108 | / | / | / | / | / | / | / | / | / | / |
| 700 | 28 | ZYDDQ47-600LB | ZYDDQ47600XLX28 | 1549 | 1075 | 965 | 111 | / | / | / | / | / | / | / | / | / | / |
| 750 | 30 | ZYDDQ47-600LB | ZYDDQ47600XLX30 | 1651 | 1130 | 1022 | 114 | / | / | / | / | / | / | / | / | / | / |
| 800 | 32 | ZYDDQ47-600LB | ZYDDQ47600XLX32 | 1778 | 1195 | 1080 | 118 | / | / | / | / | / | / | / | / | / | / |
| 850 | 34 | ZYDDQ47-600LB | ZYDDQ47600XLX34 | 1930 | 1245 | 1130 | 121 | / | / | / | / | / | / | / | / | / | / |
| 900 | 36 | ZYDDQ47-600LB | ZYDDQ47600XLX36 | 2083 | 1315 | 1194 | 124 | / | / | / | / | / | / | / | / | / | / |
| 50 | 2 | ZYDDQ47-900LB | ZYDDQ47900XLX2 | 368 | 215 | 165.1 | 38.1 | 91.9 | 6.4 | 95.25 | 7.92 | 11.91 | 103 | 73 | 92.1 | 93.7 | 71.4 |
| 65 | 2.5 | ZYDDQ47-900LB | ZYDDQ47900XLX2.5 | 419 | 245 | 190.5 | 41.3 | 104.6 | 6.4 | 107.95 | 7.92 | 11.91 | 116 | 85.7 | 104.8 | 106.4 | 84.1 |
| 80 | 3 | ZYDDQ47-900LB | ZYDDQ47900XLX3 | 381 | 240 | 190.5 | 38.1 | 127 | 6.4 | 123.83 | 7.92 | 11.91 | 138 | 108 | 127 | 128.6 | 106.4 |
| 100 | 4 | ZYDDQ47-900LB | ZYDDQ47900XLX4 | 457 | 290 | 235 | 44.5 | 157.2 | 6.4 | 149.23 | 7.92 | 11.91 | 168 | 131.8 | 157.2 | 158.8 | 130.2 |
| 150 | 6 | ZYDDQ47-900LB | ZYDDQ47900XLX6 | 610 | 380 | 317.5 | 55.6 | 215.9 | 6.4 | 211.12 | 7.92 | 11.91 | 227 | 190.5 | 215.9 | 217.5 | 188.9 |
| 200 | 8 | ZYDDQ47-900LB | ZYDDQ47900XLX8 | 737 | 470 | 393.7 | 63.5 | 269.7 | 6.4 | 269.88 | 7.92 | 11.91 | 281 | 238.1 | 269.9 | 271.5 | 236.5 |
| 250 | 10 | ZYDDQ47-900LB | ZYDDQ47900XLX10 | 838 | 545 | 469.9 | 69.9 | 323.8 | 6.4 | 323.85 | 7.92 | 11.91 | 335 | 285.8 | 323.8 | 325.4 | 284.2 |
| 300 | 12 | ZYDDQ47-900LB | ZYDDQ47900XLX12 | 965 | 610 | 533.4 | 79.4 | 381 | 6.4 | 381 | 7.92 | 11.91 | 392 | 342.9 | 381 | 382.6 | 341.3 |
| 350 | 14 | ZYDDQ47-900LB | ZYDDQ47900XLX14 | 1029 | 640 | 558.8 | 85.8 | 412.8 | 6.4 | 419.1 | 11.13 | 16.66 | 424 | 374.6 | 412.8 | 414.3 | 373.1 |
| 400 | 16 | ZYDDQ47-900LB | ZYDDQ47900XLX16 | 1130 | 705 | 616 | 88.9 | 469.9 | 6.4 | 469.9 | 11.13 | 16.66 | 481 | 425.4 | 469.9 | 471.5 | 423..9 |
| 450 | 18 | ZYDDQ47-900LB | ZYDDQ47900XLX18 | 1219 | 785 | 685.8 | 101.6 | 533.4 | 6.4 | 533.4 | 12.7 | 19.84 | 544 | 489 | 533.4 | 535 | 487.4 |
| 500 | 20 | ZYDDQ47-900LB | ZYDDQ47900XLX20 | 1321 | 855 | 749.3 | 108.0 | 584.2 | 6.4 | 584.2 | 12.7 | 19.84 | 595 | 533.4 | 584.2 | 585.8 | 531.8 |
| 600 | 24 | ZYDDQ47-900LB | ZYDDQ47900XLX24 | 1549 | 1040 | 901.7 | 139.7 | 692.2 | 6.4 | 692.15 | 15.88 | 26.97 | 703 | 641.4 | 692.2 | 693.7 | 639.8 |
| 650 | 26 | ZYDDQ47-900LB | ZYDDQ47900XLX26 | 1651 | 1085 | 952.5 | 139.7 | / | / | / | / | / | / | / | / | / | / |
| 700 | 28 | ZYDDQ47-900LB | ZYDDQ47900XLX28 | 1753 | 1170 | 1022.4 | 142.9 | / | / | / | / | / | / | / | / | / | / |
| 750 | 30 | ZYDDQ47-900LB | ZYDDQ47900XLX30 | 1880 | 1230 | 1085.9 | 149.3 | / | / | / | / | / | / | / | / | / | / |
| 800 | 32 | ZYDDQ47-900LB | ZYDDQ47900XLX32 | 2032 | 1315 | 1155.7 | 158.8 | / | / | / | / | / | / | / | / | / | / |
| 850 | 34 | ZYDDQ47-900LB | ZYDDQ47900XLX34 | 2159 | 1395 | 1225.6 | 165.1 | / | / | / | / | / | / | / | / | / | / |
| 900 | 36 | ZYDDQ47-900LB | ZYDDQ47900XLX36 | 2286 | 1460 | 1289.1 | 171.5 | / | / | / | / | / | / | / | / | / | / |
| 50 | 2 | ZYDDQ47-1500LB | ZYDDQ471500XLX2 | 368 | 215 | 165.1 | 38.1 | 91.9 | 6.4 | 95.25 | 7.92 | 11.91 | 103 | 73 | 92.1 | 93.7 | 71.4 |
| 65 | 2.5 | ZYDDQ47-1500LB | ZYDDQ471500XLX2.5 | 419 | 245 | 190.5 | 41.3 | 104.6 | 6.4 | 107.95 | 7.92 | 11.91 | 116 | 85.7 | 104.8 | 106.4 | 84.1 |
| 80 | 3 | ZYDDQ47-1500LB | ZYDDQ471500XLX3 | 470 | 265 | 203.2 | 47.7 | 127 | 6.4 | 136.53 | 7.92 | 11.91 | 138 | 108 | 127 | 128.6 | 106.4 |
| 100 | 4 | ZYDDQ47-1500LB | ZYDDQ471500XLX4 | 546 | 310 | 241.3 | 54.0 | 157.2 | 6.4 | 161.93 | 7.92 | 11.91 | 168 | 131.8 | 157.2 | 158.8 | 130.2 |
| 150 | 6 | ZYDDQ47-1500LB | ZYDDQ471500XLX6 | 705 | 395 | 317.5 | 82.6 | 215.9 | 6.4 | 211.14 | 9.53 | 13.49 | 227 | 190.5 | 215.9 | 217.5 | 188.9 |
| 200 | 8 | ZYDDQ47-1500LB | ZYDDQ471500XLX8 | 832 | 485 | 393.7 | 92.1 | 269.7 | 6.4 | 269.88 | 11.13 | 16.66 | 281 | 238.1 | 269.9 | 271.5 | 236.5 |
| 250 | 10 | ZYDDQ47-1500LB | ZYDDQ471500XLX10 | 991 | 585 | 482.6 | 108.0 | 323.8 | 6.4 | 323.85 | 11.13 | 16.66 | 335 | 285.8 | 323.8 | 325.4 | 284.2 |
| 300 | 12 | ZYDDQ47-1500LB | ZYDDQ471500XLX12 | 1130 | 675 | 571.5 | 123.9 | 381 | 6.4 | 381 | 14.27 | 23.01 | 392 | 342.9 | 381 | 382.6 | 341.3 |
| 350 | 14 | ZYDDQ47-1500LB | ZYDDQ471500XLX14 | 1257 | 750 | 635.0 | 133.4 | 412.8 | 6.4 | 419.1 | 15.88 | 26.97 | 424 | 374.6 | 412.8 | 414.3 | 373.1 |
| 400 | 16 | ZYDDQ47-1500LB | ZYDDQ471500XLX16 | 1384 | 825 | 704.8 | 146.1 | 469.9 | 6.4 | 469.9 | 17.48 | 30.18 | 481 | 425.4 | 469.9 | 471.5 | 423..9 |
| 450 | 18 | ZYDDQ47-1500LB | ZYDDQ471500XLX18 | 1537 | 915 | 774.7 | 162.0 | 533.4 | 6.4 | 533.4 | 17.48 | 30.18 | 544 | 489 | 533.4 | 535 | 487.4 |
| 500 | 20 | ZYDDQ47-1500LB | ZYDDQ471500XLX20 | 1664 | 985 | 831.8 | 177.8 | 584.2 | 6.4 | 584.2 | 17.48 | 33.32 | 595 | 533.4 | 584.2 | 585.8 | 531.8 |
| 600 | 24 | ZYDDQ47-1500LB | ZYDDQ471500XLX24 | 1943 | 1170 | 990.6 | 203.2 | 692.2 | 6.4 | 692.15 | 20.62 | 36.53 | 703 | 641.4 | 692.2 | 693.7 | 639.8 |
| 50 | 2 | ZYDDQ47-2500LB | ZYDDQ472500XLX2 | 451 | 235 | 171.4 | 50.9 | 91.9 | 6.4 | 101.6 | 7.92 | 11.91 | 103 | 73 | 92.1 | 93.7 | 71.4 |
| 65 | 2.5 | ZYDDQ47-2500LB | ZYDDQ472500XLX2.5 | 508 | 265 | 196.8 | 57.2 | 104.6 | 6.4 | 111.13 | 9.52 | 13.49 | 116 | 85.7 | 104.8 | 106.4 | 84.1 |
| 80 | 3 | ZYDDQ47-2500LB | ZYDDQ472500XLX3 | 578 | 305 | 228.6 | 66.7 | 127 | 6.4 | 127 | 9.53 | 13.49 | 138 | 108 | 127 | 128.6 | 106.4 |
| 100 | 4 | ZYDDQ47-2500LB | ZYDDQ472500XLX4 | 673 | 355 | 273.0 | 76.2 | 157.2 | 6.4 | 157.18 | 11.13 | 16.66 | 168 | 131.8 | 157.2 | 158.8 | 130.2 |
| 150 | 6 | ZYDDQ47-2500LB | ZYDDQ472500XLX6 | 914 | 485 | 358.3 | 108.0 | 215.9 | 6.4 | 228.6 | 12.7 | 19.84 | 227 | 190.5 | 215.9 | 217.5 | 188.9 |
| 200 | 8 | ZYDDQ47-2500LB | ZYDDQ472500XLX8 | 1022 | 550 | 438.2 | 127.0 | 269.7 | 6.4 | 279.4 | 14.27 | 23.01 | 281 | 238.1 | 269.9 | 271.5 | 236.5 |
| 250 | 10 | ZYDDQ47-2500LB | ZYDDQ472500XLX10 | 1270 | 675 | 539.8 | 165.1 | 323.8 | 6.4 | 342.9 | 17.48 | 30.18 | 335 | 285.8 | 323.8 | 325.4 | 284.2 |
| 300 | 12 | ZYDDQ47-2500LB | ZYDDQ472500XLX12 | 1422 | 760 | 619.1 | 184.2 | 381 | 6.4 | 406.4 | 17.48 | 33.32 | 392 | 342.9 | 381 | 382.6 | 341.3 |
Forged‑steel cryogenic ball valve adopts forged‑steel body treated by cryogenic processing for service down to ‑196℃. Equipped with a cold‑insulated extended stem to block cold conduction and prevent frosting or jamming at the operating end, it features flanged connection for easy maintenance and reliable bidirectional shut‑off. With low‑resistance straight‑through flow passage, optional soft‑seat or metal‑to‑metal sealing, fire‑safe and anti‑static design, this valve is well suited for pipelines carrying flammable‑explosive cryogenic media such as LNG.
