Manual Zero‑Friction Retractable Ball Valve is a high‑performance ball valve featuring a separated structure of axial‑lifting and rotation for its ball. Driven by the lever‑operated stem, the ball disengages from the seat before rotation during opening‑closing cycles, which eliminates direct friction between ball and seat as found in conventional ball valves.
This structure can effectively reduce operating torque and seat wear, and improve the valve’s service life and sealing reliability. With manual operation, the valve has a compact, simple structure and easy‑to‑operate performance. It is suitable for industrial piping systems under high‑pressure, low‑temperature, high‑temperature, abrasive‑prone and strict sealing‑requirement working conditions.
Working Principle of Manual Zero‑Friction Retractable Ball Valve
Closed Position: Under the combined action of medium pressure and mechanical pre‑load, the ball is pressed tightly against the seat to achieve bi‑directional tight sealing. It effectively blocks medium flow with stable pressure‑bearing performance and zero‑leakage.
Opening Process (Zero‑Friction Core Principle): When turning the handwheel, the spiral mechanism of the stem first drives the ball to lift axially. The sealing surface of the ball is fully disengaged from the seat and suspended inside the valve cavity. Then the ball rotates 90° for flow‑direction switching under non‑contact and friction‑free condition. No scratch on sealing surfaces or wear debris is generated throughout the opening‑closing cycle.
Sealing‑up for Closure: After rotation is completed, the stem drives the ball to descend and press firmly against the seat. Reliable sealing is re‑established to finish the switching operation.
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 | L1 | D | K | Th | n-L | C | d1 | f | P | E | F | d | w | X | y | Z |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 50 | 2 | LSQ47-150LB | LSQ47150XLX2 | 178 | 150 | 120.7 | M16 | 4-18 | 17.5 | 91.9 | 1.5 | 82.55 | 6.35 | 8.74 | |||||
| 65 | 2.5 | LSQ47-150LB | LSQ47150XLX2.5 | 190 | 180 | 139.7 | M16 | 4-18 | 20.7 | 104.6 | 1.5 | 101.6 | 6.35 | 8.74 | |||||
| 80 | 3 | LSQ47-150LB | LSQ47150XLX3 | 203 | 190 | 152.4 | M16 | 4-18 | 22.3 | 127 | 1.5 | 114.3 | 6.35 | 8.74 | |||||
| 100 | 4 | LSQ47-150LB | LSQ47150XLX4 | 229 | 230 | 190.5 | M16 | 8-18 | 22.3 | 157.2 | 1.5 | 149.23 | 6.35 | 8.74 | |||||
| 150 | 6 | LSQ47-150LB | LSQ47150XLX6 | 394 | 280 | 241.3 | M20 | 8-22 | 23.9 | 215.9 | 1.5 | 193.68 | 6.35 | 8.74 | |||||
| 200 | 8 | LSQ47-150LB | LSQ47150XLX8 | 457 | 345 | 298.58 | M20 | 8-22 | 27.0 | 269.7 | 1.5 | 247.65 | 6.35 | 8.74 | |||||
| 250 | 10 | LSQ47-150LB | LSQ47150XLX10 | 533 | 405 | 362.0 | M24 | 12-26 | 28.6 | 323.8 | 1.5 | 304.8 | 6.35 | 8.74 | |||||
| 300 | 12 | LSQ47-150LB | LSQ47150XLX12 | 610 | 485 | 431.8 | M24 | 12-26 | 30.2 | 381 | 1.5 | 381 | 6.35 | 8.74 | |||||
| 350 | 14 | LSQ47-150LB | LSQ47150XLX14 | 686 | 535 | 476.2 | M27 | 12-30 | 33.4 | 412.8 | 1.5 | 396.88 | 6.35 | 8.74 | |||||
| 400 | 16 | LSQ47-150LB | LSQ47150XLX16 | 762 | 595 | 539.8 | M27 | 16-30 | 35.0 | 469.9 | 1.5 | 454.03 | 6.35 | 8.74 | |||||
| 450 | 18 | LSQ47-150LB | LSQ47150XLX18 | 864 | 635 | 577.9 | M30 | 16-33 | 38.1 | 533.4 | 1.5 | 517.53 | 6.35 | 8.74 | |||||
| 500 | 20 | LSQ47-150LB | LSQ47150XLX20 | 914 | 700 | 635.0 | M30 | 20-33 | 41.3 | 584.2 | 1.5 | 558.8 | 6.35 | 8.74 | |||||
| 600 | 24 | LSQ47-150LB | LSQ47150XLX24 | 1067 | 815 | 749.3 | M33 | 20-36 | 46.1 | 692.2 | 1.5 | 673.1 | 6.35 | 8.74 | |||||
| 650 | 26 | LSQ47-150LB | LSQ47150XLX26 | 1143 | 870 | 806.4 | M33 | 24-36 | 66.7 | ||||||||||
| 700 | 28 | LSQ47-150LB | LSQ47150XLX28 | 1245 | 925 | 863.6 | M33 | 28-36 | 69.9 | ||||||||||
| 750 | 30 | LSQ47-150LB | LSQ47150XLX30 | 1295 | 985 | 914.4 | M33 | 28-36 | 73.1 | ||||||||||
| 800 | 32 | LSQ47-150LB | LSQ47150XLX32 | 1372 | 1060 | 977.9 | M39 | 28-42 | 79.4 | ||||||||||
| 850 | 34 | LSQ47-150LB | LSQ47150XLX34 | 1473 | 1110 | 1028.7 | M39 | 32-42 | 81.0 | ||||||||||
| 900 | 36 | LSQ47-150LB | LSQ47150XLX36 | 1524 | 1170 | 1085.8 | M39 | 32-42 | 88.9 | ||||||||||
| 1000 | 40 | LSQ47-150LB | LSQ47150XLX40 | 1753 | 1290 | 1200.2 | M39 | 36-42 | 88.9 | ||||||||||
| 1050 | 42 | LSQ47-150LB | LSQ47150XLX42 | 1855 | 1345 | 1257.3 | M39 | 36-42 | 95.3 | ||||||||||
| 1200 | 48 | LSQ47-150LB | LSQ47150XLX48 | 2134 | 1510 | 1422.4 | M39 | 44-42 | 106.4 | ||||||||||
| 50 | 2 | LSQ47-300LB | LSQ47300XLX2 | 216 | 165 | 127.0 | M16 | 8-18 | 20.7 | 91.9 | 1.5 | 82.55 | 7.92 | 11.91 | 103 | 73 | 92.1 | 93.7 | 71.4 |
| 65 | 2.5 | LSQ47-300LB | LSQ47300XLX2.5 | 241 | 190 | 149.2 | M20 | 8-22 | 23.9 | 104.6 | 1.5 | 101.6 | 7.92 | 11.91 | 116 | 85.7 | 104.8 | 106.4 | 84.1 |
| 80 | 3 | LSQ47-300LB | LSQ47300XLX3 | 282 | 210 | 168.3 | M20 | 8-22 | 27.0 | 127 | 1.5 | 123.83 | 7.92 | 11.91 | 138 | 108 | 127 | 128.6 | 106.4 |
| 100 | 4 | LSQ47-300LB | LSQ47300XLX4 | 305 | 255 | 200.0 | M20 | 8-22 | 30.2 | 157.2 | 1.5 | 149.23 | 7.92 | 11.91 | 168 | 131.8 | 157.2 | 158.8 | 130.2 |
| 150 | 6 | LSQ47-300LB | LSQ47300XLX6 | 457 | 320 | 269.9 | M20 | 12-22 | 35.0 | 215.9 | 1.5 | 211.12 | 7.92 | 11.91 | 227 | 190.5 | 215.9 | 217.5 | 188.9 |
| 200 | 8 | LSQ47-300LB | LSQ47300XLX8 | 502 | 380 | 330.2 | M24 | 12-26 | 39.7 | 269.7 | 1.5 | 269.88 | 7.92 | 11.91 | 281 | 238.1 | 269.9 | 271.5 | 236.5 |
| 250 | 10 | LSQ47-300LB | LSQ47300XLX10 | 568 | 445 | 387.4 | M27 | 16-30 | 46.1 | 323.8 | 1.5 | 323.85 | 7.92 | 11.91 | 335 | 285.8 | 323.8 | 325.4 | 284.2 |
| 300 | 12 | LSQ47-300LB | LSQ47300XLX12 | 648 | 520 | 450.8 | M30 | 16-33 | 49.3 | 381 | 1.5 | 381 | 7.92 | 11.91 | 392 | 342.9 | 381 | 382.6 | 341.3 |
| 350 | 14 | LSQ47-300LB | LSQ47300XLX14 | 762 | 585 | 514.4 | M30 | 20-33 | 52.4 | 412.8 | 1.5 | 419.1 | 7.92 | 11.91 | 424 | 374.6 | 412.8 | 414.3 | 373.1 |
| 400 | 16 | LSQ47-300LB | LSQ47300XLX16 | 838 | 650 | 571.5 | M33 | 20-36 | 55.6 | 469.9 | 1.5 | 469.9 | 7.92 | 11.91 | 481 | 425.4 | 469.9 | 471.5 | 423..9 |
| 450 | 18 | LSQ47-300LB | LSQ47300XLX18 | 914 | 710 | 628.6 | M33 | 24-36 | 58.8 | 533.4 | 1.5 | 533.4 | 7.92 | 11.91 | 544 | 489 | 533.4 | 535 | 487.4 |
| 500 | 20 | LSQ47-300LB | LSQ47300XLX20 | 991 | 775 | 685.8 | M33 | 24-36 | 62.0 | 584.2 | 1.5 | 584.2 | 9.53 | 13.49 | 595 | 533.4 | 584.2 | 585.8 | 531.8 |
| 600 | 24 | LSQ47-300LB | LSQ47300XLX24 | 1143 | 915 | 812.8 | M39×3 | 24-42 | 68.3 | 692.2 | 1.5 | 692.15 | 11.13 | 16.66 | 703 | 641.4 | 692.2 | 693.7 | 639.8 |
| 650 | 26 | LSQ47-300LB | LSQ47300XLX26 | 1245 | 970 | 876.3 | M42 | 28-45 | 77.8 | ||||||||||
| 700 | 28 | LSQ47-300LB | LSQ47300XLX28 | 1346 | 1035 | 939.8 | M42 | 28-45 | 84.2 | ||||||||||
| 750 | 30 | LSQ47-300LB | LSQ47300XLX30 | 1397 | 1090 | 997.0 | M45 | 28-48 | 90.5 | ||||||||||
| 800 | 32 | LSQ47-300LB | LSQ47300XLX32 | 1524 | 1150 | 1054.1 | M48 | 28-51 | 96.9 | ||||||||||
| 850 | 34 | LSQ47-300LB | LSQ47300XLX34 | 1626 | 1205 | 1104.9 | M48 | 28-51 | 100.1 | ||||||||||
| 900 | 36 | LSQ47-300LB | LSQ47300XLX36 | 1727 | 1270 | 1168.4 | M52 | 32-55 | 103.2 | ||||||||||
| 1000 | 40 | LSQ47-300LB | LSQ47300XLX40 | 1956 | 1240 | 1155.7 | M42 | 32-45 | 112.8 | ||||||||||
| 1050 | 42 | LSQ47-300LB | LSQ47300XLX42 | 2083 | 1290 | 1206.5 | M42 | 32-45 | 117.5 | ||||||||||
| 1200 | 48 | LSQ47-300LB | LSQ47300XLX48 | 2170 | 1465 | 1371.6 | M48 | 32-51 | 131.8 | ||||||||||
| 50 | 2 | LSQ47-600LB | LSQ47600XLX2 | 292 | 165 | 127.0 | M16 | 8-18 | 25.4 | 91.9 | 6.4 | 82.55 | 7.92 | 11.91 | 103 | 73 | 92.1 | 93.7 | 71.4 |
| 65 | 2.5 | LSQ47-600LB | LSQ47600XLX2.5 | 330 | 190 | 169.2 | M20 | 8-22 | 28.6 | 104.6 | 6.4 | 101.6 | 7.92 | 11.91 | 116 | 85.7 | 104.8 | 106.4 | 84.1 |
| 80 | 3 | LSQ47-600LB | LSQ47600XLX3 | 356 | 210 | 168.3 | M20 | 8-22 | 31.8 | 127 | 6.4 | 123.83 | 7.92 | 11.91 | 138 | 108 | 127 | 128.6 | 106.4 |
| 100 | 4 | LSQ47-600LB | LSQ47600XLX4 | 432 | 275 | 215.9 | M24 | 8-26 | 38.1 | 157.2 | 6.4 | 149.23 | 7.92 | 11.91 | 168 | 131.8 | 157.2 | 158.8 | 130.2 |
| 150 | 6 | LSQ47-600LB | LSQ47600XLX6 | 559 | 355 | 292 | M27 | 12-30 | 48 | 215.9 | 6.4 | 211.12 | 7.92 | 11.91 | 227 | 190.5 | 215.9 | 217.5 | 188.9 |
| 200 | 8 | LSQ47-600LB | LSQ47600XLX8 | 660 | 420 | 349 | M30 | 12-33 | 56 | 269.7 | 6.4 | 269.88 | 7.92 | 11.91 | 281 | 238.1 | 269.9 | 271.5 | 236.5 |
| 250 | 10 | LSQ47-600LB | LSQ47600XLX10 | 787 | 510 | 431 | M33 | 16-36 | 64 | 323.8 | 6.4 | 323.85 | 7.92 | 11.91 | 335 | 285.8 | 323.8 | 325.4 | 284.2 |
| 300 | 12 | LSQ47-600LB | LSQ47600XLX12 | 838 | 560 | 489 | M33 | 20-36 | 67 | 381 | 6.4 | 381 | 7.92 | 11.91 | 392 | 342.9 | 381 | 382.6 | 341.3 |
| 350 | 14 | LSQ47-600LB | LSQ47600XLX14 | 889 | 605 | 527 | M36X3 | 20-39 | 70 | 412.8 | 6.4 | 419.1 | 7.92 | 11.91 | 424 | 374.6 | 412.8 | 414.3 | 373.1 |
| 400 | 16 | LSQ47-600LB | LSQ47600XLX16 | 991 | 685 | 603 | M39X3 | 20-42 | 76 | 469.9 | 6.4 | 469.9 | 7.92 | 11.91 | 481 | 425.4 | 469.9 | 471.5 | 423..9 |
| 450 | 18 | LSQ47-600LB | LSQ47600XLX18 | 1092 | 745 | 654 | M42X3 | 20-45 | 83 | 533.4 | 6.4 | 533.4 | 7.92 | 11.91 | 544 | 489 | 533.4 | 535 | 487.4 |
| 500 | 20 | LSQ47-600LB | LSQ47600XLX20 | 1194 | 815 | 724 | M42X3 | 24-45 | 89 | 584.2 | 6.4 | 584.2 | 9.53 | 13.49 | 595 | 533.4 | 584.2 | 585.8 | 531.8 |
| 600 | 24 | LSQ47-600LB | LSQ47600XLX24 | 1397 | 940 | 838 | M48X3 | 24-51 | 102 | 692.2 | 6.4 | 692.15 | 11.13 | 16.66 | 703 | 641.4 | 692.2 | 693.7 | 639.8 |
| 650 | 26 | LSQ47-600LB | LSQ47600XLX26 | 1448 | 1015 | 914 | M48 | 28-51 | 108 | ||||||||||
| 700 | 28 | LSQ47-600LB | LSQ47600XLX28 | 1549 | 1075 | 965 | M52 | 28-55 | 111 | ||||||||||
| 750 | 30 | LSQ47-600LB | LSQ47600XLX30 | 1651 | 1130 | 1022 | M52 | 28-55 | 114 | ||||||||||
| 800 | 32 | LSQ47-600LB | LSQ47600XLX32 | 1778 | 1195 | 1080 | M56 | 28-60 | 118 | ||||||||||
| 850 | 34 | LSQ47-600LB | LSQ47600XLX34 | 1930 | 1245 | 1130 | M56 | 28-60 | 121 | ||||||||||
| 900 | 36 | LSQ47-600LB | LSQ47600XLX36 | 2083 | 1315 | 1194 | M64 | 28-68 | 124 | ||||||||||
| 50 | 2 | LSQ47-900LB | LSQ47900XLX2 | 368 | 215 | 165.1 | M24 | 8-26 | 38.1 | 91.9 | 6.4 | 95.25 | 7.92 | 11.91 | 103 | 73 | 92.1 | 93.7 | 71.4 |
| 65 | 2.5 | LSQ47-900LB | LSQ47900XLX2.5 | 419 | 245 | 190.5 | M27 | 8-30 | 41.3 | 104.6 | 6.4 | 107.95 | 7.92 | 11.91 | 116 | 85.7 | 104.8 | 106.4 | 84.1 |
| 80 | 3 | LSQ47-900LB | LSQ47900XLX3 | 381 | 240 | 190.5 | M24 | 8-26 | 38.1 | 127 | 6.4 | 123.83 | 7.92 | 11.91 | 138 | 108 | 127 | 128.6 | 106.4 |
| 100 | 4 | LSQ47-900LB | LSQ47900XLX4 | 457 | 290 | 235 | M30 | 8-33 | 44.5 | 157.2 | 6.4 | 149.23 | 7.92 | 11.91 | 168 | 131.8 | 157.2 | 158.8 | 130.2 |
| 150 | 6 | LSQ47-900LB | LSQ47900XLX6 | 610 | 380 | 317.5 | M30 | 12-33 | 55.6 | 215.9 | 6.4 | 211.12 | 7.92 | 11.91 | 227 | 190.5 | 215.9 | 217.5 | 188.9 |
| 200 | 8 | LSQ47-900LB | LSQ47900XLX8 | 737 | 470 | 393.7 | M36x3 | 12-39 | 63.5 | 269.7 | 6.4 | 269.88 | 7.92 | 11.91 | 281 | 238.1 | 269.9 | 271.5 | 236.5 |
| 250 | 10 | LSQ47-900LB | LSQ47900XLX10 | 838 | 545 | 469.9 | M36x3 | 16-39 | 69.9 | 323.8 | 6.4 | 323.85 | 7.92 | 11.91 | 335 | 285.8 | 323.8 | 325.4 | 284.2 |
| 300 | 12 | LSQ47-900LB | LSQ47900XLX12 | 965 | 610 | 533.4 | M36x3 | 20-39 | 79.4 | 381 | 6.4 | 381 | 7.92 | 11.91 | 392 | 342.9 | 381 | 382.6 | 341.3 |
| 350 | 14 | LSQ47-900LB | LSQ47900XLX14 | 1029 | 640 | 558.8 | M39x3 | 20-42 | 85.8 | 412.8 | 6.4 | 419.1 | 11.13 | 16.66 | 424 | 374.6 | 412.8 | 414.3 | 373.1 |
| 400 | 16 | LSQ47-900LB | LSQ47900XLX16 | 1130 | 705 | 616 | M42x3 | 20-45 | 88.9 | 469.9 | 6.4 | 469.9 | 11.13 | 16.66 | 481 | 425.4 | 469.9 | 471.5 | 423..9 |
| 450 | 18 | LSQ47-900LB | LSQ47900XLX18 | 1219 | 785 | 685.8 | M48x3 | 20-51 | 101.6 | 533.4 | 6.4 | 533.4 | 12.7 | 19.84 | 544 | 489 | 533.4 | 535 | 487.4 |
| 500 | 20 | LSQ47-900LB | LSQ47900XLX20 | 1321 | 855 | 749.3 | M52x3 | 20-55 | 108.0 | 584.2 | 6.4 | 584.2 | 12.7 | 19.84 | 595 | 533.4 | 584.2 | 585.8 | 531.8 |
| 600 | 24 | LSQ47-900LB | LSQ47900XLX24 | 1549 | 1040 | 901.7 | M64x3 | 20-68 | 139.7 | 692.2 | 6.4 | 692.15 | 15.88 | 26.97 | 703 | 641.4 | 692.2 | 693.7 | 639.8 |
| 650 | 26 | LSQ47-900LB | LSQ47900XLX26 | 1651 | 1085 | 952.5 | M70 | 20-74 | 139.7 | ||||||||||
| 700 | 28 | LSQ47-900LB | LSQ47900XLX28 | 1753 | 1170 | 1022.4 | M76 | 20-80 | 142.9 | ||||||||||
| 750 | 30 | LSQ47-900LB | LSQ47900XLX30 | 1880 | 1230 | 1085.9 | M76 | 20-80 | 149.3 | ||||||||||
| 800 | 32 | LSQ47-900LB | LSQ47900XLX32 | 2032 | 1315 | 1155.7 | M82 | 20-86 | 158.8 | ||||||||||
| 850 | 34 | LSQ47-900LB | LSQ47900XLX34 | 2159 | 1395 | 1225.6 | M90 | 20-94 | 165.1 | ||||||||||
| 900 | 36 | LSQ47-900LB | LSQ47900XLX36 | 2286 | 1460 | 1289.1 | M90 | 20-94 | 171.5 |
This valve offers prominent advantages including friction‑free opening‑closing, low operating torque, extended seat service life, dependable sealing, smooth actuation, suitability for high‑pressure‑differential conditions, robust construction and low maintenance costs.
