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Cryogenic Fully Welded Five-Eccentric Ball Valve Zero-Friction Design LNG Pipeline Service

Cryogenic Fully Welded Five-Eccentric Ball Valve Zero-Friction Design LNG Pipeline Service
  • Nominal Diameter: DN6‑DN1400 (0.25″‑56″)
  • Nominal Pressure: PN110‑PN150 (Class 600‑Class 900)
  • Operation Mode: Handwheel, Gear‑operated
  • Body Material: WC6, WC9, 304, 316L
  • Seat Material: Metal‑to‑Metal
  • Manufacturing Standards: EN 1092‑1 / ASME B16.5, EN 488 / EN 488‑1, EN 13941, API 608, etc.
  • Connection Type: Welded End
  • Operating Temperature: -196°C‑ 220°C
  • Applicable Media: LNG, Liquid Nitrogen (LIN), Liquid Oxygen (LOX), Liquid Argon (LAR), Liquid Hydrogen (LH₂), LNG components, liquefied ethylene, liquefied ethane and other cryogenic liquefied gases
For technical drawings and 3-D models, click on a part number.

Product details

The Cryogenic Five‑Offset Fully‑Welded Zero‑Friction Ball Valve is a high‑performance pipeline ball valve engineered for low‑temperature and cryogenic service conditions. It adopts a five‑offset structure, zero‑friction opening‑closing design and fully‑welded body, and is mainly used for transportation and shut‑off of cryogenic media such as LNG, liquid nitrogen and liquid oxygen.

With a special five‑offset motion path, the ball separates from the sealing surfaces first before rotation during opening and closing, and gradually approaches and compresses the seat upon closure. This greatly reduces friction between the ball and seat found in conventional ball‑valve operation, lowering operating torque and wear of sealing surfaces.

Working Principle of Zero‑Friction Cryogenic Five‑Offset Ball Valve：
Opening Process: The valve stem is rotated by a handwheel, worm‑gear or actuator. Thanks to the five‑offset geometric structure, the ball separates completely from the valve seat the instant rotation begins, achieving zero friction and no scuffing throughout the rotary stroke. The ball passage opens gradually for smooth medium flow, and the valve reaches the fully‑open position after a 90‑degree rotation.

Closing Process: The stem is driven in reverse rotation and the flow passage is gradually closed. Once the ball is seated, the five‑offset structure generates powerful axial wedging force to bring the ball into precise contact with the metal seat. A high‑pressure bidirectional zero‑leakage seal is formed to completely shut‑off the cryogenic medium. Contact between sealing surfaces only occurs momentarily during final compression and pre‑opening separation. Zero friction is maintained over the whole rotation cycle, preventing sealing‑surface damage caused by cryogenic‑medium erosion.

Product Specifications

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）

Fully Welded Cryogenic Valve – 600LB-900LB

DNType/ClassPart NoDLELRFLRTJH1H2
6 DQ661-600LBDQ661600XLX65.91 22 22 22.1 7.3 7.9
8 DQ661-600LBDQ661600XLX87.91 26 26 26.1 10 10.8
10 DQ661-600LBDQ661600XLX109.92 31 31 31.1 12 12.8
12 DQ661-600LBDQ661600XLX1211.93 33 33 33.1 13.8 14.6
14 DQ661-600LBDQ661600XLX1413.15 35 35 35.1 13.8 17.3
16 DQ661-600LBDQ661600XLX1615.16 39 39 39.1 15.2 19.1
18 DQ661-600LBDQ661600XLX1817.17 43 43 43.1 16.5 20.6
20 DQ661-600LBDQ661600XLX2019.17 47 47 14.2 18.9 22.2
22 DQ661-600LBDQ661600XLX2221.18 51 51 51 21.3 23
24 DQ661-600LBDQ661600XLX2423.19 55 55 55.4 23 25.4
26 DQ661-600LBDQ661600XLX2624.92 57 57 58 24.6 26.8
28 DQ661-600LBDQ661600XLX2826.93 61 61 62 25.6 28.4
30 DQ661-600LBDQ661600XLX3028.94 65 65 66 27 30.6
32 DQ661-600LBDQ661600XLX3230.67 70 70 71 28.4 31.9
34 DQ661-600LBDQ661600XLX3432.68 76 76 77 30.1 33.7
36 DQ661-600LBDQ661600XLX3634.41 82 82 83 33.3 35.1
40 DQ661-600LBDQ661600XLX4038.43 82.7 85 86 35.8 39
42 DQ661-600LBDQ661600XLX4240.16 86.6 88 89 37.2 40.5
44 DQ661-600LBDQ661600XLX4441.97 86.6 91 92 38.6 42
48 DQ661-600LBDQ661600XLX4845.91 90.55 98 99 43.3 45.9
56 DQ661-600LBDQ661600XLX5653.54 84.4 115 116 48.2 52.3
150 DQ661-600LBDQ661600XLX150150 559 559 562 185 200
200 DQ661-600LBDQ661600XLX200201 660 660 664 254 275
250 DQ661-600LBDQ661600XLX250252 787 787 791 305 325
300 DQ661-600LBDQ661600XLX300303 838 838 841 350 370
350 DQ661-600LBDQ661600XLX350334 889 889 892 350 440
400 DQ661-600LBDQ661600XLX400385 991 991 994 385 485
450 DQ661-600LBDQ661600XLX450436 1092 1092 1095 420 522
500 DQ661-600LBDQ661600XLX500487 1194 1194 1200 480 565
550 DQ661-600LBDQ661600XLX550538 1295 1295 1305 535 605
600 DQ661-600LBDQ661600XLX600589 1397 1397 1407 585 645
650 DQ661-600LBDQ661600XLX650633 1448 1448 1461 625 680
700 DQ661-600LBDQ661600XLX700684 1549 1549 1562 650 721
750 DQ661-600LBDQ661600XLX750735 1651 1651 1664 685 777
800 DQ661-600LBDQ661600XLX800779 1778 1778 1794 720 810
850 DQ661-600LBDQ661600XLX850830 1930 1930 1946 765 855
900 DQ661-600LBDQ661600XLX900874 2083 2083 2099 795 891
1000 DQ661-600LBDQ661600XLX1000976 2100 2159 2174 910 990
1050 DQ661-600LBDQ661600XLX10501020 2200 2235 2250 945 1030
1100 DQ661-600LBDQ661600XLX11001066 2200 2311 2327 980 1067
1200 DQ661-600LBDQ661600XLX12001166 2300 2489 2504 1100 1165
1400 DQ661-600LBDQ661600XLX14001384 2500 2921 2936 1225 1328
6 DQ661-900LBDQ661900XLX65.91 24 24 24.1 7.3 79
8 DQ661-900LBDQ661900XLX87.91 29 29 29.1 10 10.8
10 DQ661-900LBDQ661900XLX109.92 33 33 33.1 12 12.8
12 DQ661-900LBDQ661900XLX1211.93 38 38 38.1 13.8 14.6
14 DQ661-900LBDQ661900XLX1412.68 40.5 40.5 40.9 14.4 17.9
16 DQ661-900LBDQ661900XLX1614.69 44.5 44.5 44.9 16.1 19.7
18 DQ661-900LBDQ661900XLX1816.65 48 48 48.5 17.5 21.3
20 DQ661-900LBDQ661900XLX2018.54 52 52 52.5 19.9 22.9
22 DQ661-900LBDQ661900XLX2221.18 56.3 56.3 57 22 25.3
24 DQ661-900LBDQ661900XLX2422.44 61 61 61.7 24.2 27.4
26 DQ661-900LBDQ661900XLX2624.29 65 65 65.87 25.8 28.7
28 DQ661-900LBDQ661900XLX2826.18 67 67 67926.8 30.5
30 DQ661-900LBDQ661900XLX3028.94 74 74 74.9 28.1 32.1
32 DQ661-900LBDQ661900XLX3230.67 74 74 74.9 29.5 33.7
34 DQ661-900LBDQ661900XLX3432.68 78 78 79.1 31.3 35.3
36 DQ661-900LBDQ661900XLX3634.41 84 84 85.1 32.5 37.2
40 DQ661-900LBDQ661900XLX4037.48 82.7 89.9 91 37 40.5
42 DQ661-900LBDQ661900XLX4239.29 86.6 96 97 37.8 42.5
44 DQ661-900LBDQ661900XLX4441.18 86.6 100 101 40.1 44.1
48 DQ661-900LBDQ661900XLX484,49290.5 109 110 44947.9
56 DQ661-900LBDQ661900XLX5653.54 80.6 98 47.5 52.3
150 DQ661-900LBDQ661900XLX150150 610 610 613 185 200
200 DQ661-900LBDQ661900XLX200201 737 737 740 254 275
250 DQ661-900LBDQ661900XLX250252 838 838 841 305 325
300 DQ661-900LBDQ661900XLX300303 965 965 968 350 370
350 DQ661-900LBDQ661900XLX350322 1029 1029 1038 365 455
400 DQ661-900LBDQ661900XLX400373 1130 1130 1140 410 500
450 DQ661-900LBDQ661900XLX450423 1219 1219 1232 445 540
500 DQ661-900LBDQ661900XLX500471 1321 1321 1334 505 582
550 DQ661-900LBDQ661900XLX550522 1429 1429 1448 560 642
600 DQ661-900LBDQ661900XLX600570 1549 1549 1568 615 695
650 DQ661-900LBDQ661900XLX650617 1651 1651 1679 655 730
700 DQ661-900LBDQ661900XLX700665 1702 1702 1724 680 775
750 DQ661-900LBDQ661900XLX750712 1880 1880 1902 715 815
800 DQ661-900LBDQ661900XLX800760 1880 1880 1902 750 855
850 DQ661-900LBDQ661900XLX850808 1981 1981 2010 795 896
900 DQ661-900LBDQ661900XLX900855 2134 2134 2162 825 945
1000 DQ661-900LBDQ661900XLX1000952 2100 2283 2311 940 1028
1050 DQ661-900LBDQ661900XLX1050998 2200 2438 2461 985 1081
1100 DQ661-900LBDQ661900XLX11001046 2200 2540 2568 1020 1120
1200 DQ661-900LBDQ661900XLX12001141 2300 2769 2797 1140 1210
1400 DQ661-900LBDQ661900XLX14001360 2048 2489 一1205 1328

Five‑Offset Zero‑Friction Cryogenic Ball Valve | Fully Welded Industrial Valve

Featuring five‑offset zero‑friction sealing and an integral fully‑welded body, this valve operates without sealing‑surface scuffing and delivers stable torque during opening‑closing cycles. Its metal‑to‑metal hard‑seal construction provides bidirectional zero‑leakage performance. Rated for cryogenic service down to ‑196 °C, it resists low‑temperature brittleness and pressure cycling. With explosion‑safe properties and maintenance‑free operation, it supports multiple actuation options and is well‑suited for transmission pipelines carrying hazardous cryogenic media such as LNG.