CAST STEEL TRUNNION BALL VALVE

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CAST STEEL TRUNNION BALL VALVE 1.Blow-out proof stem For the purpose of preventing the stem from flying off resulting in abnormal rising of the inner pressure of valve,shoulder is fixed at the lower part of the stem.In addition,in order to prevent leakage resulting from burnout of packing set of the stem in a fire,thrust bearing is set at the contact position of the shoulder at lower part of the stem and valve body.Thus an inverse seal seat is formed which will prevent leakage and avoid accident. 2.Key lock Locks can be used to lock the manual valve when it is fully open or closed so as to prevent non-working personnel from pulling the handle which may result in misoperation of valve.It can also avoid opening or closing of valve resulting from the shock from pipelines or unpredictable factors that may cause an accident.For working pipelines such as combustible and explosive oil,gas and chemical medium,or for field piping site,the locking mechanism is especially useful. 3.Anti-fire safe design When the trunnion ball valve be used normally,its sealed by seat and ball surface,seat retainer sealed by O-ring and body,this is soft sealed and reliable sealing.When the seat and O-ring are burnt,the seat retainer and body will be sealed by expanded graphite.Thus act anti-fire safe purpose. 4.Anti-static device In order to prevent friction among ball,stem and PTFE that generates static electricity which may light the combustibles and explosives that cause an accident,in this ball valve,static-conduction spring is set between the stem and the ball,the stem and the body.Thus static electricity is conducted to ground and system safety is secured. 5.Free leakage of body Sealed construction The connective position of valve body and bonnet is double sealed by gasket and O-ring,on this base,such factors as fire,high temperature,shock and uneven opening or closing of the torque all can��t induce external leakage. 6. Double block&bleed(DBB) When ball is full open or close position,the transmitter substance in center cavity of body can be released by drainage and emptying devices.In addition,the over loaded pressure in the center cavity of valve can be released to low pressure end by self relief seat. 7.Emergency sealing Compound injection holes are designed and compound injection valves are installed at locations of stem/cap and body support of side valve.When sealing of stem or seat is damaged to induce leakage,the compound can be used to do the second time sealing.A concealed check valve is installed in side of each compound injection valve to prevent compound from out flowing due to the action of transmitter substance.The top of the compound injection valve is the connector for fast connection with compound injection gun. 8.Automatic body cavity relief When the body pressure going up un-normally as the unstable factor,the trunnion ball valve downstream seat will be pushed by unnormal pressure,and the release the un-normally pressure automatically,it doesn't damage to the sealing of upstream seat. 9.Various driving types The top pad of valve designed according to ISO 5211,which is convenient for connection and exchange of various drivers.The common driving types are manual,electrical,pneumatic and pneumatic/hydraulic. CLASS 150~1500 CAST STEEL FIXED BALL BALVE Dimensions Class 150 Size inch 6 8 10 12 14 16 18 20 24 L-RF mm 394 457 533 610 686 762 864 914 1067 L1-BW mm 457 521 559 635 762 838 914 991 1143 L2-RTJ mm 406 470 546 622 698 725 876 927 1079 B mm 152 203 254 305 337 687 438 489 591 H mm 270 315 360 410 425 475 525 590 695 K mm 300 300 400 400 600 600 600 600 750 WT Kg 110 160 320 448 567 850 1050 1350 1750 Dimensions Class 300 Size inch 6 8 10 12 14 16 18 20 24 L,L-RF~BW mm 403 502 568 648 762 838 914 991 1143 L2-RTJ mm 419 518 584 664 778 854 930 1010 1165 B mm 152 203 254 305 337 387 438 489 591 H mm 285 345 380 345 450 495 570 615 710 K mm 300 300 400 400 600 600 600 750 750 WT Kg 128 210 345 560 780 1020 1200 1625 2285 Dimensions Class 600 Size inch 2 2-1/2 3 4 6 8 10 12 14 16 18 20 24 L,L-RF~BW mm 292 330 356 432 559 660 787 838 889 991 1092 1194 1397 L2-RTJ mm 295 333 359 435 562 664 791 841 892 994 1095 1200 1407 B mm 51 64 76 102 152 203 254 305 337 387 438 489 591 H mm 190 230 265 295 300 355 415 455 505 515 600 640 735 K mm 250 250 300 300 400 400 400 600 600 600 750 750 750 WT Kg 34 40 45 98 200 395 555 840 1015 1220 1350 2080 2745 Dimensions Class 900 Size inch 2 2-1/2 3 4 6 8 10 12 14 16 18 20 L,L-RF~BW mm 368 419 381 457 610 737 838 965 1029 1130 1219 1321 L2-RTJ mm 371 422 384 460 613 740 841 968 1038 1140 1323 1334 B mm 51 64 76 102 152 203 254 305 324 375 425 473 H mm 210 250 285 280 360 455 510 525 595 650 685 695 K mm 250 300 300 400 400 600 600 600 750 750 750 800 WT Kg 45 50 72 130 235 495 690 1050 1350 1750 2300 2850 Dimensions Class 1500 Size inch 2 2-1/2 3 4 6 8 10 L,L-RF~BW mm 368 419 470 546 706 832 991 L2-RTJ mm 371 422 473 549 711 841 1000 B mm 51 64 76 102 146 184 241 H mm 230 260 290 305 370 470 520 K mm 300 300 400 400 600 600 750 WT Kg 52 74 98 144 320 695 960 Similar Products • api-6d trunnion mounted ball valves • top entry ball valve • forged steel cryogenic ball valve • forged steel ball valve • class 150~1500 forged steel trunnion ball valve • class 150~1500 cast steel trunnion ball Valve • class 150~300 floating ball valve

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ZHEJIANG ZHONGKE VALVES CO.,LTD

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