docApplications Flowlines, manifolds, pipeline
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Applications Flowlines, manifolds, pipeline
Applications Flowlines, manifolds, pipeline transmission and distribution, pressure regulation and metering runs, underground storage, waterflood and general pipeline service in onshore, offshore and subsea locations. Also may be used as sphere launcher or receiver when fitted with a SPHERE-LOCK ball. Product Description Features • Through conduit, full round opening • Bubble-tight sealing from zero to full rated pressure • Upstream and downstream sealing under any operating conditions – full block and bleed capability • Metal-to-metal primary seal – protected ‘O’ ring secondary seal • Self-cleaning ball • Bolted construction permits disassembly on site • Double stem seals - replacement possible with pipeline under pressure subject to operational procedures and/or risk assessment • Integral mechanical stops • Low operating torque assured by the design of the trunnion mounted • Both upstream and downstream seat seals capable of sealing upstream pressure The CORT C-B5 Ball Valve uses a three piece, bolted body design manufactured from ring rolled forgings. The cast or forged ball features integral, external trunnions which turn in bearings mounted in bearing retainer blocks. These bearing retainers are precision located between the ball valve closures which are then able to resist the pressure loading on the ball. The method of supporting the ball in a trunnion mounted ball valve is of little importance in cases when the valve is small and the pressures are low. However, the forces generated in a large valve closed against high pressure are enormous and they create a major challenge for the valve designer. The magnitude of the stresses and deflections generated by these forces depend upon the design employed for supporting the ball. If stresses are too high some form of valve failure will occur, either initially or at some time during service. If deflections are excessive, then the valve operating torque will be too high and the bearings may be unevenly loaded resulting in premature failure. In some designs of trunnion mounted ball valves, trunnions project from inside the valve body into sockets in the ball. These trunnions are therefore subjected to a couple which could be massive and result in unacceptable deflections together with high stress levels in the valve body which is already subject to pressure forces. In other designs, the valve stem is used as a trunnion which creates the additional problem of possible stem leaks due to the application of side loads to the stem seals. The design used in the CORT C-B5 for supporting the ball is not the lowest cost but it is the most elegant and effective engineering solution. Both trunnions and the ball are a single component, thus eliminating the problems associated with a highly stressed joint. The trunnions are as close together as possible (normally within the ball spherical diameter) ensuring that the bending moment is minimised and applied to only the stiffest part of the ball. The trunnions are short in relation to their diameter and primarily subject only to shear stress. The force is transmitted into the valve closures via the bearing retainers, which are put into compression. The result is that for practical purposes, bending is eliminated from these components and the deflections produced are minimal. Mating surfaces remain square and parallel to each other so that stress distributions are uniform and stress levels remain low. The stem is not rigidly attached to the upper trunnion and therefore, although it can apply torsion to the ball, no side thrust is transmitted from the ball onto the stem seals. The seat design assures bubble-tight independent upstream and downstream sealing. When the ball is in the closed position, sealing is achieved by both a primary metal-to-metal seal and a secondary, protected ‘O’ ring seal. The inner lip of the metal seat and the seal ride on the polished surface of the electroless nickel coated ball. The force for the initial seal, at low pressure differential or in vacuum conditions, is provided by helical springs spaced around the seat circumference. As line pressure increases, it acts on the upstream seal producing a proportional force in addition to the spring loading to force the upstream seal tightly against the ball. In its standard form, the CORT C-B5 is designed so that if upstream pressure should reach the downstream seat then it will also be forced against the ball creating a bubble-tight seal. In this way, the CORT C-B5 provides a double barrier sealing the downstream from upstream pressure. If the valve is installed in a piping system where flow can reverse and the other side of the valve becomes the upstream then the double barrier seal continues to be effective. Range of Supply Bore Sizes - 6" - 48" Pressure Ratings - ANSI class 150 to 2500 Standard Features Block and Bleed With the ball in the closed position, the valve body may be drained or vented. In cases when the pipeline is pressurised, zero leakage from the body drain confirms the integrity of the seat seals. Alternatively, if no pipeline pressure is available, it is still possible to check seat seal integrity by applying pressure to one of the body connections. Stem Seals The stem is sealed by means of two ‘O’ rings. If leakage should ever occur through both stem seals, the secondary ‘O’ ring can be replaced with the valve in the line, under pressure. When the valve is in the closed position with the body pressure bled off to atmosphere, it is possible to remove the gland for replacement of both primary and secondary stem ‘O’ rings. The stem can also be removed and replaced if necessary. Mechanical Stops The CORT C-B5 design includes integral mechanical stops. This feature is essential for accurately setting the travel limits on a power actuator when it is site fitted to a valve already installed in a pipeline. Low Operating Torque The ball trunnions revolve in PTFE impregnated metal sleeve bearings which do not require lubrication. Due to the characteristics of these bearings and the design employed for supporting the ball, the CORT C-B5 can be operated by applying a relatively low input torque. This ensures fast operation, and permits the use of smaller, less expensive manual or power operators. Field Disassembly The CORT C-B5 is designed to permit easy disassembly in the field, for the purpose of inspecting or replacing parts. Prior to reinstallation in the pipeline, even if no test blanks are available, all seals may be simultaneously tested by pressuring the valve body. Alternatively, CORT offer a factory refurbishing service which ensures that valves are returned to customers in an as-new condition with a full warranty. Optional Features Emergency Seal Under throttling conditions or if excessive debris is present then the possibility of leakage is greater than when a valve is used for normal on-off service. All valves are designed not to require sealants. However, if the metal-to-metal primary seal and the secondary ‘O’ ring seal are damaged, an emergency shut-off may be obtained with a sealant injected into a specially designed groove in the seat ring assembly. A design of emergency stem seal is also available. Operating Extensions Extensions can be supplied to enable underground valves to be operated from ground level. These are extended yoke and drive tube design and are watertight for buried service. Extended Blow-Down Valves C-B5 valve body cavities can be vented to atmosphere and completely drained down by the optional extended body drain valve. This operation may be performed with the line under pressure and the ball in closed position. The connection between the valve and the pipework may be threaded, flanged or welded according to customer specification. Transition Pieces Weld-end valves can be supplied with a short length of pipeline pipe welded to each end ensuring that they can be installed with standard pipeline welds. Sphere-Lock Ball The CORT C-B5 can be fitted with a SPHERE-LOCK ball which is blind and has a cavity sized to suit pipeline spheres. This converts the valve into a SPHERE-LOCK Mechanical Transfer Chamber suitable for pigging and bypass duty. A SPHERE-LOCK launch station followed by a SPHERE-LOCK receive station may be installed anywhere in the pipeline with additional SPHERE-LOCK valves used to bypass pumps or compressors if required. Body Materials Body Closures Body Bolting Gland Plate Standard Carbon Steel ASTM A350-LF2 Modified (50000psi min yield) Carbon Steel ASTM A350-LF2 Modified (50000psi min yield) ASTM A193 Grade B7 Studs ASTM A194 Class 2H Nuts Carbon Steel BS 4360 Grade 43A BS 4360 Grade 50B ASTM A350-LF2 Modified (50000psi min yield) Options Stainless Steels Weld Overlayed Epoxy/Phenolic Linig Stainless Steels Weld Overlayed Epoxy/Phenolic Lining Low Temperature Alloy Steel Stainless Steel Stainless Steels Weld Overlayed Epoxy/Phenolic Lining Standard Carbon Steel BS 4360 Grade 43A BS 4360 Grade 50D Steel backed PTFE Type DU Electroless Nickel Coated Carbon Steel Electroless Nickel Coated Carbon Steel BS 970 070M20 Electroless Nickel Coated Carbon Steel ASTM A350-LF2 Modified (50000psi min yield) Electroless Nickel Coated Cast Steel ASTM A148 Grade 90-60 Electroless Nickel Coated Carbon Steel BS 970 070M20 BS 970 080M40 Options Stainless Steels Weld Overlayed Epoxy/Phenolic Lining Fibreglide Resin Trim Materials Bearing Retainers Bearings Thrust Washers Ball Seat Rings Seat Springs ‘O’ Ring Seals Stem Drive Pins 18/8 Austenitic Stainless Steel Specially compounded Nitrile synthetic rubber Nylon PA12G Electroless Nickel Coated Carbon Steel BS 970 220M07 BS 970 070M20 Heat Treated Alloy Steel BS 970 709M40 Other Options • Hardness controlled materials (to suit NACE MR-01-75) • Spring Energised Polymer Seals Stainless Steels Weld Overlayed Hard Faced (Tungsten Carbide or Stellite) Stainless Steels Weld Overlayed Hard Faced (Tungsten Carbide or Stellite) Inconel X750 Viton HNBR Stainless Steels Stainless Steels Dimensional Outline Drawing Weights and Dimensions Class 150 Valve Size (inch) A B C (R.F) C (W.E) D Weight (Kg) WE RF 6 162 152 394 457 295 202 193 8x6x8 162 152 457 521 295 227 216 8 203 203 457 521 375 352 330 10 x 8 x 10 203 203 533 559 375 375 352 10 248 254 533 559 419 500 477 12 x 8 x 12 248 254 610 635 419 534 500 12 289 305 610 635 460 705 659 16 x 10 x 16 289 305 762 838 460 773 727 14 308 337 686 762 470 864 818 16 346 387 762 838 508 1023 977 20 x 16 x 20 346 387 914 991 508 1125 1057 18 387 438 864 914 591 1443 1364 20 429 489 914 991 632 1920 1841 24 x 20 x 24 429 489 1067 1143 632 2057 1977 22 464 540 991 1092 670 2352 2284 24 514 591 1067 1143 708 2807 2727 30 x 24 x 30 514 591 1295 1397 708 2920 2841 26 546 635 1143 1245 762 3523 3443 28 587 686 1245 1346 810 4045 3943 30 629 737 1295 1397 848 4818 4727 36 x 30 x 36 629 737 1524 1727 848 5000 4909 32 664 781 1372 1524 879 5489 5375 34 699 832 1473 1626 956 6705 6580 36 730 876 1524 1727 991 7614 7568 40 806 978 1753 1956 1064 10273 9773 42 841 1022 1854 2083 1105 12114 11514 48 972 1181 2134 2388 1283 18364 17932 Weights and Dimensions Class 300 Valve Size (inch) A B C (R.F) C (W.E) D Weight (Kg) WE RF 6 162 152 403 457 295 220 193 8x6x8 162 152 502 521 295 250 216 8 203 203 502 521 375 375 330 10 x 8 x 10 203 203 568 559 375 409 364 10 248 254 568 559 419 534 466 12 x 8 x 12 248 254 648 635 419 580 511 12 289 305 648 635 460 761 659 16 x 10 x 16 289 305 838 838 460 841 739 14 308 337 762 762 470 898 818 16 346 387 838 838 540 1295 1068 20 x 16 x 20 346 387 991 991 540 1466 1261 18 394 438 914 914 591 1705 1500 20 429 489 614 991 632 2080 1841 24 x 20 x 24 429 489 1143 1143 632 2216 1977 22 470 540 1092 1092 670 2611 2330 24 514 591 1143 1143 708 3080 2727 30 x 24 x 30 514 591 1397 1397 708 3193 2841 26 546 635 1245 1245 762 3875 3443 28 587 686 1346 1346 832 4773 3955 30 629 737 1397 1397 876 5580 4966 36 x 30 x 36 629 737 1727 1727 870 6091 5489 32 664 781 1524 1524 902 6239 5614 34 699 832 1626 1626 956 7364 6580 36 730 876 1727 1727 991 8420 7568 40 806 978 1956 1956 1064 11000 9773 Weights and Dimensions Class 600 Valve Size (inch) A B C (R.F) C (W.E) D 6 168 152 559 559 562 295 250 8x6x8 168 152 660 660 664 295 307 8 210 203 660 660 664 375 443 10 x 8 x 10 210 203 787 787 791 375 534 10 254 254 787 787 791 400 705 12 x 10 x 12 254 254 838 838 841 400 886 12 295 305 838 838 841 441 920 16 x 12 x 16 295 305 991 991 994 441 1364 14 314 337 889 889 892 502 1227 16 352 387 991 991 994 540 1534 20 x 16 x 20 352 387 1194 1194 1200 540 1966 18 403 438 1092 1092 1095 591 2136 20 438 489 1194 1194 1197 632 2636 24 x 20 x 24 438 489 1397 1397 1407 632 3432 22 476 540 1295 1295 1305 670 3364 24 514 591 1397 1397 1407 733 3955 30 x 24 x 30 514 591 1651 1651 1664 733 4727 26 556 635 1448 1448 1461 784 5148 28 568 686 1549 1549 1562 832 6057 30 629 737 1651 1651 1664 870 6489 36 x 30 x 36 629 737 2083 2083 2099 870 7375 32 664 781 1778 1778 1794 902 7818 34 708 832 1930 1930 1946 956 8500 36 743 876 2083 2083 2099 991 10636 * Please refer to Robert Cort Valves Ltd Weight (Kg) WE RF Weights and Dimensions Class 900 Valve Size (inch) A B C (R.F) C (W.E) C (R.T.J) D 6 175 150 610 610 613 343 390 295 8x6x8 175 150 737 737 740 343 480 345 8 210 201 737 737 740 352 560 435 10 x 8 x 10 210 201 838 838 841 352 695 570 10 254 252 838 838 841 400 820 640 12 295 303 965 965 968 473 1230 1000 14 318 322 1029 1029 1038 508 1610 1265 16 362 373 1130 1130 1140 546 2010 1595 20 x 16 x 20 362 373 1321 1321 1334 546 2575 1855 18 413 423 1219 1219 1232 610 2805 2215 20 454 471 1321 1321 1334 686 3460 2740 24 x 20 x 24 454 471 1549 1549 1568 686 4500 3155 24 530 570 1549 1549 1568 762 5500 4155 30 x 24 x 30 530 570 1880 1880 1902 762 6595 4785 26 587 617 1651 1651 1673 835 7160 5845 30 683 712 1880 1880 1902 997 9545 7500 36 x 30 x 36 683 712 2286 2286 2315 997 10730 8045 36 813 855 2286 2286 2315 * 12185 9730 * Please refer to Robert Cort Valves Ltd Weight (Kg) WE RF Weights and Dimensions Class 1500 Valve Size (inch) A B C (R.F) C (W.E) C (R.T.J) D 6 213 144 705 705 711 375 580 445 8 256 192 832 832 841 414 750 545 10 319 239 991 991 1000 510 1195 840 12 352 287 1130 1130 1146 541 1655 1210 14 413 315 1257 1257 1276 1276 2785 2045 16 467 360 1384 1384 1407 664 4000 3070 18 508 406 1537 1537 1559 793 * * 20 564 454 1664 1664 1686 869 * * 24 * 546 * * 1972 * * * 30 * 686 * * * * * * * Please refer to Robert Cort Valves Ltd Typical Section View & Component List Weight (Kg) WE RF Applicable Standards • API 6D Pipeline Valves • BS 6755 Pipeline Valves • ASME/ANSI B16.5 Pipe Flanges and Flanged Fittings (Standard for valve sizes up to and including 24") • ASME/ANSI B16.47 Large Diameter Steel Flanges • MSS-SP44 Steel Pipe Flanges (Standard for valve sizes 26" and above) • API 605 Large Diameter Carbon Steel Flanges • BS 1560 Specification for Steel Flanges • BS 3293 Carbon Steel Pipe Flanges • Additional standards dependent on customer specifications ISO 9001 Quality Assured Product Notes • Not certified dimensional drawings • Other sizes/classes including 40” CL900, 56" CL150-600, 24” & 30” CL1500 and 8”-20” CL2500 available All dimensions and weights are approximate. The information on this data sheet is accurate to the best of Robert Cort’s knowledge; however we reserve the right to alter the product specification at any time.
