Bolted Bonnet Swing Check Valves

API 594

YVI Swing Check Valves are designed for reliable backflow prevention, automatically ensuring unidirectional flow with a robust swing-type disc mechanism. Opting for YVI’s Swing Check Valves means choosing dependability and low maintenance, crucial for systems where reverse flow can cause damage or inefficiency.

Check Valve 3 150 WCB Optional Non-Slam Design Welded Disc Nut Pin Flange End Connections

Cast Steel Swing Check Valve

Design Features

  • Seal Welded Seat Ring
  • Disc Anti-rotational Device to Prevent 360° Rotation
  • Disc Nut Pin is Welded
  • 2”– 12” Class 150 & Class 300 and 2”– 10” Class 600 Swing Check Valves Provided with Internal Hinge Pin Design as Standard

Optional Features

Optional External Locking Lever
Optional Non-slam Design
  • Optional Threaded Seat ring
  • Optional Non-slam Design
Cast Steel Swing Check Valve

YVI Cast Steel Check Valves are designed, manufactured, and tested in accordance with ASME B16.34, API 594, and API 598. Items have been examined in accordance with API RP-591 and are Low Emissions Qualified for the bonnet flange connection. YVI offers sizes ranging from 2” through 60” diameters in pressure classes 150# through 2500# with end configurations in either RFFE, RTJ, and Buttweld. Common materials of construction such as WCB, LCB, LCC, WC6, WC9, C5, C12, and Austenitic Stainless Steel Grades are all available along with other materials upon request. To ensure casting quality, all pressure-containing castings are produced in-house.

Parts & Available Materials
No. Part Carbon Steel Stainless Steel Low Temperature High Temperature NACE Service
1 Body ASTM A216 WCB ASTM A351 CF8M ASTM A352 LCC ASTM A217 WC9 ASTM A216 WCB
2 Seat Ring ASTM A105N+HF ASTM A182 F316+HF ASTM A350 LF2+HF ASTM A182 F22+HF ASTM A105N+HF
3 Disc ASTM A216 WCB+Cr13 ASTM A351 CF8M ASTM A352 LCC+HF ASTM A217 WC9+HF ASTM A216 WCB+Cr13(NACE)
4 Hinge ASTM A216 WCB ASTM A351 CF8M ASTM A352 LCC ASTM A217 WC9 ASTM A216 WCB
5 Pin ASTM A276 410 ASTM A276 316 ASTM A276 316 ASTM A276 410 ASTM A276 410(NACE)
6 Disc Nut ASTM A276 410 ASTM A276 316 ASTM A276 316 ASTM A276 410 ASTM A276 410(NACE)
7 Hinge Pin ASTM A276 410 ASTM A276 316 ASTM A276 316 ASTM A276 420 ASTM A276 410(NACE)
8 Plug ASTM A105N ASTM A182 F316 ASTM A350 LF2 ASTM A182 F22 ASTM A105N
9 Gasket SPW.SS+Graphite
RTJSS		 SPW.SS+Graphite
RTJSS		 SPW.SS+Graphite
RTJSS		 SPW.SS+Graphite
RTJSS		 SPW.SS+Graphite
RTJSS
10 Bonnet Bolt ASTM A193 B7 ASTM A193 B8 ASTM A320 L7 ASTM A193 B16 ASTM A193 B7M
11 Bonnet Nut ASTM A194 2H ASTM A194 8 ASTM A194 7 ASTM A194 7 ASTM A194 2HM
12 Cover ASTM A216 WCB ASTM A351 CF8M ASTM A352 LCC ASTM A219 WC9 ASTM A216 WCB

Material list, other materials available/provided.

Our integrated manufacturing allows us to FAST TRACK your order.
We’ve got your Valves ready to go!

Dimension Data

Class 150

NPS in 2” 2 1/2” 3” 4” 5” 6” 8” 10” 12” 14” 16” 18” 20” 24” 26” 28” 30” 32” 36” 40” 42” 48”
DN mm 50 65 80 100 125 150 200 250 300 350 400 450 500 600 650 700 750 800 900 1000 1050 1200
L-L1 (RF-BW) in 8 8.5 9.5 11.5 13 14 19.5 24.5 27.5 31 34 38.5 38.5 51 51 57 60 60 77 85 89 101
mm 203 216 241 292 330 356 495 622 698 787 864 978 978 1295 1295 1448 1524 1524 1956 2159 2261 2566
H in 6 6.7 7.1 8.4 10.6 12.2 14.4 17 19.8 22.1 23.3 27.6 28.7 32.6 35.3 36.8 38.2 49.1 54.2 55.5 57.8 64.6
mm 153 169 181 213 268 309 367 432 502 561 592 702 727.9 826.8 897 935 970 1058 1377 1410 1468 1642
WT(RF) kg 15 22 28 42 57 79 131 177 282 380 542 632 855 970 1276 1600 2020 2430 3130 4260 5030 6680
WT(BW) kg 10 12 17 29 45 57 96 143 227 294 468 552 755 831 1120 1420 1760 2130 2930 3730 4430 5680

Class 300

NPS in 2” 2 1/2” 3” 4” 5” 6” 8” 10” 12” 14” 16” 18” 20” 24” 26” 28” 30” 32” 36” 40” 42” 48”
DN mm 50 65 80 100 125 150 200 250 300 350 400 450 500 600 650 700 750 800 900 1000 1050 1200
L-L1 (RF-BW) in 10.5 11.5 12.5 14 15.8 17.5 21 24.5 28 33 34 38.5 40 53 53 59 62.8 68 82 96 103 124.1
mm 267 292 318 356 400 444 533 622 711 838 864 978 1016 1346 1346 1499 1594 1727 2083 2438 2617 3151
H in 7 7.2 9.1 10.5 11.2 12.7 15.5 17.9 21.3 24 25.7 28.2 31.4 35.3 36.6 45.8 50 50 59.4 68.9 73.6 87.8
mm 177 182 231 266 285 323 393 454 541 608.5 653 716 796.3 896 930 1163 1270 1270 1510 1750 1870 2230
WT(RF) kg 20 30 40 65 84 118 193 310 450 595 840 933 1320 1848 2375 2660 3680 3680 5030 6290 7050 9310
WT(BW) kg 16 22 30 53 73 101 157 232 414 455 766 774 960 1792 1995 2260 2780 2780 4430 5640 6150 8310

Class 600

NPS in 2” 2 1/2” 3” 4” 5” 6” 8” 10” 12” 14” 16” 18” 20” 24” 26” 28” 30” 32” 36” 40” 42” 48”
DN mm 50 65 80 100 125 150 200 250 300 350 400 450 500 600 650 700 750 800 900 1000 1050 1200
L-L1 (RF-BW) in 11.5 13 14 17 20 22 26 31 33 35 39 43 47 55 57 63 65 70 82 90 96 100
mm 292 330 356 432 508 559 660 787 838 889 991 1092 1194 1397 1448 1600 1651 1778 2083 2286 2438 2540
L2 (RTJ) in 11.6 13.1 14.1 17.1 20.1 22.1 26.1 31.1 33.1 35.1 39.1 43.1 47.3 55.4 57.5 63.5 65.5 70.6 82.6 – – –
mm 295 333 359 435 511 562 663 790 841 892 994 1095 1200 1407 1461 1613 1664 1794 2099 – – –
H in 9.2 9.8 10.8 12.2 15.3 15.6 18.4 21.8 23.2 26 28.3 31.9 32.7 38.2 43.7 46.9 52.1 53.8 60.7 67 70.9 85.5
mm 233 249 274 311 389 397 467 554 589 660 719 811 831 971 1110 1192 1324 1367 1542 1702 1800 2171
WT(RF) kg 30 43 55 93 160 208 339 547 715 885 1310 1620 2120 3100 3800 4600 5500 6800 8100 8900 9900 11100
WT(BW) kg 21 35 43 64 115 145 256 375 589 694 932 1279 1702 2497 3100 3900 4700 6000 7200 8100 9800 10200

Class 900

NPS in 3” 4” 6” 8” 10” 12” 14” 16” 18” 20” 24” 26” 28” 30” 32” 36”
DN mm 80 100 150 200 250 300 350 400 450 500 600 650 700 750 800 900
L-L1 (RF-BW) in 15 18 24 29 33 38 40.5 44.5 48 52 61 65 69 73 77 84.9
mm 381 457 610 737 838 965 1029 1130 1219 1321 1549 1651 1753 1854 1956 2156
L2 (RTJ) in 15.1 18.1 24.1 29.1 33.1 38.1 40.9 44.9 48.5 52.5 61.7 65.9 69.9 73.9 – –
mm 384 460 613 740 841 968 1038 1140 1232 1333 1568 1673 1775 1876 – –
H in 11,9 12 16.7 20 22.9 25.6 27 33 33 36.4 36.7 44.1 54 59.9 65.8 71.7
mm 301 305 423 507 582 650 686 838 839 924 932 1121 1372 1521 1671 1821
WT(RF) kg 110 150 305 510 810 1120 1380 1900 3000 4000 5200 6600 7550 8850 10150 12750
WT(BW) kg 77 113 230 387 632 901 1139 1613 2650 3550 4650 5630 6420 7510 8600 10780

Class 1500

NPS in 2” 2 1/2” 3” 4” 6” 8” 10” 12” 14” 16” 18” 20” 24” 26” 28” 30”
DN mm 50 65 80 100 150 200 250 300 350 400 450 500 600 650 700 750
L-L1 (RF-BW) in 14.5 16.5 18.5 21.5 27.8 32.8 39 44.5 49.5 54.5 60.5 65.5 76.5 82 87.5 93
mm 368 419 470 546 705 832 991 1130 1257 1384 1537 1664 1943 2083 2222.5 2362
L2 (RTJ) in 14.6 16.6 18.6 21.6 28 33.1 39.4 45.1 50.2 55.4 61.4 66.4 77.6 – – –
mm 371 422 473 549 711 842 1000 1146 1276 1407 1559 1686 1972 – – –
H in 11.2 11.8 13.1 14.7 19.8 23.9 25.6 30.7 37.4 40.2 45.2 47.5 60.6 70.6 80.7 90.7
mm 284 300 332 373 502 608 649 779 950 1020 1147 1206 1539 1794 2049 2304
WT(RF) kg 70 100 150 245 550 1010 1476 2280 3060 4500 6100 8000 9800 11600 13400 15200
WT(BW) kg 50 77 115 190 452 750 1012 1780 2290 3500 5200 7500 8400 9300 10200 11100

Class 2500

NPS in 2” 2 1/2” 3” 4” 6” 8” 10” 12” 14” 16” 18” 20” 24”
DN mm 50 65 80 100 150 200 250 300 350 400 450 500 600
L-L1 (RF-BW) in 17.8 20 22.8 26.5 36 40.2 50 56 62 68 73.9 79.9 91.9
mm 451 508 578 673 914 1022 1270 1422 1575 1727 1877 2029 2334
L2 (RTJ) in 17.9 20.2 23 26.9 36.5 40.9 50.9 56.9 – – – – –
mm 454 514 584 683 927 1038 1292 1445 – – – – –
H in 16.4 16.5 17.4 18.9 20.1 28 33.5 39.4 47.2 51.2 55.1 59.1 63
mm 416 419 441 479 511 711 851 1000 1200 1300 1400 1500 1600
WT(RF) kg 145 240 330 650 806 2420 3750 5500 7400 9010 11200 12700 14000
WT(BW) kg 110 190 260 535 665 1980 2980 4350 6200 8250 9400 11890 13000

All technical data is subject to change without notice.