Pressure Seal Check Valves

The Gold Standard in The Industry

YVI’s Cast Steel Pressure Seal Check Valves are crafted for high-pressure, high-temperature environments where robust performance is non-negotiable. With seal-welded seat rings and a unique disc anti-rotational device to prevent full rotation, these valves ensure a secure seal and longevity. YVI valves represent a synthesis of trusted traditional design and innovative customization options.

Pressure Seal Check Valve Optional Non-Slam Design Welded Disc Nut Pin Flange End Connections

PRESSURE SEAL Check Valve

Design Features

  • Seal Welded Seat Rings
  • Disc Anti-rotational Device to Prevent 360° Rotation
  • Disc Nut Pin is Welded

Optional Features

Optional Threaded Seat Ring
Optional Non-slam Design
  • Optional Threaded Seat ring
  • Optional Non-slam Design
Optional Internal Hing Pin or External Hinge Pin
Optional Live Loaded Cover Bolting
PRESSURE SEAL CHECK VALVE

YVI Cast Steel Pressure Seal Valves are designed, manufactured, and tested in accordance with ASME B16.34, API 594, MSS SP-144, and API 598. YVI offers size ranges from 2” through 48” diameters in pressure classes 600# through 2500# with end connections in either RFFE, RTJ, and Buttweld. Common materials of construction such as WCB, LCB, LCC, WC6, WC9, and C5 are all available along with other materials upon request. To assure 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+STL.6 ASTM A182 F316 ASTM A350 LF2+STL.6 ASTM A182 F22+STL.6 ASTM A105N+STL.6
3 Disc ASTM A216 WCB+Cr13 ASTM A351 CF8M ASTM A352 LCC+Cr13 ASTM A217 WC9+Cr13 ASTM A216 WCB+Cr13
4 Hinge ASTM A216 WCB ASTM A351 CF8M ASTM A352 LCC ASTM A217 WC9 ASTM A216 WCB
5 Washer Stainless Steel
Graphite		 Stainless Steel
Graphite		 Stainless Steel
Graphite		 Stainless Steel
Graphite		 Stainless Steel
Graphite
6 Pin ASTM A182 F6a ASTM A276 316 ASTM A276 304 ASTM A276 304 ASTM A276 410(NACE)
7 Disc Nut ASTM A276 410 ASTM A276 316 ASTM A276 304 ASTM A276 304 ASTM A276 410(NACE)
8 Lever Set Ring ASTM A276 410 ASTM A182 F316 ASTM A182 F304 ASTM A182 F304 ASTM A182 F6a(NACE)
9 Hing Pin ASTM A182 F6a ASTM A182 F316 ASTM A182 F304 ASTM A182 F304 ASTM A162 F6a(NACE)
10 Plate ASTM A276 410 ASTM A182 F316 ASTM A182 F304 ASTM A182 F304 ASTM A182 F6a(NACE)
11 Cover ASTM A105N ASTM A182 F316 ASTM A350 LF2 ASTM A182 F22 ASTM A105N
12 *Sealing Ring SS304 + Graphite SS316 + Graphite SS304 + Graphite SS304 + Graphite SS304 + Graphite
13 Spacer Ring ASTM A276 410 ASTM A182 F316 ASTM A182 F304 ASTM A182 F304 ASTM A276 420(NACE)
14 Bonnet Nut ASTM A194 2H ASTM A194 8 ASTM A194 7 ASTM A194 7 ASTM A194 2HM
15 Bolt ASTM A193 B7 ASTM A193 B8 ASTM A320 L7 ASTM A193 B16 ASTM A193 B7M

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 600

NPS in 2” 2 1/2” 3” 4” 5” 6” 8” 10” 12” 14” 16” 18” 20” 24” 26” 28” 30”
L(BW) in 7 8.5 10 12 15 18 23 28 32 – – – – – – – –
mm 178 216 254 305 381 457 584 711 813 – – – – – – – –
L1(RF) in 11.5 13 14 17 20 22 26 31 33 35 39 43 47 55 57 63 65
mm 292 330 356 432 508 559 660 787 838 889 991 1092 1194 1397 1448 1600 1651
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
mm 295 333 359 435 511 562 663 790 841 892 994 1095 1200 1407 1460 1613 1664
H in 9.5 10.4 10.6 125 15.7 15.7 23.1 23.9 27.4 28.7 28.8 295 32.3 37.4 39.4 43.3 47.3
mm 241.3 264.2 269.2 317.5 398.8 398.8 586.7 607.1 696 729 730.3 749.3 819.2 949.5 1000.3 1098.6 1200.2
WT(RF) kg 27 35 45 85 135 190 350 500 670 880 1150 1480 1880 2600 3100 3500 4000
WT(BW) kg 18 25 32 55 85 130 260 370 490 660 850 1100 1490 2040 2500 2800 3150

Class 900

NPS in 2” 2 1/2” 3” 4” 6” 8” 10” 12” 14” 16” 18” 20” 24” 26” 28” 30”
L(BW) in 8.5 10 12 14 20 26 31 36 39 43 48 52 61 63 67 71
mm 216 254 305 356 508 660 787 914 991 1092 1219 1321 1549 1600.2 1701.8 1803.4
L1(RF) in 14.5 16.5 15 18 24 29 33 38 40.5 44.5 48 52 61 65 69 73
mm 368 419 381 457 610 737 838 965 1029 1130 1219 1321 1549 1651 1752.6 1854.2
L2(RTJ) in 14.6 16.6 15.1 18.1 24.1 29.1 33.1 38.1 40.9 44.9 48.5 52.5 61.8 65.9 69.9 73.9
mm 371 422 384 460 613 740 841 968 1039 1140 1232 1334 1570 1673.9 1775.5 1877.1
H in 9.5 104 10.6 12.5 12.8 23.1 23.9 21 28.7 24.9 335 34 37.8 39.4 42.3 55.1
mm 241.3 264.2 269.2 317.5 325 586.7 607.1 533 729 633 850.9 863.6 958.9 1000.3 1073.2 1400.3
WT(RF) kg 42 55 58 110 242 599 893 1365 1628 1733 2300 3000 4100 4600 5200 6000
WT(BW) kg 21 32 34 68 168 462 725 1071 1281 1418 1850 2400 2900 3600 4000 4600

Class 1500

NPS in 2” 2 1/2” 3” 4” 6” 8” 10” 12” 14” 16” 18” 20” 24”
L(BW) in 8.5 10 12 16 22 28 34 39 42 47 53 58 77
mm 216 254 305 406 559 711 864 991 1067 1194 1346 1473 1956
L1(RF) in 14.5 16.5 18.5 21.5 27.8 32.8 39 44 49.5 54.4 60.5 65.5 76.5
mm 368 419 470 546 705 832 991 1130 1257 1384 1537 1664 1943
L2(RTJ) in 14.6 16.6 18.6 21.6 28.1 33.2 394 45.1 50.3 55.3 61.4 66.4 77.6
mm 371 422 473 549 711 842 1000 1146 1276 1407 1559 1686 1972
H in 9.5 10.4 11 14.3 13.3 17.7 20.2 25.4 28 29.5 34.63 37.38 43.25
mm 241.3 264.2 280 363 337 450 513 645.7 711.2 749.3 879.6 949.5 1098.6
WT(RF) kg 42 58 105 147 360 641 1103 1628 2205 2730 3300 4200 6000
WT(BW) kg 21 34 42 74 233 504 777 1155 1481 1680 2100 2600 3500

Class 2500

NPS in 2” 2 1/2” 3” 4” 6” 8” 10” 12” 14” 16” 18” 20” 24”
L(BW) in 11 13 14.5 18 24 30 36 41 44 49 55 61 68
mm 279 330 368 457 610 762 914 1041 1117.6 12446 1397 1549.4 1727.2
L1(RF) in 17.8 20 22.8 26.5 36 40.3 50 56 – – – – –
mm 451 508 578 673 914 1022 1270 1422 – – – – –
L2(RTJ) in 17.9 20.3 23 26.9 36.5 40.9 50.9 56.9 – – – – –
mm 454 514 584 683 927 1038 1292 1444 – – – – –
H in 95 104 11.9 12.5 17.8 22 22.7 25.8 33.9 35.4 39.4 45.3 55.1
mm 243.8 264.2 303 317.5 452.1 558.8 576.6 655.3 860.6 898.7 1000.3 1149.4 1400.3
WT(RF) kg 89 124 163 299 588 1071 1676 2772 – – – – –
WT(BW) kg 53 74 89 142 286 598 783 1512 2450 3200 4050 5000 7200

All technical data is subject to change without notice.