API CAST STEEL VALVES : PRESSURE SEALING SWING CHECK VALVES
A. PRESSURE SEALING SWING CHECK VALVES BRIEF FIGURE OF STRUCTURE
Pressure Sealing Swing Cheek Valves Class 600Lb~2500Lb
Pressure Sealing Swing Cheek Valves Class 600Lb~2500Lb
  1. pressure sealing cover, swing type disc
  2. Threaded or welded seat ring
  3. ASTM A216 WCB, A217 Wc6, A351 Cf8, A351 CF8M
  4. A351 Cf3, A351 CF3M,A351 CN7M

B. PRESSURE SEALING SWING CHECK VALVES STANDARDS COMPLIANCE
  1. Design and Manufacture: ANSIB16.34, API 6D, BS1868
  2. Face to face (end to end): ANSIB16.10, API 6D
  3. Flanged connection: 2~~24~to ANSIB16.5
  4. Butt welded end: ANSIB16.25
  5. Test and inspection: API 598, API 6D
  6. Back up ring: Absorbs thrust applied by internal pressure.
  7. Thrust ring: Protects the soft metallic gasket from detonations.
  8. Gasket Unique angular design provides superior sealing.

C. PRESSURE SEALING SWING CHECK VALVES MAIN PARTS AND MATERIALS
Materials List
NO. Part name Material
16 Split pin Stainless steel
15 Washer Stainless steel
14 Disc pin CS/SS
13 Hinge pin CS/SS
12 Seat ring CS+SS/SS/SS+STL(see body materials)
11 Disc CS+SS/SS/SS+STL(see body materials)
NO. Part name WCB LCB WC6 WC9
10 Yoke stud&nut A193GrB7/A194Gr2H A320GrL7/A194Gr4 A193 Gr B16/A194Gr4/7 A193 Gr B16/A194Gr4/7
09 Cover stud&nut A193GrB7/A194Gr2H A320GrL7/A194Gr4 A193 Gr B16/A194Gr4/7 A193 Gr B16/A194Gr4/7
08 Gasket Soft iron Soft iron SS304 SS304
07 Thrust ring A182 F6a A182 F304 A182 F11 A182 F22
06 Back up ring A182 F6a A182 F304 A182 F11 A182 F22
05 Yoke A216 Gr WCB A352 Gr LCB A217 Gr WC6 A217 Gr WC9
004 Hinge A216 Gr WCB A352 Gr LCB A217 Gr WC6 A217 Gr WC9
03 Cover A216 Gr WCB A352 Gr LCB A217 Gr WC6 A217 Gr WC9
02 Bonnet A216 Gr WCB A352 Gr LCB A217 Gr WC6 A217 Gr WC9
01 Body A216 Gr WCB A352 Gr LCB A217 Gr WC6 A217 Gr WC9
NO. Part name C5 LCB WC6 WC9
10 Yoke stud&nut A193GrB16/A194Gr4/7 A193GrB16/A194Gr4/7 A193GrB7/A194Gr2H A193GrB7/A194Gr2H
09 Cover stud&nut A193GrB16/A194Gr4/7 A193GrB16/A194Gr4/7 A193GrB7/A194Gr2H A193 Gr B7/A194Gr2H
08 Gasket SS304 SS304 SS304 SS316
07 Thurst ring A182 F5 A182 F22 A182 F304 A182 F316
06 Back up ring A182 F5 A182 F22 A182 F304 A182 F316
05 Yoke A217 Gr C5 A217 Gr C15 A351 Gr CF8 A351 Gr CF8M
004 Hinge A217 Gr C5 A217 Gr C15 A351 Gr CF8 A351 Gr CF8M
03 Cover A217 Gr C5 A217 Gr C15 A351 Gr CF8 A351 Gr CF8M
02 Bonnet A217 Gr C5 A217 Gr C15 A351 Gr CF8 A351 Gr CF8M
01 Body A216 Gr WCB A217 Gr C15 A351 Gr CF8 A351 Gr CF8M
Higher sizes are with dashpot arrangement to control the movement of the disc order to avoid slamming and water hammer.

D. PRESSURE SEALING SWING CHECK VALVES MAIN CONNECTION DIMENSIONS AND WEIGHTS
Dimensions
Class 600
Size inch 2 2-1/2 3 4 5 6 8 10 12 14 16 18 20
L,L1 mm 292 330 355 431 508 558 660 787 838 889 991 1092 1194
L1-SP mm 178 216 245 304 381 457 584 711 812 889 991 1092 1194
H mm 240 265 275 325 370 425 500 555 610 725 755 850 925
WT.(approx) Kg 20 38 45 45 95 125 220 330 505 595 800 1150 1600
Dimensions
Class 900
Size inch 2 2-1/2 3 4 5 6 8 10 12 14 16 18
L,L1 mm 368 419 381 457 559 609 736 838 965 1029 1130 1219
L1-SP mm 368 254 305 355 432 508 660 787 914 991 1092 1219
H mm 250 580 290 335 380 440 510 570 620 730 790 860
WT.(approx) Kg 44 57 75 105 140 230 440 590 870 1085 1225 1700
Dimensions
Class 1500
Size inch 2 2-1/2 3 4 5 6 8 10 12 14 16
L,L1 mm 368 419 470 546 673 705 832 991 1130 1257 1384
L1-SP mm 216 254 305 406 483 559 711 864 991 1067 1194
H mm 265 295 310 345 385 460 515 590 645 765 800
WT.(approx) Kg 65 72 80 125 160 300 525 960 1130 1450 2100
Dimensions
Class 2500
Size inch 2 2-1/2 3 4 5 6 8 10 12
L,L1 mm 451 508 578 673 794 914 1022 1270 1422
L1-SP mm 279 330 368 457 533 610 762 914 1014
H mm 280 310 325 370 425 500 525 630 695
WT.(approx) Kg 78 95 110 205 395 495 900 1300 1950
Gear operation suggested. Dimensions depend on request. Abbreviation: SP-Short pattern.

The technical data subject to amend without notice