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Fakai Valve Factory Site: Yongxing Industrial Zone, Longwan District, Wenzhou City Tel: 0577-88767789
Fax: 0577-85983279
Mobile: 15958706338
Contact: Mr. Wang Email: 1552028357@qq.com
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API swing-type cast steel check valve

Structure of API Swing Cast Steel Check Valve
Structure of API Swing Cast Steel Check Valve

Scope of application

The flange-connected API swing-type cast steel check valve is suitable for pipelines of various working conditions such as petroleum, chemical and thermal power stations in the ANSI Class 150 ~ 600Lb and operating temperature ≤600 ℃. Applicable medium: water, oil, steam, etc.

Structural features

  1. The design and manufacture of the product meet the requirements of the American National Standard ANSIB16.34 and American Petroleum Institute Standard API16D.
  2. The valve disc is a swing-open type, the flow channel is straight through, and the horizontal pipeline and vertical pipeline can be installed.
  3. The rocker pin adopts a built-in structure, which reduces the disadvantages of external leakage.
  4. The valve body and bonnet are bolted, and the rating is higher than Class 600Lb under high pressure. The internal flange adopts an internal pressure self-sealing structure, which makes the product light in weight and reliable in sealing.

Manufacturing standards (fire, anti-static)

Types of Design and Manufacturing Structure length Flange size Pressure ~ temperature Test-inspection
Swing check valve Lift check valve ANSIB16.34
BS1868
ANS1B16.10 ANS1B16.5a ANS1B16.34 AP1598

Stress test

Nominal pressure Strength test Water seal test Hermetic seal test
MPa Lbf / in2 MPa Lbf / in2 MPa Lbf / in2
150 3.1 450 2.2 315 0.5 ~ 0.7 60 ~ 100
300 7.8 1125 5.6 815
600 15.3 2225 11.2 1630
900 23.1 3350 16.8 2440

Part material

case ASTM A216WCB ASTMA351 Cf8
Disc and bracket WCB CF8 CF8M Monel
Pin F6a F304 F316 Monel F304
Disc surface 13Cr 13Cr STL 304 STL 316 STL Monel 304 304 STL
Seat surface 13Cr STL STL 304 STL 316 STL Monel 304 STL STL
case ASTM A351 CF3 ADTM A351 CF8M ASTM A351 CF8
Disc and bracket
Pin F304L F316L F316
Disc surface 304L 304L STL 316 316 STL 316L 316L STL
Seat surface 304L STL STL 316 STL STL 316L STL STL

150Lb, 10K dimensions

size inch 2" 2-1 / 2 " 3 " 4 " 5 " 6 " 8" 10 " 12 " 14 " 16 " 18 " 20 " twenty four"
DN 50 65 80 100 125 150 200 250 300 350 400 450 500 600
L mm 203 216 241 292 330 356 495 622 699 787 914 978 978 1275
H mm 142 166 178 236 252 266 314 368 429 455 410 560 600 880

300Lb, 20K dimensions

size inch 2" 2-1 / 2 " 3 " 4 " 5 " 6 " 8" 10 " 12 " 14 " 16 " 18 " 20 " twenty four"
DN 50 65 80 100 125 150 200 250 300 350 400 450 500 600
L mm 267 292 318 356 400 444 533 622 711 838 864 978 1016 1346
H mm 165 185 205 228 250 275 325 378 410 480 530 575 630 860

400Lb overall dimensions

size inch 2" 2-1 / 2 " 3 " 4 " 5 " 6 " 8" 10 " 12 " 14 " 16 " 18 " 20 "
DN 50 65 80 100 125 150 200 250 300 350 400 450 500
L mm 292 330 356 406 457 495 597 673 762 889 902 1016 1054
H mm 190 203 229 267 292 330 381 406 457 528 546 597 635

600Lb overall dimensions

size inch 2" 2-1 / 2 " 3 " 4 " 5 " 6 " 8" 10 " 12 " 14 " 16 " 18 " 20 " twenty four"
DN 50 65 80 100 125 150 200 250 300 350 400 450 500 600
L mm 292 330 356 432 508 559 660 787 838 889 991 1092 1194 1397
H mm 203 229 235 286 292 330 381 457 584 835 684 752 975 1111

900Lb overall dimensions

size inch 2" 2-1 / 2 " 3 " 4 " 5 " 6 " 8" 10 " 12 " 14 " 16 "
DN 50 65 80 100 125 150 200 250 300 350 400
L mm 368 419 381 457 559 610 737 838 965 1029 1130
H mm 216 254 292 318 343 368 432 546 660 782 838

1500Lb overall dimensions

size inch 2-1 / 2 " 3 " 4 " 5 " 6 " 8" 10 " 12 " 14 " 16 "
DN 65 80 100 125 150 200 250 300 350 400
L mm 419 470 546 673 705 832 91 1130 1257 1384
H mm 193 246 288 324 373 466 536 857 950 1020