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CX cast steel swing check valves are widely used in the industries of oil, chemical, medicine-made, fertilizer, city construction, etc. The swing type check valve is designed as full bore full open structure in order to clean the pipeline; large size check valve can be designed as buffering damp structure in order to protect seat seal surface and reduce the damage of pipeline at water hammer status. Seat seal surface overlaid with wearing resistant hardened alloy to be matched with disc seal surface; the stem is specially treated to ensure its strength, rigidity, corrosion resistance and abrasion resistance. Valves are available in a complete range of body/bonnet materials and trims, which are widely used for the medium of water, steam, oil product, nitric acid, acetic acid, oxygenation, etc.
ANSI swing check valve main features
Bolted cover, swing type disc
Threaded or welded seat ring
ASTM A216 WCB,A217 WC6,A351CF8,A351CF8M,
A351 CF3,A351 CF3M,A351 CN7M
Applicable Standard
Design Standard: BS 1868, ASME B16.34, API 6D, DIN2533
Face to Face: ASME B16.10, API 6D, EN 558, DIN 3202
End Flange: ASME B16.5, ASME B16.47, DIN2501, DIN2533
Buttwelding Ends: ASME B16.25, DIN3239
Inspection and Test: API 598, DIN3230
ANSI swing check valve Materials list
| Design & Manufacture | BS 1868-1873, ASME B16.34, API 6D |
| Inspection & Test | API 598, API 6D |
| End Flange Dimension | ASME B16.5 |
| End Flange Dimension | ASME B16.47A, MSS SP-44 |
| End Flange Dimension | ASME B16.47B, API 605 |
| BW End Dimension | ASME B16.25 |
| Face to Face | ASME B16.10 |
| Pressure-temperature Ratings | ASME B16.34 |
| Wall Thickness Dimension | API 600 and BS 1868 |
| Trim Code | Seat Ring Surface Part No. 2 | Wedge Surface Part No. 3 | Stem Part No.4 | Backseat Part No. 9 |
| 1 | F6 | F6 | F6 | F6 |
| 2 | F304 | F304 | F304 | F304 |
| 5 | Stellite | Stellite | F6 | F6 |
| 8 | Stellite | F6 | F6 | F6 |
| 9 | Monel | Monel | Monel | Monel |
| 10 | F316 | F316 | F316 | F316 |
| 13 | Alloy 20 | Alloy 20 | Alloy 20 | Alloy 20 |
| Parts Name | Carbon Steel to ASTM | Alloy Steel to ASTM | Stainless Steel to ASTM | |||||||||||
| 1. | Body | A216 WCB | A352 LCB | A217 WC1 | A217 WC6 | A217 WC9 | A217 C5 | A351 CF8 | A351 CF8M | A351 CF3 | A351 CF3M | |||
| 11. | Cover | A216 WCB | A352 LCB | A217 WC1 | A217 WC6 | A217 WC9 | A217 C5 | A351 CF8 | A351 CF8M | A351 CF3 | A351 CF3M | |||
| 3. | Disc | A216 WCB | A352 LCB | A217 WC1 | A217 WC6 | A217 WC9 | A217 C5 | A351 CF8 | A351 CF8M | A351 CF3 | A351 CF3M | |||
| 4. | Hinge | A216 WCB | A352 LCB | A217 WC1 | A217 WC6 | A217 WC9 | A217 C5 | A351 CF8 | A351 CF8M | A351 CF3 | A351 CF3M | |||
| 9. | Bolt | A193 B7 | A320 L7 | A193 B7 | A193 B16 | A193 B16 | A193 B16 | A 193 B8 | A 193 B8 | A 193 B8 | A 193 B8 | |||
| 8. | Nut | A194 2H | A194 4 | A194 2H | A194 4 | A194 4 | A194 4 | A194 8 | A194 8 | A194 8 | A194 8 | |||
| 5. | Disc Nut | A194 2H | 410 | 410 | 410 | 410 | 410 | 304 | 316 | 304L | 316L | |||
| 10. | Gasket | SS Spiral Wound W/graphite, or SS Spiral Wound W/PTFE, of Reinforced PTFE | ||||||||||||
| 12. | Eye Bolt | Steel | ||||||||||||
| 7. | Yoke | A216 WCB | A352 LCB | A217 WC1 | A217 WC6 | A217 WC9 | A217 C5 | A351 CF8 | A351 CF8M | A351 CF3 | A351 CF3M | |||
 | No | Part Name | Carbon steel | l1/4cr-1/2mo | Carbon Steel |
1 | Body | A216-WCB | A217-WC6 | A352-LCB | |
2 | Cover | A216-WCB | A217-WC6 | A352-LCB | |
3 | Disc | A105+13Cr | A182-F11+HF | A350-LF2+CR13 | |
4 | Hinge | A216-WCB | A217-WC6 | A352-LCB | |
5 | Fork Part | A216-WCB | A217-WC6 | A352-LCB | |
6 | Seat Ring | A105+CR13 | A182-F11+HF | A350-LF2+CR13 | |
7 | Hinge Pin | A276-420 | A276-304 | A276-420 | |
8 | Disc Washer | Carbon Steel | A276-304 | Carbon Steel | |
9 | Disc Nut | Carbon Steel | A194-7 | Carbon Steel | |
10 | Disc Nut Pin | Carbon Steel | A276-420 | Carbon Steel | |
11 | Gasket | Spiral Wound(Graphite+304) | |||
12 | Stud | A193-B7 | A193-B16 | A320-L7 | |
13 | Stud Nut | A194-2H | A194-7 | A194-4 | |
14 | Eyebolt(2) | Carbon steel | |||
Note:
l) Cast steel disc for NPS 4" and above.
2) NPS 6" & larger.
3) Disc and seat ring may either be solid facing material or a base material equal to or better than the body/bonnet material with facing as shown.
ANSI swing check valve dimension and weight
ANSI swing check valve dimension and weight（150lb）
ANSI swing check valve dimension and weight（300lb）
ANSI swing check valve dimension and weight（600lb）
ANSI swing check valve dimension and weight（900lb）
