Swing Check Valve
Design: BS 1868, API 6D, ASME B16.34 | Face-to-Face ASME B16.10 | Flanged ASME B16.5 / ASME B16.47 | Butt-weld ASME B16.25 | Test API 598
Body Materials: WCB, LCB, WC6, WC9, CF8, CF8M, duplex, etc.
Trim options: 13Cr, Stellite, 304, 316, Monel.
| NPS | L(RF) | H (open) | WT |
|---|---|---|---|
| 2″ | 203 | 175 | 14 |
| 4″ | 292 | 300 | 55 |
| 6″ | 356 | 380 | 96 |
| 8″ | 495 | 450 | 133 |
| 12″ | 698 | 540 | 345 |
Pressure Seal Swing Check
Design: BS 1868, API 6D | Pressure seal bonnet for high pressure service.
Materials: WCB, WC6, WC9, C5, C12; Trim 13Cr, Stellite.
| Class | NPS | L(RF) mm | WT kg |
|---|---|---|---|
| 900 | 6″ | 610 | 305 |
| 1500 | 8″ | 787 | 620 |
| 2500 | 6″ | 673 | 560 |
Dual Plate / Wafer Check
Design: API 594, API 6D | Wafer or lug type, spring assisted.
Materials: WCB, LCB, CF8M, duplex; Disc: SS or coated; Spring: SS, Inconel.
| Class | NPS | L (short) mm | WT kg |
|---|---|---|---|
| 150 | 4″ | 57 | 6.8 |
| 150 | 8″ | 70 | 32 |
| 300 | 6″ | 70 | 32 |
Forged Steel Lift Check
Design: API 602, BS 5352 | Bolted or welded cover, piston type disc.
Connections: SW, NPT, BW, Flanged (ASME B16.5).
| NPS | Class | L(SW) mm | WT kg |
|---|---|---|---|
| 1/2″ | 800 | 79 | 0.9 |
| 1″ | 800 | 108 | 2.3 |
| 2″ | 800 | 140 | 5.6 |
Cryogenic Check Valve
Extended bonnet, stainless steel / low carbon steel body, impact tested. For LNG, liquid nitrogen, oxygen.
Design: BS 1868 / API 6D, with cryogenic extensions.
Common References
▪ Design standards: BS 1868, API 6D, ASME B16.34, API 602, API 594
▪ Face‑to‑face: ASME B16.10, ISO 5752, DIN 3202
▪ Flange ends: ASME B16.5 (≤24″), ASME B16.47 (≥26″), JIS B2212, EN 1092-1
▪ Butt‑weld ends: ASME B16.25
▪ Socket weld / threaded: ASME B16.11 / ANSI B1.20.1
▪ Test: API 598, ISO 5208, BS EN 12266
▪ NACE MR0175 available.