Cast Steel Check Valve (BS 1868 / API 594)
Swing or dual-plate cast steel check for process and pipeline service
Cast steel check valve supplied from qualified manufacturers as a swing check to BS 1868 or a dual-plate / wafer check to API 594 — the non-return companion to an API 600 gate program. Swing checks suit full-flow pipeline and process lines; dual-plate wafer checks save length and weight between flanges. Dashpots or springs are added where slam is a concern. Production tests follow API 598.
Products are supplied to the stated API / ISO / ASME / AWWA standards from qualified manufacturers for projects in Saudi Arabia, including Dammam, Jubail, Yanbu, Riyadh, Jeddah and the Eastern Province. Certifications, monograms and listings are those of the manufacturing plant and are provided as specified in the purchase order.
Technical specifications
| Figure number | IV-6003 |
|---|---|
| Size range | 2″ – 36″ (DN50 – DN900) |
| Pressure rating | ASME Class 150 – 2500 |
| End connections | RF / RTJ flanged, wafer, lug or butt-weld |
| Typical materials | Body: ASTM A216 WCB, A352 LCC, A351 CF8M, duplex; disc and seat: 13Cr, F316, overlay as specified |
| Design standards | BS 1868 · API 594 · ASME B16.34 · ASME B16.10 |
| Certifications (per manufacturer) | API 598 production tests |
Key features
- Swing check (BS 1868) or dual-plate / wafer check (API 594)
- Bolted cover; renewable seat rings
- Optional dashpot, spring assist or counterweight
- Full-opening designs available for piggable lines
- Shell and seat tests to API 598
- NACE-compliant trim available for sour service
