Full Bore Swing Check Valve -- Wafer SS316 API 594
Technical Datasheet -- Full-Bore Wafer Swing Check Valves for Horizontal Pipeline Service
Document No.SV-DATA-FBSCV-001
RevisionA
DateMay 2026
ManufacturerSupreme Valves India, Ahmedabad, Gujarat, India
Full-bore wafer swing check valves for horizontal pipeline service with unrestricted flow equal to pipe ID. Hinged disc swings open with low pressure drop and closes by gravity on flow reversal. Compact wafer or lug design fits between flanges. Bolted cover with renewable Stellite seat ring. Full bore allows pipeline pigging passage. API 594 / BS 1868 / ASME B16.34 compliant. SS316, WCB, or WC6 body.
Technical Specifications
| Parameter | Specification |
|---|
| Product Type | Full Bore Swing Check Valves |
| Category | Check Valves |
| Size Range | 2" to 48" (DN50 to DN1200) |
| Pressure Class | Class 150 / Class 300 / Class 600 / Class 900 per ASME B16.5 |
| End Connections | Wafer type (fits between flanges) or Lug type (through-bolted) per API 594 / ASME B16.5 |
| Body Material | ASTM A351 CF8M (SS316) / ASTM A216 WCB / ASTM A217 WC6 (high temp) |
| Disc Material | SS316 with Stellite 6 overlay / SS316 with ENP or chrome plating / SS316 solid disc (lightweight option) |
| Hinge Pin | SS410 / SS316 with Stellite bushing -- corrosion and wear resistant |
| Seat Material | SS316 with Stellite 6 overlay / renewable SS316 + Stellite seat ring |
| Bonnet Type | Bolted cover with spiral wound SS316/graphite gasket -- removable for disc and seat access |
| Face-to-Face | API 594 wafer pattern or manufacturer's standard (compact for wafer installation) |
| Orientation | Horizontal installation only (disc must swing freely with gravity) |
| Bore | Full bore (FB) equal to pipe ID -- zero flow restriction when open |
| Leakage Class | API 598 / EN 12266-1 -- metal seated standard leakage acceptable |
| Temperature Range | -29 deg C to +425 deg C (WCB/SS316) -- up to +540 deg C (WC6) |
Materials of Construction
| Component | Material |
|---|
| Stainless Steel | ASTM A351 CF8M (SS316) body, disc, hinge, and seat (corrosive / standard service) |
| Carbon Steel | ASTM A216 WCB body and disc (standard industrial) |
| Alloy Steel | ASTM A217 WC6, WC9 body and disc (high temperature > 425 deg C) |
| Seat Overlay | Stellite 6 on SS316 seat for erosion and wear resistance |
| Hinge Bushing | Stellite or bronze bushing on hinge pin for long wear life |
Testing & Inspection
| Test | Requirement |
|---|
| Testing | Hydrostatic shell test 1.5 x WP per API 598 / EN 12266-1; Seat leakage test per API 598 / EN 12266-1; Functional test -- full stroke, torque; Material certificates per EN 10204 3.1 |
| Certification | ISO 9001:2015 QMS, EN 10204 3.1 material certificates, hydrostatic and seat test reports |
Applicable Standards
| Standard | Description |
|---|
| Design Standard | API 594 Check Valves, BS 1868, ASME B16.34 |
Notes
- Install in horizontal pipelines only, with hinge pin at the top and flow direction matching the body arrow.
- For vertical pipeline installations, use piston check valve or dual-plate check valve instead.
- For high-temperature steam service (> 425 deg C), material upgrade to WC6 or WC9 body with Stellite seat overlay is required.
- For pigging service, confirm full-bore dimension matches the pipeline pig diameter.
- All valves are manufactured by Supreme Valves India as per our standard specifications.
