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Check Valve API 594
CHECK VALVE
API 594
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API 594 Check Valve
Swing Check Valve API 594
API Std 594, Check Valves: Flanged, Lug, Wafer, and Butt-welding, is a standard developed and published by the American Petroleum Institute (API) that covers the design, materials, face-to-face dimensions, pressure-temperature ratings, and examination.
Swing check valves are designed to close quickly and automatically with positive shut off in either horizontal or vertical (flow up) pipe runs. Inherently, swing check valves have a low pressure drop and are best suitable for velocity applications.
Check Valve Pressure Rating
- Check Valve API 594 Class 150
- Check Valve API 594 Class 300
- Check Valve API 594 Class 600
- Check Valve API 594 Class 900
- Check Valve API 594 Class 1500
Check Valve API 594 Features
- API 6A and 6D pressure classes.
- ASME Pressure Class 125 through 2500.
- Integral and overlaid metal seats also available.
- Wafer, lug, double flanged and extended body styles.
- DIN, JIS, BS, AS, and ISO standards are also available.
- Configurations available in retainered and retainerless style.
- End Connections: Raised Face, Plain Face, Ring Joint, Weld-End, Hub-End.
| APPLICABLE STANDARDS | |
|---|---|
| General Design | API 594 Type B |
| Wall Thickness | API 594 Type B |
| Pressure-temperature | ASME B16.34 |
| Face to Face | ASME B16.10 |
| Flange Design | ASME B16.5 |
| Butt Welding Ends | ASME B16.25 |
| Materials | ASTM |
| DESIGN FEATURES | |
|---|---|
| Lightweight and Compact Wafer | |
| Dual Plate, Flat Seat Design | |
| Independent Spring Action | |
| Body Strength and Rigidity | |
| Vertical Hinged Design | |
| Simple External Body Geometry | |
| Wide Variety of Materials | |
Detail Specification
| Body | A216 WCC |
| Bonnet | A105 |
| Seat | 410 + HF |
| Arm | A216 WCC |
| Disc | A216 WCC + 316 |
| Shaft | 316 SS |
| End Cap | A105 |
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