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API 602EN ISO 15761ASME B16.34
Forged-steel piston-lift check valves with spring-loaded discs for compact, high-pressure non-return service and a choice of screwed, welded or flanged ends.
| Size Range | 8mm–50mm (¼"–2") |
| Pressure Rating | Class 800–2500 |
| Testing | API 598 and EN 12266-1 |
| End Connections | NPT / BSP / BSPT screwed, ASME B16.11 socket weld, ASME B16.25 butt weld or flanged |
| Flow Direction | Uni-directional |
| Disc Spring | ASTM A312 Type 316 stainless steel |
| Production Capacity | Shared GGC line: 100,000 units/year |
| Category | Check |
Key Features
Engineered for Performance
- Spring-loaded piston-lift disc
- Bolted or welded cover
- Renewable seat ring
- Compact forged body
- Y-pattern Class 2500 option
- Fast response for dependable backflow prevention
Need custom specifications? Our engineering team can help you find the right solution.
Material Options
Typical Materials of Construction
| Body, bonnet & cover | ASTM A105; ASTM A182 F11, F22, F5, F9, F304 or F316 |
| Wedge / plug | ASTM A217 CA15 or ASTM A351 CF8 / CF8M |
| Disc, seat, stem & gland | ASTM A276 Type 410, 304 or 316 stainless steel |
| Packing & gasket | Braided graphite packing; spiral-wound 316 / 316L graphite-filled gasket on bolted designs |
| Bolting | ASTM A193 B7, B16, B8 or B8M studs with ASTM A194 2H, 7, 8 or 8M nuts |
| Check spring | ASTM A312 Type 316 stainless steel |
Final material selection depends on pressure, temperature, media and service conditions.
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Our engineering team works with you to specify, design, and deliver the exact valve solution your application demands.