API 600 vs API 602 vs API 603
| Parameter | API 600 (Forged Steel Gate Valves) | API 602 (Compact Forged Valves) | API 603 (Corrosion-Resistant Valves) |
|---|---|---|---|
| Primary Scope | Standard-Bore Forged Gate Valves | Small Bore (NPS≤4") Specialty | Corrosion-Resistant Focus |
| Valve Types | Gate (Primary), Globe, Check | Gate, Globe, Check, Ball | Gate, Globe, Check |
| Size Range | NPS ½"~24" (DN15~600) | NPS ¼"~4" (DN8~100) | NPS ½"~24" (DN15~600) |
| Body/Bonnet Join | Flanged, Welded, Threaded | Threaded/Socket Weld (Compact) | Flanged, Welded |
| Key Features | Bolted Bonnet OS&Y/OSY Design |
Monobloc Body No External Leak Path |
Full Welded Pressure Boundary Zero External Leak |
| Pressure Rating | Class 150~2500 | Class 800~4500 | Class 150~1500 |
| Target Service | High-Temp Steam, Hydrocarbons | Instrumentation, Sample Points | Corrosives (Acids, Caustics) |
| Corrosion Control | Optional SSC Resistance | Optional SSC Resistance | Mandatory L-Grade SS (316L/904L) |
| Sealing Tech | Stem Packing (External Leak Possible) | Metal Bellows Seal (Zero Leak) | Welded Pressure Envelope (Zero Leak) |
| Critical Caution | ❌ Avoid Toxic/Corrosive Media | ❌ Not for NPS>4" Lines | ❌ Overkill for Non-Corrosive Service |
API 600 / API 602 / API 603 valve in stock
