Class 1500 Die-Forged PSB Globe Valve (ASME B16.34)
Description
Class 1500 Die-Forged PSB Globe Valve (ASME B16.34)
I. GENERAL SPECIFICATIONS
| Parameter | Technical Requirement | |
|---|---|---|
| Valve Type | Globe Valve (Stop-Check Optional) | |
| Bonnet Type | Self-Sealing Bonnet (Pressure Seal Design) | |
| Design Standard | ASME B16.34, API 623 | |
| Size Range (NPS) | 2″ to 24″ | |
| Pressure Class | ASME 1500 LB | |
| Temperature Range | -29°C to 593°C (-20°F to 1100°F) | |
| End Connections | • Butt Weld (ASME B16.25) • Flanged (ASME B16.5 Class 1500) |
|
| Face-to-Face | ASME B16.10 Class 1500 | |
| Body Material | Forged Steel (ASTM A182) |
II. CONSTRUCTION MATERIALS
| Component | Material Standard | Grade/Details | |
|---|---|---|---|
| Body & Bonnet | ASTM A182 | F22 / F91 / F316 (Forged) | |
| Bonnet Seal | Self-Energizing Seal | Inconel Pressure Seal Ring | |
| Stem | ASTM A182 | F6a (13Cr) or F316 | |
| Seat & Disc | Stellite Overlay | #6 or #21 Alloy |
III. SELF-SEALING BONNET MECHANISM
| Feature | Technical Principle |
|---|---|
| Sealing Method | Pressure-Actuated Self-Energizing • System pressure compresses seal ring against bonnet groove • Sealing force ↑ as pressure ↑ (Zero leakage >600 PSI) |
| Seal Ring | Inconel 600/625 (Conical Section) |
| Gasket | Not Required (Seal ring replaces gasket) |
| Advantage | Eliminates bolt re-torquing in high-temperature service |
IV. PERFORMANCE DATA
| Feature | Specification | |
|---|---|---|
| Bonnet Leakage | ASME B16.34 Class A (Zero detectable leak) | |
| Seat Leakage Class | Class IV (Standard), Class VI (Optional) | |
| Fire-Safe Rating | API 607 Certified |
V. APPLICATIONS
► High-Pressure Systems (>100 bar) where thermal cycling causes bolt relaxation
► Power plant steam headers & turbine inlets
► Refinery hydrocracker units
TECHNICAL HIGHLIGHTS
-
🔥 SELF-SEALING BONNET: Pressure-energized seal ensures zero leakage at 593°C/1100°F without bolt re-tightening
-
⚙️ NO GASKET FAILURE RISK: Metallic seal ring replaces conventional gaskets
-
📈 AUTOMATIC SEALING FORCE: Sealing pressure increases proportionally with system pressure
