1/2” 4500LB Open-die Forging Steel Globe Valve
Description
TECHNICAL DATA SHEET: GLOBE VALVE
Size: ½” (DN 15)
Pressure Class: 4500 LB (ASME B16.34)
Design Code: ASME B16.34 / BS 1873 / API 623
1. MATERIALS OF CONSTRUCTION
| Component | Material Specification | Details |
|---|---|---|
| Body & Bonnet | ASTM A105 | Carbon Steel Forging |
| Disc | ASTM A105 + Stellite 6 | Carbon Steel + Hardfaced Seat |
| Stem | ASTM A182 F6a (Gr. 410) | Martensitic Stainless Steel |
| Seat | Stellite 6 Overlay | Weld Overlay on Body Seat |
| Stem Nut | ASTM A439 D2 / Bronze | Dura-Bar Cast Iron or Bronze |
| Gasket | Spiral Wound (SS316/F.Graphite) | Flexible Graphite + Metal Core |
| Bolting | ASTM A193 B7 + A194 2H | Alloy Steel Studs & Nuts |
| Packing | Flexible Graphite | High-Temperature Grade |
| Handwheel | Ductile Iron (ASTM A536) | Crush-Proof Design |
2. DESIGN FEATURES
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Type: Bolted Bonnet Globe Valve
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Flow Direction: Flow Under Disc (Standard)
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Stem Design: Rising Stem, Non-Rotating
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Seating: Metal-to-Metal (Stellite 6 Hardfaced Disc & Seat)
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Bonnet Joint: Bolted Flange (RF) or Pressure Seal (Confirm)
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Packing System: Live-loaded gland with anti-extrusion rings
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Leakage Class: API 598 Class IV (Standard) / Class V (Optional)
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Fire Safe: API 607 / API 6FA Compliant (Inherent for Metal Seats)
3. END CONNECTIONS
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Type: Butt Weld (BW)
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Standard: ANSI B16.25
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Bevel: Prepared for Schedule 160/XXS Pipe
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Weld Prep: 37.5° bevel with 1/16″ (1.6mm) root face
4. OPERATION & TESTING
| Parameter | Specification |
|---|---|
| Operator | Handwheel (Manual) |
| Stem Travel | Linear (Rising Indicating) |
| Shell Test | 6,750 psi (1.5x Rating) |
| Seat Test | 4,950 psi (1.1x Rating) |
| Backseat Test | 4,950 psi (1.1x Rating) |
| Test Medium | Water (Shell), Air/Water (Seat) |
5. STANDARDS COMPLIANCE
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Design & Pressure: ASME B16.34
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Face-to-Face: ASME B16.10 (Class 4500)
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Testing: API 598
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Welding: ANSI B16.25
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Fire Safe: API 607 (if soft-seated components exist)
6. APPLICATIONS
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Services: High-Pressure Steam, Power Generation, Refining, Petrochemicals
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Media: Water, Steam, Oil, Gas, Non-corrosive Fluids
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Temp Range: -29°C to +425°C (A105 Limit)
7. NOTES
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Bonnet Design: Class 4500 typically uses Pressure Seal Bonnet for optimal sealing. Confirm if Bolted Flange is acceptable.
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Stellite Hardfacing: Applied to disc face and body seat for erosion/abrasion resistance.
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Stem Protection: Stem tip optionally hardfaced with Stellite 6 for wear resistance.
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Flow Direction: Globe valves are directional. Confirm flow arrow alignment.
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Optional: Locking device, stem extension, gear operator (for high thrust).
