Globe Valve Open Die Forged -2″ 4500LB BW
Description
Forged Steel Globe Valve – 2″ 4500LB BW, A105N Body, Stellite 6 Trim
Model: GGV-FORG-A105N-2-4500-BW
Product Description: Open die forged, bolted bonnet, outside screw and yoke (OS&Y) globe valve with butt weld ends. Manufactured from ASTM A105N forged carbon steel with Stellite 6 hardfaced seating surfaces, designed for high-pressure, high-temperature isolation and throttling services up to Class 4500.
1. Main Design Codes and Standards
| Item | Standard / Code |
|---|---|
| Valve Design & Manufacturing | ASME B16.34, API 602 |
| Face-to-Face | ASME B16.10 Long Pattern (or Manufacturer’s Standard) |
| Butt Weld Ends | ASME B16.25 |
| Pressure-Temperature Ratings | ASME B16.34, Material Group 1.1 (A105N) |
| Testing & Inspection | API 598, ISO 5208 |
| Marking | MSS SP-25 |
2. Main Technical Parameters
| Parameter | Specification |
|---|---|
| Nominal Size | 2″ (DN50) |
| Pressure Class | Class 4500 (PN720) |
| End Connection | Butt Weld (BW), per ASME B16.25, schedule matching pipe |
| Body Construction | Bolted bonnet, OS&Y, rising stem, outside screw |
| Disc Type | Plug-type disc, guided |
| Seating Surfaces | Stellite Grade 6 hardfaced (disc and seat ring) |
| Operation | Direct handwheel (gear operator optional) |
| Flow Direction | “Low inlet” – flow under disc (standard) |
3. Pressure-Temperature Ratings (ASME B16.34, Group 1.1 – A105N, Class 4500)
| Temperature (°C) | Max. Working Pressure (bar) | Approx. psi |
|---|---|---|
| -29 to 38 | 310.3 | 4500 |
| 100 | 294.1 | 4265 |
| 200 | 280.3 | 4065 |
| 300 | 264.4 | 3835 |
| 400 | 246.8 | 3580 |
| 450 | 228.9 | 3320 |
| 500 | 209.6 | 3040 |
| 538 | 184.4 | 2675 |
Note: A105N carbon steel is suitable for continuous operation up to 425 °C (800 °F). Higher temperature ratings are for non-continuous or intermittent service per ASME B16.34. Graphite packing and gaskets allow full rated pressure to 538 °C.
4. Materials of Main Parts
| No. | Part Name | Material | Remarks |
|---|---|---|---|
| 1 | Body | ASTM A105N | Open die forged carbon steel, fully normalized |
| 2 | Bonnet | ASTM A105N | Bolted design, normalized |
| 3 | Disc (Plug) | ASTM A105N | Seating face hardfaced with Stellite Gr.6 |
| 4 | Seat Ring | ASTM A105N + Stellite Gr.6 overlay | Renewable, threaded or welded-in |
| 5 | Stem | ASTM A276 Type 410 (13Cr) or A182 F6a | Polished, with backseat shoulder |
| 6 | Packing | Graphite with 316 SS wire reinforcement | High-temperature, low emission |
| 7 | Bonnet Gasket | SS304 / Graphite Spiral Wound | With inner and outer rings |
| 8 | Gland / Gland Flange | Carbon Steel / A276 410 | |
| 9 | Yoke | Carbon Steel (A216 WCB or similar) | Integral or bolted |
| 10 | Bolting (Body & Bonnet) | ASTM A193 B7 / A194 2H | High-strength alloy steel |
| 11 | Handwheel | Ductile Iron / Carbon Steel | Keyed and fastened to stem nut |
5. Dimensions & Weight – 2″ Class 4500 BW (Typical)
| Parameter | Dimension (mm) | Remarks |
|---|---|---|
| Face-to-Face (L) | 368 | Per ASME B16.10 Long Pattern for Class 4500 Globe Valve |
| Centerline to Handwheel Top (H) | Approx. 560 | Fully open |
| Handwheel Diameter (D) | Approx. 350 | |
| Weld End Bore (ID) | To match Sch. XXS / Sch. 160 pipe | Typically 38 mm ID for Sch. XXS 2″ |
| Weld End Outside Dia. | As per matching pipe OD | Transition per ASME B16.25 |
| Approx. Weight | 45 kg |
Exact dimensions, weld end preparations, and certified outline drawings are available upon request.
6. Performance Testing
| Test Item | Test Medium | Test Pressure | Acceptance Criteria |
|---|---|---|---|
| Shell Hydrostatic | Water | 465.5 bar (1.5 × rated WP at 38 °C) | No visible leakage or deformation |
| High-Pressure Seat Test | Water | 341.3 bar (1.1 × rated WP) | API 598 Rate A (metal-seated) |
| Low-Pressure Seat Test | Air / Nitrogen | 6 bar (87 psi) | Leakage rate per API 598 for metal seats |
| Backseat Test | Water | 341.3 bar | No leakage at packing |
7. Design Features
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Open Die Forged Body: The body and bonnet are manufactured from open die forgings, ensuring superior grain flow, structural integrity, and absence of internal defects compared to castings. Ideal for extreme high-pressure service.
-
Stellite 6 Trim: Both the disc seating face and the renewable seat ring are hardfaced with Stellite Gr.6, providing exceptional resistance to galling, erosion, and wear at high temperatures.
-
OS&Y Rising Stem: The outside screw and yoke design ensures the stem threads are isolated from the process fluid and can be easily lubricated. The rising stem gives a clear visual indication of valve position.
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Backseat Function: The stem incorporates a backseat shoulder that seals against the bonnet when the valve is fully open, protecting the packing from pressure and allowing packing replacement under pressure.
-
Butt Weld Ends: Provide a permanent, leak-tight connection with no potential external leakage path, suited for high-pressure piping requiring full penetration welds.
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Guided Disc: The plug disc is guided in the bonnet, ensuring accurate alignment with the seat and preventing vibration damage during throttling.
8. Application Scope
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Suitable Media: High-pressure steam, boiler feedwater, condensate, oil, gas, and other hydrocarbons compatible with carbon steel and Stellite.
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Temperature Range: -29 °C to +425 °C continuous (up to +538 °C intermittent).
-
Industries: Power generation (boiler circuits, superheaters), petrochemical, oil & gas (wellhead manifolds, high-pressure injection lines), and general heavy industrial high-pressure processes.
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Key Advantages:
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Robust forged construction handles extreme pressure safely.
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Stellite hardfaced trim extends service life under severe conditions.
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Can be used for both isolation and throttling (intermediate positions).
-
9. Optional Configurations & Accessories
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Gear Operator: Bevel gearbox for easier operation at high differential pressures.
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Actuation: ISO 5211 mounting pad (adaptor) for pneumatic or electric actuators.
-
Seat Material Alternatives: Stellite Gr.12, Tungsten Carbide, or 13Cr for different service conditions.
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Stem & Trim Materials: A182 F304/F316, Monel, Inconel 625 for corrosive or low-temperature services.
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End Connections: Flanged (RTJ or RF), Socket Weld, or Hub ends.
-
Live-Loaded Packing: Spring-loaded gland for constant packing compression through thermal cycles.
-
Locking Device: Handwheel lockable in open/closed position.
-
Position Indicator: Additional visual or electrical limit switches.
Disclaimer: This technical data sheet is for engineering reference and selection purposes only. All exact dimensions, ratings, material certifications (EN 10204 Type 3.1/3.2), and performance data must be confirmed against the manufacturer’s final certified documentation and approved drawings before procurement or installation.
