1″-4500LB-BW Close Die Forged Globe Valve
Description
TECHNICAL DATA SHEET
1″-4500LB-BW Close Die Forged Globe Valve
| Item | Description |
|---|---|
| Product Name | 1″ Class 4500 Butt Weld Close Die Forged Globe Valve |
| Model | 1″-4500LB-CDF-GLOBE |
| Nominal Size | 1 inch (DN25) |
| Pressure Class | Class 4500 LB |
| Construction | Close die forged body / OS&Y rising stem / Straight pattern or Y‑pattern (optional) |
| End Connection | Butt weld (BW) per ASME B16.25 |
| Body Material | To be specified (Options: A105 carbon steel / F22 / F91 / F304/F316 stainless steel, etc.) |
| Service Condition | High‑temperature, high‑pressure, high‑erosion environments; power plant and petrochemical isolation / shut‑off |
I. Design Basis
| Parameter | Standard / Description |
|---|---|
| Valve Design Standard | ASME B16.34 / API 602 / BS 1873 / API 623 / JB/T 3595 |
| Face‑to‑Face Standard | ASME B16.10 / Manufacturer standard |
| End Connection Standard | ASME B16.25 (butt weld ends) |
| Inspection & Testing Standard | API 598 / JB/T 9092 |
| Pressure‑Temperature Rating | Per ASME B16.34, Material Group 2 |
| Material Standards | ASTM A105 / A182 / A194 / A193, etc. |
II. Technical Specifications
| Parameter | Description |
|---|---|
| Valve Type | Globe valve, close die forged, OS&Y rising stem |
| Bonnet Type | Pressure seal or bolted bonnet |
| Flow Pattern | Straight pattern or Y‑pattern (45° angle for reduced flow resistance) |
| Working Pressure | Up to Class 4500 LB (approx. 76.0 MPa / 11,000 PSI) |
| Suitable Media | Water, steam, oil, gas, non‑corrosive fluids |
| Temperature Range | Depends on body material: – A105 carbon steel: -29°C ~ +425°C – Alloy steel: -29°C ~ +540°C – Stainless steel: -196°C ~ +650°C |
| Operation | Handwheel (standard) / electric actuator / pneumatic actuator (optional) |
| Flow Direction | Flow under disc (standard) |
| Sealing Type | Metal‑to‑metal (Stellite hardfacing) |
| Leakage Class | API 598 Class IV (standard) / Class V (optional) |
| Fire Safe Design | Compliant with API 607 / API 6FA (inherent for metal seats) |
III. Bill of Materials (Typical Options)
| Part Name | Carbon Steel Series | Alloy Steel Series | Stainless Steel Series |
|---|---|---|---|
| Body / Bonnet | ASTM A105 forged | ASTM A182 F22 / F91 / 12Cr1MoV | ASTM A182 F304 / F316 |
| Disc | A105 + Stellite | F22 / 25Cr2MoV + Stellite | F316 + Stellite |
| Seat | A105 + Stellite | 304 + Stellite | F316 + Stellite |
| Stem | ASTM A182 F6a (13Cr) | 25Cr2MoV / 1Cr17Ni2 | ASTM A182 F316 |
| Stem Nut | Aluminium bronze / Ni‑resist | Aluminium bronze / Ni‑resist | Aluminium bronze / Ni‑resist |
| Packing | Flexible graphite (Ni wire reinforced) | Flexible graphite | Flexible graphite / PTFE |
| Body Gasket | SS + graphite spiral wound | SS + graphite spiral wound | SS + graphite spiral wound |
| Pressure Seal Ring | Flexible graphite + SS strip / Inconel 718 | Same | Same |
| Studs / Nuts | ASTM A193 B7 / A194 2H | ASTM A193 B16 / A194 4 | ASTM A193 B8 / A194 8 |
| Handwheel | Ductile iron (ASTM A536) / 304 SS cast | Same | Same |
Note: Final material selection must conform to valve nameplate or manufacturer‘s material certificate.
IV. Dimensions & Weight (Reference)
| Size | Pressure Class | End Connection | Face‑to‑Face L (mm) | Overall Height H (mm) | Handwheel OD D (mm) | Weight (kg) |
|---|---|---|---|---|---|---|
| 1″ (DN25) | Class 4500 | BW (ASME B16.25) | ~200–250 | ~400–500 | ~200–250 | approx. 10–15 |
-
Face‑to‑face per ASME B16.10 or manufacturer standard; Class 4500 typically uses shorter pattern.
-
Butt weld bevel per ASME B16.25, prepared for Schedule 160 / XXS heavy wall pipe.
-
Dimensions vary by bonnet type (pressure seal vs. bolted) and flow pattern (straight vs. Y‑pattern).
V. Key Features
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Close Die Forged Construction – One‑piece forging eliminates casting defects, providing dense grain structure and high mechanical strength for high‑temperature, high‑pressure service.
-
Pressure Seal Bonnet (Optional) – Pressure self‑tightening seal via wedge‑type seal ring; sealing performance increases with internal pressure, ensuring reliable sealing under extreme conditions.
-
Metal‑to‑Metal Sealing – Disc and seat sealing surfaces overlaid with Stellite 6/12 (cobalt‑based alloy) via PTA welding, precision ground to approx. 40–45 HRC hardness, offering excellent wear, erosion, and galling resistance.
-
OS&Y Rising Stem Design – Clear stem position indication; stem nut located above yoke, isolated from media for easy lubrication and maintenance.
-
Non‑Rotating Stem – Stem moves linearly without rotation, eliminating spiral wear on sealing surfaces and reducing packing friction for extended service life.
-
Stem Surface Treatment – Nitriding or hard chrome plating enhances surface hardness, wear resistance, and corrosion resistance, minimising packing leakage.
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Dual Stem Design (on select models) – Upper stem threads hardened and isolated from media; lower stem smooth and hardened; rotary‑to‑linear conversion reduces wear.
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Independent Backseat – When fully open, stem sealing surface engages backseat, allowing packing replacement under pressure for enhanced safety.
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Fully Guided Disc – Disc guided throughout travel for precise alignment and reliable sealing.
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Low Emission Packing System – Flexible graphite packing with nickel/stainless steel wire reinforcement, offering self‑lubrication and low friction, meeting low emission requirements.
VI. Close Die Forging Advantages
| Parameter | Description |
|---|---|
| Process | Close die forging |
| Dimensional Accuracy | High, near‑net shape, minimising post‑machining |
| Grain Flow | Metal flow lines follow component contour, providing isotropic mechanical properties |
| Material Yield | High, reducing material waste |
| Mechanical Properties | Superior tensile strength and impact toughness vs. open die forging or casting |
| Typical Defects | No casting defects (porosity, shrinkage) |
| Typical Size Range | 1/4″ ~ 4″ (standard forged range); larger sizes via open die forging or casting |
VII. Stellite Hardfacing
| Parameter | Specification |
|---|---|
| Alloy Grade | Stellite 6 / Stellite 12 (cobalt‑chromium‑tungsten‑carbon alloy) |
| Application Method | Plasma Transferred Arc (PTA) or TIG overlay welding |
| Thickness After Machining | ≥1.5 mm (0.060″) |
| Hardness | Approx. 40–45 HRC |
| Applied Surfaces | Disc sealing face, seat sealing face |
| Performance Benefits | Excellent galling resistance, high‑temperature strength, corrosion resistance, erosion resistance |
VIII. Applications
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Thermal power plants: boiler blowdown, drain, desuperheating water systems
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Petrochemical: high‑temperature, high‑pressure pipeline isolation
-
Oil refineries: FCC, hydrocracking units under severe conditions
-
Nuclear power plants: conventional island high‑pressure steam systems
-
Chemical industry: high‑pressure reactor inlet/outlet lines
-
High‑pressure gas transmission pipelines
IX. Testing & Inspection
| Test Item | Standard | Requirement |
|---|---|---|
| Shell Strength Test | API 598 | 1.5× rated pressure, no visible leakage (approx. 6,750 psi) |
| High Pressure Seat Test | API 598 | 1.1× rated pressure, zero leakage across seat (approx. 4,950 psi) |
| Backseat Test | API 598 | 1.1× rated pressure, no leakage (approx. 4,950 psi) |
| Low Pressure Seat Test | API 598 | 0.6 MPa air, no visible bubbles |
| Pressure Seal Test | Per design pressure | Sealing performance increases with pressure |
| Weld End Radiographic Inspection | ASME Code | 100% radiographic inspection of all welds |
| Wall Thickness UT Measurement | Manufacturer standard | Meets ASME B16.34 minimum thickness |
| Stem Surface Hardness Check | Manufacturer standard | Conforms to heat treatment requirements |
| Stellite Overlay Inspection | Manufacturer standard | Thickness ≥1.5 mm, no cracks or porosity |
| Factory Testing | 100% | Each valve with unique serial number, quality tag and material certificate |
X. Pressure‑Temperature Ratings (ASME B16.34 Group 2 Materials, Reference)
| Temperature (°C) | A105 Carbon Steel (MPa) | F22 Alloy Steel (MPa) | F316 Stainless Steel (MPa) |
|---|---|---|---|
| -29 ~ 38 | 76.0 | 76.0 | 76.0 |
| 100 | 70.1 | 71.2 | 68.3 |
| 200 | 60.5 | 66.8 | 59.3 |
| 300 | 52.1 | 63.3 | 52.0 |
| 400 | 44.8 | 59.9 | 47.8 |
| 425 | 41.4 | 58.2 | 46.1 |
| 450 | — | 54.0 | 44.0 |
| 500 | — | 46.0 | 37.1 |
Note: Values are for reference only. Refer to the latest ASME B16.34 for official ratings.
XI. Ordering Information
Please provide the following when ordering:
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Nominal size (1″)
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Pressure class (Class 4500)
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Body and trim material (e.g. A105, F22, F91, F316)
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End connection type (butt weld BW; specify bevel standard)
-
Bonnet type (pressure seal / bolted)
-
Flow pattern (straight / Y‑pattern)
-
Media name and operating temperature / pressure
-
Sealing surface requirement (Stellite grade and overlay thickness)
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Actuation type (handwheel, electric, pneumatic)
-
Additional requirements (low emission, radiographic inspection report, third‑party inspection, etc.)
XII. Remarks
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This technical data sheet applies to 1″-4500LB-BW Close Die Forged Globe Valve. Material and specific construction can be customised per user requirements.
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Class 4500 LB corresponds to approx. PN760 (76.0 MPa).
-
Butt weld ends are prepared for Schedule 160 or XXS heavy wall pipe to ensure compatibility with high‑pressure systems.
-
For a detailed data sheet with a specific material (e.g. F91, F316H) or a specific standard, please contact the manufacturer.
