1″-4500LB-BW Close Die Forged Globe Valve

TECHNICAL DATA SHEET

1″-4500LB-BW Close Die Forged Globe Valve

1. Design Basis

1. Technical Specifications

III. Bill of Materials (Typical Options)

Note: Final material selection must conform to valve nameplate or manufacturer‘s material certificate.

1. Dimensions & Weight (Reference)

• 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).

1. 主な特徴

1. Close Die Forged Construction – One‑piece forging eliminates casting defects, providing dense grain structure and high mechanical strength for high‑temperature, high‑pressure service.
2. 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.
3. 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.
4. OS&Y Rising Stem Design – Clear stem position indication; stem nut located above yoke, isolated from media for easy lubrication and maintenance.
5. Non‑Rotating Stem – Stem moves linearly without rotation, eliminating spiral wear on sealing surfaces and reducing packing friction for extended service life.
6. Stem Surface Treatment – Nitriding or hard chrome plating enhances surface hardness, wear resistance, and corrosion resistance, minimising packing leakage.
7. 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.
8. Independent Backseat – When fully open, stem sealing surface engages backseat, allowing packing replacement under pressure for enhanced safety.
9. Fully Guided Disc – Disc guided throughout travel for precise alignment and reliable sealing.
10. Low Emission Packing System – Flexible graphite packing with nickel/stainless steel wire reinforcement, offering self‑lubrication and low friction, meeting low emission requirements.

1. Close Die Forging Advantages

VII. Stellite Hardfacing

VIII. Applications

• Thermal power plants: boiler blowdown, drain, desuperheating water systems
• 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

1. Testing & Inspection

16. Pressure‑Temperature Ratings (ASME B16.34 Group 2 Materials, Reference)

Note: Values are for reference only. Refer to the latest ASME B16.34 for official ratings.

1. Ordering Information

Please provide the following when ordering:

1. Nominal size (1″)
2. Pressure class (Class 4500)
3. Body and trim material (e.g. A105, F22, F91, F316)
4. End connection type (butt weld BW; specify bevel standard)
5. Bonnet type (pressure seal / bolted)
6. Flow pattern (straight / Y‑pattern)
7. Media name and operating temperature / pressure
8. Sealing surface requirement (Stellite grade and overlay thickness)
9. Actuation type (handwheel, electric, pneumatic)
10. Additional requirements (low emission, radiographic inspection report, third‑party inspection, etc.)

XII. Remarks

• This technical data sheet applies to 1″-4500LB-BW Close Die Forged Globe Valve. Material and specific construction can be customised per user requirements.
• 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

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