2″-1500LB-SW F91 Bellows Seal Gate Valve

Technical Datasheet

Product Name: Alloy Steel F91 Bellows Seal Gate Valve
Model: 2″-1500LB SW F91 Bellows Seal Gate Valve

1. General Information

2. Technical Specifications

3. Main Material of Parts

4. Main Dimensions & Connection Data (Unit: mm)

Note: Socket Weld ends conform to ASME B16.11.

Note: Dimensions above are typical. For Class 1500, gear operator is commonly used due to high torque requirements. Final dimensions should be based on approved manufacturer drawings.

5. Applicable Design Standards

• Design & Manufacture: API 602 (Compact Forged Valves) / ASME B16.34
• Face-to-Face Dimensions: ASME B16.10
• End Connections: ASME B16.11 (Socket Weld)
• Pressure-Temperature Rating: ASME B16.34
• Inspection & Testing: API 598
• Bellows Design: ISO 15761 / BS 6364 (adapted for high-temperature)
• Material Specifications: ASTM A182 F91

6. Product Features

1. F91 Alloy Steel Construction: ASTM A182 F91 (9Cr-1Mo-V) provides exceptional high-temperature creep strength and oxidation resistance, making it ideal for supercritical and ultra-supercritical power plant applications up to 593°C (1100°F).
2. Bellows Seal: Fully welded stainless steel (or Inconel) bellows provides a hermetic seal, eliminating fugitive emissions and ensuring zero stem leakage—critical for high-temperature steam and hazardous services.
3. Class 1500 Pressure Rating: Designed for extreme high-pressure applications, ensuring safe operation in demanding environments.
4. Socket Weld Ends: Provides a permanent, high-integrity connection suitable for high-pressure, high-temperature piping systems; eliminates flange leaks.
5. Hard-Faced Trim: Stellite 6 hard-facing on wedge and seat surfaces provides excellent wear resistance and tight shut-off under severe service conditions.
6. Backseat Feature: Allows for packing replacement under pressure (when valve is fully open), enhancing safety and reducing maintenance downtime.
7. Gear Operator (Recommended): Due to the high torque required for Class 1500 gate valves, a gear operator is typically provided for smooth and easy operation.
8. High-Temperature Bolting: ASTM A193 B16 studs and A194 4 nuts provide reliable bolting integrity at elevated temperatures.

Remarks:

• Material Significance: F91 is a high-performance chromium-molybdenum-vanadium alloy steel specifically designed for high-temperature applications such as superheater headers, main steam lines, and turbine bypass systems.
• Bellows Material: For extremely high-temperature services (above 500°C), consider Inconel 625bellows instead of 316L for enhanced thermal stability.
• Inspection: For critical power plant applications, specify NDE (Non-Destructive Examination) requirements such as liquid penetrant testing (PT) and radiographic testing (RT) per ASME B16.34.
• Gear Operator: Class 1500 gate valves typically require a gear operator due to high operating torque. Confirm inclusion with manufacturer.
• For specific dimensional data, torque values, and NDE requirements, please refer to the official certified drawings and inspection test plans (ITP) from the manufacturer.

GARANTIE:

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