2″-300LB SS Bellow Seal Gate Valve

TECHNICAL DATA SHEET

Product Name: 2-inch 300LB Stainless Steel Bellows Seal Gate Valve
Model/Specification: 2″-300LB-SS-Bellow
Ventiltyp: Gate Valve (Bellows Sealed)
Connection Type: Flanged (RF) / Butt Weld (BW) / Socket Weld (SW) User specified

1. Basic Design Parameters

2. Technical Specifications

3. Material of Construction (Recommended – Stainless Steel)

4. Main Dimensions & Connection Details

Note: Dimensions are for Flanged Ends (RF) according to ASME B16.10 and ASME B16.5. BW end length may vary.

4.1 End-to-End Dimensions (Face-to-Face)

4.2 Flange Details (Per ASME B16.5 – Class 300)

• Flange Diameter (OD): 165 mm (6.5 in)
• Bolt Circle Diameter: 127 mm (5.0 in)
• Number of Bolt Holes: 8
• Bolt Hole Size: 3/4 in (19 mm)
• Hub Diameter: 92 mm (3.62 in)
• Raised Face Height: 2 mm (0.06 in)

4.3 Weld End Preparation (if BW – per ASME B16.25)

• Bevel Angle: 37.5° (±2.5°)
• Root Face: 1.6 mm (1/16″) nominal
• Counterbore: To match pipe schedule (e.g., Sch. 40, Sch. 80) as specified.

5. Pressure-Temperature Rating (ASME B16.34)

*Material Group: 2.1 / 2.2 (Stainless Steel – A182 F304/F316)*

Note: Actual rating depends on specific grade (CF8, CF8M, F304, F316). Consult manufacturer for exact values above 400°C.

6. Test Pressure (API 598)

7. Features & Applications

• Key Features:
• Zero Leakage (Hermetic Seal): The multi-ply stainless steel bellows is welded to the stem and bonnet, creating a metal barrier that prevents fugitive emissions and ensures environmental safety.
• Double Seal Safety: Incorporates a secondary graphite packing as a backup in case of bellows failure, ensuring operational integrity.
• Maintenance-Free Stem: Eliminates the need for frequent packing adjustments or replacements, reducing downtime.
• Long Cycle Life: Bellows design accommodates thousands of open/close cycles without fatigue (up to 10,000+ cycles).
• Corrosion Resistance: Full stainless steel construction (body, bonnet, bellows) provides excellent resistance to corrosive media.
• Backseat Design: Protects the bellows and packing from system pressure when the valve is fully open.
• OS&Y Design: Provides visual indication of valve position.
• Main Applications:
• Petrochemical & Refinery Plants (handling hydrocarbons, H₂S)
• Thermal Oil Systems & Heat Transfer Fluids
• Steam Systems (Power Generation)
• Chemical Processing (corrosive/toxic fluids)
• Pharmaceutical & High-Purity Applications
• Applications requiring compliance with strict fugitive emission regulations (ISO 15848, TA-Luft)

Disclaimer: The above data is prepared based on common standards for bellows seal gate valves. Specific dimensions, materials, and pressure ratings may vary by manufacturer. The final technical agreement shall prevail.

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