DN50-PN25 F316L Bellow Seal Globe Valve

TECHNICAL DATA SHEET

PRODUCT: Bellow Seal Globe Valve
MODEL / REFERENCE: DN50-PN25 F316L
TYPE: Bolted Bonnet, Outside Screw & Yoke (OS&Y), Bellow Sealed

1.0 PRODUCT DESCRIPTION & APPLICATION
A bellow seal globe valve designed for reliable isolation in applications requiring zero external leakage of hazardous, toxic, expensive, or environmentally sensitive fluids. The hermetically sealed bellow assembly protects the stem sealing area, eliminating fugitive emissions and ensuring long-term stem seal integrity. The F316L body material provides excellent corrosion resistance in a wide range of chemical and high-purity services. Suitable for chemical processing, pharmaceutical, petrochemical, LNG, and refining industries.

2.0 DESIGN & STANDARDS

• Design: Globe, Angle, or Oblique Pattern (as specified)
• Connection Ends: RF Raised Face Flange per ASME B16.5
• Persönlich: ASME B16.10
• Flange Dimensions: ASME B16.5
• Fire Safe Design: API 607 / API 6FA (if applicable)
• Fugitive Emissions: Compliant with TA-Luft, ISO 15848-1 (specify class), or SHELL MESC SPE 77/312 (as specified)

3.0 GENERAL SPECIFICATIONS

4.0 PRESSURE-TEMPERATURE RATINGS

• Body & Bonnet: Per ASME B16.34 for Class 150.
• Bellow: Designed for full pressure differential across the closed valve and cyclic life suitable for the application.

5.0 MATERIALS OF CONSTRUCTION

6.0 BELLOWS ASSEMBLY (KEY FEATURE)

• Typ: Welded, Multi-ply.
• Material: 316L Stainless Steel.
• Design Life: Minimum [e.g., 10,000] cycles as per ASTM E292.
• Function: Primary sealing element, welded to the stem and bonnet, forming a hermetic seal.
• Testing: 100% helium leak tested per specified standards.

7.0 TESTING & INSPECTION

• Shell Test: Per API 598 / ASME B16.34. Hydrostatic test at 1.5 x PN pressure.
• Sitzdichtheitsprüfung: Per API 598.
• Bellow Helium Leak Test: As per manufacturer’s standard (e.g., < 1 x 10^-6 mbar*l/s).
• Fugitive Emissions Test: Optional, per specified standard (ISO 15848-1, etc.).
• Documentation: Material Test Certificates (MTC/CMTR) as per EN 10204 3.1. Dimensional inspection report.

8.0 SURFACE FINISH

• Internals: Smooth finish for process fluid compatibility.
• Externals: Sandblasted and cleaned.
• Painting: Carbon steel parts painted with epoxy primer and finish coat. Color per customer specification.

9.0 OPTIONS & ACCESSORIES

• Betätigung: Pneumatic, Electric, Hydraulic.
• Gear Operator
• Limit Switches / Positioners
• Extended Bonnet for insulation or high/low temp
• Jacketed Body
• Cryogenic or High-Temperature Design
• Special Coatings or Internal Polishing

10.0 NOTES

• Specifications are subject to change based on specific customer requirements and final order confirmation.
• All pressures and temperatures are interdependent; consult the manufacturer’s detailed P-T rating chart for the specific material combination.
• The bellow is a critical safety component; proper handling and avoidance of over-travel during operation is essential.

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