DN50-PN25 F316L Bellow Seal Globe Valve

DN50-PN25 F316L Bellow Seal Globe Valve

Size (Nominal) DN 50 (2″ NPS)
Pressure Rating PN 25 (Class 150)
Design Pressure Up to 25 bar @ specified temperature
Design Temperature -29°C to +200°C (-20°F to +392°F) (Standard). Extended range available.
Flow Direction Flow Under Plug (Standard) / Flow Over Plug
Operation Manual Handwheel (Standard). Gear, Pneumatic, or Electric Actuation optional.
Leakage Class Seat: ANSI/FCI 70-2 Class IV (Metal Seat) or Class VI (Soft Seat if applicable). Bellow: Zero external.

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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
  • Face à face : 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

Paramètre

Spécification

Size (Nominal)

DN 50 (2″ NPS)

Pression nominale

PN 25 (Class 150)

Design Pressure

Up to 25 bar @ specified temperature

Design Temperature

-29°C to +200°C (-20°F to +392°F) (Standard). Extended range available.

Flow Direction

Flow Under Plug (Standard) / Flow Over Plug

Opération

Manual Handwheel (Standard). Gear, Pneumatic, or Electric Actuation optional.

Classe de fuite

Seat: ANSI/FCI 70-2 Class IV (Metal Seat) or Class VI (Soft Seat if applicable). Bellow: Zero external.

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

Composant

Material Specification

Valve Body & Bonnet

ASTM A351 CF3M / A182 F316L (Low Carbon Stainless Steel)

Trim (Standard)

316 Stainless Steel

Trim (Optional)

Hardened 316, Stellite, Alloy 20, Hastelloy C

Seat & Disc

316L / 316 + Stellite faced (Standard)

Tige

316 Stainless Steel (Hardened optional)

Gasket

Spiral Wound Graphite (SS316/Graphite)

Bolting

ASTM A193 B8M (316 SS)

Bellows

Hydraulically formed, Multi-ply (typically 4-6 plies), 316L SS

Packing

Secondary graphite packing as backup

Handwheel

Carbon Steel painted or SS

6.0 BELLOWS ASSEMBLY (KEY FEATURE)

  • Taper: 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.
  • Test d'étanchéité du siège : 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

  • Actionnement : 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.

GARANTIE :

SAVVY VALVES s'engage à fournir des produits d'une qualité exceptionnelle et un service après-vente sans souci. Nos vannes sont garanties pour une durée de vie minimale de 12 mois, période durant laquelle nous fournissons gratuitement toutes les pièces de rechange nécessaires et des instructions d'entretien détaillées. Pendant la période de garantie, en cas de dommage non causé par l'homme, nous remplaçons gratuitement les composants et fournissons une assistance technique professionnelle. Après l'expiration de la garantie, seuls les pièces de rechange sont à votre charge, tout en bénéficiant de services de maintenance à prix réduits. Notre objectif est d'aider nos clients à réduire leurs coûts d'exploitation et à optimiser leur production grâce à une qualité fiable et un service après-vente complet. Qu'il s'agisse de questions techniques ou de besoins de maintenance, notre équipe d'experts répondra rapidement pour garantir le fonctionnement optimal de votre système de vannes.

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