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2″-300LB SS Bellow Seal Gate Valve

2″-300LB SS Bellow Seal Gate Valve

Size 2 inches (DN 50)
Pressure Class Class 300 LB (PN 50)
Body Material Stainless Steel (ASTM A182 F304 / F316 / F316L)
Manufacturing Process Forged / Cast (depending on manufacturer)
Design Standard API 602 / ASME B16.34
End Connection Standard ASME B16.5 (Flanged RF/RTJ), ASME B16.25 (BW), ASME B16.11 (SW)
Face to Face Standard ASME B16.10
Test & Inspection Std. API 598
Emission Compliance ISO 15848-1 / TA-Luft (optional)

TECHNICAL DATA SHEET

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

  1. Basic Design Parameters

Paramètre

Standard/Specification

Taille

2 inches (DN 50)

Pressure Class

Class 300 LB (PN 50)

Matériau du corps

Stainless Steel (ASTM A182 F304 / F316 / F316L)

Manufacturing Process

Forged / Cast (depending on manufacturer)

Design Standard

API 602 / ASME B16.34

End Connection Standard

ASME B16.5 (Flanged RF/RTJ), ASME B16.25 (BW), ASME B16.11 (SW)

Face to Face Standard

ASME B16.10

Test & Inspection Std.

API 598

Emission Compliance

ISO 15848-1 / TA-Luft (optional)

  1. Technical Specifications

Paramètre

Details

Bonnet Type

Bolted Bonnet with Bellows Seal Assembly

Stem Type

Outside Screw and Yoke (OS&Y), Rising Stem

Gate Type

Flexible Wedge / Solid Wedge

Sealing Principle

Double seal: Primary Bellows Seal + Secondary Gland Packing

Bellows Material

Stainless Steel (SS304, SS316L) / Inconel 625

Applicable Media

Steam, Toxic/Hazardous Fluids, Heat Transfer Oil, Corrosive Media

Plage de température

-29°C to 595°C (depending on trim)

Opération

Handwheel / Gear Operated / Electric Actuator

  1. Material of Construction (Recommended – Stainless Steel)

Part Name

Matériel

Standard/Grade

Corps

Forged Stainless Steel

ASTM A182 F316 / F316L

Bonnet

Forged Stainless Steel

ASTM A182 F316 / F316L

Gate / Wedge

Stainless Steel + Hardfacing

A182 F316 + Stellite (optional)

Seat Ring

Stainless Steel + Hardfacing

A182 F316 + Stellite / Integral

Tige

Stainless Steel

ASTM A182 F316 (ground and polished)

Bellows

Stainless Steel

SS304, SS316L, or Inconel 625

Bonnet Gasket

Spiral Wound

Graphite + 304SS

Packing (Backup)

Flexible Graphite / PTFE

Low Sulfur, High Temp

Stem Nut

Aluminum Bronze

ZQA19-4 / C95400

Studs/Nuts

Stainless / Alloy Steel

ASTM A193 B8 / A194 8

Handwheel

Ductile Iron / Carbon Steel

ASTM A536 / A216 WCB

  1. 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)

Taille

Class

L (RF) mm

H (Closed) mm

W (Handwheel) mm

Weight (approx. kg)

2″

300LB

216

~ 370

220

~ 38

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

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

Temperature (°C)

Working Pressure (MPa)

Working Pressure (psig)

-29 to 38

5.10

740

100

4.80

695

200

4.35

630

250

4.14

600

300

3.95

575

400

3.70

535

500

3.20

465

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

  1. Test Pressure (API 598)

Test Type

Medium

Pressure (MPa)

Pressure (psig)

Note

Shell Test

Water

7.65

1,110

1.5 x 38°C Rating

High-Pressure Seat Test

Water

5.61

815

1.1 x 38°C Rating

Low-Pressure Seat Test

Air/N2

0.5 – 0.7

70 – 100

Optional

Bellows Leak Test

Helium

< 1 x 10⁻⁶ mbar·L/s

Optional (for fugitive emission compliance)

  1. 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.

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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