Cryogenic Top Entry Floating Ball Valves
Cryogenic Top Entry Floating Ball Valves - Image 2

Cryogenic Top Entry Floating Ball Valves

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Description

TOP-ENTRY CRYOGENIC FLOATING BALL VALVE TECHNICAL DATASHEET

Model: UIBB-316L-Cryo
Design Standard: API 608 / BS 6364 / BS 5351

I. GENERAL SPECIFICATIONS

Item Technical Parameter
Cryogenic Standard BS 6364 Compliant (Full compliance)
Valve Type Top-Entry Floating Ball Valve
Connection Flanged (RF) / Butt-Weld (BW)
Size Range DN15 ~ DN200 (½” ~ 8″)
Pressure Rating Class 150 ~ 600 (PN16 ~ PN100)
Temperature Range -196℃ ~ +80℃ (BS 6364 Class IV)

II. MATERIAL CONFIGURATION

Component Material Specification Certification/Test
Body/Bonnet Forged ASTM A182 F316 BS 6364 Sect. 7.3 Impact Test @ -196°C
Ball Forged 316SS + Cryo-Hardened BS 6364 Sect. 7.4 Dimensional Stability
Seat PCTFE (Polychlorotrifluoroethylene) BS 6364 Annex B Low-Temp Validation
Stem Extended Forged 316SS BS 6364 Sect. 7.5 Stem Extension Ratio ≥4:1
Bolts/Nuts ASTM A193 B8M / A194 8M Charpy V-Notch ≥27J @ -196°C

III. CRYOGENIC DESIGN FEATURES (BS 6364 COMPLIANT)

  1. Extended Stem

    • Minimum neck length: 250mm (Per BS 6364 Table 1 for Class IV)

    • Thermal gradient design: ≤5℃/cm heat flux reduction

  2. PCTFE Seat System

    • BS 6364-compliant cold compression recovery >92%

  3. Anti-Cryogenic Locking

    • Stem-to-bonnet clearance: Class D per BS 6364 Sect. 6.4

IV. PERFORMANCE DATA

Item Value/Standard
Sealing Class BS 6364 Sect. 10.2: ≤10 bubbles/min (DN50)
Cryogenic Test Media Liquid nitrogen (-196°C) per BS 6364 Sect. 9
Fire Safety API 607 + BS 6364 Sect. 11 (Fire-resistant backup seat)

V. TESTING & CERTIFICATION

  • Mandatory BS 6364 Tests:
    ✅ Cryogenic Shell Test: 1.5×PN @ -196°C (Sect. 9.3)
    ✅ Seat Leakage Test: 1.1×PN @ -196°C (Sect. 9.4)
    ✅ Operation Test: 50 cycles @ -196°C (Sect. 9.6)
    ✅ Ambient Temp. Verification: Post-cryo testing (Sect. 9.7)

  • Certifications:

    • BS 6364:2021 Type Approval

    • ISO 15848-1 CO2 Class

    • PED 2014/68/EU Category IV

VI. BS 6364-SPECIFIC UPDATES

Feature Compliance Detail
Body Wall Thickness +15% over ASME B16.34 (BS 6364 Sect. 6.2)
Gasket Design Spiral-wound SS316/FG w. inner ring
Stem Reinforcement Hard-faced Stellite 6 overlay at guide points
Cleaning Protocol ISO 15848 cleanliness Class C (O₂ service)

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