2-Piece Cryogenic Floating Ball Valve
2-Piece Cryogenic Floating Ball Valve - Image 2
2-Piece Cryogenic Floating Ball Valve - Image 3
2-Piece Cryogenic Floating Ball Valve - Image 4

2-Piece Cryogenic Floating Ball Valve

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Description

TECHNICAL DATA SHEET

Product: 2-Piece Cryogenic Floating Ball Valve
Tag No.: ____________________
Date: ____________________
Rev.: ____________________

1. GENERAL SPECIFICATION

Item Description
Valve Type Two-Piece, Side Entry, Floating Ball, Cryogenic Service
Design Standard API 608, ASME B16.34
Size 6 Inch (DN150)
Pressure Class Class 300 LB
End Connection Raised Face (RF) Flanged per ASME B16.5
Face-to-Face ASME B16.10, Long Pattern (403 mm / 15.87 in)
Operator Stainless Steel Manual Gear Operator
Special Service Cryogenic (Low Temperature)

2. MATERIALS OF CONSTRUCTION

Component Material ASTM / Standard
Body / Tailpiece CF8 (Stainless Steel 304) ASTM A351
Bonnet CF8 (Stainless Steel 304) – Extended Type ASTM A351
Ball Stainless Steel 304 ASTM A276 / A351
Stem Stainless Steel 304 ASTM A276
Seat Ring (Primary) PCTFE (Polychlorotrifluoroethylene) –
Stem Packing Graphite / PTFE with Live-Loading & Lip Seals Cryogenic Approved
Body Gasket Spiral Wound SS304/Graphite or PTFE –
Bolting / Nuts SS304 (B8/B8M Class 1) ASTM A193 / A194
Gear Operator Housing Stainless Steel (CF8 / SS304 equivalent) –
Handwheel Stainless Steel –

3. CRYOGENIC DESIGN FEATURES

  • Extended Bonnet: Sufficient gas column length to ensure packing area remains above 0 °C during operation.

  • Cavity Pressure Relief: Upstream and downstream vent holes drilled in the ball to prevent cavity over-pressurization.

  • Anti-Blowout Stem: Designed with integral shoulder to prevent stem ejection.

  • Low Emission Sealing: Primary lip seal stem packing system suitable for temperatures down to -196 °C (-321 °F).

  • Material Certification: All castings and welded components are certified for low-temperature impact toughness per applicable standards.

4. PRESSURE & TEMPERATURE RATINGS

  • Rating Standard: ASME B16.34, Standard Class 300.

  • Maximum Working Pressure (at 38 °C / 100 °F): 51.7 bar g (750 psig).

  • Minimum Design Temperature: -196 °C (-321 °F) (Liquid Nitrogen Service Capable).

  • Note: Operating pressures must be de-rated for intermediate temperatures per ASME B16.34 curves for Group 1 materials.

5. TESTING & INSPECTION

Test Standard Pressure / Criteria
Shell Hydrostatic API 598 / ASME B16.34 1.5 x Design Pressure (77.6 bar / 1125 psig)
Seat Closure API 598 1.1 x Design Pressure (56.9 bar / 825 psig)
Cryogenic Test BS 6364 / MSS SP-134 Shell & seat leakage tested with liquid nitrogen at rated temperature and pressure. Operating torque measured cold.
NDE (Optional) ASME B16.34 Radiography, Liquid Penetrant Inspection available upon request.

6. DIMENSIONS (Approximate)

Parameter Dimension
Face-to-Face (L) 403 mm (15.87 in)
Flange Outer Diameter (D) 318 mm (12.5 in)
Center to Extended Bonnet Top (H1) Consult factory (based on insulation thickness & service)
Center to Handwheel Top (H2) Consult factory (gear operator dependent)
Approx. Weight Contact factory for detailed estimate

7. GEAR OPERATOR SPECIFICATION

  • Type: Fully enclosed worm gear, grease lubricated.

  • Housing Material: Stainless Steel (Weatherproof).

  • Mounting: Standard ISO 5211 top flange pad.

  • Handwheel: Direct mount, stainless steel.

  • Options: Locking device, chain wheel, position indicator.

Disclaimer: This data sheet is for typical specification only. Final drawings, welding procedures, and inspection plans will be submitted for approval prior to manufacturing. The manufacturer reserves the right to modify designs to meet the latest engineering standards.

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