Description

TECHNICAL DATA SHEET

Product Name: 1/2-inch 800LB Stainless Steel Cryogenic Floating Ball Valve
Model/Specification: 1/2″-800LB-CRYO
Valve Type: Floating Ball Valve (Cryogenic Service)
Connection Type: Threaded (NPT) / Butt Weld (BW) / Socket Weld (SW) User specified

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1. Basic Design Parameters

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2. Technical Specifications

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3. Material of Construction (Recommended – Stainless Steel for Cryogenic)

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4. Main Dimensions & Connection Details

*Note: Dimensions are for 1/2″ Threaded End (NPT) connections. BW/SW dimensions may vary by manufacturer.*

4.1 End-to-End Dimensions (Threaded)

4.2 Extended Bonnet (Cryogenic Feature)

• Extension Length: Designed to keep packing box above frost line (typically 150mm – 250mm for 1/2″ valve, depending on service temperature [-196°C]).

• Drip Plate: Included to prevent ice formation on the body/bonnet joint.

4.3 Weld End Preparation (if BW – per ASME B16.25)

• Bevel Angle: 37.5°

• Root Face: 1.6 mm (1/16″) nominal

• Counterbore: To match pipe schedule (e.g., Sch. 80, Sch. 160) as specified.

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5. Pressure-Temperature Rating (Class 800)

*Material Group: Stainless Steel (A182 F304/F316) – Values derived from ASME B16.34 and PTFE seat limits.*

*For cryogenic service (below -46°C), PCTFE seats maintain excellent sealing properties down to -240°C. *

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6. Flow Characteristics (Full Bore – 1/2″)

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7. Test Pressure (API 598 / BS 6364)

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8. Features & Applications

• Key Features:

  • Cryogenic Service Capability: Designed for temperatures as low as -196°C (-320°F), suitable for LNG and other liquefied gases.

  • Extended Bonnet: Protects the stem seals and packing from the extreme cold, ensuring operability and preventing ice formation.

  • PCTFE (KEL-F®) Seats: Provides reliable sealing at cryogenic temperatures with excellent dimensional stability.

  • Cavity Pressure Relief: Self-relieving seat design prevents dangerous over-pressure in the ball cavity due to vaporization of trapped cryogenic liquid.

  • Blow-out Proof Stem: Ensures stem retention under all pressure conditions.

  • Anti-Static Device: Dissipates static charge generated by ball/seat friction, critical for flammable media like LNG.

  • Fire-Safe Design: Optional API 607 certification ensures sealing integrity in case of fire.

  • Forged Body: Provides superior strength and reliability at high pressures and low temperatures.

• Main Applications:

  • LNG (Liquefied Natural Gas): Liquefaction, storage, transportation, and regasification plants.

  • Air Separation Units (ASU): Handling LOX (Liquid Oxygen), LIN (Liquid Nitrogen), LAr (Liquid Argon).

  • Petrochemical: Handling ethylene, methane, and other cryogenic hydrocarbons.

  • Industrial Gas: Cryogenic storage tanks and transfer lines.

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Disclaimer: The above data is prepared based on common standards for cryogenic floating ball valves. Specific dimensions, materials, and pressure ratings may vary by manufacturer. The final technical agreement shall prevail.