TECHNICAL DATA SHEET
Product Name: 1/2-inch 800LB Stainless Steel Cryogenic Floating Ball Valve
Model/Specification: 1/2″-800LB-CRYO
Typ ventilu: Floating Ball Valve (Cryogenic Service)
Connection Type: Threaded (NPT) / Butt Weld (BW) / Socket Weld (SW) User specified
- Basic Design Parameters
Parametr | Standard/Specification |
Velikost | 1/2 inch (DN 15) |
Pressure Class | Class 800 LB (PN 130) |
Materiál těla | Stainless Steel (ASTM A182 F304 / F316 / F316L) |
Manufacturing Process | Close Die Forged / Open Die Forged |
Design Standard | ASME B16.34 / API 608 / API 6D / BS 5351 |
End Connection Standard | ASME B1.20.1 (NPT Thread) / ASME B16.25 (BW) / ASME B16.11 (SW) |
Face to Face Standard | Manufacturer Standard / ASME B16.10 |
Test & Inspection Std. | API 598 / ISO 5208 / BS 6364 (Cryogenic Test) |
Fire-Safe Design | API 607 / ISO 10497 (Optional) |
Fugitive Emission | ISO 15848-1 (Optional) |
- Technical Specifications
Parametr | Details |
Typ ventilu | Floating Ball, 2-Piece or 3-Piece Construction |
Bonnet Type | Extended Bonnet (for Cryogenic Service) |
Service Temperature | -196°C to +120°C (with PCTFE seats) / Up to +200°C (with PTFE) |
Applicable Media | LNG, LOX, LIN, LAr, Ethylene, and other cryogenic fluids |
Typ otvoru | Full Bore / Reduced Bore (Optional) |
Operace | Lever Handle / Gearbox / Pneumatic Actuator / Electric Actuator |
Antistatické zařízení | API 608 Requirement (Standard) |
Blow-Out Proof Stem | Norma |
Cavity Pressure Relief | Self-relieving seat design (upstream/downstream) |
- Material of Construction (Recommended – Stainless Steel for Cryogenic)
Part Name | Materiál | Standard/Grade |
Tělo | Forged Stainless Steel | ASTM A182 F304 / F316 / F316L |
End Cap / Bonnet | Forged Stainless Steel | ASTM A182 F304 / F316 / F316L |
Míč | Stainless Steel (Hardened) | ASTM A182 F304/F316 + STL (optional) |
Zastavit | Stainless Steel | ASTM A182 F304 / F316 (Blow-out proof) |
Seat Seal (Primary) | PCTFE (KEL-F®) / PTFE / RPTFE | PCTFE for cryogenic service |
Stem Seal / Packing | PCTFE / Graphite | Low temperature stable materials |
Gasket | Stainless Steel + Graphite | Spiral Wound / Reinforced |
Antistatické zařízení | Stainless Steel Ball + Spring | 316 SS |
Body Bolts/Nuts | Stainless Steel | ASTM A193 B8 / A194 8 |
Handle / Lever | Stainless Steel | ASTM A182 F304 / Zinc Plated CS |
- 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)
Velikost | Class | Spojení | L (mm) | L (in) | H (Open) mm | H (Open) in | W (Handle) mm | W (Handle) in | Weight (kg) | Weight (lbs) |
1/2″ | 800LB | 1/2″ NPT | 68 | 2.68 | 95 | 3.74 | 125 | 4.92 | 0.5 | 1.1 |
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.
- Pressure-Temperature Rating (Class 800)
*Material Group: Stainless Steel (A182 F304/F316) – Values derived from ASME B16.34 and PTFE seat limits.*
Temperature (°C) | Working Pressure (bar) | Working Pressure (psi) | Notes |
-196 to -46 | 138.0 | 2000 | Cryogenic Range (PCTFE seats) |
-29 to 38 | 138.0 | 2000 | Standard Range (PTFE seats) |
100 | 124.0 | 1800 | |
150 | 111.0 | 1610 | |
200 | 97.0 | 1405 | Max for PTFE |
230* | 85.0 | 1230 | Short-term only |
*For cryogenic service (below -46°C), PCTFE seats maintain excellent sealing properties down to -240°C. *
- Flow Characteristics (Full Bore – 1/2″)
Parametr | Value |
Flow Coefficient Kv (m³/h) | 5.5 |
Flow Coefficient Cv (US gal/min) | 6.4 |
Port Diameter (Full Bore) | ~12 mm (0.47 in) (typical for 1/2″ Class 800) |
- Test Pressure (API 598 / BS 6364)
Test Type | Medium | Pressure (bar) | Pressure (psi) | Note |
Shell Test (Hydrostatic) | Water | 207 | 3000 | 1.5 x 38°C Rating |
High-Pressure Seat Test | Water | 152 | 2200 | 1.1 x 38°C Rating |
Low-Pressure Seat Test | Air/N2 | 5.5 – 7.0 | 80 – 100 | Per API 598 |
Cryogenic Seat Test | Helium/N2 | @ Rated Pressure | @ Rated Pressure | Per BS 6364 at -196°C |
- 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.
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.
ZÁRUKA:
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