2-Piece Cryogenic Floating Ball Valves Ready For Actuator—6″ 300LB RF

Description

Technical Data Sheet

2-Piece Cryogenic Floating Ball Valve – Actuator Ready
Size: 6″ (DN150)
Pressure Class: 300LB
End Connection: Raised Face (RF) Flanged
Body Material: ASTM A351 CF8

1. General Description

This is a two-piece, side-entry, cryogenic floating ball valve featuring an extended bonnet for cryogenic service down to -196 °C (-320 °F). The valve body and bonnet are precision cast from ASTM A351 CF8 stainless steel. It is designed for isolation and on-off control of liquefied gases such as LNG, liquid nitrogen, liquid oxygen, and other cryogenic fluids. The valve comes actuator-ready with a mounted gear operator having an ISO 5211 top flange for easy installation of pneumatic, electric, or hydraulic actuators. It also retains a manual handwheel for emergency operation. Full compliance with international cryogenic standards ensures reliable bubble-tight shutoff and long service life.

2. Design Codes & Standards

Item Applicable Standard
Basic Design & Manufacture API 608, API 6D, BS 6364, ISO 17292
Pressure-Temperature Rating ASME B16.34
Flanged Ends ASME B16.5 (RF)
Face-to-Face Dimensions ASME B16.10 (Long Pattern)
Inspection & Testing API 598, BS 6364 (Cryogenic Test)
Fire-Safe Design (Optional) API 607 / ISO 10497
Casting Material ASTM A351 CF8
Actuator Mounting ISO 5211
3. Main Technical Specifications

Nominal Size: 6″ (DN150)
Pressure Class: Class 300
Bore Type: Full Bore (standard) / Reduced Bore (optional)
Connection: Flanged RF per ASME B16.5
Body / Bonnet Material: ASTM A351 CF8 (Casting)
Ball Material: CF8 / SS304 (or SS316 with hard chrome plating optional)
Seat Material: PCTFE (Standard) / TFM / Metal (Optional)
Stem Material: ASTM A182 F304 / F316 or 17-4PH
Packing: Flexible Graphite + PTFE braided
Body-Bonnet Gasket: 304+Graphite Spiral Wound or PTFE
Design Temperature Range: -196 °C to +200 °C (-320 °F to +392 °F)
Leakage Class: Zero Leakage (API 598)
Operation: Gear operator with handwheel + ISO 5211 top mounting pad ready for actuator
Design Features:

Extended bonnet with integral drip plate (ensures stuffing box above 0 °C)
Blow-out proof stem design
Antistatic device (spring contact between ball-stem-body)
Self-relieving seats (cavity pressure vents to upstream)
Locking device provision on gearbox
4. Materials of Major Parts

No. Part Name Material Standard
1 Body ASTM A351 CF8 ASTM A351
2 Bonnet (Extended) ASTM A351 CF8 ASTM A351
3 Ball CF8 / A182 F304 ASTM A351 / A182
4 Seat Ring PCTFE —
5 Stem A182 F304 / A564 17-4PH ASTM A182 / A564
6 Packing Graphite + PTFE braided —
7 Body-Bonnet Gasket 304+Graphite Spiral Wound ASME B16.20
8 Stud A193 B8 (Class 1) ASTM A193
9 Nut A194 8 ASTM A194
10 Drip Plate SS304 —
11 Antistatic Spring SS316 —
12 Gear Operator Cast Iron / Carbon Steel, Epoxy Painted ISO 5211
5. Principal Dimensions (6″ 300LB RF)

Symbol Description Value (mm) Value (inch)
L Face-to-Face Length 403 15.87
D Flange Outer Diameter 318 12.50
D1 Bolt Circle Diameter 270 10.63
D2 Bolt Hole Diameter 22.2 0.88
b Flange Thickness (excl. RF) 25.4 1.00
H Centerline to Top of Gearbox ISO Pad (approx.) ~700 ~27.56
H1 Centerline to Handwheel Centre (approx.) ~550 ~21.65
ISO Pad ISO 5211 flange size F10 / F12 —
Cv Rated Flow Coefficient (Full Bore) ~1200 —
MAST Max. Allowable Stem Torque 800 Nm —
Weight Approx. Weight (incl. gearbox) ~160 kg —
Bolt Holes Quantity & Size 12 × 7/8″ UNC —
Note: Dimensions conform to ASME B16.10 and B16.5. ISO pad details, height values are approximate and will be confirmed on the approved dimensional drawing.

6. Performance Tests & Inspection

Shell Test: 1.5 × Class 300 rated pressure (≈ 77.6 bar / 1125 psi), duration ≥1 minute, no leakage or permanent deformation.
High-Pressure Seat Test: 1.1 × rated pressure (≈ 56.9 bar), water, zero leakage.
Low-Pressure Seat Test: 0.6 bar pneumatic, zero leakage.
Cryogenic Test: Per BS 6364, valve submerged in liquid nitrogen at -196 °C. Operational and leakage tests performed; packing area must remain leak-free and functional. Torque measured under cryogenic conditions.
Visual & Dimensional: 100% casting inspection, free from porosity, cracks; flange finish Ra 3.2–6.3 μm. Face-to-face and flange dimensions verified.
Material Certification: EN 10204 Type 3.1 certification available. PMI optional.
7. Installation & Maintenance Tips

Actuator Mounting: The valve is supplied with a gearbox and ISO 5211 pad. Mount the actuator aligning the drive bore and bolt pattern. Ensure no excessive side loading.
Orientation: The extended bonnet must be installed with the stem vertical (max. deviation ±15°) to ensure proper cryogenic isolation and prevent packing freezing.
Flow Direction: Bidirectional; usually installed with the body cavity relief towards the upstream side. Follow the arrow if specified.
Cold Service Startup: After initial cool-down to cryogenic temperature, re-tighten the body-bonnet bolting and packing gland to compensate for thermal contraction.
Oxygen Service: For LOX or gaseous oxygen applications, the valve must be thoroughly degreased and assembled in a clean environment. Do not use hydrocarbon-based lubricants or sealants.
Maintenance: Periodically cycle the valve to ensure smooth operation. The gearbox should be lubricated per manufacturer’s recommendation.
This technical data sheet is for product selection reference only. The manufacturer reserves the right to alter designs and materials without prior notice. Final confirmed data shall be reflected in the project-specific approved drawings and documentation.