3-Piece Open Die Forged Cryogenic Ball Valve c/w SA Pneumatic Actuated
Description
TECHNICAL DATA SHEET
Cryogenic Floating Ball Valve (2-Piece, Flanged Ends, Stainless Steel)
- General Information
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Item
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Specification
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Valve Type
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Floating Ball Valve, 2-Piece Split Body, Side-Entry, Anti-Static, Anti-Blowout Stem
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Size Range
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DN15 – DN300 (½” to 12″)
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Pressure Rating
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Class 150 / 300 / 600 (PN16 – PN100)
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End Connection
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Flanged Ends (Raised Face / RTJ) per ASME B16.5
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Design Standard
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BS 6364 / ISO 28921-1 / MSS SP-134 / ASME B16.34 / API 6D
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Face to Face Standard
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ASME B16.10 / ISO 5752 / BS 6364 Table 1
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Test Standard
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API 598 / API 6D / BS 6364
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Service
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LNG, LO2, LN2, LAr, Ethylene, Methane, Cryogenic Industrial Gases
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Temperature Range
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-196°C to +80°C (-320°F to +176°F)
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Bore Type
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Full Bore / Reduced Bore (Specify)
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- Bill of Materials (Materials of Construction)
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Part Name
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Qty.
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Material
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Material Specification / Notes
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Body Halves
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2
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Stainless Steel
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ASTM A182 F304/F304L (Forged) or ASTM A351 CF8/CF3 (Cast)
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Ball
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1
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Stainless Steel
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ASTM A182 F304/F316 (Forged), Chrome Plated / Surface Ra ≤ 0.4µm
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Stem
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1
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Stainless Steel
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ASTM A182 F304/F316, Anti-Blowout Design
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Seat (Downstream)
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1
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PCTFE / RPTFE
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Spring-Energized PCTFE (Preferred for -196℃) or Glass-Filled RPTFE
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Seat (Upstream)
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1
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PCTFE / RPTFE
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Optional Bidirectional Design
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Stem Seals / Packing
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Set
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PTFE + Graphite
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Live-Loaded Packing (Belleville Springs) at Ambient Zone
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Body Gasket
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2
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PTFE / Spiral Wound
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PTFE or SS+Graphite Spiral Wound
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Body Bolts & Nuts
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Set
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Stainless Steel
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ASTM A193 B8M (Bolts) / ASTM A194 8M (Nuts)
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Thrust Washer / Bearing
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1
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PTFE / Reinforced PTFE
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Reduces operating torque
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Anti-Static Device
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1
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Stainless Steel
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Ball-to-Stem / Stem-to-Body
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Stop / Locking Device
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1
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Stainless Steel
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Optional for safety
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Name Plate
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1
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Stainless Steel
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MSS SP-25 marking
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- Material Specifications & Rationale
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Component
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Material
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Rationale
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Body & Bonnet
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A182 F304/F316 / A351 CF8/CF8M
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Austenitic stainless steel retains ductility and impact toughness at -196°C. F304L/CF3 grades offer enhanced resistance to intergranular corrosion after welding. All components undergo cryogenic stabilization treatment per BS 6364 .
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Ball
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A182 F304/F316
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Hard chrome plating or electroless nickel coating improves surface hardness (Ra ≤ 0.4µm) and ensures low friction against PCTFE seat .
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Seat
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PCTFE (Spring-Energized)
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PCTFE (Poly-chloro-tri-fluoro-ethylene) maintains dimensional stability and resilience at -196°C. Spring-energized design ensures bubble-tight shut-off even at low differential pressures .
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Stem Seals
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PTFE + Graphite
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Extended bonnet positions packing away from cold zone; live-loading compensates for thermal cycles and prevents fugitive emissions .
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- Cryogenic Design Features
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Feature
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Description
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Benefit
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Extended Bonnet
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Length per BS 6364 (e.g., 250mm for DN50) keeps stem packing at ambient temperature .
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Prevents ice formation on packing; ensures reliable stem sealing and operation.
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Pressure Relief Hole
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Upstream-side hole in ball prevents cavity pressure buildup during warm-up .
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Eliminates risk of cavity over-pressurization and seat damage.
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Anti-Static Device
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Springs/plungers ensure electrical continuity between ball, stem, and body .
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Prevents static charge accumulation in flammable cryogenic services.
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Blowout-Proof Stem
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Stem retained internally by shoulder or retaining ring .
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Safety critical: prevents stem ejection under pressure.
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Cryogenic Treatment
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All pressure-containing parts thermally cycled to -196°C .
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Stabilizes microstructure; ensures dimensional stability in service.
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- Dimensional Data (Reference – Flanged Type)
*Note: Dimensions vary by manufacturer, pressure class, and extension length. Below are typical values based on ASME B16.10 / BS 6364 .*
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Size
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Face-to-Face (L)
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Extension Length (E)
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Height Open (H)
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Handwheel Dia. (D)
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Bolt Circle Dia.
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No. of Holes
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DN15 (½”)
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108 mm
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180 mm
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210 mm
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100 mm
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60.5 mm (2.38″)
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4
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DN25 (1″)
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127 mm
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200 mm
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240 mm
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125 mm
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79.4 mm (3.12″)
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4
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DN50 (2″)
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178 mm
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250 mm
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310 mm
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200 mm
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120.7 mm (4.75″)
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4
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DN80 (3″)
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203 mm
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280 mm
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370 mm
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250 mm
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152.4 mm (6.00″)
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4
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DN100 (4″)
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229 mm
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320 mm
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440 mm
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315 mm
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190.5 mm (7.50″)
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8
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DN150 (6″)
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394 mm
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400 mm
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570 mm
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400 mm
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241.3 mm (9.50″)
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8
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DN200 (8″)
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457 mm
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450 mm
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680 mm
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500 mm
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298.5 mm (11.75″)
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8
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Flange Details: Raised Face (RF) per ASME B16.5. For RTJ (Ring Type Joint) or BW (Butt Weld) ends, specify separately .
- Performance & Testing (Per API 598 / BS 6364)
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Test
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Medium
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Pressure / Condition
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Acceptance Criteria
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Shell (Body) Test
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Water / Nitrogen
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1.5 x Rated Pressure @ Ambient
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No visible leakage
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Seat (Seal) Test
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Air / Nitrogen
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1.1 x Rated Pressure @ Ambient
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ISO 5208 Class VI (Bubble-tight)
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Cryogenic Seat Test
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Liquid Nitrogen
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@ -196°C, 1.1 x Rated Pressure
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≤ 0.1 Nm³/hr (He) per BS 6364 Annex A
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Low Pressure Seat Test
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Air
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0.6 MPa (87 psi)
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Bubble-tight
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Stem Leakage Test
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Helium
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@ Ambient
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ISO 15848-1 Class B (≤10⁻⁵ mbar·L/s)
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Cavity Relief Test
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–
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Verify ball hole functions
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Pressure relief to upstream side
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Typical Test Pressures (Class 300 Example):
- Shell Test: 7.7 MPa (1,117 psi)
- Seat Test: 5.6 MPa (812 psi)
- Operating Torque & Actuation
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Size
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Torque @ Ambient (Nm)
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Torque @ -196°C (Nm)
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Recommended Operator
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DN15 (½”)
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8
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12
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Lever
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DN25 (1″)
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15
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22
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Lever
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DN50 (2″)
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45
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68
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Lever / Gear
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DN80 (3″)
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90
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135
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Gear
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DN100 (4″)
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160
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240
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Gear
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DN150 (6″)
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350
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525
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Gear / Actuator
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DN200 (8″)
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600
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900
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Gear / Actuator
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Note: Torque values increase at cryogenic temperatures due to material contraction and seal compression . For actuated valves, specify pneumatic/electric/hydraulic actuator separately .
- Flow Characteristics (Full Bore)
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Size
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Flow Coefficient Cv (US gal/min)
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Kv (m³/h)
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DN15 (½”)
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8 – 12
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7 – 10
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DN25 (1″)
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30 – 40
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26 – 35
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DN50 (2″)
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120 – 150
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104 – 130
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DN80 (3″)
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280 – 320
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242 – 277
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DN100 (4″)
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480 – 550
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415 – 476
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DN150 (6″)
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1,100 – 1,300
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952 – 1,125
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DN200 (8″)
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2,000 – 2,300
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1,730 – 1,990
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*Note: Reduced bore valves have lower Cv values (typically 60-80% of full bore).*
- Application Guidelines
- Suitable Media:
- LNG (Liquefied Natural Gas), Methane, Ethane, Ethylene
- LO2 (Liquid Oxygen), LN2 (Liquid Nitrogen), LAr (Liquid Argon)
- Liquid Hydrogen (with special material considerations)
- Not Suitable For:
- Media containing solid particles (may damage PCTFE seat)
- High-temperature service >80°C (soft-seal degradation)
- Fire-safe applications without special design (not API 607 compliant by default)
- Installation Orientation: Any position (preferably stem vertical for extended bonnet applications)
- Flow Direction: Bidirectional (with appropriate seat design)
- Special Requirements for Cryogenic Service
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Requirement
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Specification
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Oxygen Service Cleaning
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If service is LOX or oxygen-enriched, valve must be cleaned and packaged per CGA G-4.1 with special packaging to maintain cleanliness .
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Material Traceability
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Full traceability per EN 10204 Type 3.1 required for all pressure-containing parts .
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Impact Testing
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Charpy V-Notch impact tests at -196°C per ASTM A370 (minimum 41J average) .
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PMI Testing
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100% Positive Material Identification verification for all alloy components .
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Cryogenic Cycle Testing
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Optional: 200+ thermal cycles between ambient and -196°C to validate long-term performance.
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Vacuum Jacket Compatibility
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Extended bonnet length must match insulation thickness for cold box applications.
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- Marking & Documentation
- Marking: Per MSS SP-25 (Size, Pressure Class, Material, Manufacturer’s Logo, Heat No., Cryogenic Rating, CE/PED if applicable)
- Documents:
- Material Test Certificates (EN 10204 3.1)
- Pressure Test Report (Ambient + Cryogenic)
- Certified Dimensional Drawing
- Cleaning & Degreasing Certificate (if oxygen service)
- NDE Reports (RT/PT/MT as required)
Procurement Notes
- Pressure Class: Confirm required class (150LB / 300LB / 600LB) based on design pressure and temperature derating per ASME B16.34 .
- Bore Type: Specify Full Bore (for minimum pressure drop) or Reduced Bore (for cost/weight savings) .
- Seat Material: Confirm preference:
- PCTFE: Better dimensional stability, preferred for cycling service at -196°C
- RPTFE/PTFE: Lower cost, suitable for less demanding applications
- Extension Length: Specify if valve will be installed in vacuum-jacketed or cold box applications (custom extension length may be required).
- Actuation: If actuated (pneumatic/electric), provide torque requirements and control signal specifications .
- Special Cleaning: Specify if oxygen service cleaning is required (CGA G-4.1) .
- Fire-Safe Design: If fire-safe certification (API 607) is required, confirm with manufacturer as standard soft-seat designs are not fire-safe .
This technical data sheet complies with BS 6364, ASME B16.34, and API 6D requirements for cryogenic floating ball valves
GUATANTEE:
SAVVY VALVES is committed to delivering exceptional product quality and worry-free after-sales service. Our valves are guaranteed to provide a minimum service life of 12 months, during which we will supply all necessary spare parts and detailed maintenance instructions free of charge. Within the warranty period, if any non-human-induced damage occurs, we will replace components at no cost and provide professional technical support. After the warranty expires, customers only need to pay for the cost of spare parts, while still benefiting from discounted maintenance services. Our goal is to help clients reduce operational costs and enhance production efficiency through reliable quality and comprehensive after-sales support. Whether for technical inquiries or maintenance needs, our expert team will respond promptly to ensure your valve system maintains optimal performance at all times.
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