20″-600LB 3-Piece Trunnion Mounted Ball Valve
Description
3-Piece Trunnion Mounted Ball Valve Technical Data Sheet
Cast Body 20″ 600LB Flanged Ends
1. General Information
| Item | Specification |
|---|---|
| Valve Type | Trunnion Mounted Ball Valve |
| Body Type | 3-Piece Side Entry Split Body Construction |
| Manufacturing Process | Cast Body |
| Design Standard | API 6D / ASME B16.34 / ISO 14313 / BS EN 17292 |
| Nominal Size | 20 inch (DN500) |
| Pressure Class | Class 600 LB (PN100) |
| Face-to-Face / End-to-End | ASME B16.10 / API 6D |
| Connection Type | Flanged Ends (Raised Face, RF) per ASME B16.5 |
| Operation | Gear Operator (Pneumatic or Electric Actuator optional) |
| Body Material | ASTM A216 WCB (Cast Carbon Steel) |
2. Applicable Standards
| Item | Standard Code |
|---|---|
| Design & Manufacturing | API 6D, ASME B16.34, ISO 14313, BS EN 17292 |
| Face-to-Face / End-to-End | ASME B16.10 |
| Flanged Connections | ASME B16.5 (Class 600 RF) |
| Wall Thickness | ASME B16.34 |
| Test & Inspection | API 598 / API 6D |
| Fire Test | API 607 / API 6FA |
| Fugitive Emission | ISO 15848-1 |
| Valve Marking | MSS SP-25 |
3. Main Design Features
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Trunnion Mounted Ball Design: Ball is supported by upper and lower stem bearings. The thrust from line pressure is absorbed by the bearings, preventing the ball from moving against the seats. This ensures low torque operation and stable sealing performance, particularly suitable for high pressure and large bore applications
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Double Block & Bleed (DBB) Capability: Double seat design provides sealing in both directions, no flow direction restriction, achieving bi-directional zero leakage
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Spring-Loaded Seats: Seats are equipped with pre-loaded springs to ensure tight contact between seat and ball under low pressure conditions for reliable sealing
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Body Construction: 3-piece bolted body design, center flange with bolted connection, facilitates in-line maintenance without removing the entire valve from the pipeline
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Blow-Out Proof Stem: Stem designed with blow-out proof feature for safety
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Anti-Static Device: Spring-loaded anti-static device between stem and ball ensures static electricity dissipation
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Emergency Sealant Injection: Equipped with emergency sealant injection fittings on stem and seat areas for emergency sealing restoration
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Body Cavity Pressure Relief: Automatic cavity pressure relief design, seats can move backward to release excess cavity pressure, protecting valve safety
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Full Bore Design: Valve bore diameter matches pipeline internal diameter, facilitates pipeline pigging, minimal flow resistance
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ISO 5211 Mounting Pad: Top flange conforms to ISO 5211 for easy actuator mounting
4. Main Component Materials
| Item | Part Name | Material | Standard/Remark |
|---|---|---|---|
| 1 | Body | ASTM A216 WCB | Cast Carbon Steel |
| 2 | Side Cover/Bonnet | ASTM A216 WCB | Cast Carbon Steel |
| 3 | Ball | ASTM A182 F316 / A105+ENP | Stainless Steel or Carbon Steel with Electroless Nickel Plating |
| 4 | Stem | ASTM A182 F316 / 17-4PH | Stainless Steel or Precipitation Hardening Stainless Steel |
| 5 | Seat Ring | ASTM A182 F316 + Sealing Layer | Stainless Steel Base + Soft Sealing Layer |
| 6 | Seat Insert | PTFE / RPTFE / NYLON / PEEK | Selected based on service conditions |
| 7 | Seat Spring | INCONEL X-750 / 17-7PH | Corrosion Resistant Alloy Spring |
| 8 | Stem Bearing | PTFE + Stainless Steel | Self-lubricating bearings |
| 9 | Packing | Flexible Graphite / PTFE | Low emission design |
| 10 | Gasket | 304 + Flexible Graphite | Spiral Wound |
| 11 | Body Bolt | ASTM A193 Gr.B7 | Alloy Steel |
| 12 | Body Nut | ASTM A194 Gr.2H | Heavy Hex Nut |
| 13 | Gear Box | Cast Carbon Steel | With position indicator |
5. Technical Parameters & Dimensions
5.1 Pressure-Temperature Ratings
| Item | Parameter |
|---|---|
| Nominal Pressure | Class 600 LB (PN100) |
| Shell Test Pressure | 15.3 MPa (Hydrostatic) [API 598] |
| High-Pressure Seat Test Pressure | 11.2 MPa (Hydrostatic) [API 598] |
| Low-Pressure Pneumatic Test Pressure | 0.5 – 0.7 MPa (Air) |
| Temperature Range | -29°C ~ 180°C (PTFE Seats) / Up to 500°C (Metal Seated) |
| Applicable Media | Water, oil, natural gas, steam, corrosive media |
| Fire Safe Rating | API 607 / API 6FA |
5.2 Dimensions (20″ Class 600 Flanged Ends)
| Dimension | Value | Remark |
|---|---|---|
| End-to-End Length (L) | 991 mm (39.0 inch) | Flanged Ends, per ASME B16.10/API 6D |
| Height (H) | Approx. 950 – 1050 mm | Reference, may vary by manufacturer |
| Center Height (H1) | Approx. 500 – 550 mm | Stem center to bottom of body |
| Handwheel Height (H2) | Approx. 1350 – 1450 mm | Total height including gear operator |
| Flange Diameter (D) | 673 mm | ASME B16.5 Class 600 20″ RF |
| Bolt Circle Diameter | 584 mm | ASME B16.5 Class 600 20″ RF |
| Number of Bolt Holes/Size | 20 / 35 mm | ASME B16.5 Class 600 20″ RF |
| Flange Sealing Face | Raised Face | ASME B16.5 |
| Bore Diameter (d) | 489 mm | Full Bore Design |
| Weight | Approx. 2100 – 2400 kg | Cast Body including gear operator, reference value |
5.3 End Connection Details
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Flanged Connection: Flange dimensions per ASME B16.5 Class 600, Raised Face sealing, bolted connection to pipeline
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Flange Sealing Face: Standard RF (Raised Face), RTJ (Ring Type Joint) optional
6. Test & Inspection (API 598 / API 6D)
| Test Item | Test Pressure | Medium | Acceptance Criteria |
|---|---|---|---|
| Shell Test | 15.3 MPa | Water | No visible leakage |
| High-Pressure Seat Test | 11.2 MPa | Water | No visible leakage |
| Low-Pressure Seat Test | 0.5 – 0.7 MPa | Air | No bubbles leakage |
| Seat Leakage Rate | Per API 598 | — | Zero Leakage (Soft Seated) |
| Test Duration | Per API 598 | — | Hold time conforms to standard |
7. Marking & Supply
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Valve Marking: Per MSS SP-25, nameplate to include nominal size, pressure class, material, heat number, design standard, API 6D monogram, fire-safe certification mark, etc.
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Flow Direction: Bi-directional valve, usually marked with bi-directional arrows or no flow restriction marking
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Cleaning & Protection: Valves internally and externally cleaned, flange faces covered with protectors and coated with rust preventive
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Documentation: Material certificates, pressure test reports, declaration of conformity, API 6D certificate, fire test certificate provided with shipment
Note: This technical data sheet is based on standard 20″ Class 600 3-piece cast trunnion mounted ball valve design. Actual dimensions and configurations may vary depending on manufacturer and customer requirements. Please select appropriate seat material and operation type based on actual operating conditions.
