Top Entry Floating Ball Valve Close Die Forged-DN25 PN25 SW
Description
Top Entry Floating Ball Valve – DN25 PN25, Socket Weld, Close Die Forged Carbon Steel
Model: TE-FBV-DN25-PN25-SW-CS
Product Description: Top entry (top-loaded), close die forged, floating ball valve with socket weld ends. The one-piece body design allows all internal components (ball, seats, stem) to be removed from the top without disturbing the pipe connections, enabling true in-line maintenance. Ideal for high-pressure, high-temperature oil, gas, and chemical applications where minimal downtime is critical.
1. Main Design Codes and Standards
| Item | Standard / Code |
|---|---|
| Valve Design | ISO 17292, API 608, GB/T 12237 |
| Face-to-Face | Manufacturer’s Standard (ASME B16.10 for SW pattern) |
| End Connections | ASME B16.11 Socket Weld (SW) |
| Pressure-Temperature Ratings | ASME B16.34, Material Group 1.1 (Forged Carbon Steel) |
| Testing & Inspection | API 598, ISO 5208 |
| Fire-Safe Design (Optional) | API 607 / ISO 10497 |
| Anti-Static Design | Per ISO 17292 / API 608 (≤10 Ω) |
| Blow-out Proof Stem | Internally inserted stem with integral shoulder |
2. Main Technical Parameters
| Parameter | Specification |
|---|---|
| Nominal Size | DN25 (1″) |
| Pressure Class | PN25 (Class 150 equivalent) |
| End Connection | Socket Weld (SW) per ASME B16.11, for Sch.80 pipe |
| Body Construction | One-piece top entry, close die forged body |
| Ball Type | Floating ball (full bore standard) |
| Seat Type | Virgin PTFE (standard), bidirectional, self-relieving |
| Operation | Lever handle (lockable) |
| Flow Direction | Bi-directional, bubble-tight shut-off |
| ISO 5211 Mounting | Top flange pad available for actuator mounting |
3. Pressure-Temperature Ratings (ASME B16.34 Group 1.1 – Close Die Forged Carbon Steel, PN25)
Ratings for the metal body. PTFE seats are limited to 150 °C continuous (180 °C intermittent).
| Temperature (°C) | Max. Working Pressure (bar) | Approx. psi |
|---|---|---|
| -29 to 38 | 25.9 | 375 |
| 50 | 25.4 | 368 |
| 100 | 22.6 | 328 |
| 150 | 20.2 | 293 |
| 200 | 18.4 | 267 |
| 250 | 16.8 | 244 |
| 300 | 15.3 | 222 |
For continuous service above 150 °C, PEEK or reinforced PTFE seats are recommended. Consult manufacturer for seat-specific P-T curves.
4. Materials of Main Parts
| No. | Part Name | Material | Remarks |
|---|---|---|---|
| 1 | Body (One-piece top entry) | ASTM A105N (Close Die Forged) | Carbon steel, normalized, superior grain flow |
| 2 | Ball | ASTM A276 316 (or 304) | Solid stainless steel, polished |
| 3 | Stem | ASTM A276 316 | Blow-out proof, polished, with thrust shoulder |
| 4 | Seats | Virgin PTFE | Bidirectional, molded lip for tight seal |
| 5 | Body Gasket / Top Cover Seal | PTFE / Graphite (or spiral wound SS304/Graphite) | For bonnet-less top entry, retained by threaded retainer |
| 6 | Stem Packing | PTFE V-rings / Graphite | Adjustable gland |
| 7 | Stem Thrust Washer | PTFE / Filled PTFE | Low friction |
| 8 | Bolting (Top Cover/Gland) | ASTM A193 B7 / A194 2H | High-strength alloy steel |
| 9 | Handle / Lever | Carbon Steel with PVC grip / Stainless Steel | Lockable design |
| 10 | Anti-Static Spring | SS316 | Spring between ball and stem, stem and body |
| 11 | Socket Weld Ends | Forged integrally with body | Per ASME B16.11, Sch.80 bore |
5. Dimensions & Weight – DN25 PN25, Socket Weld (Typical)
| Parameter | Dimension (mm) | Remarks |
|---|---|---|
| Face-to-Face (L) | 150 (Manufacturer’s Standard) | Compact top entry design |
| Height to Stem Top (H1) | 85 | Without handle |
| Height to Handle Top (H, open) | 125 | With lever handle |
| Handle Length (W) | 150 | |
| Socket Bore (ID) | 25.4 | To fit 1″ Sch.80 pipe |
| Socket Depth | ≥ 9.5 | Per ASME B16.11 |
| Approx. Weight | 3.8 kg |
Exact dimensions and certified outline drawings are available upon request.
6. Performance Testing
| Test Item | Test Medium | Test Pressure | Acceptance Criteria |
|---|---|---|---|
| Shell Hydrostatic | Water | 38.9 bar (1.5 × max. rated at 38 °C) | No visible leakage or deformation |
| High-Pressure Seat Test | Water | 28.5 bar (1.1 × max. rated) | Zero leakage (API 598 Rate A for soft seats) |
| Low-Pressure Seat Test | Air / Nitrogen | 6 bar (87 psi) | Zero bubble leakage |
| Anti-Static Test | Dry circuit | ≤ 10 Ω (Stem-to-ball, ball-to-body) | ISO 17292 / API 608 |
| Fire-Safe Test (if ordered) | – | Per API 607 | Passes fire and leakage tests |
7. Design Features
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Top Entry In-Line Maintenance: The entire valve internals (ball, seats, stem) are extracted from the top by removing a single threaded retainer or bolted cover. This allows service without cutting the pipe or removing the valve, drastically reducing downtime.
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Close Die Forged Body: The one-piece body is produced from close die forgings, providing uniform grain flow, superior strength, and no casting defects. This enhances safety and extends service life in high-pressure cycling.
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Floating Ball & Bidirectional Seal: The ball shifts downstream to compress the seat, ensuring a tight seal in both flow directions. The upstream seat automatically relieves over-pressure in the body cavity.
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Anti-Blowout Stem: The stem is loaded from inside the body and features an integral shoulder that bears against the body, preventing ejection even if the gland is removed.
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Anti-Static Device: Conductive springs ensure electrical continuity, preventing static charge accumulation during operation.
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Self-Relieving Cavity: Excess cavity pressure caused by thermal expansion vents past the upstream seat into the pipeline.
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Socket Weld Ends: Provide a clean, permanent leak-tight connection ideal for compact piping where flanges are impractical.
8. Application Scope
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Suitable Media: Water, steam, oil, natural gas, and non-corrosive hydrocarbons compatible with carbon steel and PTFE.
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Temperature Range: -29 °C to +150 °C (PTFE seats); body rated to +300 °C (seats limit).
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Industries: Petrochemical, power generation, oil & gas, district heating, chemical processing, steam lines.
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Key Advantages:
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In-line maintenance reduces total cost of ownership.
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Close die forged body provides exceptional integrity and a compact footprint.
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Full bore design minimizes pressure drop and allows pigging.
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Quarter-turn quick operation with clear visual position indication.
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9. Optional Configurations & Accessories
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Seat Materials: RTFE (15% glass-filled PTFE), PEEK (up to 260 °C body permitting), TFM, Devlon, metal-seated (with Stellite overlay).
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Ball & Stem Materials: 304 SS, Duplex SS, Monel, Inconel 625 for corrosive services.
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Body Material: ASTM A182 F304/F316 (stainless steel), F51 Duplex, or other alloys on request.
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Fire-Safe Package: Graphite body seal and secondary metal seats, certified to API 607.
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End Connections: Flanged (RF), Butt Weld (BW), or NPT Threaded ends available.
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Extended Stem: For insulated pipelines or elevated temperatures.
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Live-Loaded Packing: Spring-loaded gland for fugitive emission compliance.
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Actuation: ISO 5211 mounting pad for direct installation of pneumatic or electric actuators. Limit switches, solenoid valves, positioners.
-
Locking Device: Padlockable lever handle.
Disclaimer: This technical data sheet is for reference and selection purposes based on common industrial standards. All exact dimensions, ratings, material certifications (EN 10204 Type 3.1/3.2), and performance data must be confirmed against the manufacturer’s certified documentation and approved drawings before procurement or installation.
