3″-150LB-RF Floating Ball Valve
Description
Technical Data Sheet (English Version)
Product: Floating Ball Valve
Size / Rating: 3″ – Class 150 – RF (Raised Face)
Body Material: WCB / A105 (CS) / CF8 / CF8M (SS)
1. General Description
This flanged floating ball valve is available in 2‑piece or 3‑piece construction with carbon steel or stainless steel body options. Featuring low flow resistance, fast quarter‑turn operation, and bidirectional sealing, it is one of the most widely used isolation valves in industrial piping systems. The 3‑inch size is ideal for medium‑flow applications and comes standard with a locking handle, with optional gearbox or actuator for automation.
2. Basic Specifications
| Parameter | Specification |
|---|---|
| Size | 3″ (DN80) |
| Pressure Class | Class 150 (PN20) |
| Design Type | Floating Ball Valve (2‑piece / 3‑piece optional) |
| End Connections | Flanged RF (Raised Face) |
| Flange Standard | ASME B16.5 |
| Temperature Range | -29°C ~ +200°C (depending on seat material) |
| Media | Water, oil, gas, steam, mild corrosive fluids |
3. Material Specification
| No. | Part Name | Standard (CS) | Standard (SS) | Upgrade Option |
|---|---|---|---|---|
| 1 | Body | A105 / WCB | CF8 (304) / CF8M (316) | F51 (Duplex) / Monel |
| 2 | Ball | 304 SS (Chrome plated) | 304 / 316 SS | 316L / Monel / Hastelloy |
| 3 | Seat | PTFE / RPTFE | PTFE / RPTFE | PEEK / Nylon / Metal Seated |
| 4 | Stem | 304 SS | 304 / 316 SS | 17-4PH / Inconel |
| 5 | Packing | PTFE | PTFE | Flexible Graphite / Low Emission |
| 6 | Body Gasket | PTFE / Spiral Wound | PTFE / Spiral Wound | Graphite Composite |
| 7 | Operator | Lever with lock (standard) | Lever with lock (standard) | Worm Gearbox / Actuator |
4. Key Features
4.1 Floating Ball Design Advantages
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Low flow resistance – Full‑port design offers minimal pressure drop, equivalent to a straight pipe section.
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Quarter‑turn operation – Fast 90‑degree operation suitable for frequent cycling.
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Bidirectional sealing – Upstream pressure forces the ball against the downstream seat for reliable shut‑off.
4.2 Seat & Sealing
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Low torque seats – PTFE/RPTFE seats provide self‑lubrication and low operating torque.
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Anti‑static design – A grounding spring ensures electrical continuity between stem, ball, and body to prevent static buildup.
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Blowout‑proof stem – Stem is designed to prevent ejection under pressure.
4.3 Connection & Operation
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RF flanged ends – Conforms to ASME B16.5 for reliable sealing with spiral wound or non‑metallic gaskets.
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Operation options:
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3″: Lever with lock (standard) – Allows open/close position locking to prevent accidental operation
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Worm gearbox optional – Reduces operating torque for easier manual operation
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ISO 5211 actuator mounting pad available for pneumatic/electric actuators
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5. Testing & Standards
| Test / Standard | Reference |
|---|---|
| Design & Manufacture | ASME B16.34 / API 608 |
| Flange Standard | ASME B16.5 |
| Pressure Testing | API 598 / ISO 5208 |
| Shell Test | 1.5 × Class 150 (3.0 MPa) |
| Low‑Pressure Seat Test | 0.6 MPa (bubble‑tight) |
| Fire Safe (optional) | API 607 / ISO 10497 |
| Anti‑Static | API 608 / ISO 17292 |
| Fugitive Emission (optional) | ISO 15848‑1 / TA‑Luft |
6. Installation & Maintenance Notes
6.1 Installation Precautions
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Flow direction – Floating ball valves are bidirectional; however, installing according to the body arrow is recommended to maximize seat life.
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Flange installation – Use appropriate gaskets (spiral wound recommended). Tighten bolts evenly in a cross pattern.
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Welding (if applicable) – For weld‑end valves, open the valve before welding to prevent heat damage to seats.
6.2 Operation & Maintenance
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Operating torque – For 3″ valves, an extended lever or gearbox is recommended to avoid excessive stem torque.
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Periodic inspection – Check packing area for leakage; if slight leakage occurs, carefully tighten the packing gland.
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Seat replacement – Top‑entry or 2‑piece design allows internal component replacement without removing the valve from the pipeline (depending on construction).
7. Approximate Dimensions (for reference)
| Dimension | Value (mm / inch) |
|---|---|
| Face‑to‑Face Length (L) | ~203 mm (8.0″) |
| Flange Outer Diameter | Per ASME B16.5 Class 150 |
| Flange Bolt Circle | Per ASME B16.5 Class 150 |
| Overall Height (lever) | ~180 ~ 200 mm |
| Overall Height (gearbox) | ~300 ~ 350 mm |
| Operator | Lever with lock (standard) / Worm gearbox (optional) |
Note: Final dimensions are subject to the specific design; certified GA drawings should be referenced for engineering purposes.
Remarks:
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This valve is suitable for general service applications. For high‑temperature (>200°C) or highly corrosive media, consider metal‑seated or special alloy versions.
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For actuated versions (electric or pneumatic), an ISO 5211 top mounting flange (F07 / F10, etc.) is available based on torque requirements.
