Stainless Steel 3-Piece Socket Weld Ball Valve
The Stainless Steel 3-Piece Socket Weld Ball Valve is a highly versatile and robust isolation valve designed for secure, permanent installation in pipelines carrying liquids, gases, and corrosive fluids. The 3-piece body construction allows the central valve body to be easily removed for maintenance or seat replacement without disturbing the welded end connections.
The Socket Weld (SW) ends provide a high-integrity, leak-proof connection suitable for high-pressure and high-temperature service.
⚙️ Technical Specifications
| Parameter | Specification | Note/Standard |
| Nominal Pressure (PN) | 1.6 – 6.4MPa | ≈ Class 150 – Class 600 |
| Applicable Temperature | -20°C to 185°C | Wide operational temperature range. |
| Applicable Media | Water, Oil, Gas, and certain Corrosive Fluids (W.O.G) | Versatile media handling. |
| Weld Standard (BW) | GB/T1224, ASME B16.25 | Butt Weld standards apply to SW size constraints. |
| Connection Type | Socket Weld (SW) | High-integrity, permanent connection. |
| Body Structure | 3-Piece | Allows easy in-line maintenance. |
🛠️ Main Parts Material (Stainless Steel Model Focus)
| NO. | Part Name | Material (Stainless Steel) | Note |
| 1 | Valve Body | CF8M (Equivalent to SS316) | High corrosion resistance |
| 2 | Seat | PTFE (Polytetrafluoroethylene) | Excellent chemical and temperature resistance |
| 3 | Body Cap | CF8M (Equivalent to SS316) | |
| 4 | Ball | SS316 | Core flow control element |
| 5 | Stem | SS316 | Blow-out proof design (implied) |
| 6-16 | Bolts, Nuts, Gaskets, Packing | SS304 / PTFE | All external and internal components are corrosion-resistant. |
Note on CF8M: This is the Cast Stainless Steel grade equivalent to Wrought SS316 for superior corrosion resistance, especially against chlorides.
📏 Main Dimensions (Socket Weld) – Unit: mm
| Parameter | Size |
|---|---|
| Size | 1/4′′, 3/8′′, 1/2′′, 3/4′′, 1′′, 1 1/4′′, 1 1/2′′, 2′′, 2 1/2′′, 3′′, 4′′ |
| L (Face-to-Face) | 68, 68, 72, 85, 90, 112, 120, 145, 185, 215, 270 |
| H (Height) | 50, 50, 60, 64, 71, 78, 86, 95, 130, 148, 173 |
| D (Orifice/Bore) | 11.6, 12.7, 15, 20, 25, 32, 38, 50, 65, 80, 100 |
⭐ Key Advantages
- High Integrity Connection: The Socket Weld connection creates an extremely reliable, permanent, and leak-free joint that is ideal for high-pressure, high-temperature, or toxic fluid applications where seal integrity is non-negotiable.
- Easy Maintenance (3-Piece Design): The valve can be quickly disassembled from the pipeline by removing the body bolts, leaving the two welded end pieces in place. This facilitates fast and inexpensive maintenance (e.g., seat and seal replacement).
- Full Flow: Ball valves are inherently full-port (or near full-port, indicated by D value close to size), providing unrestricted flow and minimal pressure drop.
- Corrosion Resistance: The extensive use of SS316 (CF8M) and SS304 materials ensures excellent durability against corrosive media.
This Stainless Steel 3-Piece Socket Weld Ball Valve offers the best combination of permanent connection integrity and in-line serviceability.
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