Technical Data Sheet
Product: Oxygen Service Globe Valve
Size / Rating: 1″ – Class 600 (RF / BW)
- General Description
This globe valve is specifically designed for oxygen service, manufactured and cleaned in strict accordance with oxygen‑compatible requirements. The body is constructed of fully austenitic stainless steel, featuring an anti‑static design and rigorous degreasing procedures to ensure safe and reliable operation under high‑pressure oxygen conditions. It is widely used in air separation units, oxygen transmission pipelines, steelmaking, and chemical plants where safety is paramount.
- Basic Specifications
Tham số | Đặc điểm kỹ thuật |
Kích cỡ | 1″ (DN25) |
Pressure Class | Class 600 (PN100) |
Design Type | Globe Valve (Bolted Bonnet) |
End Connections | Flanged RF (Raised Face) / Butt Weld (optional) |
Flange Standard | ASME B16.5 |
Phạm vi nhiệt độ | -29°C ~ +200°C (depending on seating material) |
Phương tiện truyền thông | Oxygen, Nitrogen, Inert Gases |
- Material Specification
No. | Part Name | Standard Material | Nhận xét |
1 | Thân hình | CF8M (316 SS) / F316L | Austenitic stainless steel |
2 | Bonnet | CF8M (316 SS) / F316L | Same as body |
3 | Đĩa | 316L + Stellite hardfacing | Wear and erosion resistant |
4 | Ghế | Integral Stellite overlay on body | No loose seat, eliminates risk of loosening |
5 | Thân cây | F316L / 17-4PH | High strength, corrosion resistant |
6 | Packing | Flexible Graphite + anti‑extrusion rings | Low emission, oxygen compatible |
7 | Stem Nut | Aluminum Bronze / Stainless Steel | Anti‑galling, spark resistant |
8 | Handwheel | Carbon Steel / Stainless Steel | Locking device optional |
- Special Design Features for Oxygen Service
4.1 Degreasing & Cleaning
- 100% degreasing – All components are thoroughly degreased and cleaned prior to assembly to ensure no oil, grease, or organic residues remain.
- Cleanliness verification – Inspected under UV light and tested for residual content in accordance with ASTM G93 or CGA G‑4.1.
- Packaging & labeling – Valves are packaged in clean, sealed bags and clearly labeled “Oxygen Service” or “Degreased”.
4.2 Material Compatibility
- All wetted metal parts are austenitic stainless steel (316/316L) with excellent corrosion and oxidation resistance.
- Packing and gaskets are non‑combustible, oxidation‑resistant flexible graphite, compatible with oxygen service.
4.3 Anti‑Static & Fire Safety Design
- Anti‑static device – A grounding spring ensures electrical continuity between the stem and body, preventing static charge accumulation.
- Blowout‑proof stem – Stem is designed with a blowout‑proof feature to prevent ejection in the event of packing failure.
- Fire safe – Optional design meeting API 607 requirements.
4.4 Flow Path Design
- Smooth, pocket‑free flow path minimizes particle accumulation and high‑velocity localized flow.
- Globe valve design with flow “under the disc” ensures tight shut‑off.
- Testing & Standards
Test / Standard | Reference |
Design & Manufacture | ASME B16.34 / BS 1873 |
Flange Standard | ASME B16.5 |
Pressure Testing | API 598 |
Shell Test | 1.5 × Class 600 (15.0 MPa) |
Seat Leakage Test | 1.1 × Class 600 (11.0 MPa) |
Degreasing Standard | ASTM G93 / CGA G‑4.1 |
Fugitive Emission (optional) | ISO 15848‑1 / TA‑Luft |
Fire Safe (optional) | API 607 / ISO 10497 |
- Installation & Maintenance Notes
6.1 Installation Precautions
- Flow direction – Install according to the flow arrow on the body (flow under the disc).
- Oil‑free handling – All tools, gloves, and sealing materials must be clean and oil‑free. Do not use oil‑based lubricants.
- Flange connection – Use oil‑free gaskets (spiral wound stainless steel recommended). Tighten bolts evenly in a cross pattern.
6.2 Operation & Maintenance
- Hoạt động – Operate the handwheel smoothly and slowly to avoid pressure surges or friction sparks.
- Periodic inspection – Regularly inspect the packing area for leakage. If slight leakage occurs, carefully tighten the packing gland.
- Maintenance – After any repair, the valve must be re‑degreased before returning to oxygen service.
- Approximate Dimensions (for reference)
Dimension | Value (mm / inch) |
Face‑to‑Face Length (L) | ~216 mm (8.5″) |
Flange Outer Diameter | Per ASME B16.5 Class 600 |
Flange Bolt Circle | Per ASME B16.5 Class 600 |
Overall Height (H) | ~280 mm |
Handwheel Diameter | ~150 mm |
Note: Final dimensions are subject to the specific design; certified GA drawings should be referenced for engineering purposes.
Remarks:
- This valve is dedicated to oxygen service and must not be used in non‑degreased piping systems.
- For actuated versions (electric or pneumatic), an ISO 5211 top mounting flange is available; the actuator and coupling must also be degreased.
- For high‑pressure oxygen service (> 3 MPa), a slow‑closing actuator is recommended to avoid pressure surges.
CAM KẾT:
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