| Self releasing seal design |
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| Outline |
| This valve was designed and developed in accordance with API 6D and has been unceasingly improved to meet open/shut requirements for pipeline. This valve is three piece welded body. It is light in weight, strong in strength and compact in structure. It not only saves middle flange, but also reduces overall dimension and outside leaking points. The valve could applied various materials to meet the requirements from customers. It is widely used in gas transportation, pipe net of central heat supply, offshore platform, oil field and chemical plant.. |
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Main parts and material |
| Part name |
Carbon steel |
Stainless steel |
| Body |
WCB、A105、LCB |
CF8、CF8M、304、316 |
| Ball |
A105+HCr |
CF8、CF8M、304、316 |
| Stem |
2Cr13 |
304、316 |
| Bonnet |
2Cr13 |
304、316 |
| Seal ring |
PTFF、BG raphite、 Special harden material |
| Spring |
18-82、17-4PH |
18-82、17-4PH |
| Bearing |
Metal lined with PTEF |
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Main parts and material |
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Design feature
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Design feature
1. Integral welded body
2. Trunnion mounted
3. Spring loaded seat
4. Metal seal or soft seal
5. Double block and bleed
6. Full bore or reduced bore
7. Flanged or welded connection
8. Blow-off proof stem
9. When the valve is full opened or shut, the stem seal could be removed under sufficient pressure in the pipe.
10. Static electric proof
11. Self lubricated bearing
12. Conforming to the latter editions of API 6D, API 6FA, BS 6755 and NACE 01-75.
Optional
1. Emergency sealant injector
2. Extended stem
3. Pipe extended for drain, vent or emergency sealant injector
4. Special coating
5. For underground service
6. Mounted by-passing valve directly
7. Locking
8. Other features and requirements |
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Design feature |
Design feature
1. Integral welded body
2. Trunnion mounted
3. Spring loaded seat
4. Metal seal or soft seal
5. Double block and bleed
6. Full bore or reduced bore
7. Flanged or welded connection
8. Blow-off proof stem
9. When the valve is full opened or shut, the stem seal could be removed under sufficient pressure in the pipe.
10. Static electric proof
11. Self lubricated bearing
12. Conforming to the latter editions of API 6D, API 6FA, BS 6755 and NACE 01-75.
Optional
1. Emergency sealant injector
2. Extended stem
3. Pipe extended for drain, vent or emergency sealant injector
4. Special coating
5. For underground service
6. Mounted by-passing valve directly
7. Locking
8. Other features and requirements
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Design feature |
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Connection dimensions and weight |
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Connection dimensions and weight |
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Connection dimensions and weight |
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Connection dimensions and weight |
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Connection dimensions and weight |
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Connection dimensions and weight |
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