Bellows stop valve for ammonia
Abbreviation: bellow ammonia stop valve
Model: AWJ41F-40C AWJ41F-40P
Introduction of bellows stop valve for ammonia:
The bellows stop valve for ammonia is added with a bellows assembly at the valve stem of the valve chamber of the ammonia stop valve, which can effectively prevent the valve stem from opening and closing frequently and the sealing packing failure. The bellows seal and the packing seal work together to form a double seal, which ensures the reliability of the axial dynamic seal. The packing is easy to leak in the process of long-term use, and the loading packing compression mechanism is used in the design to make the packing seal more durable and reliable.
Structural features of bellow ammonia stop valve:
1. Double sealing design (bellows+packing) If the bellows fails, the valve rod packing will also be avoided.
2. Reasonable structure, reliable sealing, excellent performance and beautiful appearance.
3. Small fluid loss, reduce energy loss and improve plant equipment safety.
4. Sealing surface PTFE, corrosion resistance, good friction resistance, long service life, reduce maintenance times, and reduce operating costs.
5. Rugged and durable bellows sealing design ensures zero leakage of valve rod and provides maintenance free conditions.
6. The valve rod is quenched and tempered and the surface is nitrided, with good corrosion resistance and friction resistance;
7. The valve rod lifting position indication is more intuitive.
Technical parameters of bellow ammonia stop valve:
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Nominal diameter
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DN25～DN200
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Nominal pressure
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PN1.6MPa～PN4.0MPa
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Applicable temperature
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-29℃～+120℃ -40℃～+120℃
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Applicable media
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Combustible gas/liquid, ammonia, gas, gas, methanol
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Connection mode
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flange
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body material
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WCB/carbon steel CF8/304 stainless steel CF8M/316 stainless steel
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Structural features of bellows ammonia valve:
1. PTFE packing and bellows are used for double sealing to achieve zero leakage.
2. The bellows shall be overlapped by 2~4 times to prevent valve leakage due to single-layer damage of the bellows and extend the service life of the valve.
3. The corrugated pipe is designed in the inner cavity of the valve cover to avoid direct flushing with the medium and improve the service life of the corrugated pipe.
4. Due to the long design of bellows and large opening height, the main resistance of fluid is reduced and the flow resistance coefficient is small.
5. The middle flange bolt of the bellows valve is made of high-strength alloy steel, with excellent high-temperature creep resistance, safety and reliability.
6. The valve body and valve cover are connected by double headed studs, with simple structure and good process performance.
7. The valve stem nut is surface nitrided to improve surface hardness and wear resistance and prevent seizure.
