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China Suppliers Factory Single Port Air Exhaust Valve Ductile Iron PN16 for Liquid Pipeline Systems
| Valve Type: | Exhaust valve | Structure: | Single port |
| Standard: | BS/API/DIN/JIS | Workmanship: | Investment casting |
| Sealing direction: | Single-directional | Sealing grade: | Zero leakage |
| Temperature: | -20°C < T < 120°C | Operation: | Self-starting |
Characteristics
✅ This air valve adopted flange-connected, installed firmly and sealed well, suitable for large-diameter, medium and high-pressure pipelines, not easy to fall off and leak water.
Advantages
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Firm Connection & Reliable Sealing
The pressure is higher, and it is not easy to loosen and leak.
Suitable for large-diameter, medium and high-pressure pipeline networks, safer than threaded exhaust valves.
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High Exhaust Efficiency, No Suffocation
Single port large channel, rapid and large exhaust during pipeline water injection.
Continuous micro exhaust during operation to eliminate air resistance and water hammer and ensure stable water pressure.
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Both Exhaust & Negative Pressure Protection
Normal exhaust function maintained at all times.
When the pipeline is under negative pressure, it will automatically air in to prevent the pipeline from being sucked and damaged.
Packing
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Standard export wooden case packaging
Frequently Asked Questions
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What is a single port air exhaust valve and how does it work?
A single port air exhaust valve is a device installed on pipelines to automatically release trapped air during water injection and continuously discharge micro air pockets during normal operation. It is self-starting, meaning it operates automatically without manual intervention, ensuring smooth and stable flow within the pipeline system.
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What materials and standards does this air exhaust valve comply with?
This single port air exhaust valve is made from ductile iron and manufactured using investment casting. It complies with multiple international standards including BS, API, DIN, and JIS, making it suitable for a wide range of global pipeline applications.
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What is the operating temperature range for this valve?
This air exhaust valve is designed to operate within a temperature range of -20°C to 120°C, making it suitable for a variety of climate conditions and pipeline environments, including both cold and moderately high-temperature water supply systems.
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Why is a flange connection preferred over a threaded connection for this valve?
Flange connections provide a firmer and more secure installation compared to threaded connections. They are better suited for large-diameter, medium and high-pressure pipelines because they are less prone to loosening and leaking under high pressure, offering greater safety and long-term reliability.
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Can this valve protect pipelines from negative pressure damage?
Yes. In addition to its exhaust function, this valve also provides negative pressure protection. When the pipeline experiences a negative pressure condition, the valve automatically opens to allow air intake, preventing the pipeline from collapsing or being damaged due to suction forces.
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How is this valve packaged for export?
This single port air exhaust valve is packaged in standard export wooden cases, ensuring safe protection during international shipping and handling. The packaging is designed to meet export requirements and protect the product from damage during transit.