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Custom Single port air exhaust valve ductile iron PN16 Supplier, Factories
Product Description
Product Specifications
| 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.
Key Advantages
1. 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
2. High Exhaust Efficiency
- 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
3. Dual Protection Function
- Normal exhaust operation
- When the pipeline is under negative pressure, it will automatically air in to prevent the pipeline from being sucked and damaged
Material Specifications
| Component | Material Details |
|---|---|
| Body, bonnet | Cast iron HT200 / Stainless steel / Carbon steel |
| Floating ball | 304 Stainless steel Vent: H59 Steel H59 brass |
| Sealing ring | NBR |
| Elastic screw | A3 |
Main Dimensions
| DN (mm) | D | D1 | D2 | ϕ | H |
|---|---|---|---|---|---|
| 15 | 95 | 65 | 45 | 135 | 210 |
| 20 | 105 | 75 | 55 | 135 | 210 |
| 25 | 115 | 85 | 65 | 135 | 210 |
| 40 | 140 | 115 | 80 | 150 | 210 |
| 150 | 160 | 125 | 100 | 150 | 210 |
Packaging Details
Standard export wooden case packaging
Frequently Asked Questions (FAQ)
Q1: What is the main application of this single port air exhaust valve?
It is primarily designed for large-diameter, medium, and high-pressure water pipeline networks to discharge trapped air automatically during pipeline filling and operation, preventing water hammer and maintaining stable pressure.
Q2: What temperature range can this air exhaust valve withstand?
The valve operates efficiently within a working temperature range of -20°C < T < 120°C.
Q3: Why is a flange connection preferred over threaded connections?
Flange connections provide a much firmer seal and stronger structural strength, making them far safer and less prone to loosening or leaking under higher pressure and larger pipe diameters.
Q4: How does the valve protect against negative pressure?
When negative pressure occurs inside the pipeline system, the valve automatically admits external air to eliminate vacuum conditions, preventing pipeline collapse or vacuum damage.
Q5: What materials are available for the valve body?
The valve body and bonnet can be manufactured in Cast Iron HT200, Stainless Steel, or Carbon Steel, paired with a 304 Stainless Steel floating ball and NBR sealing ring.
Q6: What sealing level does this valve guarantee?
This valve features investment casting workmanship and a single-directional sealing design, achieving zero leakage under specified operating pressures.
