Wholesale Double port air evacuation valve automatic release air Manufacturer, Factory
Product Description
Description & Technical Specifications
| Valve Type: | Exhaust valve | Structure: | Double 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
The structure of double port exhaust valve is usually composed of valve body, floating ball, exhaust nozzle, etc. The floating ball is mostly stainless steel, with long service life, safety and reliability.
Core Advantages
Material Specifications
| Component | Material Options |
|---|---|
| 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
| Model | DN (mm) | Main Dimensions (mm) | ||||
|---|---|---|---|---|---|---|
| D | D1 | D2 | L | Z-Φd | ||
| QB2-10 | 40 | 145 | 110 | 85 | 430 | 4-Φ18 |
| 50 | 160 | 125 | 100 | 430 | 4-Φ18 | |
| 75 | 195 | 160 | 135 | 470 | 4-Φ18 | |
| 100 | 215 | 180 | 155 | 500 | 4-Φ18 | |
| 150 | 280 | 240 | 210 | 540 | 8-Φ20 | |
| 200 | 335 | 295 | 265 | 700 | 8-Φ20 | |
Packaging & Delivery
Standard export wooden case packaging
Frequently Asked Questions (FAQ)
The double port exhaust valve is designed to rapidly vent trapped air during system startup, automatically release small dissolved gas pockets during continuous operation, and allow air intake during vacuum conditions to prevent pipeline collapse.
The main port provides high-volume rapid air discharge when filling water into empty pipelines. The auxiliary port features a micropore mechanism that works continuously under operating pressure to release accumulated trace gases.
No. It operates on a pure mechanical float system driven by internal hydraulic pressure and buoyancy, requiring zero electrical power and achieving low maintenance operation.
The double port exhaust valve is engineered to perform within an operating temperature window of -20°C < T < 120°C.
The valve is manufactured in strict compliance with major international standards including BS, API, DIN, and JIS standard specs.
By utilizing investment casting for precise components combined with a high-durability NBR sealing ring and 304 stainless steel float ball, the unit achieves tight, zero-leakage sealing performance.
