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Product Description
Type AA Circular Gooseneck Ventilator with Welding Angle Neck
This ventilator looks like a goose's neck, so called gooseneck ventilator, it is usually used on oil tank or exposed deck.
Standards for such marine ventilators here are CB/T 4220-2013 and its previous version CB/T 296-1999，they are equal to other standards from other countries.
Type AA is circular tube with welding angle neck, is made of marine grade or seamless steel, to ensure reliability and durability.
Data sheet of Type AA circular gooseneck ventilators:
| DN | Vent Pipe | Cover | Packing | Pressure Plate | Head Screw | Turnbuckle | Weight kg | |||||
| D | t | D1 | t1 | D1 | D2 | D2 | D3 | D4 | ||||
| 100 | 108 | 4 | 118 | 6 | 118 | 48 | 78 | 63 | 4 | 1 | 20.7 | |
| 114 | 6 | 124 | 8 | 124 | 54 | 84 | 69 | 31.7 | ||||
| 8 | 37.5 | |||||||||||
| 150 | 159 | 4.5 | 170 | 6 | 170 | 100 | 130 | 115 | 6 | 3 | 38.9 | |
| 168 | 6 | 178 | 8 | 178 | 108 | 138 | 123 | 48.9 | ||||
| 8.5 | 57.6 | |||||||||||
| 200 | 203 | 6 | 213 | 6 | 213 | 143 | 173 | 158 | 8 | 59.4 | ||
| 219 | 229 | 8 | 229 | 159 | 189 | 174 | 61.6 | |||||
| 8.5 | 77.8 | |||||||||||
| 250 | 245 | 6.5 | 255 | 6 | 255 | 185 | 215 | 200 | 10 | 75.6 | ||
| 273 | 283 | 8 | 283 | 213 | 243 | 228 | 91.2 | |||||
| 8.5 | 103.5 | |||||||||||
| 300 | 299 | 7.5 | 309 | 6 | 309 | 239 | 269 | 254 | 12 | 104.3 | ||
| 325 | 335 | 8 | 335 | 265 | 295 | 280 | 113.8 | |||||
| 9 | 132.5 | |||||||||||
| The weight is based on the height H as 900mm, does not include Weight of H1 | ||||||||||||
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