Active Member
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[China]
Address: China's Jiangsu Province, Yangzhou city Jiangdu District Ding Huo Zhen Industrial Park, Jinjiang Road No. 59
Contact name:HAN
Yangzhou FeiHang Ship Accessories Factory |
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MUSHROOM VENTILATORS FOR SHIP
| Part Name | Material | ||
| Name | Brand | Standard | |
| Hand wheel | cast iron Carbon steel | KHT300-6 Q235-A | GB/T9440-1988 GB/T700-1988 |
| Sealing packing | Neoprene | Tensile strength not less than 14.7MPa, Shore hardness HA35-45 | |
| Indicator stick | Carbon steel structure | Q235-A | GB/T700-1988 |
This standard CB/T295-2000 marine mushroom ventilator is suitable for the design, manufacture and acceptance of ventilators for installation on the open deck of marine vessels.
Marine mushroom ventilator - the form of marine mushroom ventilating cap is mainly divided into:
| Type | Name | Nominal diameter |
| A-TYPE | Internal opening and closing ventilator | DN150-DN350 |
| B-TYPE | External opening and closing ventilator |
DN250-DN1400 |
| C-TYPE | External opening and closing with axial fan ventilator | |
| D-TYPE | Fixed ventilator |
Technical agreement on marine CB/T295-2000 marine mushroom ventilator-marine mushroom ventilating cap:
1. Marine ventilator - The surface of the marine ventilating
cylinder should be smooth and smooth without sharp edges,
distortion and skew.
2. The diameter deviation of the air cylinder and the hood of the
marine ventilator is ±3mm, and the deviation of the verticality is
2/h1000 (h is the height of the ventilating cylinder)
3. The welding surface of the marine mushroom-shaped ventilating
head shall be free from cracks, slag inclusions, burn through, and
unfused defects.
4. The weathertight cover of the marine mushroom-shaped ventilator
should be flexible, and the active part should be coated with
neutral grease.
5. The internal and external surfaces of the steel parts of the
marine mushroom ventilating cap shall be derusted to the Sa2 or St2
level specified in GB/T8923, and then the second antirust primer.
Test method for CB/T295-2000 marine marine mushroom ventilator-marine mushroom ventilating cap:
1. Flushing experiment of marine mushroom-shaped ventilator:
Use a nozzle with a diameter of not less than 12.5, the water
pressure is not less than 0.25Mpa, and then flush with the
ventilator not exceeding 1.5mm. The flushing time is 3min. The
result should be consistent with the "waterless beads in all parts,
the sealing packing is in contact with the air cylinder. The width
of the indentation is not less than 0.5t (t is the thickness of the
cylinder body).
2. Imprint experiment of marine mushroom-shaped ventilator:
At the weathertight sealing packing, evenly apply white powder,
close the weathertight cover, and then open it to check the width
of the indentation of the sealing packing in contact with the edge
of the air cylinder. The result should meet the requirements of
4.7.
3. Appearance inspection of marine mushroom ventilator:
The visual inspection was carried out by visual inspection, and the
results were to comply with the standards.
4. Dimensional inspection of marine mushroom ventilator:
The gauge is used to check the diameter of the air duct and the
hood, and the result should meet the requirements of 4.3.
Marine ventilator - mushroom ventilator is usually marked as:
Marine ventilator A300 CB/T295-2000 (indicate: Type A internal
opening and closing ventilator with nominal diameter DN=300)
Marine mushroom ventilator B300 CB/T295-2000 (indicate: Type B
external opening and closing ventilator with nominal diameter
DN=300)
Marine mushroom-shaped ventilating cap C300 CB/T295-2000 (indicate:
C-type internal opening and closing belt axial fan ventilator with
nominal diameter DN=300)
Marine mushroom vent head D300 CB/T295-2000 (indicate: D type
marine fixed ventilator with nominal diameter DN=300)
