Internally Operation Mushroom Ventilators with Deflector Hood CB 455-1965 Type B

Internally Operation Mushroom Ventilators with Deflector Hood CB 455-1965 Type B

Mushroom with deflcetor serial Ventilators are installed on deck or Ballast water tank and fuel oil tank washing sewage, etc for natural ventilation.

CB/T 445-1965 Mushroom Ventilation with deflctor hood have two two types different in location of adjusting handwheel, external and internal type, each can reach the purpose of adjusting the opening size. Type B is internally opening and closing model.

Process requirements

1. Surface: should be flat and smooth, without sharp edges, distortion, or skew.

2. Size error:  ±3mm, and the deviation of the verticality is 2/h1000 (h is the height of the ventilator cylinder)

3. The welding surface: free of cracks, slag inclusions, burn-through, and unfused defects.

4. The opening of the weather-tight cover of the fungus-shaped ventilator for ships should be flexible, and the movable part should be coated with neutral lubricating grease.

5. Derusting: the internal and external surfaces of the steel parts of the fungus-shaped ventilating cap should reach the Sa2 level or St2 level specified in GB/T8923, and then two antirust primers.

Structure descriptions:

1. Vent head

2. Cover

3. Watertight cover

4. Axial

6. Rubber mat

7. Deflctor

8. Handwheel

9. Sleeve

Type B CB/T 445-1965 Models: