DUUN PA20 Manuel d'instruction - Page 12

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Gas hazard

1. Measures and points in connection with slurry gas.

2. Extraction fan in the basement contributes to negative pressure and extracts the gas.

3. If there is an open connection between the cellar and the animals housing, the grates can

be covered with plastic to contribute to negative pressure when an extraction fan is used. A

gas-tight connection between the animals housing and the basement provides greater

security, especially when combined with an extraction fan in the basement.

4. Stir under wind - if possible with open windows and doors and closed gate.

5. If the discharge from stirring flows into the surface of the slurry storage, strong gas

development occurs - especially in the starting phase. This is due to mixing of air and

slurry mass.

6. Open doors in the barn and the gas will have a low outlet in the farm building itself.

7. Use a gas meter at all times in the animal rooms during slurry pumping. We believe this is

absolutely necessary regardless of the type of pump and whether or not you have a tight

connection.

8. Avoid unnecessary stay near the shaft and propeller during slurry release/stirring.

We therefore recommend the IBT article (Department of Technical Sciences ÅS/NLH) no.

33/87 "measures against slurry gas poisoning" for more details.

9. Never stir in calm and windless weather!

10. Ensure proper ventilation in animals housing. Let all fans run at full blast, remember, all

doors and windows must also be opened.

11. Make sure that ventilation fans do not draw air from the pump inside. If there are openings

in the gate or pump sump and the wind direction blows against these, slurry gas can be

forced from the basement up into the barn.

12. Do not stand near the filling opening of the transport tank during filling, or in the pump pit

during stirring.

13. Never enter animals housing where there may be suspicion of slurry gas without a gas

mask with gray filter B. Remember that there must be enough air present even when you

use a mask!

14. Never go down into a slurry cellar or tanker without fresh air equipment.

15. If possible, agitation should be carried out when there are no animals inside.

16. Stir gently. Remember that new equipment can cause the effect to increase so that the

stirring becomes more powerful and the risk of a gas accident increases.

Points 9-16 ref. Agriculture's HSE service.