Purpose of Airlocks Spaces

[aungkyawtun]

Dear All,
Could you men kindly let me have an idea about airlock spaces for HVAC field.

 

[zeusfaber]

Do you mean the double-hatch-with-a-small-space-in-between arrangement that separates the air-conditioned interior of a ship from the climate outside, so that there is always a closed hatch to stop the heat from pouring in, even when people are going in and out?

A.

 

[aungkyawtun]

Thks Zeusfaber.I think that is for the purpose to keep both pressure and heat resource

 

[lancer360]

The double hatch is often used with hazardous area classification. One method a client of mine uses in a hazardous area is to pressurize the inside of their manned container with air from a clean intake vent mounted outside the hazardous area. This pressurization acts to keep any explosive or hazardous vapors from entering the container in the event of an leak. This way everything inside the container does not have to have some type of protection for operating in a hazardous environment. Depending on the classification area, the power inside the container or building must be on a switch related to the inside pressure. For Zone 2 applications, it is on a delay with an alarm so if pressurization is lost I think you have 30 seconds before the power is cut. You can often get away with a single hatch in this application. In Zone 1 I think you have to cut power immediately if you lose pressurization, therefore you need to have a double hatch arrangement to maintain positive pressure.