Usage
Manhole cover is
installed on the top of oil tanker. It is the internal inlet of loading,
checking vapor recovery and tanker maintenance. It can protect the tanker from
emergency.
Normally, the
breathing valve is closed. However, when load and unload oil external
temperature changes, and the pressure of tanker will change such as air
pressure and vacuum pressure. The breathing valve can automatically open at a
certain air pressure and vacuum pressure to make the tank pressure in normal
condition. If there is emergency like roll over situation, it will automatically
close and it also can avoid the tanker explosion when in fires. As the
emergency exhausting valve will automatically open when tank truck interior
pressure increases to a certain range.
Material
Body: Steel
Pressure handle: Steel
Exhaust valve: Aluminum alloy
Safety button: Stainless steel
Seal: NBR
Feature
1. Each manhole cover emergency exhausting valve includes a breathing valve.
2. The breathing valve is installed as required to make the tanker ventilated. Different pressure settings suit different operation requirements.
3. Emergency exhausting valve and breathing valve has automatic sealing to prevent danger and needless oil spillage.
4. Double open allows safe release of remaining gas before fully opening the cover board.
5. Two reserved blind holes on the main cover can be installed with vapor recovery valve and optic sensor.
6. According to EN13317:2002 standard.
Install the image:
