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Usage

Manhole cover isinstalled on the top of oil tanker. It is the internal inlet of loading,checking vapor recovery and tanker maintenance. It can protect the tanker fromemergency.

Normally, thebreathing valve is closed. However, when load and unload oil externaltemperature changes, and the pressure of tanker will change such as airpressure and vacuum pressure. The breathing valve can automatically open at acertain air pressure and vacuum pressure to make the tank pressure in normalcondition. If there is emergency like roll over situation, it will automaticallyclose and it also can avoid the tanker explosion when in fires. As theemergency exhausting valve will automatically open when tank truck interiorpressure increases to a certain range.

  • product details


Material

Body: Steel

Pressure handle:Steel

Exhaust valve:Aluminum alloy

Safety button:Stainless steel

Seal: NBR

Feature

1.    Eachmanhole cover emergency exhausting valve includes a breathing valve.

2.    Thebreathing valve is installed as required to make the tanker ventilated.Different pressure settings suit different operation requirements.

3.    Emergencyexhausting valve and breathing valve has automatic sealing to prevent dangerand needless oil spillage.

4.    Doubleopen allows safe release of remaining gas before fully opening the cover board.

5.    Tworeserved blind holes on the main cover can be installed with vapor recoveryvalve and optic sensor.

6.    Accordingto EN13317:2002 standard.


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