Why need fuel tank truck be installed European standard manhole?

In fuel tank truck industry, fuel tank truck oil loading mouth is also known as manhole cover, which is mounted on top of the tank. Such a cover, why should be installed on the tanker? Many people may scanty, just know this little cover to protect the safety of fuel tank truck. Next, we will talk about what you do not know why the installation of the European standard fuel tank truck oil loading mouth. 

European standard fuel loading mouth is mounted at the top of the tank. The main function is built for inner breathing and exhausting. We typically install vapor recovery valve, the amount of hole, anti-flooding probe and other parts in manhole cover. Overfill sensing system at oil loading process, when the liquid level reaches the probe position sensing system will automatically alarm to stop oil loading. Built-in tank breathing valve so that the tanker during the internal pressure is stable, the external pressure balance, it was poured to prevent overflow design allows the tanker remain sealed, emergency exhaust pressure in the tank in case of accident under sharp rise in cases will be automatically opened to release the pressure in the tank, so as to prevent accidents, greatly improve the security of transport of oil. 

The functions and features of European standard fuel loading mouth are as 
follows: 
Respiratory: breathing valve in the pressure inside the tank is higher than the external pressure 6 ~ 8KPa or lower than the external pressure of 2 ~ 3KPa automatically open when the can inside and outside maintain a smooth flow of gas, thereby reducing the pressure inside and outside too much, play a security effect. Breathing valve will be turned off in the tank internal pressure and external pressure difference -2 ~ 6KPa time, so that the tank to maintain proper pressure and to avoid volatilization of the waste oil. 
Prevent dumping spill: In case of unforeseen circumstances make dumping occurs when the tanker, breathing valve anti overflow channel stopper will automatically seal to prevent oil leakage, to avoid further danger. 
Emergency ventilation: When fuel tank truck accident in a high temperature environment, the effective release of pressure in the tank to prevent tank explosion. When 21 ~ 32KPa the tank pressure exceeds the external pressure, emergency exhaust start work, the maximum displacement of 7000m3h, can effectively prevent the oil tank explosion occurred. 

We can set different pressure parameters to the European standard fuel loading mouth according to needs to ensure reliable respiratory function and emergency exhaust function. 

Hubei Changjie especial PurposeVehicle Co. Ltd 
E-mail: cj802@urspv.com 
Tel: 0086-0722-329933