The manhole cover is one of the most essential safety components installed on the top of petroleum t
The manhole cover is one of the most essential safety components installed on the top of petroleum tanker trucks that serves as an emergency vent and pressure relief system, preventing tank rupture by allowing rapid venting in the event of internal overpressure, while also acting as a secure access point for maintenance and inspection. With over 17 years of manufacturing expertise, DESEINOR offers more than 20 specifications of manhole covers, available in aluminum alloy, 304 stainless steel, 316L stainless steel, and carbon steel. Standard sizes include 16-inch and 20-inch diameters, with common inspection port sizes of 250 mm and 300 mm, making them compatible with almost all fuel tanker models used globally.
Each manhole cover is equipped with features such as a blind port for optional installation of an optical sensor, vapor vent valve, dip tube, or other accessories. The design supports safe transport of gasoline, diesel, kerosene, and other light fuels. Selected by major oil companies and transport fleets around the world, our manhole covers are valued for their leak prevention, fire resistance, anti-corrosion performance, and full compliance with international safety regulations.
Product Name | Fuel tanker manhole cover | Application | Emergency Pressure Relief Device |
Model Number | GY801M-500 | Emergency Opening Pressure | 21Kpa~35Kpa |
Material | Aluminum alloy | Maximum Emergency Flow | 7000m³/h |
Nominal Diameter | 16 inches | Working Temperature | -40℃~+70℃ |
Brand Name | DESEINOR | Installation Method | Flange Connecting |
Place of Origin | China | Emergency Fire Vents Standards | NTTC DOT 406 |
Packing Size | |||
L*W*H(CM) | 55X55X24 | ||
QTY/CTN | 2PCS/CTN | ||
N.W(KGS) | 15KGS | ||
The vent delivers an exhaust flow rate of 1,900 SCFH at 3 psig.
Under a vacuum of 1 psig, it provides a flow rate of 4,000 SCFH.
It can be installed directly into standard 10-inch manhole covers, allowing easy integration into existing systems.
The design is lightweight and durable, weighing only 14.4 ounces, making it suitable for rugged fuel transport environments.
Tool-free maintenance and cleaning simplify service operations and reduce downtime.
A built-in dust screen prevents foreign objects from entering the valve core, protecting internal components.
