Manholes are installedTankSafety emergency exhaust ventilation device at the top, usually paired with fire extinguishers,Mechanical breathing valveUsed in conjunction, it prevents accidents caused by sudden overpressure or vacuum inside the tank due to unexpected reasons, and also serves as a fire-retardant barrier, ensuring the safety of the storage tank. Particularly suitable for dome-shaped atmospheric tanks sealed with nitrogen for material storage. It features pressure-regulated discharge and intake, flexible operation, fire retardancy, compact structure, good sealing performance, and reliability.

Manholes are categorized asEmergency Pressure Relief Manhole、Flame Retardant Explosion Proof Breathing ManholeManhole on drum top, manhole on drum wallFerrule Flanged ManholeAwaiting.

Manholes are generally made of304、316L stainless steelMade of steel or carbon steel.