Size:DN25~DN600
Pressure range:0.25-5.0Mpa
Material:Carbon steel,304,316L stainless steel
Flame retardant core:304,316L stainless steel corrugated plate
Explosion proof level:IIA,IIB,IIC
Flange standard:hg20592-97 PN1.0 (customizable)
Surface treatment:sy7511-87 and api2000
Breathing manhole is a safety emergency ventilation device installed on a storage tank of- petroleum,chemical and other materials.It is usually used together with the fire-retardant breathing valve, which can not only avoid the accident caused by sudden overpressure or vacuum in the tank caused accident, but also play a role of safety fire-retardant.It is an ideal device to protect the safety of tanks in China.
