Fire retardant breathing manhole is developed by our factory according to market demand and with reference to advanced technical data at home and abroad. It is a safety emergency ventilation device installed on the storage tank of petroleum, chemical and other materials
Emergency pressure relief breather valve manhole is a safety emergency ventilation device installed on the storage tank of petroleum, chemical and other materials, usually used with the fire resistance breathing valve, which can avoid accidents caused by sudden overpressure or vacuum in the tank and damage the storage tank. It can also play a safe fire resistance role. It is the ideal device to protect the safety of storage tank in China,Gas flame arrester inline fire arrestor and the product fills the gap in China. The product adopts all-weather sealing structure to adjust the opening and closing of the suction valve disc and pressure relief cover with counterweight. The stainless steel corrugated belt is used as the fire retardant layer to prevent the flame from passing through, and the double drawer mouth is set up to provide convenience for cleaning and replacing the fire retardant layer and shorten the time. In short, the product has the advantages of constant pressure discharge, constant pressure suction, flexible working, safe fire resistance, compact structure, good sealing performance, safety and reliability.
structural representation:
Main technical parameters
Operating pressure Positive pressure: +1765Pa(180mmH20) Negative pressure: 392Pa(40mmH20)
Fire resistance grade: BS 5501: IIA standard 3, use temperature: +60℃ ~ 30℃
Scope of application: Especially suitable for storage materials with nitrogen capped vault atmospheric tank.