Flame retardant cap is an essential safety component in the storage of petroleum products, which is widely used in the process of storage and operation of petroleum products. The filter core of this product is made of stainless steel cold sheet. Corrosion resistance, can meet the need of oil storage and ventilation. Breathable cap components designed for the overall independent, one curing, to ensure that the size of the bellows is stable, easy to clean. Fire resistance ventilation cap is for the gas station, a small tank ventilation pipe designed to upgrade products, it adopts stainless steel roof cap, with the middle element standard, keep it in enough permeability on the basis of compact structure, light weight, small volume, convenient maintenance and replacement.

Shell material	Carbon steel, stainless steel
Flame retardant core material	Stainless steel anti fire ripple plate
Seal material	Oil resistant asbestos rubber, PTFE
Explosion proof grade	BS5501：IIA、IIB、IIC
working temperature°C	≤480
Nominal pressureMPa	0.6-5.0（150-600Lb）

Fire resistant breathable top cap cap made of fireproof aluminum, cast aluminum shell. Resistance core stainless steel corrugated plate and two aluminum corrugated board, in accordance with the technical requirements of CB-5908-2005. When the oil tank is expanded or into the oil, the exhaust gas is discharged through the corrugated plate of the fire blocking core. When the oil tank to the outside and inside the tank to inhale, and to prevent and eliminate all sources of fire, to ensure the safety of the tank.

DN	L	H
40	180	160
50	180	160
80	210	125
100	250	155
125	290	175

The ventilation cap should be installed vertically on the top of the tank to ensure the balance of the pressure inside and outside the tank. To ensure the safety of the tank and gas station.