1. Brief introduction of product:
Fire resistance ventilation cap (referred to as permeable cap) is an important equipment to ensure the safety of gas station, oil tank and so on. There are two types of connection: flange connection and threaded connection.

2. Characteristics:
Fire resistance ventilation cap hat is refractory aluminum plate, shell is cast aluminum. The fire retardant core are stainless steel corrugated board and corrugated aluminum plate which is in line with the requirements of CB-5908-2005 technology. When the tank material expansion or into the oil, namely through the fire resisting core of corrugated board outside the exhaust. When a tank to put oil to the tank suction, and prevent and eliminate all the fire from the tank, ensure safety.

3. Notes for installation:
The ventilation cap should be installed vertically in the tank top, ensuring the pressure internal and external balance. In order to ensure the safety of tank and the gas station.

4. Maintenance and repair:
To check air permeability of the fire resistance corrugated plate of ventilation cap, ensuring the good fire resistance, good air permeability. To loosen screws of breathable cap cover when maintenance and the screw of fixed fire retardant core, taking out the fire retardant core, check the fire retardant core is blocked,deformation or corrosion, should immediately clean or replace the fire retardant core, monthly check two times.

5. Technical parameters: