The anti freezing breathing valve is composed of pressure valve and vacuum valve, which is installed on the vent pipe of cargo oil tank. It can open and close automatically with the change of positive and negative pressure of oil and gas in cargo oil tank, so as to keep the air pressure difference inside and outside cargo oil tank within the allowable range. The valve has antifreeze performance and is suitable for cold areas.

PTFE film combination of air cushion valve disc or F-46 material pressure plastic valve disc, durable, outstanding antifreeze performance, is suitable for cold areas worthy of the name of “all-weather” freeze proof breather valve.