When the tank is exposed to fire or other emergency conditions, the ordinary breather valve cannot meet the discharge capacity of the tank. In order to prevent the tank from bursting, the emergency relief valve is used. 8170, 8178 emergency pressure vacuum relief valve guide to prevent valve cap displacement, and provide guide.

Specifications 16 ", 18", 20 ", 24"

Positive pressure setting 0.6 ~ 6.9kpa

Negative pressure setting -0.2 ~ -1.7kpa

Design and inspection standard api2000

Flange standards: ANSI B16.5, en1092, JIS, Hg / t20592 ~ 20615, GB / t9113, etc