Model KSEP Emergency Vent and manhole cover opens to greatly increase the venting capacity of petroleum storage tanks when the internal pressure rises above the setpoint.
It remains closed tightly at all internal pressure below the settings. This unit also provides easy access into the tank the most common source of this internal pressure is fire exposure.

Type KSEP provides emergency pressure relief only.
The vessel's breather valve must supply vacuum relief requirement.
The type KSEV is the same as the KSEP and in addition offers a spring loaded vacuum relief valve as an integral part of emergency pressure relief cover assembly.