Continental Disc”s UNISERT rupture disc holder assembly is a flat-seat rupture disc holder that provides good sealing capability and allows for variable rupture disc design options in a single-holder outfit. In the event there is a change in system operating requirements, the UNISERT assembly permits utilization of various rupture disc types in order to meet a range of burst pressures. Thus, the type of rupture disc can be changed without the need to replace the existing holder assembly. The assembly is available in nominal sizes ranging from one inch through 36 inches (25-900 mm) for installation between ANSI, DIN, or JIS class companion flanges. A variety of materials of construction are also available.