MRK is a now-discontinued reverse-acting disc that opens upon contact with a knifeblade assembly.
The holder holddown flange or outlet contains a knifeblade assembly which faces the concave side of the bursting disc. Once reversal pressure is reached, the crown of the disc is reversed and the disc comes in contact with the knifeblade assembly and is cut open, providing instant pressure relief.
The specific technology of manufacturing and activation of rupture discs with knifeblades has been serving pressure protection applications worldwide since the 1960s. However, the condition of the knives (e.g., due to corrosion) affects the pressure at which the disc will be reliably breached, and the security of the equipment protected. For this reason this technology was gradually and significantly surpassed in performance and reliability specifications by "reverse-acting buckling" technology, i.e. by bursting discs without the need for a knifeblade arrangement to open the disc under activation conditions.
Alternatives, replacements, and successor models
- Fike RD300 Reverse-Acting Rupture Disc: suitable for most common industral pressure-relief applications, high burst-pressure capacity.
- Fike RD320 Reverse-Acting Rupture Disc: accurate and reliable burst pressure protection in most chemical and refinery applications, available in corrosion-resistant materials.
- Fike RD500 ATLAS Reverse-Acting Rupture Disc: high pressure capability, 95% operating ratio, for liquid or vapor service, back pressure resistance, unrivaled cycling capability.
- Fike RD520 AXIUS Reverse-Acting Rupture Disc: designed to be used in aggressive chemical and pharmaceutical applications, available in corrosion-resistant materials and with the tightest tolerances available.
- Fike SRX Rupture Disc: only for use with vapor services, with superior service life in heavy pulsating and cyclic duty, and reliable performance under less-than-ideal installation conditions.
Accessories
