The RB-90 Rupture Disk is ideal for primary relief either by itself or installed at the inlet of a safety relief valve. The RB-90 complies with Section VIII Division 1, Paragraphs UG 125 through 134 of ASME Code. Reverse Buckling Disk. Four razor-sharp knife blades cut metal into four equal sections when reverse buckling occurs, providing complete opening without fragmentation. Liquid systems with viscosity similar to water, where a large volume of liquid will be released immediately should overpressure occur.
Valve life is extended by isolating corrosive fluids from internal valve parts.
Reverse Buckling Safety Head mounted at inlet of a safety relief valve. This arrangement permits testing of a valve as shown without disassembly or process shutdown. Safety Heads require preassembly of reverse buckling disk in RB-90 flanges to assure proper seating. Standard RB-90 inlet and outlet flanges are flatfaced. Standard knife blade material is heat treated stainless steel.