SRL is a type of bursting disc which is reverse-bulged, so it means that a crown of disc is conversely convex. Also, due to circumference weakening and convex shape a full opening is enabled.
No knife blades are required. It can be performed in materials such as: 316 SST, Hastelloy®, tantalum and others, so it is ideal for applying in corrosive media. It protects PRV as well.