BS&B SRD / SRD-L reverse buckling disk

The SRD and SRD-L are two variants of the same reverse buckling disk: the SRD is calibrated for gas or vapour, the SRD-L for liquid-full systems, where the absence of a compressible medium changes how the dome reverses and opens. Choosing the right variant is what guarantees a full opening in liquid service, a point that is easily overlooked when a disk is selected on pressure alone.

Both cover a wide pressure span up to 51.7 bar in all common sizes, run at 90 % of the burst pressure, resist full vacuum and open without fragmentation. Aluminium is a standard material, which is useful for low burst pressures and for media where nickel alloys are not needed.

Selection data we need

Whether the system is gas, vapour or liquid-full at the disk, size, burst pressure and temperature, operating pressure, medium and flange rating.