BS&B Safety Systems VD-U-15 Rupture Disk Type AV

The BS&B Safety Systems VD-U-15 Rupture Disk Type AV is a 4-inch (100 mm) low-pressure, two-way acting rupture disk from the AV family, rated at 3.5 psig at 72°F (22°C) to protect atmospheric vessels from overpressure in venting or process lines. Its flat, gasketed, holderless design yields the same burst pressure in both directions and is vacuum resistant with optional fluoropolymer liner, while optional ASME UD marking or CE certification reflects BS&B's compliance options for industrial installations. The AV disk family covers sizes from 1 inch to 72 inches, and the 1138842 VD-U-15 configuration specifies a 4-inch disk with the 3.5 psig @ 72°F rating, suitable for installations that rely on direct venting or safety head assemblies to relieve excess pressure.