Rupture Disc
Reverse Buckling Disks
The Reverse Buckling Disk represents the best in rupture disk (bursting disk) technology. Our range of reverse buckling products provides pressure relief solutions for burst pressures ranging from a few inches of water column/a few millibar to over 70,000 psi/4800 bar.
Burst pressure is accurately controlled by a combination of material properties and the shape of the disk domed structure. By loading the Reverse Buckling Disk in compression, it is able to resist operating pressures up to 100% of minimum burst pressure, even under pressure cycling or pulsating conditions.
Designed for non-fragmentation upon activation, Reverse Buckling Disks are recommended for combination with pressure relief valves to isolate them from normal process conditions, ensuring excellent leak tightness, reduced valve maintenance expenses and allowing the use of lower-cost valve trim.
Forward Acting Disks
The Type B disk, the "granddaddy" of all rupture disks (bursting disks), is still the disk of choice in many applications.
Applying load to the concave side, the disk is subjected to tension forces. Forward acting disks regulate burst pressures by the tensile strength of the material.
For low burst pressures, the Type D disk has a slotted metal top section and a metal or fluorocarbon seal. For higher operating ratios, the scored NU-SAF family of disks is often selected for polymerization processes. Our VAC-SAF line offers protection from excessive vacuum or over pressure.
For tank car applications, the ITC disk protects intermodal tank containers while the SR-TC is a surge-resistant disk for railroad tank cars and over-the-road trailer service industries.
A wide range of standard rupture disk (bursting disk) assemblies is available for specific applications. Threaded and welded assemblies are discarded after disk rupture. Customized designs are available for applications that cannot be met using standard assembly designs.Rupture Disk Holders
Rupture disk holders—consisting of an inlet base flange and an outlet hold-down flange—provide the tight metal-on-metal seal necessary for a rupture disk to function properly and are available in various designs like pre-torqued, insert, double disk, screw type, and sanitary ferrule quick releases.
