Rupture Disks

Rupture Disks (Bursting discs)

The Reverse Buckling disk represents the best in rupture disk (bursting disc) technology.

Invented by BS&B, our range of reverse buckling products provides a pressure relief solution for burst pressures ranging from a few inches of water column / a few millibar to over 70,000 psig / 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 often allowing the use lower cost valve trim.


The LPS Rupture Disk (Bursting Disc) was developed to provide low burst pressures from 5 psig (0.35 barg) using reverse buckling rupture disk technology.

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The Sigma EXL™ Reverse Buckling Rupture Disk (Bursting Disc) has been developed to provide the highest operating pressure capability available from a Rupture Disk (Bursting Disc) pressure relief device.

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The STA-SAF System

The Sta-Saf system combines six Rupture Disk (Bursting Disc) types and three safety head options that provide the user with extended service life reverse buckling disk technology.

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The Sure-Saf® System has been developed to provide optimal safety using rupture disk (bursting disc) pressure relief technology.

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The ECO-SAF System

The type ECR reverse buckling Compression Loaded Style Disk provides over pressure relief in either gas/vapor or liquid application.

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FRB Low Pressure

The most advanced rupture disk (bursting disc) technology provides a reverse bucklng style disk in sizes less than 1 inch (25mm) and in extremely low pressures.

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Rupture Disk (Bursting Disc) and Safety Relief Valve Combination

The ASME Pressure Vessel Code permits the use of a rupture disk (bursting disc) device at both a safety relief valve’s inlet and outlet.

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SKr™ Rupture Disk (Bursting Disc)

The SKR™ reverse buckling disk is designed with a circular score line located at the edge of the domed area on the downstream side of the disk.

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The Bio-Saf range meets the demanding sanitary criteria necessary in today’s pharmaceutical, biotechnology and food processing industries.

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SKR-U Reverse Buckling Disk

The SKR-U™ rupture disk (bursting disc) is partnered with the UR-2 safety head to provide high integrity reverse buckling rupture disk (bursting disc) technology in a threaded union type holder.

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GCR-S™ Reverse Buckling Disk

The type GR-CTM outlet fitting with industry standard connections provides quick and easy installation of the GCR-STM reverse buckling disk onto existing standard sanitary inlet ferrule.

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MRB High Pressure

For high pressure applications. MRB (The Machined Reverse Buckling Rupture Disk (Bursting Disc)) offers a one-piece design including both disk and housing.

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A new one piece disposable rupture disk (bursting disc) assembly for isolating safety-relief valves. For retrofit with fixed piping.

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Forward acting, or conventional rupture disks (bursting discs) have been a mainstay in process applications since BS&B developed the first rupture in 1931. Developed in 1934, the Type B disk, the “granddaddy” of all rupture disks (bursting discs) 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 overpressure.

For tank car applications, the ITC disk protects intermodel tank containers while the SR-TC is a surge resistant disk for railroad took cars and over-the-road trailer service industry.

A wide range of standard rupture disk (bursting disc) assemblies is available for your specific application. These Threaded and Welded Assemblies are discarded after disk rupture. Customized designs are available for customer applications that cannot be met using standard assembly designs.

Solid Metal Rupture Disk (Bursting Disc) Type B

As the pressure increases on the tension-loaded disk, the seating design allows the dome to thin out until it can no longer withstand the pressure.

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Reliable overpressure relief is assured with components which cover a wide range of applications and service pressures.

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ITC Cargo Gard

A unique Rupture Disk (Bursting Disc) specifically designed for protection of intermodal tank containers and to conform to the latest norms IMO, ADR, RID, US DOT, DOT Blue Book and ISO.

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Assemblies Custom Rupture Disk (Bursting Disc)

Many customer applications cannot be met using standard rupture disk (bursting disc) and safety head designs.

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Composite Rupture Disk (Bursting Disc) Type D

The Type D Composite Bursting Disc consists of a slotted metal top section and a plastic or metal seal membrane located at the concave or pressure side of the top section.

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VAC-SAF™Rupture Disks

The VAC-SAFTM System rupture disks offer two-way relief to provide maximum protection of gas or liquid storage vessels and plant from damage caused by excessive vacuum or over pressure.

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SR-TC Rupture Disk

A surge resistant rupture disk (bursting disc) for railroad took cars and over-the-road trailer service Industry.

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JOLAC ENGINEERING SDN BHD (“JOLAC”) was incorporated as private limited company in Kuala Lumpur, Malaysia under the Companies Act 1965 on 16th December 1982.