STD Rupture Disc

Standard Rupture Disc

The STD rupture disc is a solid metal, prebulged differential pressure relief device that provides instantaneous full opening within milliseconds of an overpressure situation. Use it to protect equipment, vessels, and systems from overpressure conditions.

The STD is ideal for static, pulsating, or cyclic operation conditions but requires a vacuum support to withstand vacuum.

The STD’s high-visibility flow direction tag ensures easy installation, correct orientation, and at-a-glance inspection. All STD discs with the (LL) seating for insert holders include an attached flow direction tag. Other LaMOT discs include a detached tag.

Nominal size range: 1/4″-12″ (13-300 mm)

Seating configuration: 30˚ seat
Ideal for use in full bolted, insert, and union disc holders.
Also available for screw-type holders and throwaway assemblies – see
Rupture Disc for Screw-Type and Throwaway Holders

Available in light lip or heavy lip designs – see Table 1, Usage for Heavy-Lip
Seating Design

Burst pressure range: 3-6,000 psig (0,207-414 barg)
Table 4 – Maximum/Minimum Burst Pressures for Standard Rupture Discs at
72˚ F (22˚ C)
Table 2A – 
Burst Tolerance and Maximum Recommended Operating

Operating temperature: Up to 1,000°F (538° C)
Dependent on construction materials – see Table 3, Maximum Temperature
for Rupture Disc Materials, Liners, and Coatings

Service: Gas, vapor, or liquid

Manufacturing range: See table 2, Manufacturing Ranges
Special and reduced manufacturing ranges are available upon request.

Available in a variety of materials to resist corrosive media and atmospheric conditions.

Specified and MIN/MAX Rating Types are also available.

We manufacture options and accessories to ensure our rupture discs perform in any environment. Consult a representative if you aren’t sure which you need.

This disc is available to be cleaned for oxygen or chlorine service.

Corrosion resistance
We provide corrosion-resistant fluoropolymer disc liners and coatings when necessary. Other protective materials available on request.

Dent protectors
Guard your rupture disc with a dent protector if the outlet dome (vent side) is exposed or at risk of damage.

Get a tight seal, even on scratched or pitted disc holders, by installing a gasket.

Handling supports
Improper handling during installation can affect your disc’s burst pressure setting. Use handling supports when installing thin or delicate rupture discs to prevent damage.

Protective rings
Prevent damage to fragile rupture discs and delicate liners from foreign material in the seating area by adding a protective ring.

Vacuum supports
Protect your rupture disc from vacuum conditions with a vacuum support. Consult your LaMOT rep if you need to protect against back pressure higher than 14.7 psig (1,01 barg).

  • When ordering a rupture disc that will encounter vacuum conditions, please specify the exact conditions.
  • We manufacture our vacuum supports to be an integral part of the rupture disc.

Vacuum supports are permanently attached to ensure proper installation.

The LaMOT Brand Standard Rupture Disc is available in a 30° angular “Light-Lip” seat and a 30° angular “Heavy-Lip” seat. Size and rupture disc holder bolting class determine the seat design. Refer to Table 1 for information on application of Heavy-Lip seating. Seating not indicated in Table 1 as Heavy-Lip, will be Light-Lip.


We’ve spent decades refining our manufacturing processes with efficiency and agility in mind. We’re ready to put our methods to work for you.