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MARSTON MN/MO Maxivent Assemblies Bursting Discs The applications for these devices are as diverse as the industries that use them. The selection of the most suitable device can be critical: our extensive range provides the optimum solution. Bursting discs produced by Marston are batch tested in accordance with relevant British or other National and International standards and a certificate is supplied for each batch of discs. MN/MO Assemblies are a Reverse Buckling Bursting Discs which offer extended service life, particularly within pressure cycling duties. Ideal for relief valve protection. Usually a single foil disc which has the pressure applied to its convex side. The dome inverts and is completely expelled from its holder and stopped by an arrestor