Reverse Acting Knife Blade Rupture Disk (YD Series)

The convex of reverse acting rupture disc is on the high pressure process side. When the solid metal disc is compression-loaded, the disk reverses with the knife blades on the upper holder cutting it to relieve pressure.

Note: Types and Specifications of Safety devices need to be calculated and selected according to the specific working conditions of the protected equipments and systems before quotations. 

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Technical features:

• Non-fragmentation design

• Operating ratios up to 90% of the low end of burst tolerance

• Suitable for gas or liquid service 

• Standard manufacturing design range and total tolerance ensures marked rating on disk tag does not exceed the MAWP of equipment

• Withstands full vacuum without additional support 

• Wide range of standard and exotic materials available 

• Sizes from 25mm to 600mm 

• Burst ratings from 0.5barg to 150 barg

• Use of rupture discs in combination with safety valves

• 3-dimensional stainless steel tag engraved with complete disc specifications

Options

 •Fluoropolymer liners can prevent corrosion of rupture discs 

Note: The maximum temperature rating of rupture disks supplied with liners is lower than the base disk material. 

Protection of Safety relief valves

 • Use of rupture discs in combination with relief valves can prevent corrosion of the relief valve internals.

 • Tell-Tale Assembly：Pressure Gauge、Tee、Excess Flow Valve、Tube