System Safety - UHV Burst Disks

ANCORP is proud to announce our new UHV burst disk designed for our customers who require protection from accidental over-pressurization of their vacuum systems. The ASME UD certified overpressure burst disk, high-pressure burst disk, and low pressure burst disk feature all-metal stainless steel construction designed for UHV applications.


Vacuum systems are normally rated for an external load of one atmosphere and should not be exposed to excess positive pressure. For this reason, ANCORP has designed a line of burst disks that help to prevent the accidental pressurization of a vacuum system. ANCORP offers burst disks in CF133 or CF275 metal seal flange connections. Gas recovery port connections are available in CF338 or QF50 flanges.


ANCORP has designed the ASME burst disk to be ASME UD certified and 10CFR851 compliant. Our low-pressure burst disk is designed to be ISO 4126-2 compliant. The high-pressure burst disk provides protection from 15 to 25 PSIG.


Burst disks are constructed with a frustum metal membrane which is capable of sustaining a vacuum load. The low-pressure burst disk will activate if the pressure inside a vacuum system increases to 5 PSIG, while the ASME overpressure burst disk will activate if the pressure reaches 11.5 PSIG, and the high-pressure burst disk will activate if the pressure reaches 25 PSIG.


The burst disk membrane is scored to prevent fragmenting upon rupture, thus protecting personnel and equipment from harm. However, once the disk has ruptured it is no longer usable and must be replaced.


  • Stainless steel body and disk membrane
  • Bakeable to 450°C
  • Protects sensitive components from accidental over-pressurization
  • Protects personnel from harm
  • Protects equipment from costly damage and down-time
  • Optional gas recovery system to prevent gases escaping into the atmosphere
  • Compact design with no moving parts
  • ASME UD Certified to be 10CFR851 compliant
  • Low-pressure burst disk designed to be ISO 4126-2 compliant
  • CF133 or CF275 metal seal flange connections (CF338 or QF50 for gas recovery ports)
  • The scored membrane prevents fragmentation upon rupture