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UHV Burst Disk Low Pressure

  • UHV Compatible all metal construction
  • ISO 4126-2 Compliant
  • Pressure relief range 5 to 7 PSIG
  • Leak tight to 2 x10-10 std. cc/sec of Helium
  • 316 Stainless steel body and disk membrane
  • Bakeable to 450ºC
  • Compact design with no moving parts
  • Optional Gas Recovery Port on ATM Side
  • Calculated Flow rates
    -107 SCFM on 1.33 Flg.Assy.
    -435 SCFM on 2.75 Flg.Assy.
  • For Instructional Manual click here


MDC is pleased to introduce the new Low Pressure (LP) BDA-series burst disks for pressure relief below atmospheric pressure. Designed for use in UHV applications, the LP burst disks feature all metal stainless steel construction. Suitable for overpressure protection of systems with optional gas recovery.

Most vacuum vessels are designed and constructed with internal vacuum joints and welds that are rated for an external load of one atmosphere. They are not pressure vessels and as such should not be subjected to positive pressure loads. MDC has developed a new Low Pressure BDA Burst Disk Series which have an ultra-low rupture pressure. MDC LP BDA-Series burst disks are offered with either 1.33 or 2.75 Del-Seal™ (CF style) metal seal flange connections. They can be fitted to any vacuum system where over pressurization is a concern. A gas recovery option with either 3.38" Del-Seal ™ or ISO NW50 flange is available on the exhaust side of the disk

Low pressure burst disks have been engineered to be ISO 4126-2 compliant. They are constructed with a frustum designed metal membrane which is capable of sustaining a vacuum load. As pressure inside a vacuum vessel reaches 7 PSIG the disk membrane activates and fully opens, relieving the pressure in the system. The disk membrane is circular scored preventing fragmenting upon rupture and thus does not pose harm to local personnel or equipment. Once activated, the disk is not reusable and must be replaced to restore the vessel to an operational condition.

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