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UHV Burst Disk

Features
  • UHV Compatible all metal construction
  • Pressure relief range 9 to 11 PSIG
  • ASME UD Certified
  • Optional Gas Recovery Port on ATM Side
  • Leak tight to 2x10-10 std.cc/sec of Helium
  • 316 Stainless steel body and disk membrane
  • Bakeable to 450 °C
  • Compact design with no moving parts
  • Calculated Flow rates
    -107 SCFM on 1.33 Flg.Assy.
    -435 SCFM on 2.75 Flg.Assy.
  • For Instructional Manual click here


Description

Introduction
MDC's ASME BDA-series Burst Disks are UD certified for pressure relief above atmospheric pressure. They feature an all-metal stainless steel construction and are designed for use in UHV applications. These disks are perfect for protecting your system from over pressurization of your vacuum vessel when pressures start to creep up past atmospheric pressure.

Application
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 in excess of 1-ATM. For this purpose MDC developed BDA disks that are ASME UD certified to prevent the accidental pressurizing of a vacuum vessel. MDC 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.

Design
MDC's ASME BDA-series burst disks have been engineered to be 10CFR851 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 11.5 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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