Description
The isolation seal (IS) rupture disc is a flat composite rupture disc that is installed between standard-bore ASME 150# flanges. The recommended operating pressure is 50% of the disc's minimum burst pressure.
IS discs are typically used for:
Low-pressure relief of atmospheric storage tanks.
Isolation of upstream relief valve manifolds.
Corrosion barrier.
Environmental seal.
The IS disc is available in two designs:
IS-1: Bursts in one direction only.
IS-2: Bursts at an identical rating in either the positive or vacuum direction.
The IS disc includes a high-visibility flow direction tag for easy installation, correct orientation and quick inspection. All IS rupture discs in nominal sizes of 1″ (25 mm) and larger include a flow direction tag.
Seat configuration:
Flat seat, no support required.
Burst pressure range:
See Table 7, Minimum/Maximum Burst Pressures for IS Rupture Discs.
Table 2A – Burst Tolerance and Maximum Recommended Operating Pressures.
Available materials:
Top section: 316SS, alloy 600, alloy 400, nickel.
Seal: Fluoropolymer or polyethylene.
Includes a non-asbestos gasket on each side of the disc for easier handling and installation.
Manufacturing range:
See Table 2, Manufacturing Ranges.
Special and reduced manufacturing ranges are available upon request.
Material availability:
Available in a variety of materials to withstand highly corrosive media and atmospheric conditions.
Specified rating types and MIN/MAX are also available.