Additional Products

The Burst-Sert^™ rupture disc is a single-use isolation device designed to seal a passageway or volume until the rated burst pressure is exceeded. Until that point, it provides a reliable, leak-tight seal in a compact, corrosion-resistant package. Once the burst disc ruptures, a flow passage as large as 0.25 of an inch (12 Lohms*) is created to relieve excess pressure or allow flow to and from the isolated system. Burst pressures are available from 3000 to 15,000 psid with a 10% tolerance. Operating temperatures up to 450°F are available.

Manufactured from Incoloy^® 825 and Inconel^® 625, the Burst-Sert incorporates The Lee Company’s field-proven controlled expansion principle, which ensures retention and prevents any bypass leakage without the use of threads or elastomeric seals. These are perfect for system isolation or instrument protection for both hydraulic and pneumatic systems.

Virtually every 0.187, 0.250, and 0.281 inch diameter Lee insert is offered already installed in appropriately sized flared, flareless, or dynamic beam seal unions. These unions are made of 304 stainless steel (code “J” in military standards) or 6AL-4V Titanium (code “T”). All Lee Unions have a unique hex wrench arrangement to distinguish them from simple unions and permanent external marking to identify the insert.

The configuration of these unions has been carefully chosen to accommodate most of the 0.187, 0.250, and 0.281 inch Lee inserts, and yet maintain both minimum envelope and weight. These units incorporate the high-root radius UNJF threads to minimize stress concentrations with Class 3A tolerances. All fitting-end dimensions are, except for the internal diameters, in general accordance with the appropriate AS4375E4 and E6, AS4395E04 and E06, and AS85720/1-04 and –06 specifications.

Every Lee Union with an insert installed is proof pressure tested; flared and flareless to 6000 psid and dynamic beam seal to 16,000 psid. Maximum working differential pressure is a function of the particular Lee insert specified (refer to the appropriate insert section).