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Additional Products for Motorsports

Additional Components from The Lee Company That Make Motorsports Faster and Safer

The Lee Company offers a wide range of products specialized for the motorsports industry. These include rupture discs and combination valves.

Like all Lee products, these components are made from corrosion-resistant solid alloys, are tested under a rigorous quality management system and designed for high reliability, allowing them withstand the harsh conditions, high temperatures, and extreme pressures of motorsports while still delivering the performance needed to win races.

The Lee Company deals heavily in custom products. All of the components below are adaptable to the needs of your specific application, allowing you to create a product that efficiently functions as it was designed to.

Rupture Discs

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.

PRI/Check Valves

Lee PRI®/Chek® Valves combine the function of a reverse flow pressure relief valve in parallel with the function of a check valve with free flow in the forward direction into one easily installed insert. The relief valve function features a rugged Tungsten Carbide ball and a 440C seat for durability and long life. The remaining components are constructed entirely of stainless steel. The valves are available in a range of relief flow cracking pressures for system pressures up to 5000 psi.

The 281 PRI/Chek Valves are available with or without integral safety screens. The unscreened version has a maximum restriction of 300 Lohms in the free flow direction and is available in nine different standard relief flow cracking pressures up to 3600 psid. The screened version has a maximum restriction of 550 Lohms in the free flow direction and is available in 15 different standard relief flow cracking pressures up to 5900 psid. The 375 PRI/Chek Valve has a maximum restriction of 220 Lohms in the free flow direction and is available in seven different standard relief flow cracking pressures up to 5400 psid.

Lee Components in Unions

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).

Support & Resources

Support & Resources from a Team that Speaks Your Language

Partner with The Lee Company and get much more than just a supplier of top-quality fluid control products. Our reliable technical support team is available every step of the way to help you find solutions, maximize productivity, and drive efficiency across your operations. Check out these resources tailored to the motorsports industry to learn more.