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 392°F (200°C) 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 chemical injection line integrity testing, system isolation, or instrument protection.

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.