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Over-pressure protection from miniature burst disc plugs

23 May 2014

Over pressure protection is essential for many critical liquid and gas flow control systems. A new range of burst disc plugs, from Lee Products are said to offer a solution.

The Lee Burst Disc Plug provides high-pressure relief in a leak-tight, corrosive resistant, standard miniature package measuring 135mm x 173mm, with special sizes as small as 64mm x 94mm.

The plugs, which are available with pressure ratings from 3,000 to 15,000 psid, are designed to seal a passageway or volume until the rated burst pressure is exceeded. At this point the plug ruptures, creating a flow passage as large as Ø.64mm (12 Lohms) to relieve the excess pressure, or allow flow to, or from the isolated system.

The plugs are made from NACE compliant materials enabling them to withstand high-temperature and corrosive environments. They also incorporate Lee’s field-proven seal which prevents bypass leakage, eliminates the need for secondary retention and the need for an O-ring or elastomeric seal. They have a tolerance of ±10% of rated burst pressure, operate up to 80% of rated burst pressure and are capable of operating in temperatures up to 232ºC.

Typical applications are  said to include, down hole oil tool system isolation, instrument protection and chemical injection, over pressure protection and back-up in hydraulic/pneumatic systems and protection from corrosive media in process industry applications.

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