The O4A is a one-time-use screwed and bonded plug designed for safety-critical applications such as industrial gas handling or cryogenic applications. It combines a brass body with either a stainless steel or nickel disc, depending on burst pressure and process requirements. The rupture disc is torqued and clamped between the inlet and outlet, offering a cost-effective and maintenance-free solution. It uses an approved thread-locking fluid to prevent tampering and is available with an innovative burst detection system called OE-Tel, which is ATEX-approved and fail-safe. The O4A is available in various disc sizes (15, 19, 25, 40 mm), thread sizes (1/8, 1/4, 3/8, 1/2, 3/4, 1), and thread types (NPT, BSPT, BSPP). It has a burst pressure range of 1-70 barg and an operating ratio of 90% for reverse-acting discs and 85% for forward-acting discs. The product is designed to meet ISO 4126-2:2019 and PED 2014/68/EU standards.
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