Powder/Bulk Solids 2000: A Robust Low-Pressure Rupture Disk?
"We're the only rupture disk manufacturer that has its own 5-axis laser," says Western US/Latin America sales manager Shawn McCorkle. "That lets us provide faster delivery and lower costs."
It also enables Oseco to do the type of R&D that companies without their own laser in the back room would find hard to emulate.
One result of the research is the Oseco PLR precision low pressure reverse buckling pressure disk. According to McCorkle, it works at pressures as low as 2 psi. Unlike other low-pressure rupture disks, though, it is pretty solid. It is armored one the outside with a spot-welded metal hexagon, while Oseco can coat the inside with corrosion-resistant fluoropolymers.
"It it's dropped or banged, it doesn't change it's performance characteristics," says McConkle. He contrasts this with conventional scored low-pressure rupture disks, which are made of very thin metal.
The key Oseco's PLR is its laser-cut "frog legs," which act as a hinge. When pressure exceeds the limit, the dome reverse-buckles and pivots on the hinge as it opens.
The device does not fragment. The disks come in range from 1 in. dia to 8 in. dia. Standard materials include Hastelloy (C-276), 316 stainless steel, nickel, Monel, and Inconel, with special materials available on request. The disks are designed for liquid or gas service, and operate up to 90% of rated burst pressure.
For more information: Shawn McCorkle, Sales Manager, Western US/Latin America, Oklahoma Safety Equipment Co., 1701 West Tacoma, Broken Arrow, OK 74012. Phone: 918-258-5626 or 800-395-3475. Fax: 918-251-7662.
By Alan S. Brown