The OSECO FAS (Forward Acting Scored) Rupture Disk is designed and manufactured for high-performance and demanding rupture disk applications.

The FAS is scored after the forming of its high crown. This process yields a high performance disk to withstand the most difficult applications. The FAS offers a smooth non-scored surface towards the process media. This limits product accumulation on the disk and reduces the risk of polymerization and crytallization of media on the disk surface.

Relief Valve Isolation:
The FAS rupture disk has a 90% operating ration for applications requiring a high operating to set pressure ratio. Due to the high operating ratio and non-fragmenting design, the FAS rupture disk is an excellent choice for isolation of safety relief valves. Installing the leak tight FAS rupture disk between the process media dn the safety relief valve protects the valve and prevents emissions to the atmosphere. Contact Advanced Rupture Disk Technology with your specific application parameters.

OSECO FAS Rupture Disk

• Sizes 1” through 18”
• Standard Materials of construction 316 Stainless Steel, Nickel 200/201, Inconel-600, Monel-400, Hastelloy C-276, and Aluminum
• Manufacturing Ranges: “0”, “5%” & “10%” (Note: All manufacturing ranges are calculated on the minus side of the requested burst pressure.)
• Excellent for gas or liquid service applications
• Non-fragmenting design
• “Fail-safe”...A damaged or incorrectly installed FAS will always burst at less than the rated pressure.
• Elevated temperatures up to 1000^o F
• Rupture tolerance +5% > 40 psig & +2 psigh < 40 psig
• Non-torque sensitive
• Lowest K_R in the industry means less flow restriction
• Excellent for cyclical applications
• Withstands full vacuum without a separate vacuum support
• Operatures to 90% of stamped burst pressure
• PFA Teflon Liners available for atmospheric and/or process sides (specify LFAS, FASL, or LFASL when ordering)
• Sensors that can be used with the FAS are the SVT, the AMS, the AMSX, and the CMS.
• Holders: The FAS is designed for use in OSECO’s FRDI, flat-seat holder and FRDI(P) pre-torqued holder.

Some applications may require a support ring on the atmospheric side of the FAS. This support ring is recommended in sizes 12” and smaller where lower burst pressures may require additional support. See the min/max chart to view min/max burst pressures as well as lower rupture limits where a support ring is recommended. The ring material is 300 series half hard stainless steel. When ordering the FAS rupture disk with the optional support ring, specify type RFAS.

Table 1 - Maximum Temperature Ratings for FAS

Disk Material Degrees (F) 316ss 900 Nickel 750 Inconel 900 Monel 800 Aluminum 250 Teflon Lined 500

Table 2 - Dimensions for FRDI Rupture Disk Holder

SIZE (Inches) ANSI FLANGE RATING OUTSIDE DIAMETER (Inches) OVERALL HEIGHT (Inches) 1 150 2 1/2 1 5/8 1 300/600 2 3/4 1 5/8 1 1/2 150 3 1/4 1 5/8 1 1/2 300/600 3 5/8 1 5/8 2 150 4 1 5/8 2 300/600 4 1/4 1 5/8 3 150 5 1/4 1 5/8 3 300 5 3/4 1 5/8 4 150 6 3/4 1 7/8 4 300 7 1 7/8 6 150 8 5/8 2 1/2 6 300 9 3/4 2 1/2 8 150 10 7/8 2 7/8 8 300 12 2 7/8 10 150 13 1/4 3 1/4 10 300 14 1/8 3 1/4

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