The OSECO CO rupture disk is a composite rupture disk. It consists of a metal slotted top section, a slit-slot cover and a Teflon or metal seal. The metal top section controls the burst pressure and the seal isolates the top section from the process media and also prevents leakage.

The composite construction of the CO gives it its name. It may include options such as a metal seal, Teflon liners, metal support rings and vacuum supports, all of which may be incorporated into the disks’ configuration.

The CO rupture disk is available in both the 30^o angular seat (CO) and the flat seat designs, (F)CO. The patented, optional “tear drop” feature of the CO reduces the possibility of fragmentation. The CO is excellent for liquid, gas or vapor services and it is excellent for static or high cycling applications. For best results, the CO should not be exposed to pressures in excess of 80% of its stamped burst pressure.

OSECO CO Rupture Disk

• Standard Sizes: 11/16”-24”. Consult Advanced Rupture Disk Technology for other available sizes.
• Pressure Ranges are 3 psig to 2000 psig. Special applications may require reduced manufacturing ranges, please consult Advanced Rupture Disk Technology.
• Standard Materials for the CO rupture disk are 316 Stainless Steel, Nickel 200/201, Inconel-600, Monel-400, and Hastelloy C-276. OSECO uses quality PFA Teflon. For additional materials please consult Advanced Rupture Disk Technology.
• If the CO rupture disk is subjected to vacuum conditions, it is necessary to have a vacuum support to complement the rupture disk (specify type COV).
• Excellent for liquid, gas, or vapor service
• Excellent for static or high cycling service
• “Tear drop” feature helps reduce the possibility of fragmentation (see figure 1).
• Available in flat seat or 30^o angular seat designs
• See table 1 for OSECO standard manufacturing design ranges.
• Non-ASME Code rupture disks are rated at the average of the required burst test. This average must fall within the manufacturing range agreed upon between the manufacturer and the end-user or their agent
• ASME Code (UD) disks are rated within the agreed upon manufacturing range. Each burst test required must fall within the applicable code specified tolerance band established by this disk rating.
• Reduced Manufacturing Ranges: may be possible by 1/2%, 1/4%, or 0%. Please consult Advanced Rupture Disk Technology for all reduced manufacturing ranges
• The rupture tolerance is the maximum variation from the stamped burst press. (see table 2).
• The COR is a CO rupture disk with a protective ring attached to the pressure side of the rupture disk. The RCOR is a CO rupture disk with protective rings attached to both the pressure and atmospheric sides of the disk. The rings protect the rupture disk from damage by a foreign substance on the seating surfaces of the rupture disk holder. A protective ring on the process side of the vacuum support is not required, as the vacuum support also protects the seal from damage.
• Minimum and maximum rupture pressures are listed for sizes and materials. Consult Advanced Rupture Disk Technology for sizes and materials not listed. (see min/max chart)
• Sensors that can be used with the CO rupture disk are the SVT, AMS, AMSX, and the CMS.
• Holders that can be used with the CO 30^o angular seat rupture disks are the Union Holders, the RDI insert, and the flanged bolted holders, RDH-1 through RDH-9. Holders that can be used with the (F)CO (flat seated CO) are the FRDI and FRDI(P).

Table 1 - Standard Manufacturing Ranges for CO Rupture Disks

Specified Rupture Pressure PSIG at 72o F Manufacturing Range % 3-8 +40 to -40 9-12 +30 to -30 13-20 +20 to -10 21-45 +16 to -8 46-90 +12 to -6 91-270 +10 to -5 271-Up +6 to -3

Table 2 - Rupture Tolerances for CO Rupture Disks

Marked Rupture Pressure PSIG at 72o F Rupture Tolerance 3-40 + 2 PSIG 41 & Up + 5%

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