Alta Robbins replacement rupture disks are available in seven different burst pressures. Each disk is color coded to the corresponding burst pressure and comes with a Teflon Washer (P/N RDTW). General information: For all products that incorporate a rupture disk. The nominal rupture disk burst pressure should be at least 40% higher than the system operating pressure. Rupture disk burst pressures will be reduced by pulsating pressures, elevated temperature, and internal or external corrosion. In corrosive applications, regular inspections and disk replacements are necessary. Use of this rupture disk in vacuum or alternating vacuum / pressure applications may cause premature disk failure. When vented, the rupture unit presents a potential danger caused by noise and escaping pressure, chemicals or fragmented particles. The complete rupture disk assembly consists of the disk, PTFE washer (or optional PTFE liner) and holder. Each holder is etched with the nominal burst pressure and each disk is color coded for identification. To replace the rupture disk use the following instruction: 1) Remove the holder, disk, and washer (or liner) from the valve body. 2) Install a new PTFE washer (or liner) on the process side of the disk. 3) Install a new disk on top of the PTFE washer or PTFE liner. The color code should be visible to the operator. Note: The PTFE washer or liner can only be used one time without replacement. 4) Thread in the holder.
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