Flange-Mount Pressure-Relief Discs
Install these discs within the bolt circle of ANSI Class 150 flanges. They break open at the burst pressure to allow unrestricted flow. All are for one-time use. Discs are made of resin-impregnated graphite for resistance to temperature and pressure fluctuations as well as corrosive liquids and gases. They include two gaskets for installation between flanges.
Vacuum-rated discs have supports to resist rupture caused by vacuum.
Operating ratio is the ratio between the normal operating pressure and the burst pressure. Exceeding the operating ratio decreases the service life of the disc. For example, a disc with a burst pressure of 100 psi and an operating ratio of 80% should not be used in a system with an operating pressure greater than 80 psi.
| Pipe Size  | For Flange ANSI Class | OD | Thickness | Operating Ratio | Temperature Range, °F | Gasket Material | Valve Type | Choose a Burst Pressure, psi | Each | |
Graphite Body—Resin-Impregnated Graphite Disc | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 150 | 2 1/2" | 1 1/8" | 80% | -20° to 300° | Neoprene | Rupture Disc | 00000000 | 0000000 | |
| 1 1/2 | 150 | 3 1/4" | 1 1/8" | 80% | -20° to 300° | Neoprene | Rupture Disc | 00000000 | 000000 | |
| 2 | 150 | 4" | 1 1/8" | 80% | -20° to 300° | Neoprene | Rupture Disc | 00000000 | 000000 | |
| 3 | 150 | 5 1/4" | 1 1/8" | 80% | -20° to 300° | Neoprene | Rupture Disc | 00000000 | 000000 | |
| 4 | 150 | 6 3/4" | 1 1/8" | 80% | -20° to 300° | Neoprene | Rupture Disc | 00000000 | 000000 | |
| 6 | 150 | 8 5/8" | 1 1/8" | 80% | -20° to 300° | Neoprene | Rupture Disc | 00000000 | 000000 | |
| Pipe Size | For Flange ANSI Class | OD | Thickness | Max. Vacuum, in. of Hg | Operating Ratio | Temperature Range, °F | Gasket Material | Valve Type | Choose a Burst Pressure, psi | Each | |
Graphite Body—Resin-Impregnated Graphite Disc | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 150 | 2 1/2" | 1 1/8" | 29.92 | 80% | -20° to 300° | Neoprene | Rupture Disc | 15 | 00000000 | 0000000 |
| 1 1/2 | 150 | 3 1/4" | 1 1/8" | 29.92 | 80% | -20° to 300° | Neoprene | Rupture Disc | 00000000 | 000000 | |
| 2 | 150 | 4" | 1 1/8" | 29.92 | 80% | -20° to 300° | Neoprene | Rupture Disc | 00000000 | 000000 | |
| 3 | 150 | 5 1/4" | 1 1/8" | 29.92 | 80% | -20° to 300° | Neoprene | Rupture Disc | 00000000 | 000000 | |
| 4 | 150 | 6 3/4" | 1 1/8" | 29.92 | 80% | -20° to 300° | Neoprene | Rupture Disc | 00000000 | 000000 | |
| 6 | 150 | 8 5/8" | 1 1/8" | 29.92 | 80% | -20° to 300° | Neoprene | Rupture Disc | 00000000 | 000000 | |