Heat-Activated Threaded Pressure-Relief Discs
Also known as fusible plugs, these discs have a metal core that melts at a set temperature to exhaust discharge directly and allow unrestricted flow. Install these one-time-use discs in pipelines and tanks.
Exceeding the maximum operating temperature decreases service life and may cause the disc to open below its melting temperature. These discs should not be used in a system with an operating pressure greater than 500 psi.
Inlet | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Pipe Size  | Location | Relief Port Location | Max. Pressure, psi | Max. Operating Temperature, °F | Overall Ht. | Disc Material | Valve Type | Each | |
NPT Male Inlet and Relief Vent | |||||||||
Brass Body—165° F Melting Temperature | |||||||||
| 1/4 | Bottom | Top | 500 | 100° | 3/4" | Bismuth, Cadmium, Lead, Tin | Rupture Disc | 0000000 | 000000 |
| 3/8 | Bottom | Top | 500 | 100° | 3/4" | Bismuth, Cadmium, Lead, Tin | Rupture Disc | 0000000 | 00000 |
| 1/2 | Bottom | Top | 500 | 100° | 7/8" | Bismuth, Cadmium, Lead, Tin | Rupture Disc | 0000000 | 00000 |
Brass Body—212° F Melting Temperature | |||||||||
| 1/4 | Bottom | Top | 500 | 150° | 3/4" | Bismuth, Lead, Tin | Rupture Disc | 0000000 | 00000 |
| 3/8 | Bottom | Top | 500 | 150° | 3/4" | Bismuth, Lead, Tin | Rupture Disc | 0000000 | 00000 |
| 1/2 | Bottom | Top | 500 | 150° | 7/8" | Bismuth, Lead, Tin | Rupture Disc | 0000000 | 00000 |