Fire Detection Devices for Control Systems
 High and low pressure fusible plugs are designed to act as fire sensors in a complete safety system. These plugs are available in two types.
Bleed – contains a fusible alloy that will melt at fire temperatures and bleed control pressure downstream.
| Sizes |
1/4”, 3/8”, 1/2” and 1” MNPT
|
| Low pressure |
300 PSI (20.7 BAR)
|
| High pressure |
10,000 PSI (689.5 BAR) |
| Melting points |
158°, 184°, 203°, 255° and 281°F (70°, 84°, 95°, 124° and 138°C)
|
Block & Bleed
Contains a fusible alloy that will melt at fire temperatures and bleed control pressure downstream, while at the same time blocking upstream pressure.
| Size |
1/4" FNPT |
| Low pressure |
250 PSI (17.2 BAR) |
| High pressure |
10,000 PSI (689.5 BAR)
|
| Melting points |
158°, 184°, 203°, 255° and 281°F (70°, 84°, 95°, 124° and 138°C)
|
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