Fenwal 12-F27121-020-06 Detect-A-Fire 325F Close on Rise

Fenwal 12-F27121-020-06 Detect-A-Fire 325F Close on Rise
Images for general purposes only. Actual may be different than depicted.
Fenwal 12-F27121-020-06 Detect-A-Fire 325F Close on Rise

Fenwal 12-F27121-020-06 Detect-A-Fire 325F Close on Rise

SKU: 12-F27121-020-06
Rating:
Quantity Price Stock
Usually ships 2-3 weeks
Usually ships 2-3 weeks
$401.84     /ea
Usually ships 2-3 weeks
0
$0.00
0
$0.00
0
12-F27121-020-06
Fenwal Detect-a-Fire Detection and Release Device

DETECT-A-FIRE® (D-A-F) detectors are the “heart” of many fire protection systems. These highly reliable devices have been the standard for over 65 years. Thousands of these detectors are in systems controlling the release of extinguishants such as clean agents, CO2, water, or dry chemicals. In some systems the device is used as an alarm device, to sense overheat or fire and alert personnel. D-A-F detectors are widely accepted, because they are designed with rate compensation. This provides a unique advantage over both fixed temperature and rate-of-rise types of detectors because the D-A-F detector accurately senses the surrounding air temperature regardless of the fire growth rate. At the pre-determined danger point, the system is activated. Fixed temperature detectors must be completely heated to alarm temperature and therefore a lag in response time may occur with a fast rate fire. Rate-of-rise devices, on the other hand, are triggered by the rate of increase in ambient temperature and are subject to false alarms caused by harmless, transient thermal gradients such as the rush of warm air from process ovens. The key to the detector’s sensitivity is in the design. The outer shell is made of a rapidly expanding alloy which closely follows changes in surrounding air temperature. The inner struts are made of a slower expanding alloy. Designed to resist thermal energy absorption and sealed inside the shell, the struts follow temperature changes more slowly. A slow rate fire will heat the shell and struts together. At the “set point”, the detector will trigger, actuating the alarm or releasing the extinguishant. A transient rush of warm air up to 40°F/min. may expand the shell, but not enough to trigger the detector. By ignoring transient warm air excursions, the D-A-F detector virtually eliminates false alarms prevalent with rate-of-rise devices. If a fast rate fire starts, the shell will expand rapidly. The struts will close, actuating the alarm and/or releasing the agent. The faster the fire rate of growth, the sooner the D-A-F detector will react.

Features:
  • Repeatable-self-restoring, nothing to replace, testable
  • Rugged- withstands shock and vibration
  • Vesatile- various tempertature sttings available
  • ROHS Compliant
Applications:
  • Protection of schools, factories, offices, libraries, etc.
  • Power generation
  • Gas station islands
  • Paint spray booths
  • Range hoods
  • Engine compartments
Time Index +/- 10 degrees F
Color Coding Red
Temperature 325 degrees F

Q & A: Ask the Questions, share answers

Do you have questions about this product?