PRE-ACTION VALVES
Preaction Valves
Sprinkler systems where extinguishing is carried out on the principle of a second event in addition to the explosion of the sprinklers, and additional detection systems are used are called pre-reacting sprinklers. The valves used in these systems are also called pre-reactor valves.
They are divided into two parts according to locking systems.
A - Single Interlock Pre-Action Systems
A.1- Wet Pilot Activated
A.2- With Dry Pilot Activation
A.3- Electrical Activation
B - Double Interlock Pre-Action Systems
B.1- Electric - Pneumatic Activated (Sprinkler + Detector)
B.2- Electric - Electric Activated (Detector + Pressure Switch)
They are used where the accidental explosion or damage of the sprinkler or sprinkler pipe can cause serious damage to the site.
Scope of application
- Archives
- Computer Rooms
- Libraries
- Museums
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