FIRE PROTECTION PREACTION AND DELUGE CONTROL ARRANGEMENTS

摘要

In the embodiments described in the specification, a deluge and preaction control system supplies water to a sprinkler line through a solenoid control val ve which may be actuated by a control panel receiving electrical signals from detec tors or from an emergency switch. A preaction riser assembly is arranged to bypass th e solenoid control valve to supply water to the sprinkler line through a manual va lve and to permit testing of the system. An optional compressor supplying air pressu re of at least 2 psi to the sprinkler line and detects damage to the sprinkler line by loss of pressure.