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Magazine Sprinkler Systems NAVSEA S9522-AA-HBK-010
Terms in this set (20)
Magazine sprinkler systems are designed to completely flood their designated spaces in how long?
Within 1 hour
How are shipboard magazine sprinkler systems controlled?
Hydraulically- controlled saltwater/seawater-operated
How many basic types of sprinkler systems are there?
2-Wet and dry
Describe main control valves
They are globe-type valves, normally closed and designated to open when actuated.
What is the minimum pressure needed to open main control valves?
How can the control valve be actuated?
Automatically or manually
How are magazine sprinkler systems actuated?
Automatic control system in response to both a rapid rise in temperature and the reaching of a preset temperature
What are the elements of the automatic control system?
Heat sensing devices (HSD's), transmission lines, circle seal check valves, and pneumatically released pilot valve (PRP)
Where are the HSD's located?
Mounted on overhead and connected to PRP valve by 1/8" transmission lines.
What is necessary to trip the PRP valve?
Pressure from hot air
When is the fusible link designated to part from the HSD?
When the link temp reaches 160' (degrees) (plus or minus 3 degrees) Fahrenheit
How many vented check valves are installed in each transmission line and how many is the max in each PRP?
1 installed in each transmission line with a max of 12 per PRP
How many transmission tubing connection ports does the PRP manifold contain?
Describe the PRP valve
A normally closed spring-loaded pilot valve that opens automatically to actuate the magazine sprinkler system in response to a pneumatic signal from one or more thermo pneumatic elements.
What are the main components of the PRP valve?
Operating mechanism, compensating vent, and pilot valve.
How much differential pressure is needed to trip the PRP valve?
8 ounces per square inch across the the release diaphragm
What is used to open and close the sprinkler control valves?
The operating pressure circuit is!
What does the operating pressure circuit do?
Connects the manual control valves, hydraulically-operated components of the control system, and the magazine sprinkler valve.
Describe the Manual Control Valve
Rotary disk plate-type valve installed to permit rapid hydraulic operation of the magazine sprinkler valve.
What prevents accidental operation of the sprinkler system?
A locking device in the form of a key.
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