Dry Pipe Alarm Valve
The dry alarm valve is the core control valve of the dry pipe sprinkler system, installed at the water supply end of the system pipeline network. Its characteristic is that the pipeline is usually filled with compressed air or nitrogen gas. In the event of a fire, the nozzle ruptures, causing a decrease in air pressure. After the valve is opened, water enters the pipeline to spray and extinguish the fire, while triggering the alarm device
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Products Description
Dry Pipe Alarm Valve is the core control component of the Dry Pipe Sprinkler System, mainly used in environments prone to freezing such as cold storage, parking lots, and unheated warehouses. Its characteristic is that the pipeline is usually filled with compressed air or nitrogen gas. In case of a fire, the valve opens and water enters the pipeline to spray and extinguish the fire after the air is released, while triggering an alarm.
Working principle
normal behavior:
The water pressure above the valve disc is balanced with the air pressure below, the valve is closed, and the pipeline is filled with compressed air.
During a fire:
The nozzle ruptures due to heat → the pipeline pressure drops → the valve disc loses balance and opens → water flows into the pipeline for spraying.
At the same time, the pressure drop triggers the pressure switch, which activates the alarm bell or fire pump.
Reset:
The valve needs to be manually closed and refilled.
Main components
Valve body: Made of cast iron or stainless steel, resistant to high pressure.
Differential mechanism: Ensure air/water pressure balance.
Alarm port: Connect hydraulic alarm bell or pressure switch.
Accelerator: Quickly expel air and shorten system response time.
Applicable scenarios
Low temperature environment: places where the temperature may be below 4 ° C (such as cold storage, outdoor parking lots).
Special risk area: Dust explosion hazard zone (due to the lack of water in the pipeline, the risk of leakage is reduced)
produces details
company information
Q&A
Q: What are the maintenance points for dry alarm valves?
A: Regular inspection is required:
Air pressure: Ensure the air pressure inside the pipeline.
Valve sealing: prevent valve disc leakage or blockage.
Accelerator: Clean the exhaust vent to avoid blockage.
Drainage test: At least once a year, check the drainage performance of the system
Contact information
Pauline
WhatsApp/WeChat: +86-13332933886
Email: manager@sanjingfire.com
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