The difference between fire extinguishing systems using deluge valve, overflow valve

16/02/2023

The difference between a fire suppression system that uses a deluge valve, an overflow valve and that does not make any difference, let's also find out this issue.

Duties of fire fighting system using deluge valve, overflow valve

Deluge system: is a fixed fire protection and extinguishing system with open nozzles. Water is retained at the deluge valve and is controlled by a discharge system (TRIM). When the trim is in operation, the overflow valve opens and water flows out through all nozzles. The trim of the overflow system is available in 3 types based on the principle of activation: hydraulic, air and electrical pressure.

+ Wet pilot actuation / hydraulic release: uses a system of pipes filled with water directly connected to the diaphragm chamber with sealed nozzles (referred to as equipment) fire detection) installed with open nozzles in the protected area. When the trim is active (closed nozzle activated) water flows out, reducing the pressure in the diaphragm chamber leading to the deluge valve opening.

>>>Nguyên lý hoạt động của van xả tràn, deluge valve>>>>

Sự khác nhau giữa các hệ thống chữa cháy sử dụng deluge valve, van xả tràn

Sơ đồ hệ thống van xả tràn kích hoạt ướt

+ Air-pressure-based exhaust trim (dry pilot actuator / pneumatic release): uses a system of dry pipes connected to the diaphragm chamber through a set of valves that activate based on air pressure (dry pilot actuation). with closed nozzles (referred to as fire detectors) installed with open nozzles in the protected area. When the trim is active (the sealed nozzle is activated), the air pressure in the pipeline is reduced, which activates the ''Air Actuator'' valve, allowing the water in the diaphragm chamber to flow out resulting in a pressure drop and the deluge valve opening. .

Sự khác nhau giữa các hệ thống chữa cháy sử dụng deluge valve, van xả tràn

Sơ đồ hệ thống van xả tràn kích hoạt khô

+ Exhaust trim set based on electrical system (electric actuation): using a fire alarm system including control cabinet with fire detectors and solenoid valve (using tyco solenoid valve for Tyco's valve system) ) to control the diaphragm chamber. When a fire occurs, the cabinet activates the solenoid valve, causing the water in the diaphragm chamber to flow out leading to a decrease in pressure and opening the deluge valve.

Sự khác nhau giữa các hệ thống chữa cháy sử dụng deluge valve, van xả tràn

Sơ đồ hệ thống van xả tràn kích hoạt điện

Preaction system: is a fixed fire protection and extinguishing system with sealed nozzles. Water is retained at the overflow valve (for this system this can be called a tyco preaction valve) and is controlled by a trim. When the drain trim is active, the deluge valve opens and water flows out through all nozzles.

“Pre-action” here means that the fire detection or discharge control system must operate before the sealed nozzles activate. Allows water from the feed to arrive at the nozzle when the system is in operation.

Fire fighting system using deluge valve, how is overflow valve classified?

The preaction system uses the same exhaust trim as in the deluge system and is categorized into:

+ Single-acting, electrically-activated system (Electric-Single Interlock Preaction): One-acting means only one action is needed to open the overflow valve and only the exhaust trim (here is the fire alarm system and solenoid valve) is allowed to open the overflow valve. The air pressure in the fire line will be monitored to ensure that the sealed nozzle does not open before the trim, in the case of the closed nozzle operating before the trim will only have a low pressure error reported without a command. open valve.

Sự khác nhau giữa các hệ thống chữa cháy sử dụng deluge valve, van xả tràn

Sơ đồ hệ thống một tác động, kích hoạt điện

+ System of two effects activated by electricity - gas (Electric/Pneumatic-Double Interlock Preaction): two actions are required: a fire alarm system with a solenoid valve and air pressure from the closed nozzle pipeline to activate the valve set. gas occurs before the overflow valve opens. Either of the two effects occurring first, there will only be an error message.

Sự khác nhau giữa các hệ thống chữa cháy sử dụng deluge valve, van xả tràn

Sơ đồ hệ thống hai tác động, kích hoạt điện

Conclusion: The difference between the fire fighting systems using deluge valve, overflow valve that we shared above will help you have a better understanding of these systems.

Có bao nhiêu loại van deluge hiện nay?

 

 

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