Working principle of overflow, Deluge Valve

15/02/2023

The overflow valve or deluge valve is a type of automatic control valve in the water or foam fire fighting system, operating according to the diaphragm mechanism – “Diaphragm Style” or mechanical latch – “Mechanical Latching” (currently rarely used). . In the normal state water is retained in the valve and is controlled by the exhaust system (trim).

1. Concept of overflow valve

Deluge valve or deluge valve is a type of automatic control valve in water or foam fire suppression systems, operating according to the diaphragm mechanism - ''Diaphragm Style'' or mechanical latch - ''Mechanical Latching'' (currently rarely used). . In the normal state water is retained in the valve and is controlled by the exhaust system (trim).

Working principle of overflow, Deluge Valve

Working principle of overflow, Deluge Valve

- Valves are often used in fixed fire extinguishing systems with dry pipeline systems, when the valve is open, it allows water to flow into the pipeline and out through the open nozzles (deluge system). ) or the closed injector (preaction system) has been activated.

- Deluge valve with the advantage of quick opening provides the ability to distribute a large amount of water in a short period of time, so it is applicable to fire protection for high-risk areas such as: transformer rooms. , storage warehouses, airport warehouses, chemical factories, production conveyors...

2. Structure of overflow valve

Diaphragm type overflow valve has three basic components:

* Valve body

* Diaphragm

* Valve cap

Working principle of overflow, Deluge Valve

Structure of Deluge Valve

So what is the operating principle of overflow, deluge valve?

 

Working principle of overflow, Deluge Valve

Working principle of overflow, Deluge Valve

- The deluge valve works on the pressure in the diaphragm chamber (figure 3) to keep the diaphragm against pressure from the water inlet. In the normal state, the pressure in the diaphragm chamber is created by the amount of water entering the chamber through the pipeline connected to the main control valve of the system.

- When the water pipe into the diaphragm chamber is opened by the fire detection system (injector, detector, emergency button, etc.), the water discharges out of the diaphragm chamber faster than its self-filling process through the unit. trim. This causes the pressure in the diaphragm chamber to drop rapidly, resulting in a decrease in the pressure exerted on the diaphragm. Under pressure from the water inlet, the diaphragm contracts to allow water to enter the piping system.

- To summarize: the principle of operation of overflow, deluge valve helps you to understand more about this type of valve.. The article is for sharing, if you have a better comment, please send it to email: pcccdongnamgmail..com We make this article more perfect.

 

 

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