The selection of the 70 -degree fire prevention valve is as follows:
1. Pay attention to the function of the valve. If it is often opened, it is often closed, automatically closed, automatic turnover, manual turnover, manual reset, signal output, and long -distance control.
2.70 degrees fireproof valve is suitable for the pipelines of ventilation, air conditioning or smoke exhaust systems.
3. The selected 70 -degree fire prevention valve should pay attention to the function of the valve.
4.70 degrees fire prevention valve is suitable for ventilation and air -conditioning system.
In general, the 70 -degree fire prevention valve is mainly used on the pipelines of ventilation, air conditioning or smoke exhaust systems, and play a role in fire prevention. When selection, the function, use, structure and accessories of the valve need to be considered.
The role of the 70 -degree fire prevention valve is mainly closed during the fire to prevent the fire from spread through the air duct.The following is a specific description of its role:
1. Block the heat flow and flame: When the fire occurs, the flame invades the air duct, the high temperature causes the melting alloy to melt the valve, or the memory alloys will cause the valve to automatically close it.EssenceIn the process, the valve was closed, blocking the passing of heat or flames to prevent the spread of the fire.
2. Control the fire area: If the fire has spread to the fire channel, continuing to transport air will promote the spread of the fire in the channel, so set the 70 -degree fire prevention valve.When the temperature is higher than 70 degrees, the channel will be closed to prevent the air from entering and slowing the speed of the fire.
Output signal: A temperature control system that is generally easy to fuse alloy is installed on the fire prevention valve. When the fire occurs, the high temperature causes melting alloys on the valve to fuse or the memory alloy generates a variable.Liech sending (supplement) wind machines shut down.