Engineering characteristics of automatic fire-fighting exhaust valve: First of all, the automatic exhaust valve is characterized by only exhausting and not draining. The design of steam-water separator adopts special structure to ensure that no water will be discharged when exhausting. As long as there is pressure in the system, the exhaust valve will exhaust continuously. Convenient maintenance. Automatic exhaust is equipped with a block valve, which can be easily removed from the system for maintenance, and the water in the system will not flow out, so it is not necessary to empty the system.