干式報警閥是指在其出口側充以壓縮氣體，當壓縮氣體低于某一定值時能使水自動流入噴水系統并進行報警的單向閥。

Dry alarm valve refers to a one-way valve that is filled with compressed gas on its outlet side. When the compressed gas is below a certain value, it can automatically flow water into the water spraying system and give an alarm.

川消報警閥僅應用于干式系統，其平時用來隔開配水管網中的壓縮氣體和供水管網中的壓力水，火災時在壓差作用下自動開啟，啟動系統。

The Chuanxiao alarm valve is only used in dry systems and is usually used to isolate compressed gas in the water distribution network and pressure water in the water supply network. In case of a fire, it automatically opens under the pressure difference to start the system.

為使較低的氣壓將供水管網的水擋在干式報警閥閥瓣的供水側，干式報警閥大多都設計成差動型。閥瓣將閥門分成兩部分，進口側與一定壓力的水源相連，出口側與配水管網相連，內充一定壓力的壓縮空氣，水源壓力和氣體壓力分別通過直接或間接機構作用于閥瓣上。干式報警閥利用兩側氣壓作用在閥瓣上的力矩差控制閥瓣的封閉和開啟。

In order to block the water in the water supply network at a lower air pressure on the water supply side of the dry alarm valve disc, most dry alarm valves are designed as differential types. The valve disc divides the valve into two parts. The inlet side is connected to a certain pressure water source, and the outlet side is connected to the water distribution network. The valve disc is filled with compressed air at a certain pressure, and the water source pressure and gas pressure are respectively applied to the valve disc through direct or indirect mechanisms. The dry alarm valve controls the closure and opening of the valve disc by utilizing the torque difference between the air pressure acting on the valve disc on both sides.

干式報警閥的密封組件包括密封座和閥瓣，其中密封座分為氣密封座與水密封座，平時與閥瓣壓在一起，使閥門處于伺應狀態，密封座設有中間室，直接與報警管路連接，平時與大氣相通。

The sealing components of the dry alarm valve include a sealing seat and a valve disc. The sealing seat is divided into a gas sealing seat and a water sealing seat, which are usually pressed together with the valve disc to keep the valve in a waiting state. The sealing seat has an intermediate chamber, which is directly connected to the alarm pipeline and is usually connected to the atmosphere.

氣密封座的直徑大于水密封座的直徑，兩個密封座被一個處于大氣壓的中間室隔離開來。平時供水側水壓和出口側氣壓產生的壓力直接作用于閥瓣上，但供水側和出口側閥瓣受力面積不同，比例一般為1:5，以保證可靠的密封。

The diameter of the gas seal seat is greater than that of the water seal seat, and the two seal seats are separated by an intermediate chamber at atmospheric pressure. The pressure generated by the water pressure on the water supply side and the air pressure on the outlet side directly acts on the valve disc, but the force area of the valve disc on the water supply side and outlet side is different, with a ratio of 1:5 to ensure reliable sealing.

干式報警閥進出口公稱直徑分為50、65、80、100、125、150、200、250mm八種規格。其額定工作壓力不應低于1.2MPa。

The nominal diameter of the inlet and outlet of the dry alarm valve is divided into eight specifications: 50, 65, 80, 100, 125, 150, 200, and 250mm. Its rated working pressure should not be less than 1.2MPa.

平時干式報警閥處于伺應狀態下，密封組件在出口側所受的力不小于進口側水源施加的力，因此，閥門處于關閉狀態。

Normally, the dry alarm valve is in a waiting state, and the force exerted by the sealing component on the outlet side is not less than the force exerted by the water source on the inlet side. Therefore, the valve is in a closed state.

當出口側的閉式噴頭動作時，使出口側氣壓下降，當降到一定程度時，進口側產生的力大于閥瓣出口側施加的力后，密封組件打開，進口側的水流入出口側配水管道，供給已動作噴頭噴水滅火。還有什么事項就來我們網站http://www.xintli.net咨詢吧！

When the closed nozzle on the outlet side acts, the air pressure on the outlet side decreases. When the pressure drops to a certain extent, the force generated on the inlet side is greater than the force applied on the outlet side of the valve disc. The sealing component opens, and the water flow from the inlet side enters the water distribution pipeline on the outlet side to supply the activated nozzle with water for fire extinguishing. If there are any other matters, please come to our website http://www.xintli.net Consult!