干式报警阀是指在其出口侧充以压缩气体，当压缩气体低于某一定值时能使水自动流入喷水系统并进行报警的单向阀。

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.

川消报警阀仅应用于干式系统，其平时用来隔开配水管网中的压缩气体和供水管网中的压力水，火灾时在压差作用下自动开启，启动系统。

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.

为使较低的气压将供水管网的水挡在干式报警阀阀瓣的供水侧，干式报警阀大多都设计成差动型。阀瓣将阀门分成两部分，进口侧与一定压力的水源相连，出口侧与配水管网相连，内充一定压力的压缩空气，水源压力和气体压力分别通过直接或间接机构作用于阀瓣上。干式报警阀利用两侧气压作用在阀瓣上的力矩差控制阀瓣的封闭和开启。

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.

干式报警阀的密封组件包括密封座和阀瓣，其中密封座分为气密封座与水密封座，平时与阀瓣压在一起，使阀门处于伺应状态，密封座设有中间室，直接与报警管路连接，平时与大气相通。

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.

气密封座的直径大于水密封座的直径，两个密封座被一个处于大气压的中间室隔离开来。平时供水侧水压和出口侧气压产生的压力直接作用于阀瓣上，但供水侧和出口侧阀瓣受力面积不同，比例一般为1:5，以保证可靠的密封。

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.

干式报警阀进出口公称直径分为50、65、80、100、125、150、200、250mm八种规格。其额定工作压力不应低于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.

平时干式报警阀处于伺应状态下，密封组件在出口侧所受的力不小于进口侧水源施加的力，因此，阀门处于关闭状态。

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.

当出口侧的闭式喷头动作时，使出口侧气压下降，当降到一定程度时，进口侧产生的力大于阀瓣出口侧施加的力后，密封组件打开，进口侧的水流入出口侧配水管道，供给已动作喷头喷水灭火。还有什么事项就来我们网站http://www.cx-fire.com咨询吧！

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.cx-fire.com Consult!