Check valve

止回閥這種類型閥門的作用是只允許介質(zhì)向一個(gè)方向流動，而且阻止反方向流動。通常這種閥門是自動工作的，在一個(gè)方向流動的流體壓力作用下，閥瓣打開；流體反方向流動時(shí)，由流體壓力和閥瓣的自重合閥瓣作用于閥座，從而切斷流動。

Check valve the function of this type of valve is to only allow the medium to flow in one direction and prevent the flow in the opposite direction. Normally, this valve works automatically. Under the pressure of fluid flowing in one direction, the valve flap opens; When the fluid flows in the opposite direction, the fluid pressure and the self weight of the valve disc act on the valve seat to cut off the flow.

信號蝶閥

Signal butterfly valve

信號蝶閥就是普通蝶閥加了一組信號線并和監(jiān)視模塊一起連接到消防報(bào)警主機(jī)，信號（輸入模塊）模塊指示燈常亮是閥門關(guān)閉，模塊信號指示燈閃亮是閥門正常打開。消防中的信號蝶閥就是消防管網(wǎng)中的開關(guān)，因?yàn)橄拦芫W(wǎng)的水必須保持暢通，這樣才能保證滅火的及時(shí)性，所以信號蝶閥一旦關(guān)閉，信號模塊就會報(bào)反饋信息給主機(jī)，通知監(jiān)控消防管網(wǎng)處于關(guān)閉狀態(tài)。而普通蝶閥的開閉不能通過報(bào)警主機(jī)得知，只能現(xiàn)場查看。

The signal butterfly valve is an ordinary butterfly valve with a set of signal lines and is connected to the fire alarm host together with the monitoring module. If the indicator light of the signal (input module) module is always on, the valve is closed, and if the indicator light of the module is flashing, the valve is normally opened. The signal butterfly valve in fire fighting is the switch in the fire fighting pipe network. The water in the fire fighting pipe network must be kept unblocked so as to ensure the timeliness of fire fighting. Therefore, once the signal butterfly valve is closed, the signal module will report the feedback information to the host to inform the monitoring center that the fire fighting pipe network is closed. The opening and closing of ordinary butterfly valves can not be known through the alarm host, but can only be checked on site.

安全閥

Safety valve

安全閥在系統(tǒng)中起安全保護(hù)作用。當(dāng)系統(tǒng)壓力超過規(guī)定值時(shí)，安全閥打開，將系統(tǒng)中的一部分氣體/流體排入大氣/管道外，使系統(tǒng)壓力不超過允許值，從而保證系統(tǒng)不因壓力過高而發(fā)生事故。安全閥屬于自動閥，平時(shí)不需要人去開啟或者關(guān)閉，當(dāng)管道內(nèi)氣體（液體）壓力超過規(guī)定值時(shí)，壓力會自動頂開安全閥上的彈簧裝置，將超壓部分的氣體（液體）排出。

The safety valve plays a safety protection role in the system. When the system pressure exceeds the specified value, the safety valve is opened to discharge part of the gas / fluid in the system into the atmosphere / pipeline, so that the system pressure does not exceed the allowable value, so as to ensure that the system will not have accidents due to the high pressure. The safety valve is an automatic valve. Normally, no person is required to open or close it. When the pressure of gas (liquid) in the pipeline exceeds the specified value, the pressure will automatically open the spring device on the safety valve to discharge the gas (liquid) in the overpressure part.

低泄高封閥

Low relief high seal valve

低泄高封閥的作用是為了防止系統(tǒng)由于驅(qū)動氣體泄漏的累積而引起系統(tǒng)的誤動作而在管路中設(shè)置的閥門。它安裝在系統(tǒng)啟動管路上，正常情況下處于開啟狀態(tài)，只有在進(jìn)口壓力達(dá)到設(shè)定壓力時(shí)才關(guān)閉，其主要作用是排除由于氣源泄漏積低泄高封閥聚在啟動管路內(nèi)的氣體。輕微泄漏的氣體壓力不足以頂動彈簧，氣體順著彈簧兩邊的出氣孔排出，一旦氣體壓力超過低泄高封閥設(shè)定的數(shù)值，氣壓頂動彈簧封住出氣孔，保證驅(qū)動氣體的壓力能打開啟動氣瓶。

The function of the low leakage high sealing valve is to prevent the system from misoperation due to the accumulation of drive gas leakage. It is installed on the start-up pipeline of the system and is normally open. It is closed only when the inlet pressure reaches the set pressure. Its main function is to remove the gas accumulated in the start-up pipeline due to the leakage of the gas source. The slightly leaked gas pressure is not enough to push the spring, and the gas will be discharged along the air outlets on both sides of the spring. Once the gas pressure exceeds the value set by the low pressure relief high pressure sealing valve, the air pressure pushing spring will seal the air outlet to ensure that the pressure of the driving gas can open the starting gas cylinder.
 

浮球閥

Float valve

大圓球?yàn)榭招?，密度遠(yuǎn)低于水，浮漂始終都要漂在水上，當(dāng)水面上漲時(shí)，浮漂也跟著上升。浮漂上升就帶動連桿也上升。連桿與另一端的閥門相連，當(dāng)上升到一定位置時(shí)，連桿支起橡膠活塞墊，封閉水源。當(dāng)水位下降時(shí)，浮漂也下降，連桿又帶動活塞墊開啟。常用于消防水池和屋頂水箱的補(bǔ)水，到了規(guī)定的液位值，自動停止補(bǔ)水。

The large round ball is hollow and its density is far lower than that of water. The float always floats on the water. When the water surface rises, the float also rises. When the float rises, the connecting rod also rises. The connecting rod is connected to the valve at the other end. When it rises to a certain position, the connecting rod supports the rubber piston pad to close the water source. When the water level drops, the float also drops, and the connecting rod drives the piston pad to open. It is commonly used for water replenishment of fire pool and roof water tank. When the specified liquid level is reached, the water replenishment will be automatically stopped.

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