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KIDDE-FENWAL火焰探測器27121-20-450產(chǎn)品介紹

說明

DETECT-A-FIRE®（D-A-F）探測器是許多消防系統(tǒng)的“核心”部件。高度可靠的 D-A-F 已作為行業(yè)標(biāo)準(zhǔn)使用了 75 年以上。D-A-F 用于指示過熱或起火狀態(tài)。在絕大多數(shù)應(yīng)用中，D-A-F 提供初始的熱感測，用來啟動(dòng)潔凈氣體、CO?、惰性氣體、干/濕化學(xué)藥劑或水等滅火系統(tǒng)。  

D-A-F 探測器因采用“速率補(bǔ)償”設(shè)計(jì)而被廣泛認(rèn)可。與傳統(tǒng)定溫型和差定溫（升溫速率）型探測器相比，D-A-F 的獨(dú)特優(yōu)勢在于：無論火勢增長速度如何，它都能準(zhǔn)確感知周圍空氣溫度，并在預(yù)設(shè)整定點(diǎn)啟動(dòng)系統(tǒng)。  

定溫探測器必須整體被加熱到報(bào)警溫度，在火勢快速發(fā)展時(shí)可能出現(xiàn)響應(yīng)滯后。差定溫裝置則是由環(huán)境溫度上升速率觸發(fā)，容易受到來自工藝烘爐等無害瞬時(shí)熱氣流的影響而產(chǎn)生誤報(bào)。  

D-A-F 探測器靈敏度的關(guān)鍵在于其結(jié)構(gòu)設(shè)計(jì)（見圖 1）。外殼采用快速膨脹合金制成，可快速跟隨周圍空氣溫度變化。內(nèi)部支柱采用膨脹速度較慢的合金制成，被設(shè)計(jì)為抵抗熱能吸收，并密封在外殼內(nèi)部，因而對(duì)溫度變化的響應(yīng)較慢。  

在慢速升溫火災(zāi)中（圖 2），外殼和支柱會(huì)一起被加熱，到達(dá)整定溫度時(shí)，探測器動(dòng)作，觸發(fā)報(bào)警或釋放滅火劑。  

瞬時(shí)熱空氣流（升溫速率可達(dá) 40°F/分鐘）可能會(huì)使外殼膨脹，但不會(huì)觸發(fā)探測器。通過忽略短暫的熱空氣擾動(dòng)，D-A-F 探測器幾乎消除了差定溫裝置常見的誤報(bào)警。  

如果發(fā)生快速升溫火災(zāi)（圖 3），外殼會(huì)迅速膨脹，內(nèi)部支柱將閉合，觸發(fā)報(bào)警和/或釋放滅火劑?；饎菰鲩L越快，D-A-F 探測器響應(yīng)越早。  

特性

• 可重復(fù)使用——自復(fù)位，無需更換，可測試

• 通用性強(qiáng)——可提供多種溫度整定點(diǎn)

• 結(jié)構(gòu)堅(jiān)固——不銹鋼外殼，壽命長

• 經(jīng)濟(jì)——允許較大安裝間距，降低安裝成本

• 出廠預(yù)設(shè)整定溫度

• 內(nèi)部觸點(diǎn)區(qū)域在不銹鋼外殼內(nèi)實(shí)現(xiàn)氣密封裝

• 符合 RoHS 要求  

應(yīng)用

• 學(xué)校、工廠、辦公樓、圖書館及其他非住宅建筑的防護(hù)

• 發(fā)電設(shè)施

• 加油站島位區(qū)域

• 噴漆房

• 廚房排煙罩/灶臺(tái)罩

• 發(fā)動(dòng)機(jī)艙/發(fā)動(dòng)機(jī)艙室

DESCRIPTION

DETECT-A-FIRE® (D-A-F) detectors are the "heart" of many fire protection systems. The highly reliable D-A-F has been the standard for over 75 years. The D-A-F is used for signaling overheat or fire conditions. In the vast majority of applications, the D-A-F provides the initial heat sensing that is used to activate suppression systems using clean agent, CO2, inert gases, wet or dry chemicals or water.

D-A-F detectors are widely accepted, because they are designed with rate compensation. This provides a unique advantage over both fixed temperature and rate-of-rise types of detectors because the D-A-F detector accurately senses the surrounding air temperature regardless of the fire growth rate. At the pre-determined set point, the system is activated.

Fixed temperature detectors must be completely heated to alarm temperature and therefore a lag in response time may occur with a fast rate fire. Rate-of-rise devices, on the other hand, are triggered by the rate of increase in ambient temperature and are subject to false alarms caused by harmless, transient thermal gradients such as the rush of warm air from process ovens.

The key to the detector's sensitivity is in the design (Figure 1). The outer shell is made of a rapidly expanding alloy which closely follows changes in surrounding air temperature. The inner struts are made of a slower expanding alloy. Designed to resist thermal energy absorption and sealed inside the shell, the struts follow temperature changes more slowly.

A slow rate fire (Figure 2) will heat the shell and struts together. At the "set point", the detector will trigger, actuating the alarm or releasing the extinguishant.

A transient rush of warm air up to 40°F/min. may expand the shell, while not triggering the detector. By ignoring transient warm air excursions, the D-A-F detector virtually eliminates false alarms prevalent with rate-of-rise devices.

If a fast rate fire (Figure 3) starts, the shell will expand rapidly. The struts will close, actuating the alarm and/or releasing the agent. The faster the fire rate of growth, the sooner the D-A-F detector will react.

FEATURES

• Repeatable - self-restoring, nothing to replace, testable

• Versatile - various temperature settings available

• Durable - long lasting stainless steel shell

• Economical - wide spacings reduce installation costs

• Factory set

• Internal contact area hermetically sealed in stainless steel shell

• ROHS Compliant

APPLICATIONS

• Protection of schools, factories, offices, libraries,

or other non-residential buildings

• Power generation

• Gas station islands

• Paint spray booths

• Range hoods

• Engine compartments

KIDDE-FENWAL火焰探測器其他常用型號(hào)：

KIDDE-FENWAL 27121-0-140

KIDDE-FENWAL 27121-0-160

KIDDE-FENWAL 27121-0-190

KIDDE-FENWAL 27121-0-210

KIDDE-FENWAL 27121-20-450

KIDDE-FENWAL 27121-0-275

KIDDE-FENWAL 27121-0-325

KIDDE-FENWAL 27121-0-360

KIDDE-FENWAL 27121-0-450

KIDDE-FENWAL 27121-0-500

KIDDE-FENWAL 27121-0-600

KIDDE-FENWAL 27121-0-725

KIDDE-FENWAL FIRE / OVERHEAT DETECTOR NEW + ORIGINAL+ ONE YEAR WARRANTY

愛澤工業(yè)成立于2010年，定位于向制造工業(yè)提供制造技術(shù)和設(shè)備。代理經(jīng)營世界優(yōu)質(zhì)的電氣自動(dòng)化、機(jī)械與傳動(dòng)、流體控制、儀器儀表、工具等產(chǎn)品。作為電氣，液壓以及氣動(dòng)解決方案的合作伙伴，我們利用我們的全球協(xié)作團(tuán)隊(duì)，為客戶提供先進(jìn)解決方案，市場知識(shí)以及相關(guān)增值服務(wù)來幫助優(yōu)化客戶的工作效率，提高可靠性和安全性，致力于成為工業(yè)產(chǎn)品和解決方案的優(yōu)質(zhì)渠道。

如果有任何關(guān)于KIDDE-FENWAL火焰探測器27121-20-450的疑問，請(qǐng)隨時(shí)與我們溝通。我們將盡全力解決您的問題。

If you have any question for KIDDE-FENWAL products, Please feel free to communicate with us and we will do our best to solve your problem.

KIDDE-FENWAL火焰探測器27121-20-450技術(shù)參數(shù)及介紹