一、結構及用途 Structure and purpose

該閥用于生活供水和消防供水并聯(lián)供水系統(tǒng)中，正常情況供生活用水，當火災發(fā)生時消防用水時，閥門自動關閉生活用水，確保足夠的消防用水。當消防停止用水時壓力減少，閥門自動恢復生活用水，該閥使系統(tǒng)無須另設專門的消防單獨供水管網(wǎng)，大大地節(jié)省了工程建設成本和日常的用水量。該閥控制靈敏、安全可靠、調試簡單、使用壽命長。

Used in the living and fire-fighting merged water supply system It supplies living water at normal condition and．in case of a fire，automatically close the living water and open the fire-fighting one to make it surely enough，and then when fire-fighting water stops and the pressure is reduced，resets the living wa-ter automatically．Thus making the system no need to set an individual fire-fighting water supply pipe network and both engineering construction cost and daily water used quantity greatly saved.It features sensitive control,safety,reliability,simple debugging and long duration

四、主要外形及連接尺寸 Schematic diagram of installation

注：安裝示意圖中彈性座封閘閥或蝶閥任選，建議≥ DN350選蝶閥。

Note：Either elastic seat ring sealed gate valve of butterfly valve can be selected in the schematic diagram of installation.Recommended to select the butterfly valve in case of≥DN350