當(dāng)閥門從進(jìn)口端給水時(shí)，水流過針閥進(jìn)入主閥控制室，并經(jīng)過導(dǎo)閥、球閥流出主閥控制室到出口，此時(shí)主閥處于全開或浮動(dòng)狀態(tài)。調(diào)定主閥上部的流量調(diào)節(jié)閥，可為主閥設(shè)定一定開度。調(diào)節(jié)針閥開度和調(diào)節(jié)導(dǎo)閥彈簧壓力，即可使主閥開度保持在設(shè)定開度，并在壓力變化時(shí)導(dǎo)閥進(jìn)行自動(dòng)調(diào)節(jié)，保持流量不變。
http://www.shqgfm.com
http://www.sh-qigao.com
http://www.qigaofamen.com
http://www.qigaovalve.com
http://www.qigaov.com
http://www.chinaqigao.com
http://www.shqgfm.net
http://www.qigaov.net
http://www.qgzhafa.com
http://www.qgqiufa.com
http://www.qgqdf.com
http://www.qgdzf.com
http://www.qgdiefa.com
http://www.qgjzf.com
http://www.qgzhf.com
http://www.qgssf.com
http://www.qgglq.com
http://www.qgflf.com
http://www.qggmf.com
http://www.qgslf.com
http://www.qgdcf.com
http://www.qgzhq.com
http://www.qgdwf.com
http://www.qgyqf.com
http://www.zhengyev.com
http://www.shbtbf.com