ZZYP型自力式壓力調(diào)節(jié)閥的特點 　　在無電、無氣的場所工作，同時又節(jié)約了能源，壓力設(shè)定值在運行中可隨意調(diào)整。自力式壓力調(diào)節(jié)閥采用快開流量特征，動作靈敏、密封性能好，因而它廣泛應(yīng)用于石油、化工、電力、冶金、食品、輕紡、機(jī)械制造與居民建筑樓群等各種工業(yè)設(shè)備中各種氣體、液體及蒸汽介質(zhì)減壓、穩(wěn)壓〔用于閥后調(diào)節(jié)〕，或泄壓、持壓〔用于閥前調(diào)節(jié)〕的自動控制。 　　 附設(shè)冷凝器可在≤350℃溫度下使用。 　　 使用溫度∶–20℃～350℃，壓力∶1.6～6.4MPa。   自力式壓力調(diào)節(jié)閥主要技術(shù)參數(shù)和性能指標(biāo) 類別 型號 類別 型號 單座壓閉型 ZZYP-16-64B 單座壓開型 ZZYP-16-64K 雙座壓閉型 ZZYN-16-64B 雙座壓開型 ZZYN-16-64K 套筒壓閉型 ZZYM-16-64B 套筒壓開型 ZZYM-16-64K 壓閉型：用于閥后壓力調(diào)節(jié)，當(dāng)閥后壓力升高，閥門關(guān)閉，以達(dá)到減壓、穩(wěn)壓的目的。 壓開型：用于閥后壓力調(diào)節(jié)，當(dāng)閥后壓力升高，閥門打開，以達(dá)到泄壓、穩(wěn)壓的目的。 自力式壓力調(diào)節(jié)閥工作原理 1、調(diào)節(jié)閥前自力式壓力調(diào)節(jié)閥的工作原理 　　 自力式壓力調(diào)節(jié)閥其初始閥芯的位置在關(guān)閉狀態(tài)。當(dāng)閥前壓力P1通過閥芯、閥座的節(jié)流后變?yōu)殚y后壓力P2，同時P1通過管線輸入上膜室作用在膜片上，其作用力與彈簧的反作用力相平衡時的閥芯位置決定了閥的開度，從而控制閥前壓力。當(dāng)閥前壓力P1增加時，P1作用在膜片上的作用也隨時之增加。此時，膜片上的作用力大于設(shè)定彈簧的反作用力，使閥芯向離開閥座方向移動，導(dǎo)致閥的開度變大，流阻變小，P1向閥后泄壓，直到膜片上的作用力與彈簧反作用力相平衡為止，從而使P1降為設(shè)定值。同理，當(dāng)閥前壓力P1降低時，動作方向與上述相反，這就是閥前壓力調(diào)節(jié)的工作原理。 　　 2、調(diào)節(jié)閥后自力式壓力調(diào)節(jié)閥的工作原理 　　 自力式壓力調(diào)節(jié)閥其初始閥芯的位置在開啟狀態(tài)。當(dāng)閥前壓力P1通過閥芯、閥座的節(jié)流后變?yōu)殚y后壓力P2，P2并經(jīng)過導(dǎo)壓管輸入上膜室作用在膜片上，其作用力與彈簧的反作用力相平衡時的閥芯位置決定了閥的開度，從而控制閥后壓力。當(dāng)閥后壓力P2增加時，P2作用在膜片上的作用力也隨時之增加。此時，膜片上的作用力大于設(shè)定彈簧的反作用力，使閥芯關(guān)向閥座的位置，導(dǎo)致閥的開度減小，流阻變大，P2降低，直到膜片上的作用力與彈簧反作用力相平衡式為止，從而使P2降為設(shè)定值。同理，當(dāng)閥后壓力P2降低時，動作方向與上述相反，這就是閥后壓力調(diào)節(jié)的工作原理。

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