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力士樂REXROTH溢流閥DBW10B1-52/315-6EG24N9K4

主營產(chǎn)品：

液壓元件：柱塞泵、葉片泵、齒輪泵、馬達(dá)、截止閥、方向閥、減壓閥、溢流閥、手動閥、流量控制閥、比例閥、伺服閥、插裝閥、電液換向閥、電磁閥、換向閥、電磁球閥、蓄能器、放大版、壓力繼電器、壓力傳感器。

氣動元件：氣動閥、閥島、閥組、電磁閥、手動閥、換向閥、壓力調(diào)節(jié)閥、流量控制閥，止回閥、氣缸和驅(qū)動裝置、壓縮空氣氣源處理單元、真空技術(shù)、傳感器、氣動連接技術(shù)，電氣連接技術(shù)。

電控伺服：伺服驅(qū)動器，伺服電機(jī)、PLC模塊、I/O模塊、框架模塊、電源模塊、數(shù)據(jù)接口模塊、鍵相位模塊、繼電器模塊、檢測時速模塊、溫度模塊、顯示屏、傳感器、探頭、前置器、延伸電纜。

安全閥又稱溢流閥。安全閥顧名思義是保證壓力管道、壓力容器的關(guān)鍵安全應(yīng)用保障，為了保證安全閥的正常工作及延長安全閥的使用壽命，在使用中應(yīng)做到定期檢查運行中的安全閥是否泄漏，卡阻及彈簧銹蝕等不正常現(xiàn)象，并注意觀察調(diào)節(jié)螺套及調(diào)節(jié)圈緊定螺釘?shù)逆i緊螺母是否有松動，若發(fā)現(xiàn)問題及時采取適當(dāng)?shù)木S護(hù)措施。還應(yīng)定期將安全閥拆下進(jìn)行一體清洗、檢查并重新研磨、整定后方可重新使用。

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安全溢流閥有彈簧式和桿式兩大類。另外還有沖量式安全閥、先導(dǎo)式安全閥、安全切換閥、安全解壓閥、靜重式安全閥等。彈簧式安全閥主要依靠彈簧的作用力而工作，彈簧式安全閥中又有封閉和不封閉的，一般易燃、易爆或有毒的介質(zhì)應(yīng)選用封閉式，蒸汽或惰性氣體等可以選用不封閉式，在彈簧式安全閥中還有帶扳手和不帶扳手的。扳手的作用主要是檢查閥瓣的靈活程度，有時也可以用作手動緊急泄壓用。杠桿式安全閥主要依靠杠桿重錘的作用力而工作，但由于杠桿式安全閥體積龐大往往限制了選用范圍。溫度較高時選用帶散熱器的安全閥。

安全溢流閥的主要參數(shù)是排量，這個排量決定于閥座的口徑和閥瓣的開啟高度，由開啟高度不同，又分為微啟式和全啟式兩種。微啟式是指閥瓣的開啟高度為閥座喉徑的1/40～1/20。全啟式是指閥瓣的開啟高度為閥座喉徑的1/4 [1]  。

選用

由操作壓力決定安全閥的公稱壓力，由操作溫度決定安全閥的使用溫度范圍，由計算出的安全閥的定壓值決定彈簧或杠桿的定壓范圍，再根據(jù)使用介質(zhì)決定安全閥的材質(zhì)和結(jié)構(gòu)型式，再根據(jù)安全閥泄放量計算出安全閥的喉徑。以下為安全閥選用的一般規(guī)則。

（1）熱水鍋爐一般用不封閉帶扳手微啟式安全閥。

（2）蒸汽鍋爐或蒸汽管道一般用不封閉帶扳手全啟式安全閥。

（3）水等液體不可壓縮介質(zhì)一般用封閉微啟式安全閥，或用安全泄放閥。

（4）高壓給水一般用封閉全啟式安全閥，如高壓給水加熱器、換熱器等。

（5）氣體等可壓縮性介質(zhì)一般用封閉全啟式安全閥，如儲氣罐、氣體管道等。

（6）E級蒸汽鍋爐一般用靜重式安全閥。

（7）大口徑，大排量及高壓系統(tǒng)一般用脈沖式安全閥，如減溫減壓裝置、電站鍋爐等。

（8）運送液化氣的火車槽車、汽車槽車、貯罐等一般用內(nèi)裝式安全閥。

（9）油罐頂部一般用液壓安全閥，需與呼吸閥配合使用。

（10）井下排水或天然氣管道一般用先導(dǎo)式安全閥。

（11）液化石油氣站罐泵出口的液相回流管道上一般用安全回流閥。

（12）負(fù)壓或操作過程中可能會產(chǎn)生負(fù)壓的系統(tǒng)一般用真空負(fù)壓安全閥。

（13）背壓波動較大和有毒易燃的容器或管路系統(tǒng)一般用波紋管安全閥