H-10?
DG4V 3 6C VM U1 H7 60 ?DG5V-7-3C-M-U-H7-30 ?DG5V-10-W-3C-M-W-H-10?
DG4V 3 6C VM U1 H7 60 ?DG4V-3-6C-M-P-H7-60-EN96 ?DG5V-8-H-0AL-E-M-U-H-10?
DG5V 7 2A 1 T M U H5 40 ?DG17V-2-6N-5-10 ?DG5V-8-H-0AL-E-M-U-H-10?
DG4V 3S 6N VM U H5 60 ?DG4V-3-6B-M-P-H7-60-EN95 ?DG5S4-048C-T-V-MUD5-60?
DG5S H8 2A M U H5 50 ?DG4V-3S-0B-M-P-H5-60-EN9 ?DG5S4-048C-T-V-MUD5-60?
DG5V H8 6C 2 T M U H5 30 ?DG5V-7-33C-2-VM-U-H7-30 ?DG4V-3-2C-M-U-D6-60-EN21?
DG5S H8 6C T M U H5 50 ?DG4V-3-8C-VM-U-ED6-61 ?DG4V-3-2C-M-U-D6-60-EN21?
DG5V 7 33C T 30 EN55 ?DG4V-3-8BL-VM-U-H7-61 ?DG5S4-042N-M-U-D5-60?
DG5V 7 2A M U H5 40 ?DG4V-3S-2AL-VM-U-C5-60 ?DG5S4-042N-M-U-D5-60?
DG5V 7 2A T M U H5 40 ?DG4V-3-8C-VM-U1-H7-61 ?DG5S-H8-2BL-E-M-U-H5-30?
DG5V 7 2B T M U H5 40 ?DG4V-3-2A-VM-U-P7-60 ?DG5V-7-521N-2-M-U-H5-40?
DG5V 7 2C M U H5 40 ?DG4V 3S 23A M U H5 60 ?DG4S4L 012A 220AC50 50?
DG5V 7 2C M U C6 30 ?DG5S-H8-2A-2-M-U-H5-50 ?DG4S4L 012A 220AC50 50?
DG5V 7 6C 2 M U H5 40 ?DG4V-3S-22A-VM-U-H5-60 ?DG4V 5 7C M U A6 20?
DG5V 7 6C M U H5 40 ?DG4V-3S-22A-VM-U-H5-60 ?DG4V 5 8BLJ VM U H6 20?
DG5V 7 6C T M U H5 40 ?DG4V-2-6C-VM-U-H6-10 ?DG4V 5 31CJ M U H6 20?
DG5V 7 6C T V M U H5 40 ?DG5S4 040AL M U H5 60 ?DG4V 5 7CJ M U H6 20?
DG5V 7 8C K VM U H5 40 ?DG5S4 040AL M U H5 60 ?DG4V 5 6C MU EK6 20?
DG5V 7 8C VM U H5 40 ?DG5S4-042AL-T-M-U-H5-60 ?DG4V 5 6NJ M U H6 20?
DG5V H8 2C M U H5 30 ?DG5S4-042AL-T-M-U-H5-60 ?DG4V 5 2NJ VM U H6 20?
DG4V 3S 2A M FTW B5 60 ?DG5S4-046AL-E-M-U-H5-60 ?DG4V 5 0BJ MU H6 20?
DG4V 3S 2A M FTW B5 60 ?DG5S4-046AL-E-M-U-H5-60 這種連接通常是將閥門進(jìn)出端部加工成錐管或直管螺紋,可使其連接到錐管螺紋接頭或管路上。由于這種連接可能出現(xiàn)較大的泄漏溝道,故可用密封劑、密封膠帶或填料來堵塞這些溝道。如果閥體的材料是可以焊接的,但膨脹系數(shù)差異很大,或者工作溫度的變化幅度范圍較大,螺紋連接部必須進(jìn)行蜜封焊。螺紋連接的閥門主要是公稱通經(jīng)在50mm以下的閥門。如果通徑尺寸過大,連接部的安裝和密封十分困難。?
為了便于安裝和拆卸螺紋連接的閥門,在管路系統(tǒng)的適當(dāng)位置上可用管接頭。公稱通徑在50mm以下的閥門可使用管套節(jié)作為管接頭,管套節(jié)的螺紋將連接的兩部分連接在一起。?
法蘭連接的閥門,其安裝和拆卸都比較方便。但是比螺紋連接的閥門笨重,相應(yīng)價(jià)格也價(jià)高。故它適用于各種通徑和壓力的管道連接。但是,當(dāng)溫度超過350度時(shí),由于螺栓、墊片和法蘭一變松弛,也明顯地降低螺栓的負(fù)荷,對(duì)受力很大的法蘭連接可能產(chǎn)生泄漏。?
這種連接適用于各種壓力和溫度,在較荷刻的條件下使用時(shí),比法蘭連接更為可靠。但是焊接連接的閥門拆卸和重新安裝都比較困難,所以它的使用限于通常能長(zhǎng)期可靠地運(yùn)行,或使用條件荷刻、溫度較高的場(chǎng)合。如火力發(fā)電站、核能工程、乙烯工程的管道上。?
公稱通徑在50mm以下的焊接閥門通常具有焊接插口來承接荷平面端的管道。由于承插焊接在插口與管道間形成縫隙,因而有可能使縫隙受到某些介質(zhì)的腐蝕,同時(shí)管道的振動(dòng)會(huì)使連接部位疲勞,因此承插焊接的使用受到一定的限制。?
在公稱直徑較大,使用條件荷刻,溫度較高的場(chǎng)合,閥體常采用坡口對(duì)焊接,同時(shí),對(duì)焊接縫有原格要求,必須選用技術(shù)過硬的焊工完成此項(xiàng)工作。 ?
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