力士樂(lè)截止閥買(mǎi)賣(mài)網(wǎng)/REXROTH中國(guó)
REXROTH先導(dǎo)式壓力截止閥的閥瓣一旦從關(guān)閉位置移開(kāi)，閥座和閥瓣密封面之間就不再有接觸，因而它密封面機(jī)械磨損很小，故其密封性能是很好的缺點(diǎn)是密封面間可能會(huì)夾住流動(dòng)介質(zhì)中的顆粒。但是如果把閥瓣做成鋼球或瓷球，這個(gè)問(wèn)題也就迎韌而解了由于大部分截止閥的閥座和閥瓣比較容易修理或更換，而且在修理或更換密封元件時(shí)無(wú)需把整個(gè)閥門(mén)從管線(xiàn)上拆卸下來(lái)，這在閥門(mén)和管線(xiàn)焊成一體的場(chǎng)合是非常適用的由于介質(zhì)通過(guò)此類(lèi)閥門(mén)時(shí)的流動(dòng)方向發(fā)生了變化，因此截止閥的zui小流阻也較高于大多數(shù)其他類(lèi)型的閥門(mén)。然而，根據(jù)閥體結(jié)構(gòu)和閥桿相對(duì)于進(jìn)、出口通道的布局，這種狀況是可以改善的同時(shí)．由于截止閥瓣開(kāi)與關(guān)之間行程小，密封面又能承受多次啟閉，因此它很適用于需要頻繁開(kāi)關(guān)的場(chǎng)合。 
REXROTH先導(dǎo)式壓力截止閥可用于大部分介質(zhì)流程系統(tǒng)中。已研制出滿(mǎn)足石化、電力、冶金、城建、化工等部門(mén)各種用途的多種形式的截止閥。 
REXROTH先導(dǎo)式壓力截止閥的使用極為普遍，但由于開(kāi)啟和關(guān)閉力矩較大、結(jié)構(gòu)長(zhǎng)度較長(zhǎng)，通常公稱(chēng)通徑都限制在 250mm 以下，也有到 400mm 但選用時(shí)需特別注意進(jìn)出口方向。一般 15Omm 以下的截止閥介質(zhì)大都從閥瓣的下方流入，而 2O0mm 以上的截止閥介質(zhì)大都從閥瓣的上方流入。這是考慮到閥門(mén)的關(guān)閉力矩所致。為了減小開(kāi)啟或關(guān)閉力矩，一般 2O0mm 以上的截止閥都設(shè)內(nèi)旁通或外旁通閥門(mén)。
原裝力士樂(lè)截止閥常規(guī)型號(hào)列舉
R900417080  DR 10-4-4X/100YV  
R900493531  DR 10-4-4X/200YM  
R900415429  DR 10-4-4X/200Y  
R900343865  DR 10-4-4X/200YV  
R900419996  DR 10-4-4X/315YM  
R900414331  DR 10-4-4X/315Y  
R900487566  DR 10-4-4X/315YV  
R900415131  DR 10-5-4X/50YM  
R900342169  DR 10-5-4X/50YMV  
R900413987  DR 10-5-4X/50Y  
R900418188  DR 10-5-4X/50YV  
R900403624  DR 10-5-4X/100YM  
R900496085  DR 10-5-4X/100YMV  
R900402741  DR 10-5-4X/100Y  
R900416915  DR 10-5-4X/100YV  
R900415492  DR 10-5-4X/200YM  
R900494935  DR 10-5-4X/200YMV  
R900402064  DR 10-5-4X/200Y  
R900489326  DR 10-5-4X/200YV  
R900413543  DR 10-5-4X/315YM  
R900494764  DR 10-5-4X/315YMV  
R900479797  DR 10-5-4X/315Y  
R900414742  DR 10-5-4X/315YV  
R900491633  DR 10-6-4X/50YM  
R900492311  DR 10-6-4X/50Y  
R900484674  DR 10-6-4X/50YV  
R900414031  DR 10-6-4X/100YM  
R900328487  DR 10-6-4X/100YMV  
R900406176  DR 10-6-4X/100Y  
R900413273  DR 10-6-4X/100YV  
R900416290  DR 10-6-4X/200YM  
R900370601  DR 10-6-4X/200YMV  
R900490317  DR 10-6-4X/200Y  
R901187257  DR 10-6-4X/200YV  
R900497035  DR 10-6-4X/315YM  
R900419827  DR 10-6-4X/315Y  
R900485993  DR 10-6-4X/315YV  
R900505387  DR 10-7-4X/50YM  
R900979167  DR 10-7-4X/50Y  
R900957428  DR 10-7-4X/100YM  
R900525638  DR 10-7-4X/100Y  
R900548438  DR 10-7-4X/200YM  
R900557620  DR 10-7-4X/315YM  
R900491160  DR 10 G4-4X/50YM  
R900337057  DR 10 G4-4X/50YMV  
R900417877  DR 10 G4-4X/100YM  
R900380177  DR 10 G4-4X/100YMV  
R900418977  DR 10 G4-4X/200YM  
R900389031  DR 10 G4-4X/200YMV  
R900491997  DR 10 G4-4X/315YM  
R900497848  DR 10 G4-4X/315YMV  
R900417918  DR 10 G5-4X/50YM  
R900332750  DR 10 G5-4X/50YMV  
R900418436  DR 10 G5-4X/100YM  
R900341479  DR 10 G5-4X/100YMV  
R900413544  DR 10 G5-4X/200YM  
R900362113  DR 10 G5-4X/200YMV  
R900415481  DR 10 G5-4X/315YM  
R900333139  DR 10 G5-4X/315YMV  
R900401023  DR 10 G6-4X/50YM  
R900350540  DR 10 G6-4X/50YMV  
R900487009  DR 10 G6-4X/100YM  
R900487488  DR 10 G6-4X/200YM  
R900497877  DR 10 G6-4X/315YM  
R900346754  DR 10 G6-4X/315YMV  
R900587505  DR 10 G7-4X/50YM  
R900501694  DR 10 G7-4X/50YMV  
R900588895  DR 10 G7-4X/100YM  
R900503509  DR 10 G7-4X/200YM  
R900599151  DR 10 G7-4X/315YM  
R900416914  DR 15 G4-4X/50YM  
R900417876  DR 15 G4-4X/100YM  
R900499985  DR 15 G4-4X/200YM  
R900331085  DR 15 G4-4X/200YMV  
R900417079  DR 15 G4-4X/315YM  
R900419533  DR 15 G5-4X/50YM  
R900486754  DR 15 G5-4X/50YMV  
R900491659  DR 15 G5-4X/100YM  
R900592919  DR 15 G5-4X/100YMV  
R900408738  DR 15 G5-4X/200YM  
R901138867  DR 15 G5-4X/200YMV  
R900412084  DR 15 G5-4X/315YM  
R900378952  DR 15 G6-4X/50YM  
R900409917  DR 15 G6-4X/100YM  
R900382491  DR 15 G6-4X/200YM  
R900419182  DR 15 G6-4X/315YM  
R900599007  DR 15 G7-4X/50YM  
R900972864  DR 15 G7-4X/100YMV  
R901000756  DR 15 G7-4X/315YM  
R900341415  DR 20-4-4X/50YM  
R900491192  DR 20-4-4X/50Y  
R900513956  DR 20-4-4X/50YV  
R900414624  DR 20-4-4X/100YM  
R900494763  DR 20-4-4X/100YMV  
R900404826  DR 20-4-4X/100Y  
R900396385  DR 20-4-4X/100YV  
R900418952  DR 20-4-4X/200YM  
R900415430  DR 20-4-4X/200Y  
R900450299  DR 20-4-4X/200YV  
R900414625  DR 20-4-4X/315YM  
R900392613  DR 20-4-4X/315YMV  
R900414021  DR 20-4-4X/315Y  
R900522060  DR 20-4-4X/315YV  
R900417653  DR 20-5-4X/50YM  
R900409342  DR 20-5-4X/50Y  
R900901458  DR 20-5-4X/50YV  
R900412382  DR 20-5-4X/100YM  
R900411282  DR 20-5-4X/100YMV  
R900404828  DR 20-5-4X/100Y  
R900496084  DR 20-5-4X/100YV  
R900412660  DR 20-5-4X/200YM  
R900333145  DR 20-5-4X/200YMV  
R900402753  DR 20-5-4X/200Y  
R900346230  DR 20-5-4X/200YV  
R900479799  DR 20-5-4X/315YM  
R900405904  DR 20-5-4X/315Y  
R900413642  DR 20-5-4X/315YV  
R900334200  DR 20-6-4X/50YM  
R900348409  DR 20-6-4X/50Y  
R900483243  DR 20-6-4X/50YV  
R900419768  DR 20-6-4X/100YM  
R900412666  DR 20-6-4X/100Y  
R900417376  DR 20-6-4X/100YV  
R900486504  DR 20-6-4X/200YM  
R900522295  DR 20-6-4X/200YMV  
R900495191  DR 20-6-4X/200Y  
R900497351  DR 20-6-4X/315YM  
R900415337  DR 20-6-4X/315Y  
R900565909  DR 20-7-4X/100YM  
R900506938  DR 20-7-4X/200YM  
R900474528  DR 20 K4-1X/50YM  
R900341292  DR 20 K4-1X/50YMV  
R900474529  DR 20 K4-1X/100YM  
R900493308  DR 20 K4-1X/100YMV  
R900474530  DR 20 K4-1X/200YM  
R900352253  DR 20 K4-1X/200YMV  
R900474531  DR 20 K4-1X/315YM  
R900340679  DR 20 K4-1X/315YMV  
R900474524  DR 20 K5-1X/50YM  
R900493309  DR 20 K5-1X/50YMV  
R900474525  DR 20 K5-1X/100YM  
R900493941  DR 20 K5-1X/100YMV  
R900474526  DR 20 K5-1X/200YM  
R900499618  DR 20 K5-1X/200YMV  
R900474527  DR 20 K5-1X/315YM  
R900491714  DR 20 K5-1X/315YMV  
R900409464  DR 20 K6-1X/50YM  
R900409468  DR 20 K6-1X/50YMV  
R900409465  DR 20 K6-1X/100YM  
R900409469  DR 20 K6-1X/100YMV  
R900409466  DR 20 K6-1X/200YM  
R900409470  DR 20 K6-1X/200YMV  
R900409467  DR 20 K6-1X/315YM  
R900409471  DR 20 K6-1X/315YMV  
R900588090  DR 20 K7-1X/50YM  
R900502197  DR 20 K7-1X/50YMV  
R900589192  DR 20 K7-1X/100YM  
R900973014  DR 20 K7-1X/100YMV