力士乐截止阀买卖网/REXROTH中国 REXROTH先导式压力截止阀的阀瓣一旦从关闭位置移开，阀座和阀瓣密封面之间就不再有接触，因而它密封面机械磨损很小，故其密封性能是很好的缺点是密封面间可能会夹住流动介质中的颗粒。但是如果把阀瓣做成钢球或瓷球，这个问题也就迎韧而解了由于大部分截止阀的阀座和阀瓣比较容易修理或更换，而且在修理或更换密封元件时无需把整个阀门从管线上拆卸下来，这在阀门和管线焊成一体的场合是非常适用的由于介质通过此类阀门时的流动方向发生了变化，因此截止阀的zui小流阻也较高于大多数其他类型的阀门。然而，根据阀体结构和阀杆相对于进、出口通道的布局，这种状况是可以改善的同时．由于截止阀瓣开与关之间行程小，密封面又能承受多次启闭，因此它很适用于需要频繁开关的场合。 REXROTH先导式压力截止阀可用于大部分介质流程系统中。已研制出满足石化、电力、冶金、城建、化工等部门各种用途的多种形式的截止阀。 REXROTH先导式压力截止阀的使用极为普遍，但由于开启和关闭力矩较大、结构长度较长，通常公称通径都限制在 250mm 以下，也有到 400mm 但选用时需特别注意进出口方向。一般 15Omm 以下的截止阀介质大都从阀瓣的下方流入，而 2O0mm 以上的截止阀介质大都从阀瓣的上方流入。这是考虑到阀门的关闭力矩所致。为了减小开启或关闭力矩，一般 2O0mm 以上的截止阀都设内旁通或外旁通阀门。 原装力士乐截止阀常规型号列举 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
