力士乐REXROTH先导式减压阀,REXROTH液压阀现货,REXROTH郑州现货 REXROTH减压阀是通过调节,将进口压力减至某一需要的出口压力,并依靠介质本身的能量,使出口压力自动保持稳定的阀门。从流体力学的观点看,REXROTH减压阀是一个局部阻力可以变化的节流元件,即通过改变节流面积,使流速及流体的动能改变,造成不同的压力损失,从而达到减压的目的。然后依靠控制与调节系统的调节,使阀后压力的波动与弹簧力相平衡,使阀后压力在一定的误差范围内保持恒定。 REXROTH止回阀用途广泛,有很多种类,下面说的是供水和热力常用的止回阀: 1、弹簧式:液体由下而上,依靠压力顶起弹簧控制的阀瓣,压力消失后,弹簧力将阀瓣压下,封闭液体倒流。常用于通径较小的止回阀。 2、重力式:和弹簧式相似,依靠阀瓣的自身重力封闭,防止倒流。 3、旋启式:液体在阀体内直通,依靠压力顶开一侧的旋转阀瓣,压力失去后,阀瓣依靠自重回位,反向的液体压力封闭阀瓣。 4.塑料隔膜式: 外壳和隔膜均为塑料.一般外壳为ABS,PE,PP,NYLON, PC.隔膜有硅树脂,氟树脂等. 其它的单向阀(止回阀),如排污的止回阀,人防的防爆阀和液体使用的止回阀的原理是大同小异。 德国REXROTH液压阀货号、型号: R900968833 4WS2EM6-2X/10B12ET315K17EV力士乐Rexroth R900968259 4WS2EM10-5X/60B11ET315K31AV R900967562 4WS2EB10-4X/10B2ET40K8AV R900967548 4WS2EM10-4X/45B3T315K8CV力士乐Rexroth R900966344 4WS2EM10-4X/45B3T315K8CV-94 R900966097 4WS2EM16-2X/150B12T315K8EV R900966039 4WS2EM10-4X/20B2T315K8EV力士乐Rexroth R900965624 4WS2EE10-4X/45B2T210K8DV R900965141 4WS2EM10-4X/75B2T315K8DV R900964991 4WS2EM10-4X/5B2ET315K8DV力士乐Rexroth R900964903 4WS2EM10-4X/75B3T315K8CV R900964149 4WS2EB10-4X/60B2ET70K8DM R900963401 4WS2EM10-4X/20B3T315K8DV-24力士乐Rexroth R900961862 4WS2EM10-4X/10B2ET315K8BV-52 R900961403 4WS2EM10-4X/5B2ET315K8BV-52 R900961254 4WS2EM10-4X/5B3T315K8DV-24力士乐Rexroth R900961252 4WS2EM10-4X/10B3T315K8DV-24 R900960971 4WS2EM10-4X/30B2T315K8EV R900960652 4WS2EM16-2X/150B12T315K8CV-104力士乐Rexroth R900960651 4WS2EM10-4X/75B3T315K8CV-24 R900960575 4WS2EM16-2X/200B12ET315K8EV R900960539 4WS2EB10-4X/45B2ET40K8AV力士乐Rexroth R900960302 4WS2EM10-4X/20B4ET315K8EV R900960229 4WS2EM10-4X/10B3T315K8DV R900958815 4WS2EM10-4X/30B1ET315K8BV力士乐Rexroth R900958263 4WS2EM10-5X/20B11-315K31EV R900957873 4WS2EM16-2X/200B12ET315K8DV R900957872 4WS2EM10-4X/75B3ET315K8DV力士乐Rexroth R900956874 4WS2EM10-5X/30B11ET315K31DV R900956873 4WS2EM10-5X/45B11ET315K31DV R900956598 4WS2EM10-5X/75B11T315K31DV力士乐Rexroth R900956422 4WS2EM10-5X/60B11-210K31EV R900956128 4WS2EM10-5X/10B11ET315K31EV R900952651 4WS2EM10-5X/45B11-315K31EV力士乐Rexroth R900951573 4WS2EM10-4X/5B2ET315K8BM-52 R900951452 4WS2EM6-2X/20B11ET315K17EV R900951451 4WS2EM6-2X/15B11ET315K17EV力士乐Rexroth R900951450 4WS2EM6-2X/10B11ET315K17EV R900951449 4WS2EM6-2X/5B11ET315K17EV R900950971 4WS2EM10-4X/20B2ET315K8EV力士乐Rexroth R900950929 4WS2EM6-2X/2B11ET315K17EV R900950890 4WS2EM10-5X/30B11T315K31EV 力士乐REXROTH先导式减压阀,REXROTH液压阀现货,REXROTH郑州现货 |