SL20PB1-4X力士乐液控单向阀，上海韦米机电设备有限公司主营销售产品，原厂原装，质量保障，销售热线：13524123009，在线QQ：2896079243，传真：021-51334670；联系人：雷青。热诚欢迎新老客户咨询购买！
液控单向阀是方向控制阀中的一种。具体分类：
方向控制阀按其在液压系统中的功能分为单向阀和换向阀两大类。
单向阀在液压传动中有普通单向阀和液控单向阀。
(1)保持压力。
滑阀式换向阀都有间隙泄漏现象，只能短时间保压。当有保压要求时，可在油路上加一个液控单向阀，利用锥阀关闭的严密性，使油路长时间保压。
(2)液压缸的“支承”。
在立式液压缸中，由于滑阀和管的泄漏，在活塞和活塞杆的重力下，可能引起活塞和活塞杆下滑。将液控单向阀接于液压缸下腔的油路，则可防止液压缸活塞和滑块等活动部分下滑。
(3)实现液压缸锁紧。
当换向阀处于中位时，两个液控单向阀关闭，可严密封闭液压缸两腔的油液，这时活塞就不能因外力作用而产生移动。
(4)大流量排油。
液压缸两腔的有效工作面积相差很大。在活塞退回时，液压缸右腔排油量骤然增大，此时若采用小流量的滑阀，会产生节流作用，限制活塞的后退速度；若加设液控单向阀，在液压缸活塞后退时，控制压力油将液控单向阀打开，便可以顺利地将右腔油液排出。
(5)作充油阀。
立式液压缸的活塞在高速下降过程中，因高压油和自重的作用，致使下降迅速，产生吸空和负压，必须增设补油装置。液控单向阀作为充油阀使用，以完成补油功能。
(6)组合成换向阀。
在设计液压回路时，有时可将液控单向阀组合成换向阀使用。例如：用两个液控单向阀和一个单向阀并联（单向阀居中），则相当于一个三位三通换向阀的换向回路。需要指出，控制压力油油口不工作时，应使其通回油箱，否则控制活塞难以复位，单向阀反向不能截止液流。
机械压力机，机械压力机用曲柄连杆或肘杆机构、凸轮机构、螺杆机构传动，工作平稳，工作精度高，操作条件好，生产率高，易于实现机械化、自动化，适于在自动线上工作。机械压力机在数量上居各类锻压机械之。冷镦机等各种线材成形自动机、平锻机、螺旋压力机、径向锻造机、大多数弯曲机、矫正机和剪切机也具有与机械压力机相似的传动机构，可以说是机械压力机的派生系列。
机械压力机工作原理
是用曲柄连杆或肘杆机构、凸轮机构、螺杆机构传动，工作平稳、工作精度高、操作条件好、生产率高，易于实现机械化、自动化，适于在自动线上工作。机械压力机在数量上居各类锻压机械之。冷镦机等各种线材成形自动机、平锻机、螺旋压力机、径向锻造机、大多数弯曲机、矫正机和剪切机等，也具有与机械压力机相似的传动机构，可以说是机械压力机的派生系列。行程是可变的，能够在任意位置发出大的工作力。液压机工作平稳，没有震动，容易达到较大的锻造深度，适合于大锻件的锻造和大规格板料的拉深、打包和压块等工作。液压机主要包括水压机和油压机。某些弯曲、矫正、剪切机械也属于液压机一类。
SL20PB1-4X力士乐液控单向阀
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R983040142 SL10GB24XIN010
R983040143 SL10GB3-4XIN010
R983040144 SL10GB4-4X/IN010
R983040145 SL10PA1-4XIN010
R983040146 SL10PA1-4X/VIN010
R983040147 SL10PA2-4XIN010
R983040148 SL10PA2-4X/VIN010
R983040149 SL10PA3-4XIN010
R983040150 SL10PA4-4XIN010
R983040151 SL10PB1-4XIN010
R983040152 SL10PB1-4X/VIN010
R983040153 SL10PB2-4XIN010
R983040154 SL10PB3-4XIN010
R983030717 SL10PB4-4X/IN010
R983030717 SL10PB4-4X/IN010
R978014265 SL10GA2-4X/V/12
R978878966 SL10GB2-4X/12
R900587553 SL15GA1-4X/
R900503225 SL15GA1-4X/V
R900500296 SL15GA2-4X/
R900560578 SL15GA2-4X/V
R900599508 SL15GA3-4X/
R900988233 SL15GA3-4X/V
R900503693 SL15GA4-4X/
R900500952 SL15GB1-4X/
R900768223 SL15GB1-4X/V
R900599993 SL15GB2-4X/
R900509517 SL15GB2-4X/V
R900526533 SL15GB3-4X/
R900501011 SL15GB4-4X/
R900587554 SL20GA1-4X/
R900504557 SL20GA1-4X/V
R900599966 SL20GA2-4X/
R900508234 SL20GA2-4X/V
R900599862 SL20GA3-4X/
R900082340 SL20GA3-4X/V
R900507211 SL20GA4-4X/
R901028141 SL20GA4-4X/V
R900500298 SL20GB1-4X/
R900509551 SL20GB1-4X/V
R900500093 SL20GB2-4X/
R900537233 SL20GB2-4X/V
R900505950 SL20GB3-4X/
R900560497 SL20GB3-4X/V
R900525517 SL20GB4-4X/
R900587554 SL20GA1-45/
R900504557 SL20GA1-45/V
R900599966 SL20GA2-45/
R900508234 SL20GA2-45/V
R900599862 SL20GA3-45/
R900082340 SL20GA3-45/V
R900507211 SL20GA4-45/
R901028141 SL20GA4-45/V
R900500298 SL20GB1-45/
R900509551 SL20GB1-45/V
R900500093 SL20GB2-45/
R900537233 SL20GB2-45/V
R900505950 SL20GB3-45/
R900560497 SL20GB3-45/V
R900525517 SL20GB4-45/
R900587559 SL20PA1-4X/
R983040158 SL20PA1-4X/
R900501547 SL20PA1-4X/V
R900599536 SL20PA2-4X/
R900500870 SL20PA2-4X/V
R900599606 SL20PA3-4X/
R900501197 SL20PA3-4X/V
R900500630 SL20PA4-4X/
R900514669 SL20PA4-4X/V
R900599586 SL20PB1-4X/
R900509458 SL20PB1-4X/V
R900500208 SL20PB2-4X/
R900504955 SL20PB2-4X/V
R900500527 SL20PB3-4X/
R900535425 SL20PB3-4X/V
R900513545 SL20PB4-4X/
R900059865 SL20PB4-4X/V
R900587555 SL25GA1-4X/
R900505867 SL25GA1-4X/V
R900599967 SL25GA2-4X/
R900537308 SL25GA2-4X/V
R900503587 SL25GA3-4X/
R901082906 SL25GA3-4X/V
R900508897 SL25GA4-4X/
R900599965 SL25GB1-4X/
R900503340 SL25GB1-4X/V
R900500616 SL25GB2-4X/
R900537236 SL25GB2-4X/V
R900245356 SL25GB3-4X/
R900518633 SL25GB4-4X/
R900519401 SL25GB4-4X/V
R900587556 SL30GA1-4X/
R900599870 SL30GA1-4X/V
R900500618 SL30GA2-4X/
R900528010 SL30GA2-4X/V
R900500045 SL30GA3-4X/
R900599347 SL30GA3-4X/V
R900510219 SL30GA4-4X/
R901176941 SL30GA4-4X/V
R900500617 SL30GB1-4X/
R900990186 SL30GB1-4X/V
R900502193 SL30GB2-4X/
R900537235 SL30GB2-4X/V
R900524111 SL30GB3-4X/
R900536798 SL30GB4-4X/
R900587560 SL30PA1-4X/
R900500095 SL30PA1-4X/V
R900599473 SL30PA2-4X/
R900599473 SL30PA2-42/
R900514206 SL30PA2-4X/V
R900599553 SL30PA3-4X/
R900518694 SL30PA3-4X/V
R900501652 SL30PA4-4X/
R900501897 SL30PA4-4X/V
R900599968 SL30PB1-4X/
R900508354 SL30PB1-4X/V
R900503740 SL30PB2-4X/
R900058475 SL30PB2-4X/V
R900505807 SL30PB3-4X/
R900564927 SL30PB3-4X/V
R900513491 SL30PB4-4X/
R900212472 SL30PB4-4X/V
液压传动
与机械传动相比。液压传动更容易实现其运动参数(流量)和动力参数(压力)的控制，而液压传动较之液力传动具有良好的低速负荷特性。由于具有传递效率高，可进行恒功率输出控制，功率利用充分，系统结构简单，输出转速无级调速，可正、反向运转，速度刚性大，动作实现容易等突出优点，液压传动在工程机械中得到了广泛的应用。几乎所有工程机械装备都能见到液压技术的踪迹，其中不少已成为主要的传动和控制方式。极限负荷调节闭式回路，发动机转速控制的恒压，恒功率组合调节的变量系统开发，给液压传动应用于工程机械行走系提供了广阔的发展前景。