派克比例阀D31FBA31CC4NKW0结构原理：输入信号增大，供气用电磁阀先导阀1换向，而排气用电磁先导阀7处于复位状态，则供气压力从SUP口通过阀1进入先导室5，先导室压力上升，气压力作用在膜片2的上方，则和膜片2相连的供气阀芯4便开启，排气阀芯3关闭，产生输出压力。此输出压力通过压力传感器6反馈至控制回路8。在这里，与目标值进行快速比较修正，知道输出压力与输入信号成一定比例为止，从而得到输出压力与输入信号的变化成比例的变化。由于没有喷嘴挡板机构，故阀对杂质不敏感，可靠性高。
派克比例阀D31FBA31CC4NKW0特点:可实现压力、速度的无极调节，避免了常通的开关式气阀换向时的冲击现象。能实现远程控制和程序控制。与断续控制相比，系统简化，元件大大减少。与液压比例阀相比，体积小、重量轻、结构简单、成本较低，但响应速度比液压系统慢得多，对负载变化也比较敏感。使用功率小、发热少、噪声低。不会发生火灾，*。受温度变化的影响小。
除了派克比例阀D31FBA31CC4NKW0外，派克比例阀还有如下型号：
D31FBA31CC1NF00 D31FBB31CC1NF00 D31FBB31CC4NF00
D31FBB31CC4NG00 D31FBB31DC1NF00 D31FBB31DC4NF00
D31FBB31DC4VF00 D31FBB31EC2NF00 D31FBB31EC4NF00
D31FBB31EC4NS00 D31FBB31EC5NF00 D31FBB32CC1NF00
D31FBB32CC1NG00 D31FBB32CC1NS00 D31FBB32CC2NS00
D31FBB32CC4NF00 D31FBB32CC4NG00 D31FBB32CC4NS00
D31FBB32DC1NF00 D31FBB32DC1NG00 D31FBB32DC1NS00
D31FBB32DC4NF00 D31FBB32DC4NS00 D31FBB32EC1NF00
D31FBB32EC1NS00 D31FBB32EC1VF00 D31FBB32EC2NF00
D31FBB32EC2NS00 D31FBB32EC4NF00 D31FBB32EC4NS00
D31FBE01CC1NF00 D31FBE01CC1NG00 D31FBE01CC1NS00
D31FBE01CC1VF00 D31FBE01CC2NF00 D31FBE01CC2NM00
D31FBE01CC4NF00 D31FBE01CC4NF08 D31FBE01CC4NG00
D31FBE01CC4NS00 D31FBE01CC4VG00 D31FBE01CC5NF00
D31FBE01CK4NF00 D31FBE01DC1NF00 D31FBE01DC1NS00
D31FBE01DC2NF00 D31FBE01DC2VS00 D31FBE01DC4NF00
D31FBE01DC4NS00 D31FBE01DE1NS00 D31FBE01EC1NF00
D31FBE01EC1NS00 D31FBE01EC2NF00 D31FBE01EC4NF00
D31FBE01EC4NF08 D31FBE01EC4NS00 D31FBE01EC4NW50
D31FBE01EC4VW50 D31FBE01EK1NF00 D31FBE01EK1NS00
D31FBE02CC1NF00 D31FBE02CC1NG00 D31FBE02CC1NS00
D31FBE02CC2NF00 D31FBE02CC2NS00 D31FBE02CC4NF00
D31FBE02CC4NG00 D31FBE02CC4NS00 D31FBE02CC4VF00
D31FBE02CC4VS00 D31FBE02DC1NF00 D31FBE02DC1NS00
D31FBE02DC2NS00 D31FBE02DC4NF00 D31FBE02DC4NS00
D31FBE02EC1NS00 D31FBE02EC2NF00 D31FBE02EC4NF00
D31FBE02EC4NF08 D31FBE02EC4NS00 D31FBE02EC4VF08
D31FBE02EC4VS00 D31FBE02EC4VW50 D31FBE02EC5NF00
派克比例阀先导式比例方向阀有4个尺寸:
D31FB NG10 (CETOP 5)
D41FB NG16 (CETOP 7)
D91FB NG25 (CETOP 8)
D111FB NG32 (CE*0)
派克比例阀或伺服阀的目的就是:以电控方式实现对流量的节流控制(当然经过结构上的改动也可实现压力控制等)，既然是节流控制，就必然有能量损失，伺服阀和其它阀不同的是，它的能量损失更大一些，因为它需要一定的流量来维持前置级控制油路的工作。 |
