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专营销售力士乐液压元件: 柱塞泵A10VSO、电磁阀4WE、电磁阀3WE、溢流阀DBW、DBDS、DB、3DR、节流阀Z2S、Z2F、叶片泵PV7、PVV、齿轮泵PH2,PH4,PGF、HM20/HM17压力传感器、压力继电器HED、博世放大器、放大板 、阀0811、0820 、齿轮泵0510、减压阀DR、ZDR、4WREE,马达伺服驱动 电机等系列特价现货优势供应
阀对流量的控制可以分为两种：
一种是开关控制：要么全开、要么全关，流量要么*大、要么*小，没有中间状态，如普通的电磁直通阀、电磁换向阀、电液换向阀。
另一种是连续控制：阀口可以根据需要打开任意一个开度，由此控制通过流量的大小，这类阀有手动控制的，如节流阀，也有电控的，如比例阀、伺服阀。
VT-DFP-A-2X/G24KO/0/V VT-DFP-A-2X/G24KO/0/V VT-DFP-A-2X/G24KO/0/V
VT-DFP-A-2X/G24KO/0/V VT-DFP-A-2X/G24KO/0/V VT-DFP-A-2X/G24KO/0/V
所以使用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。
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AA10VSO45DFR1/31R-PPA12N00(R910908725)
AA10VSO71DFR1/31R-PPA12N00(R910944440)
AA10VSO100DFR1/31R-PPA12N00(R910922744)
VT17370-1X/(R900786020)
PVV2-1X/068RA15DMB(R900935466)
FD16FB2X/300B03V(R900504003)
2FRM16-3X/100L(R900424905)
4WREE6W32-2X/G24K31/A1V(R900911004)
4WREE6E08-2X/G24K31/A1V(R900912156)
4WREE6E16-2X/G24K31/A1V(R900920567)
4WREE6E32-2X/G24K31/A1V(R900907114)
4WRTE25E220L-4X/6EG24K31/A1M(R900954281)
DR30-5-5X/100YM(R900597260)
DBDS30P1X/50(R900423716)
伺服阀的主阀一般来说和换向阀一样是滑阀结构，只不过阀芯的换向不是靠电磁铁来推动，而是靠前置级阀输出的液压力来推动，这一点和电液换向阀比较相似，只不过电液换向阀的前置级阀是电磁换向阀，而伺服阀的前置级阀是动态特性比较好的喷嘴挡板阀或射流管阀。
VT-VRPD-2-2X/V0/0-0-1(R901066987)
4WRE10E75-2X/G24K4/V(R900954102)
DBW10A2-5X/200-6EG24N9K4(R900926249)
DBW10A2-5X/315-6EG24N9K4(R900926054)
DBW20A2-5X/200-6EG24N9K4(R900939204)
DBW20A2-5X/315-6EG24N9K4(R900921754)
Z2S6-1-6X/(R900347495)
Z2S10-1-3X/(R900407394)
Z2S22-1-5X/(R900432915)
Z2FS6-2-4X/2QV(R900481624)
Z2FS10-5-3X/V(R900517812)
AA10VSO10DR/52R-PPA14N00(R910990406)
AA10VSO18DFR1/31R-PPA12N00(R910945178)
AA10VSO28DFR1/31R-PPA12N00(R910910590)
PV7-1X/10-14RE01MC0-16(R900580381)
PV7-1X/10-20RE01MC0-10(R900534143)
PV7-1X/16-20RE01MC0-16(R900580382)
4WRAP6W7-04-2X/24K4/M(R900581366)
4WRAP6W7-02-2X/24K4/M(R900581365)
伺服阀其实缺点极多：能耗浪费大、容易出故障、抗污染能力差、价格昂贵等等等等，好处只有一个：动态性能是所有液压阀中*高的。就凭着这一个优点，在很多对动态特性要求高的场合不得不使用伺服阀，如飞机火箭的舵机控制、汽轮机调速等等。动态要求低一点的，基本上都是比例阀的天下了。
R901077004 4WRTE35E1-1000L-4X/6EG24K31/A1M
R900033823 VT-VSPA1-1-1X
R900955887 3DREP6C-2X/25EG24N9K4/M
R910920752 AEA10VSO100DFR1/31R-PPA12N00
R910999927 AEA4VSO180DR/30R-PPB13N00
R900915814 2FRE16-43/160LBK4M
R900703811 VT-DFP-A-2X/G24KO/0/V
R901088911 PR4-3X/8,00-500RA01M01
R900424288 DBDS30K1X/315
R900424286 DBDS30K1X/200
HMS02.1N-W0028N-07-NNNN
HDS03.2-W100N-HSI2-01-FW
0811404832 4WRBA10E64-2X/G24N9Z4/M
R900912703 LFA32E-7X/CA40DQMG24F
R901277267 4WRZM16W6-150-1X/6EG24N9ETK4/D3M
4WREE10E75-2X/G24K31/F1V(R900927356)
4WREE10W75-2X/G24K31/F1V(R900948360)
R480060815
DBEM10-7X/315YG24K4M(R901335399)
Z4WE10x250-1X/CG24N9K4(R901291612)
A10VSO100DFR1/32R-VSB12N00-S1439(R902450324)
HCS02.1E-W0070-A-03-NNNN R911298372
3DREPE6C-2X/25EG24N9K31/A1M R900958788
3DREPE6C-2X/25EG24N9K31/F1M R900958848
3DREPE6C-2X/25EG24N9K31/A1V R900925484
0811404603,4WRPH6C3B40L-2X/G24K0/A1M
伺服阀与比例阀的区别
伺服阀与比例阀之间的差别并没有严格的规定，因为比例阀的性能越来越好，逐渐向伺服阀靠近，所以近些年出现了比例伺服阀。
比例阀和伺服阀的区别主要体现在以下几点：
1.驱动装置不同。比例阀的驱动装置是比例电磁铁；伺服阀的驱动装置是力马达或力矩马达；
2.性能参数不同。滞环、中位死区、频宽、过滤精度等特性不同，因此应用场合不同，伺服阀和伺服比例阀主要应用在闭环控制系统，其它结构的比例阀主要应用在开环控系统及闭环速度控制系统；
AA10VSO140DFR1/31R-VPB12N00(R910945253)
AA4VSO355LR2G/30R-PPB13N00(R902411516)
R900772317 4WS2EM10-5X/60B11T315K31CV-114
DBEM10-7X/50YG24K4M(R901335405)
DBEM10-7X/100YG24K4M(R901335402)
DBEM10-7X/200YG24K4M(R901335400)
4WREE10E75-2X/G24K31/A1V(R900927230)
3DR10P5-6X/200Y/00M(R900916660)
4WRPEH6C4B40L-2X/G24K0/A1M(0811404613)
DREM10-6X/200YG24K4M(R901277137)
4WRZE25W8-220-7X/6EG24N9ETK31/F1D3M(R900746375)
AA4VSO180DFE1/30R-PPB13N00(R902430589)
3FREZ6B-1X/35L2G24-27Z4MM(0811403114)
VT-VRPA1-527-10/V0/QV(0811405098)
DREBE6X-1X/75MG24K31F1M(R901084277)
4WRPNH6C3B04L-2X/M/24PF6G(0811403559)
VT-VPCD-1-1X/V0/1-P-1(R901089559)
VT-HACF-1X/03,0/HACD&(R900776897)
0532004204
ZDBT-XP8-1X/315(0811104111)
LR32DB10E1X/(1818509231)
LR25F40E1X/(1818509296)
4WRL16V200M-3X/G24Z4/M(0811404207)
4WREE6W16-2X/G24K31/A1V(R900925657)
4WREE10W75-2X/G24K31/A1V(R900927233)
AA10VSO45DFR1/31R-PPA12N00(R910908725)
PGH5-3X/125RE11VU2(R901147118)
H-4WMM16J7X/F(R900927809)
Z2FS16-8-3X/S2(R900457256)
Z2FS22-8-3X/S2(R900443176)
AZPF-11-008RCB20MB(0510425009)
AZPF-11-011RCB20MB(0510525009)
SCA16BZ2X/M(R900425666)
ZDC16P-2X/M(R900489668)
ZDC25P-2X/M(R900344369)
4WRPEH6C3B40L-2X/G24K0/F1M(0811404634)
4WRPEH6C4B40L-2X/G24K0/F1M(0811404353)
AA4VSO71DR/10R-PPB13N00
AA4VSO125DR/30R-PPB13N00
AA4VSO180DR/30R-PPB13N00
AA4VSO250DR/30R-PPB13N00
AA10VSO45DR/31R-PPA12N00
AA10VSO71DR/31R-PPA12N00
AA10VSO100DR/31R-PPA12N00
AA10VSO140DR/31R-PPB12N00
AA10VSO71DRS/32R-VPB22U99
AA10VSO100DRS/32R-VPB12N00
AA10VSO140DRS/32R-VPB12N00
R900052392,M-3SED6CK1X/350CG24N9K4
R900052621,M-3SED6UK1X/350CG24N9K4
R900566273,M-3SEW6C3X/420MG24N9K4
R900566283,M-3SEW6U3X/420MG24N9K4
M-3SED10UK1X/350CG24N9K4(R900051053)
M-3SED10CK1X/350CG24N9K4(R900086685)
4WREE6V1-32-2X/G24K31/A1V(R900914841)
4WREE6E08-2X/G24K31/A1V-655(R900950341)
4WREE6E16-2X/G24K31/A1V-655(R900950342)
4WREE6E32-2X/G24K31/A1V-655(R900962181)
4WRAE6E30-2X/G24K31/A1V(R900954071)
