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（1）液压系统设计时为提高系统稳定性，减少负载变化对速度的影响，要么牺牲部分我们想实现的功能，要么增加额外的液压元件，如调速阀、压力控制阀等，通过增加阻尼，提高系统速度刚度来提高系统的稳定性。但是这样元件的增加又会降低效率，浪费能源；还会使得整个系统的可靠性降低、增加成本。 D3FBE01MCONG00
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（2）由于换向结构的特殊性，使得用户在实现某一功能时必须购买相应的液压元件，再加上工程机械厂家会根据不同最终用户要求设计出相应的功能，这样会造成生产厂家采购同类、多规格的液压控制元件来满足不同功能要求的需要，不利于产品通用化及产品管理parker工件夹具FM6DDKV
parker阀门RS10R35S4SN1JW
parker工件夹具PRDM2PP16KVG
parker滤芯15CN-2 CORELESS 10Q 936704Q
parker柱塞泵PV032R1K1A4NFTZ
parker控制器Compax3 C3S015V4F11I20T11M00
parker气缸SMHA60601,45110V65C74
parker电磁阀线圈495905C2
parker柱塞泵PV046R1K1T1NKL CX5801
parker节流阀FM6DDKV
parker液压阀PVAC2MCMNSJW85
parker节流阀RS10R17S4SN1JW15
parker接头YAYA-8-8C
parker接头YAYA-11-11C
parker接头YAYA-6-6C
parker接头YAYA-10-10C
parker接头YAYA-16-16C
parker减压阀D3W009CNJW
parker电磁阀D1VW004ENJW（24V）
parker比例换向阀D31FHE01C4NB00
parker电磁阀PSB250AV1A
parker电磁阀D1VW006KVJW
parker电磁阀D1VW034FNJW
parker电磁阀PGP502A0012CH1H1NE3E2B1B1 75
parker电磁线圈AK-D1VWCJW91
parker短行程气缸PD35344-0005
parker传感控制器SCPSD-016-04-17
parker电磁阀D1VW020DNYW
parker液压马达F11-010-HU-CV-K-000-000-0
parker压力传感器SCPSD-400-14-15
parker轴间活塞泵86
parker减压阀PRDM2PP16SVG15
parker换向阀D1VW001KNJWTI4N91
parker换向阀D1VW015CNJW91
parker换向阀D1VW073KNJWTI4N91
parker液压阀D3W001KNJW
parker液压阀D3W002ENJW
parker放大板PWD00A-400
parker换向阀D1FBE01CC0NMW0
parker单向阀CPOM2DDV56
parker流量控制阀FM2DDKV55
parker流量控制阀FM2DDSV55
parker压力开关PS1-E181
parker液压阀ZNS AB 02 5 S0 D1
parker阀门E121K63-4270-486265A7
parker液压调节阀F3-01-050
parker液压阀F130CF-02-HK28-001
parker无刷电机MB101644 380V
parker阀D1FPE01MC9NB00
parker插装阀RDH103S50
parker润滑组件66
parker传感器SCP-400-24-06
parker放大器PWDXXA-400
parker油泵51 11 11 11481
parker阀R230-03B
parker阀门PCMS800S/YY9.201.533
parker液压马达MR1100G-F1N1N1S1NX1000/34985
parker止回阀D1VW001CNJW91
parker止回阀D3W001CNJW42
parker止回阀D1VW008CNJW91
parker液压泵 F11-010-MB-CV-K-000-000-0
parker压力传感器SCLTSD-520-10-07
parker齿轮泵84
parker止回阀D41FHB31C1NE0048
parker阀D1FVE02BCVXW25
parker止回阀D3FBB32MC0NF0017
parker比例阀D1FVE02BCVF0A37 No:D1FVE02BCVF0A
parker压力补偿器SPC0201101C5A
parker压力补偿器SPC0611X10CB1
parker压力传感器P4BN2001A003( P3P-RP91C400D G40A)
parker止回阀D3FBB32MC0NF00
parker止回阀D1FBE02FC0NF00
parker电磁阀LCM3PP02V
parker齿轮泵PGP502A0025CH1H1NE3E2B1B1 76
parker止回阀R4V10-591-12-09G0Q-A1 s-nr: 026-75816-H
parker减压阀D1FVE02BCVG0A37
parker阀CPOM4DDHTV
parker滤芯936708Q
parker滤芯936704Q
parker柱塞泵PV016L1K1T1NMMC
Parker Denison阀4D01 3151 0101 C1G0Q(026-54113-H)
parker压力开关P8S-GRFLX2
parker止回阀D31FHE02C1NB0047
parker阀门D41FBE01FC4NF00
parker泵TE0065MW260AAAB
parker泵F12-060-MS-SV-T-000-000-0 NO.
parker泵F11-010-HU-CV-D-000-000-0 Art.-Nr.
parker泵F11-010-HU-CV-K-000-000-0
parker电磁阀PS1-E121
parker电磁阀PS1-E111
parker溢流阀026-37714-0
parker液压马达F11-006-MB-CV-K-000-000-0
parker阀PRDM2PP35SVG15X797
parker液压阀F400S
parker液压阀D3W020BNTW
parker压力开关PSB100AF1A5
parker压力开关PSB250AF1A5
parker电磁阀D1SE30BNJW
parker电磁阀D1VW004ENUW
parker齿轮泵58 PGP511A0220AS1H3VJ7J5B1B1
parker液位传感器SCLTSD-520-00-07
parker液压阀D3W020BNJW
parker液压阀D1VW034CNJW
parker阀门D1SE83BNJW
parker阀门ZUDB1PT2Z07K
parker注油器10MFP240SA
parker齿轮泵PGP620A0460CD1H3NE6E5B1B1
parker液压泵F11-019-MB-CN-K-000
parker齿轮泵PV032R1K1AYNMTP
parker齿轮泵84 PGP511A0070CA1H2NL1L1B1B1
parker液压泵
parker液压泵
parker阀PGP517A0700CM2H2NP5P3B1B1
parker滤芯270L223A
parker阀门DSDA1002P07E
parker液压阀PRDM2PP16SVG
parker减压阀PRDM2PP16SVG
parker减压阀PRDM2PP06SVG
parker阀RE06M17W2V1XW20
parker阀TDA050EW09B2NXW20
parker泵PVP16364R26A4M12
parker阀CPOM2DDV
parker液压阀D1FPE50MA9NB00
parker液压阀D1VW002KNJW
parker比例阀D31FBE01DC4NFOO10
parker液压马达F11-005-MB-CN-K-000
parker液压马达F12-080-MF-IV-K-000-000-P
parker柱塞泵PV023R1K1T1NMF1
parker阀门MV800S-V，同时会大大提高产品成本。
（3）由于执行机构进出液压油通过一根阀芯进行控制，单独控制执行机构两侧压力是不可能的。因此，出油侧背压作用于执行机构运动的反方向，随着出油侧背压升高，为保质执行机构的运动，必须提高进油侧压力。这样会使得液压系统消耗的功能增加，效率低，发热增加。
采用双阀芯技术的液压系统，由于执行机构进出油侧阀口阀芯位置及控制方式各自独立，互不影响，这样通过对两阀芯控制方式的不同组合，利用软件编程能很好解决传统单阀系统不能解决的问题，同时还可以轻易实现传统液压系统中难以实现的功能。
SCPSD2501405
SCPSD-250-14-05X
SCPSD-250-14-15-LIX
SCPSD2501405ZZ
SCPSD-250-14-15-LOG
SCPSD-250-14-15
SCPSD-250-14-15X
SCPSD2501415
SCPSD-250-14-17
SCPSD-250-14-15-ATP
SCPSD-250-14-17-EN
SCPSD-250-14-15ATPX
SCPSD-250-14-17-ENX
SCPSD-250-14-15-EN
SCPSD-250-14-17X
SCPSD-250-14-15-HZL
SCPSD-250-14-25
SCPSD-250-14-15-LI
SCPSD-250-14-25X
SCPSD-250-14-25.2
SCPSD-3000P-07-27X
SCPSD-250-14-27
SCPSD-3000P-17-15
SCPSD-250-14-27-EN
SCPSD-3000P-17-17
SCPSD-250-14-27-ENX
SCPSD-3000P-17-25
SCPSD-250-14-27X
SCPSD-3000P-1725
SCPSD-250-14-45
SCPSD-3000P-17-25X
SCPSD-3000P-07-17
SCPSD-3000P-17-27
SCPSD-3000P-07-27
SCPSD-3000P-1727
SCPSD-3000P-0727
SCPSD-3000P-17-27X
SCPSD-400-LI
SCPSD-400-04-16X
SCPSD-400-04-05
SCPSD-400-04-17
SCPSD-400-04-05X
SCPSD-400-04-17-EN
SCPSD-400-04-06
SCPSD-400-04-17X
SCPSD-400-04-07
SCPSD-400-04-19-LI
SCPSD4000407
SCPSD-400-04-19-LIX
SCPSD-400-04-07X
SCPSD-400-04-26
SCPSD-400-04-16
SCPSD-400-04-26X
SCPSD-400-04-27
SCPSD-400-14-05X
SCPSD-400-04-27-EN
SCPSD4001405ZZ
SCPSD-400-04-27X
SCPSD-400-14-07
SCPSD-400-14-LI
SCPSD-400-14-15
SCPT-600-40-07X SCTSD-L-110FS-500FO-17
SCPT-600-42-07 SCTSD-L-135FS-185FO
SCPT-600-42-07X SCTSD-L-135FS-185SO
SCPT-601-02-02-PQC SCTSD-L-135SO-185FO
SCPT-6U080710 SCTSD-L-160FO-200FO-17
SCPT-8017 SCTSD-L-165FS-215FO
SCPT-8017X SCTSD-L-165FS-215FO-17
SCPT-8183 SCTSD-L-190FS-220FO-17
SCPT-8183A SCTSD-L-190FS-277FO
SCTSD-L-190FS-277FO-17 SCTSD-150-03-07
SCTSD-L-280FO-330FO SCTSD-150-10-05
SCTSD-L-60SO-135FO SCTSD-150-10-05-HZL
SCTSD-L 9047 SCTSD-150-10-05X
SCTSD-L 9048 SCTSD-150-10-07
SCTSD-150-00-06 SCTSD-150-10-07X
SCTSD-150-00-06X SCTSD-150-12-05
SCTSD-150-00-07 SCTSD-150-12-07
SCTSD-150-00-07X SCTSD-150-13-05
SCTSD-150-13-07 SCLSD-14.6-07-07
SCTSD-250F-00-07 SCLSD-14.6-17-05
SCTSD-250F-10-05 SCLSD-14.6-17-07
SCTSD-250F-10-07 SCLSD-20.5-07-07
SCTSD-250F-15-07 SCLSD-20.5-17-05
SCTSD-250-00-07 SCLSD-20.5-17-07
SCLSD-250-10-07 SCLSD-250-00-07
SCLSD-250-10-07X SCLSD-250-00-07X
SCLSD-370-00-07 SCLSD-250-10-05
SCLSD-370-00-07X SCLSD-520-00-07X
SCLSD-370-10-05 SCLSD-520-10-05-HZL
SCLSD-370-10-05-HZL SCLSD-520-10-07
SCLSD-370-10-07 SCLSD-520-10-07X
SCLSD-370-10-07X SCLSD-700-10-07
SCLSD-520-00-07 SCLSD-9.85-07-07
SCLTSD-250-00-07X SCLTSD-14.6-07-07
SCLTSD-250-00-7 SCLTSD-14.6-17-05
