武汉恒斯源液压机电设备有限公司
 
A11VLO260DR/11L-NSG12N00，A11VLO130LG2/10L-NSD12N00，A11VO60HD.D/10R-NZD12N00

A11VLO130HD1/10L-NTC12N00，A11VLO145DRG/11R-NSG12N00，A11VLO260DR/11L-NZC12N00

A11VO260LE1/11R-NTG12N00，A11VO130LR3/10R-NSG12N00，A11VO40HD.D/10L-NTC12N00

A11VO75LG1/10R-NZG12N00，A11VO260HD2/11L-NTD12N00，A11VO130DR/10R-NSD12N00

A11VO75DR/10R-NZC12N00，A11VO75EP.G/10L-NTC12N00，A11VO75LG2/10L-NSD12N00

A11VO130HD2/10L-NPD12N00，A11VO95LR.C/10L-NPG12N00，A11VO190EP.D/11L-NTD12N00

A11VLO130LR.C/10L-NZD12N00，A11VO75LR/10R-NTC12N00，A11VLO190HD1/11L-NZC12N00

A11VO75DRL/10L-NTD12N00，A11VO260HD1/11L-NPG12N00，A11VO190LE2/11R-NSG12N00

A11VLO190EP.G/11R-NZC12N00，A11VLO260DR/11L-NSC12N00，A11VLO260EP.D/11L-NTD12N00

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开式系统大多数用于固定式机械，它的主要功能需求是噪声低、自吸能力好、节能。这样进出油口不对称的开式系统用泵、新的节能和与电子技术相结合的变量型式泵就应运而生。又如为了满足系统对于不同压力的需求，又出现了开式油路用重型泵(压力25 MPa以上)和轻型柱塞泵(压力25 MPa以下)这分水岭，但是从近期发展动向看，重型泵轻量化，轻型泵参数重型化的趋势也是渐渐盛行。。

新闻：宣威市A11VLO260LR/11R-NZC12N00液压柱塞泵工作原理：http://www.jdzj.com/jdzjnews/k3_13002938.html