DG4V-3-2A-M-P7-H-7-50VICKERS威格士定量泵壳内灌满被输送的液体；启动后，启动后，叶轮由轴带动高速转动，叶片间的液体也必须随着转动。在离心力的作用下，液体从叶轮中心被抛向外缘并获得能量，以高速离开叶轮外缘进入蜗形泵壳。在蜗壳中，液体由于流道的逐渐扩大而减速，又将部分动能转变为静压能，后以较高的压力流入排出管道，送至需要场。液体由叶轮中心流向外缘时，在叶轮中心形成了一定的真空，由于贮槽液面上方的压力大于泵入口处的压力，液体便被连续压入叶轮中。可见，只要叶轮不断地转动，液体便会不断地被吸入和排出。
VICKERS双联定量泵的轴是便心安装。 简单来说定量泵的转速选定后，他的流量和压力就确定了，就不能调节。变量泵的输出流量可以根据系统的压力变化(外负载的大小)，自动地调节流量，就是压力高时输出流量小，压力低时输出流量大，这样他可以节省液压元件的数量，从而简化了油路系统，而且可以减少油发热。缺点是流量脉动严重，系统压力不太平稳，泵的寿命短，泵的轴承容易坏，因为他是便心安装，而且泵的嘈音大。
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DG4V-3-2A-M-P7-H-7-50VICKERS威格士定量泵:拖拉机按每转吸、排油次数和轴承上受的径向力的情况，又分为单作用式和双作用式。叶片泵在机床液压系统中应用广。
①双作用式叶片泵(定量泵)
双作用叶片泵结构紧凑、流量均匀、传动平稳、噪声小，但结构复杂、吸油性能差、对油液的污染很敏感。用于功率较小、精度较高的液压设备，如磨床液压系统。
②单作用式叶片泵(变量泵)
单作用限压式变量泵结构复杂，轮廓尺寸大，相对运动部件多，液压阀泄露大，吸、压油腔各一个，泵轴有不平衡的径向液压力作用，噪声较大，效率比双作用叶片泵低，但它能按负载大小自动调节流量，功率应用比较合理。一般用于负载较大并有快速和慢速工作行程的液压设备，例如组合机床液压系统。
③柱塞泵。柱塞泵按柱塞的排列方式分为径向柱塞泵和轴向柱塞泵两种，轴向柱塞泵应用更为广泛。
轴向柱塞泵结构紧凑、径向尺寸小、惯性小、容积效率高，但其轴向尺寸较大，结构比较复杂。一般用于负载大、功率大的设备，如刨床、拉床、压力机、工程机械等高压系统。
DG4V-3-2A-M-P7-H-7-50VICKERS威格士定量泵型号：
PVH131L12AF30B282000001AD2AA010A PVH131C-LAF-12D-11-C28V-31
PVH131L12AF30B252000001AD100010A PVH131C-LAF-12S-10-C25V-31
PVH131L12AF30B252000001AD1BG010A PVH131C-LAF-12S-10-C25V-31-159
PVH131L12AF30K250000001AD100010A PVH131C-LAF-12S-10-EDC25-10
PVH131L12AF30A130000AG1AD1AA010A PVH131C-LAF-12S-11-C13-31
PVH131L16AF30A250000001AD100010A PVH131C-LAF-16S-10-C25-31
PVH131L16AF30B252000001AD100010A PVH131C-LAF-16S-10-C25V-31
PVH131L16AF30D180006001AT1AA010A PVH131C-LAF-16S-11-C18T6-31-CD-031
PVH131L16AF30D250004001AD1AA010A PVH131C-LAF-16S-11-C25T4-31
PVH131L02AF30B212000001AD200010A PVH131C-LAF-2D-10-C21V-31-036
PVH131L02AF30B212000001AD2AA010A PVH131C-LAF-2D-11-C21V-31-036
PVH131L03AF30E272015001AD2AA010A PVH131C-LAF-3D-11-C27VT15-31
PVH131L03AF30A250000001AD100010A PVH131C-LAF-3S-10-C25-31
PVH131L03AF30B252000001AD100010A PVH131C-LAF-3S-10-C25V-31
PVH131L03AF30E252004001AD1AA010A PVH131C-LAF-3S-11-C25VT4-31
PVH131L03AF30F282014001AT1AA010A PVH131C-LAF-3S-11-C28VT14S-31-31
PVH131L12AF30B252000001AJ200010A PVH131C-LBF-12D-10-C25V-31
PVH131L12AF30B252000001AJ100010A PVH131C-LBF-12S-10-C25V-31
PVH131L12AF30B252000001AY100010A PVH131C-LBF-12S-10-C25V-31-114
PVH131L12AF30B502000001AJ1AA010A PVH131C-LBF-12S-11-C31V-31
PVH131L02AF30B162000001AJ1AA010A PVH131C-LBF-2S-11-C16V-31
PVH131L02AF30B252000001AJ1AA010A PVH131C-LBF-2S-11-C25V-31
PVH131L03AF30B252000001AJ1AA010A PVH131C-LBF-3S-11-C25V-31
PVH131L12AF30B252000001AM2AA010A PVH131C-LCF-12D-11-C25V-31
PVH131L12AF30B482000001AA1AA010A PVH131C-LCF-12S-11-C275V-31-CD-114
PVH131L16AF30B252000001AM100010A PVH131C-LCF-16S-10-C25V-31
PVH131L03AF30B252000001AM1AA010A PVH131C-LCF-3S-11-C25V-31
PVH131L12AF30AAA010A PVH131C-LF-12D-11-C25-31
PVH131L12AF30B25200000100100010A PVH131C-LF-12S-10-C25V-31
PVH131L12AF30BAM010A PVH131C-LF-12S-10-C25V-31-118
PVH131L33AF30BAA010A PVH131C-LF-13D-11-C25V-31-259
PVH131L13AF30A25000000100100010A PVH131C-LF-13S-10-C25-31
PVH131L13AF30B25200000100100010A PVH131C-LF-13S-10-C25V-31
PVH131L13AF30B192000AK1001AA010A PVH131C-LF-13S-11-C19V-31-188
PVH131L13AF30BAA010A PVH131C-LF-13S-11-C25V-31
PVH131L29AF30B25200000100100010A PVH131C-LF-29S-10-C25V-31-046
PVH131L29AF30B25340000100100010A PVH131C-LF-29S-10-C25V34-31-CD-046
PVH131L02AF30B21200000100200010A PVH131C-LF-2D-10-C21V-31-046
PVH131L02AF30BAA010A PVH131C-LF-2D-11-C25V-31
PVH131L02AF30BAA010A PVH131C-LF-2D-11-C25V-31-214
PVH131L02AF30B25200000100100010A PVH131C-LF-2S-10-C25V-31-046
PVH131L02AF30B252000AL1001AP010A PVH131C-LF-2S-10-C25V-31-208
PVH131L02AF30B192000AA1001AA010A PVH131C-LF-2S-11-C19VB-31-CD
PVH131L02AF30BAA010A PVH131C-LF-2S-11-C25V-31-046
PVH131L02AF30BAA010A PVH131C-LF-2S-11-C25V31-31
PVH131L02AF30B282000AR1001AT010A PVH131C-LF-2S-11-C28VB-31-220
PVH131L02AF30B282000BK1001AT010A PVH131C-LF-2S-11-C28VB-31-255
PVH131L03AF30BAA010A PVH131C-LF-3D-11-C17V-31
PVH131L03AF30A25000000100100010A PVH131C-LF-3S-10-C25-31
PVH131L03AF30B25200000100100010A PVH131C-LF-3S-10-C25V-31
PVH131L03AF30K25000000100100010A PVH131C-LF-3S-10-EDC25-10
PVH131L03AF30EAA010A PVH131C-LF-3S-11-C25VT15-31
PVH131L12AJ30BAA010A PVH131C-LSF-12S-11-C25V-31
PVH131L13AF30A25000000200100010A PVH131C-LSF-13S-10-C25-31
PVH131L02AJ30BAA010A PVH131C-LSF-2S-11-C25V-31
PVH131L03AF30B25200000200100010A PVH131C-LSF-3S-10-C25V-31
PVH131L03AF30BAP010A PVH131C-LSF-3S-10-C25V-31-164
PVH131L03AF30B252000AL2001AP010A PVH131C-LSF-3S-10-C25V-31-208
PVH131R12AF30B202000001AD200010A PVH131C-RAF-12D-10-C20V-31
PVH131R12AF30B252000001AD2AA010A PVH131C-RAF-12D-11-C25V-31
PVH131R12AF30B252000AA1AD2AA010A PVH131C-RAF-12D-11-C25VB-31
PVH131R12AF30E252013001AD2AA010A PVH131C-RAF-12D-11-C25VT13-31
PVH131R12AF30B332000001AD2AA010A PVH131C-RAF-12D-11-C33V-31-039
PVH131R12AF30B252000001AD100010A PVH131C-RAF-12S-10-C25V-31
PVH131R16AF30D250004001AD2AA010A PVH131C-RAF-16D-11-C25T4-31
PVH131R16AF30A250000001AD100010A PVH131C-RAF-16S-10-C25-31
PVH131R16AF30B252000001AD100010A PVH131C-RAF-16S-10-C25V-31
PVH131R16AF30A070000001AD100010A PVH131C-RAF-16S-10-CM7-31
PVH131R16AF30D250015001AD1AA010A PVH131C-RAF-16S-11-C25T15-31
PVH131R16AF30C250004001AD1AA010A PVH131C-RAF-16S-11-C25T4S-31
PVH131R16AF30B252000001AD1AN010A PVH131C-RAF-16S-11-C25V-31-115
PVH131R16AF30E252004001AD1AA010A PVH131C-RAF-16S-11-C25VT4-31
PVH131R02AF30B142000001AD200010A PVH131C-RAF-2D-10-C14V-31-036
PVH131R02AF30A250000001AT1AA010A PVH131C-RAF-2S-11-C25-31-196
PVH131R02AF30B252000001AD1AA010A PVH131C-RAF-2S-11-C25V-31-036
PVH131R03AF30B252000001AD200010A PVH131C-RAF-3D-10-C25V-31
PVH131R03AF30F282014001AD2AA010A PVH131C-RAF-3D-11-C28VT14S-31
PVH131R03AF30A250000001AD100010A PVH131C-RAF-3S-10-C25-31
PVH131R03AF30B252000001AD100010A PVH131C-RAF-3S-10-C25V-31
PVH131R03AF30B252000001AD1AP010A PVH131C-RAF-3S-10-C25V-31-164
PVH131R03AF30B252000001AD1AP010A PVH131C-RAF-3S-10-C25V-31-166
PVH131R03AF30B252000AL1AD1AP010A PVH131C-RAF-3S-10-C25V-31-208
PVH131R03AF30A070000001AD100010A PVH131C-RAF-3S-10-CM7-31
DG4V-3-2A-M-P7-H-7-50VICKERS威格士定量泵
