A4VSO泵具有泵具有噪音低、体积小、自吸能力好、可靠性高等优点。在闭式系统上应用，油泵变量过零位时一般柱塞泵都有托盘现象，唯独D-A4VSO泵有效解决此类问题，因补油泵、控制泵可以串接、控制阀可以集成在泵盖上，其结构非常紧凑;另外，比例泵均带有位移传感器闭式反馈回路，其零位控制精度非常高。广泛应用于：冶金行业、锻压行业、船舶行业、船舶等等领域。A4VSO系列规格有40、71、125、180、250:;变量形式有恒压，恒功率、液动、负载感应、比例、伺服、压力流量复合控制形式;有开式系统泵和闭式系统泵。A10-FR01B-12,A10-FR01C-12,A10-FR01H-12,
A70-FR01BS-60,A70-FR01CS-60,A70-FR01HS-60,A70-FR01KS-60,
A90-FR01BS-60,A90-FR01CS-60,A90-FR01HS-60,A90-FR01KS-60,
A145-FR01BS-60,A145-FR01CS-60,A145-FR01HS-60,A145-FR01KS-60,
A16-F-R-01-B-K-32,A16-F-R-01-C-K-32,A16-F-R-01-H-K-32,
A22-F-R-01-B-K-32,A22-F-R-01-C-K-32,
A37-F-R-01-B-K-32,A37-F-R-01-C-K-32,A37-F-R-01-H-K-32,
A56-F-R-01-B-K-32,A56-F-R-01-C-K-32,A56-F-R-01-H-K-32,
A220-F-R-01-B-S-60,A220-F-R-01-C-S-60,A220-F-R-01-H-S-60,A220-F-R-01-K-S-60.
A125-F-R-01-B-S-60,A125-F-R-01-C-S-60,A125-F-R-01-H-S-60,A125-F-R-01-K-S-60.
A16-F-R-01-B-S-K-32,A16-F-R-01-C-S-K-32,A16-F-R-01-H-S-K-32,
A22-F-R-01-B-S-K-32,A22-F-R-01-C-S-K-32,
A37-F-R-01-B-S-K-32,A37-F-R-01-C-S-K-32,A37-F-R-01-H-S-K-32,
A56-F-R-01-B-S-K-32,A56-F-R-01-C-S-K-32,A56-F-R-01-H-S-K-32,
A70-LR01BS-60,A70-LR01CS-60,A70-LR01HS-60,A70-LR01KS-60,
A90-LR01BS-60,A90-LR01CS-60,A90-LR01HS-60,A90-LR01KS-60,
A145-LR01BS-60,A145-LR01CS-60,A145-LR01HS-60,A145-LR01KS-60,
A16-L-R-01-B-K-32,A16-L-R-01-C-K-32,A16-L-R-01-H-K-32,
A22-L-R-01-B-K-32,A22-L-R-01-C-K-32,
A37-L-R-01-B-K-32,A37-L-R-01-C-K-32,A37-L-R-01-H-K-32,
A56-L-R-01-B-K-32,A56-L-R-01-C-K-32,A56-L-R-01-H-K-32,
A220-L-R-01-B-S-60,A220-L-R-01-C-S-60,A220-L-R-01-H-S-60,A220-L-R-01-K-S-60.
A125-L-R-01-B-S-60,A125-L-R-01-C-S-60,A125-L-R-01-H-S-60,A125-L-R-01-K-S-60.
A16-L-R-01-B-S-K-32,A16-L-R-01-C-S-K-32,A16-L-R-01-H-S-K-32,
因此这些风机运行时，只有靠调节风门或风道挡板的开度来满足生产工艺对风量的要求。风机机械特性为平方转矩特性，风机运行时，靠调节风门或者风道档板的开度来调节风机风量的方法，称为节流调节。在节流调节过程中，风机固有特性不变，仅仅靠关小风门或挡板的开度，人为地增加管路的阻力，由此增大管路系统的损失，不利于风机的节能运行。采用调速控制装置，通过改变风机的转速，从而改变风机风量以适应生产工艺的需要，这种调节方式称为风机的调速控制。
