This model is applied to 6--7T hydraulic excavator, all kinds of hydraulic open-circuit equipment, hydraulic industrial equipment and concrete machinery. With clockwise and anticlockwise rotation, constant power, constant pressure, constant flow, load sensing, pressure cutting-off and other control functions, this model is characteristics with simple structure, small size, light weight, low noise, long service life and others. With clockwise and anticlockwise rotation, constant power, constant pressure, constant flow, load sensing, pressure cutting-off and other control functions, this model is characteristics with simple structure, small size, light weight, low noise, long service life and others. 14T/Dextrorotatory, can be used for Rexroth 6-8ton, DH70, Levol 75, SANY65/75; 17T/Levorotatory, can be used for Jigong 60; 14T/Dextrorotatory,without gear pump, can be connected 28pump, used for DH85/Kato 250-7(with gear pump).