Two different flow switching valves through the distribution plate into a group of valves to control the hydraulic system of the hydraulic bracket, through the valve switching, control the inlet and outlet of the bracket stand or the upper and lower cavity of the dry jacket to achieve the piston rod stretching and shrinkage. Optimized design for traditional plate valves, compact design, high reliability, long service life, insertable valve core, convenient maintenance. Specifications Rated pressure: 31.5 MPa Rated flow rate: 200 l/min, 500 l/min Interface flow rate: K J10, K J13, K J16, K J19, DN10, DN13, DN16, DN19 Material: medium carbon/stainless steel/1 Cr18Ni9