AST 08 valve is a specially designed auxiliary valve for Steyr tractors. The switch lever attached to the valve, enables it to control the single - double action hydraulic attachments on the tractor. Technical Characteristics - Nominal Flow : 45 lt/min - Max Operating Pressure : 315 Bar - Max Back Pressure : 30 Bar - Recomended Oil Viscosity : 5,4 - 11,4 CST (100°C) - Recommended Oil Filtering : Max 30 micron - Parallel Circuit, Series Circuit Load Hold Check Valve Adjustable Direct Operated Relief Valve Single - Double Action