Spool type, pilot operated directional solenoid valves available in three or four way configurations. They are operated by a directional valve type SDHE (see technical table SHE015) equipped with threaded solenoids for AC or DC power supply and certified accor-ding to North American Standard CURUS. Spools are fully interchangeable and they are available in a wide range of hydraulic configurations. The valve body is made by shell-moulding castings machined by transfer lines and then cleaned by thermal deburring. Optimized flow paths largely cored with extrawide channels to tank ensures low pressure drops