Enerpac Hydraulics [India] Pvt. Ltd. Manufactures Solenoid Inline Check Valves, DO3. Enerpac Hydraulics [India] Pvt. Ltd. Produces high-force tools, equipment and accessories applicable in industrial markets. The Solenoid Inline Check Valves are applicable for DO3 mounting pattern. It is a directional valve and is used in dual flow control operations. Two types of valves are there like Pilot operated check valves and Pressure reducing valve.