BSG Solenoid Controlled Relief Valves 

These valves are a combination of a pilot operated relief valve and a solenoid operated directional valve. Piping between the two is eliminated as the solenoid valve is directly mounted on the relief valve and connected with the relief valve vent. Pump pressure may be unloaded remotely by an electrical signal to the solenoid, or by connecting pilot relief valves to the solenoid valve ports.Haohong Hydraulic also has other types of Pressure Reducing Valves and Directional Control Valves.