SPX Stone/Fenner part number VF-4009. This is a Deltrol #10175-45, Pilot-Operated Solenoid Valve Cartridge. The part number that is stamped into the housing is DSV-080-2NCP-N. This is a very common valve used in many hydraulic power unit applications for dump trailers, landscape trailers, lift gates, hoists, boat lifts, etc.

Description:
Normally-Closed, Two-Way, Two-Position, Pilot-Operated Solenoid Valve
This cartridge valve is designed with positive shut off to be used in load holding applications.

I am a full line supplier and stocking distributor for SPX Stone/Fenner and Power Team.
For technical assistance or compatibility questions please feel free to message Jason at National Hydraulic Supply.