180L1010, Danfoss HPP, 2/2-way Solenoid block valve, type VDHT BL3 3/4 NC NPT N - Normally closed (NC) - Normally Open (NO), National pipe thread (NPT), New Version Slimline (N). The VDHT valve series are designed for several applications in neutral media compatible with the sealing and O-ring materials used. Typical media are water, cleaning fluids and light heating oil. The valves are used in several applications: car wash systems, stationary high pressure cleaning, mobile cleaning vehicles and dust bindings systems, ect.