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Directional seat valves type SEC are solenoid-actuated directional seat valves that control the start, stop, and direction of a flow, available in 3/3, 4/2, or 4/3-way versions with a maximum operating pressure of 400 bar and maximum flow of 25 l/min. They feature wet-pin DC solenoids, a rotatable solenoid coil, and corrosion-protected versions. The valves have a weight range of 2.1-2.4 kg, can operate in any installation position, and have an ambient temperature range of -40°C to +80°C with NBR seals or -20°C to +50°C with FKM seals. The hydraulic fluid temperature range is -25°C to +80°C with NBR seals or -20°C to +80°C with FKM seals, and the viscosity range is 4-500 mm²/s. The valves require a cleanliness class of 20/18/15 according to ISO 4406 and can be used with various hydraulic fluids, including mineral oils, bio-degradable fluids, and flame-resistant fluids. Electric specifications include direct voltage, available voltages of 12V and 24V, and a power consumption of 30W. The valves have a duty cycle of 100%, switching time of max. 60ms, and maximum switching frequency of 2000 1/h.