Description Size 8 Component series A Maximum operating pressure 250 bar Maximum flow 20 l/min Features Pilot control valve Mounting cavity R/T-9A Direct-controlled directional slide valve with solenoid actuation Flow possible in both directions Positive overlap prevents switching shocks Wet-pin DC solenoids Solenoid coil can be rotated With concealed manual override, optional Product description General information The 3/2 directional spool valves are direct operated, pressure-compensated screw-in cartridge valves. They control the start, stop and direction of flow and basically consist of housing (1), control spool (2) and a return spring (3). Function In the de-energized condition, the control spool (2) is held in the initial position by the return spring (3). The control spool (2) is actuated by wet-pin DC solenoids (4). The symbols are realized by different spools (C, U and G). The main ports 1, 2 and 3 can be loaded continuously with an operating pressure of 250 bar and the flow can be directed into both directions (see Symbols). The manual override (5) allows for the switching of the valve without solenoid energization. Version "K4" (with mating connector) Type KKDEN8GA/SN9V Version "C4" Version "K40" Type code (valve without coil)1) 01 02 03 04 05 06 07 08 09 KKDE N 8 A / S V * 01 Directional spool valve, direct operated, electrically operated KKDE 02 Maximum operating pressure 250 bar N 03 Component size 8 04 3 main ports Symbols C U G 05 Component series A 06 Standard performance and mounting cavity R/T-8A (see Mounting cavity) S 07 Without manual override N0 With manual override N9 Seal material 08 FKM seals (other seals upon request) Observe compatibility of seals with hydraulic fluid used. V 09 Further details in the plain text * 1) Complete valves with mounted coil on request. Technical data general Size 8 Installation position any Ambient temperature range °C -40 … +120 Weight Valve kg 0.17 Coil kg 0.2 electrical Voltage type Direct voltage Power supply 1) V 12 24 Voltage tolerance against ambient temperature see voltage tolerance characteristic curve Power consumption W 18 Duty cycle % 100 Maximum coil temperature 2) °C 150 Switching time according to ISO 6403 ON ms ≤ 80 OFF ms ≤ 50 Maximum switching frequency 1/h 15000 Protection class according to DIN EN 60529 (VDE 0470-1), DIN 40050-9 Version "K4" IP65 (If a suitable and a correctly mounted mating connector are used.) Version "C4" IP66 with mating connector mounted and locked IP69K with Rexroth mating connector (material no. R901022127) Version "K40" IP69K with mating connector mounted and locked 1) Other voltages upon request 2) Due to the surface temperatures of the solenoid coils, the standards ISO 13732-1 and EN 982 need to be adhered to! hydraulic Size 8 Maximum operating pressure 1) bar 250 Maximum flow l/min 20 Hydraulic fluid see table Hydraulic fluid temperature range °C -40 … +80 Viscosity range mm²/s 4 … 500 Maximum admissible degree of contamination of the hydraulic
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