Пропорциональный редукционный клапан, прямого действия 3DREP…XE

Description Size 6 Component series 2X Max. operating pressure 100 bar Flow, max. 15 l/min Area of application in accordance with the Explosion Protection Directive 2014/34/EU: II 2G; II 2D Type of protection valve: – Ex h IIC T4 Gb X according to EN 80079-36 – Ex h IIIC T130°C Db X according to EN 80079-36 Type of protection, solenoid coil: – Ex eb mb IIC T4 Gb according to EN 60079-7 / EN 60079-18 – Ex tb IIIC T115°C Db according to EN 60079-31 Solenoid coil certified according to IECEx Features 3-way version For intended use in potentially explosive atmosphere For pressure control in ports A and B For subplate mounting Porting pattern according to ISO 4401-03-02-0-05 (but without locating hole) Solenoid coil is rotatable by 90° Electrical connection as individual connection with cable gland Product description Valves of type 3DREP are direct operated 3-way pressure reducing valves with proportional solenoids. They convert an electrical input signal into a proportional pressure output signal. The proportional solenoids are controllable wet-pin DC solenoids. The solenoids are actuated by external control electronics. Set-up The valve basically consists of: Housing (1) with connection surface Control spool (2) with pressure measuring pins (3 and 4) Solenoids (5 and 6) with central thread Function The pressure in A or B is set by means of the proportional solenoids. The amount of the pressure depends on the current. With de-energized solenoids (5, 6), the control spool (2) is held in the central position by means of the compression springs (8). Ports A and B are connected with T so that the hydraulic fluid can flow off to the tank without obstructions. When one proportional solenoid is actuated, e.g. solenoid "b" (5), the pressure measuring pin and the control spool (2) are moved to the left. This opens the connection from P to A and B to T via orifice-type cross-sections with progressive flow characteristic. With the surface of the pressure measuring pin (3), the pressure that builds up in channel A acts on the control spool (2) and against the solenoid force. The pressure measuring pin (3) is supported by the solenoid "a". If the pressure exceeds the value set at solenoid "b", the control spool (2) is pushed back against the solenoid force and connects A to T until the set pressure is achieved again. The pressure is proportional to the solenoid current. When the solenoid is switched off, the control spool (2) is returned into the central position by the compression springs (8). Notice: Regarding valves of the version "3DREP 6 C", only one solenoid may be actuated at a time. Valve with two spool positions (Version "A" and "B") The function of this valve version basically corresponds to the valve with three spool positions. This 2-spool position valve is, however, only equipped with solenoid "a" (6) or solenoid "b" (5). Instead of the second proportional solenoid, there is a plug screw (7). Notice: The tank line must not be allowed to run empty. W