2/2, 3/2 и 4/2 распределительные клапаны седельного типа, прямого действия, с электромагнитным управлением SEW 6…XE

Description Features 2/2-, 3/2- or 4/2-way version Porting pattern according to ISO 4401-03-02-0-05 (but without locating hole) Safe switching also with longer standstill periods under pressure Air-gap DC and AC solenoids Solenoid coil is rotatable by 90° Electrical connection with individual connection and cable gland With concealed manual override, optional Product description 2/2 and 3/2 directional seat valve General Directional valves of the type SEW are direct operated directional seat valves with solenoid actuation. It controls the start, stop and direction of flow. The directional valves basically comprise a housing (1), the solenoid (2), the hardened valve system (3) and the control spool (8). Basic principle In the initial position, the control spool (8) is pressed onto the seat by the spring (9) and in spool position by the solenoid (2). The force of the solenoid (2) acts via the angled lever (6) and the ball (7) on the control spool (8) that is sealed on two sides. The chamber between the two sealing elements is connected to port P. Thus, the valve system (3) is pressure-compensated in relation to the actuating forces (solenoid or return spring). Notices: The 3/2 directional seat valves have a "negative spool overlap". Therefore, port T must always be connected. That means that during the switching process – from the starting of the opening of one valve seat to the closing of the other valve seat – ports P–A–T are connected with each other. This process takes, however, place within such a short time that it is irrelevant in nearly all applications. The manual override (10) allows for the switching of the valve without solenoid energization. Make sure that the specified maximum flow is not exceeded. A throttle insert must be used for flow limitation, if necessary (see table "Throttle insert, check valve insert"). The seat arrangement offers the following options: 2/2 directional seat valve 3/2 directional seat valve Symbol P U Initial position P and T connected P and A connected, T blocked Spool position P blocked P blocked, A and T connected Symbol N C Initial position P blocked P blocked, A and T connected Spool position P and T connected P and A connected, T blocked Type M-2SEW 6 N...XE... Type M-3SEW 6 U...N9XE... Type M-3SEW 6 U...N9XE... 4/2 directional seat valve With a sandwich plate, the Plus-1 plate , under the 3/2 directional seat valve, the function of a 4/2 directional seat valve is achieved. Function of the Plus-1 plate: Initial position : The main valve is not operated. The spring (9) holds the ball (4) on the seat (11). Port P is blocked and A is connected to T. Apart from that, one control line is connected from A to the large area of the control spool (12), which is thus unloaded to the tank. The pressure applied via P now pushes the ball (13) onto the seat (14). Now, P is connected to B, and A to T. Transition position : Upon actuation of the main valve, the control spool (8) is shifted against the spring (9) and pre