Предохранительный блок насоса DBA, DBAW…1X

Description Size 32, 40 Component series 1X Maximum operating pressure 350 bar Maximum flow 650 l/min Features Zero-pressure start-up and circulation of the pump For direct mounting to the SAE pressure port of the pump Quick pressure build-up Solenoid-actuated unloading via a built-on directional valve Integrated check valve, optional Switching shock damping, optional CE conformity according to the Low-Voltage Directive 2014/35/EU for electrical voltages >50 VAC or >75VDC Solenoid coil as approved component with UR marking according to UL 906, edition 1982, optional Product description Pump safety blocks of types DBA/DBAW are pilot-operated pressure relief valves which are integrated into a block and intended to be mounted directly onto the SAE pressure port of pumps. They are used for limiting (DBA) or limiting and magnetically unloading (DBAW) the operating pressure. Pump safety blocks (DBA) basically consist of a valve block (1), main spool insert (3) and pilot control valve (2) with adjustment type for pressure adjustment. The valve housing has a port P for the hydraulic fluid input and port P1 for the output. In a branch of the through-bore between these two ports there is the main spool insert. When this is open there is a connection to port T (tank line). Pump safety block type DBA The pressure applied in the through-bore acts on the main spool (3). At the same time, pressure is applied to the spring-loaded side of the main spool (3) and to the ball (8) in the pilot control valve (2) via the control lines (6) and (7) which are equipped with nozzles (4) and (5). If the pressure in the through-bore exceeds the value set at spring (9), ball (8) opens against spring (9). The signal for this is provided internally from the through-bore via control lines (10) and (6). The hydraulic fluid on the spring-loaded side of main spool (3) now flows via the control line (7), nozzle bore (11) and ball (8) into the spring chamber (12). From here, it is fed into the tank, either internally for type DBA…– via control line (13), or externally for type DBA…Y via control line (14). Nozzles (4) and (5) cause a pressure drop to occur at the main spool (3), hence the connection from channel P to channel T opens. The hydraulic fluid now flows from channel P to channel T, whilst the set operating pressure is maintained. Pump safety block type DBAR (with check valve) The integrated check valve maintains the system pressure when the pump is disconnected and prevents the hydraulic fluid from returning to the pump. If this valve is selected, no separate check valve is needed. Pump safety block type DBAW In addition, it can be switched from the pressure limiting function to depressurized circulation by controlling the built-on directional valve (15). Thus, a depressurized start-up of the pump is possible. Pump safety block with switching shock damping (sandwich plate) Version "S6E…R12" and "S6SM…B12" The opening of the connection from B2 to B1 or P2 to P1 is delayed by m