2-way cartridge клапаны, pressure Функции LFA..DBU2A

Description Size 16 … 100 Component series 6X, 7X Maximum operating pressure 420 bar Size 16 … 100 Component series 6X, 7X Product description General 2-way cartridge valves for pressure functions are pilot-operated valves in seat or spool design. The power section designed as cartridge valve (1) is installed into a receiving hole standardized according to DIN ISO 7368 and closed with a control cover (2). The pilot control valve (4) for manual or electrically proportional pressure adjustment is integrated into the control cover (2) or is installed on the control cover (2) as pilot valve with mounting dimensions according to DIN 24 340. By combination of cartridge valves with the control covers, different pressure functions can be realized. . Pressure relief function The cartridge valve (1) for the pressure relief function (type LC . DB...) is designed as seat valve without area difference (no effective area at port B). The effective pressure at port A is directed via the pilot oil supply orifice (5) to the spring side (6) of the element. Under the pressure set at the pilot control valve (4), the spool (3) is pressure-compensated and closed by the spring force. On reaching the set pressure, the spool (3) is opened and the pressure at port A is limited according to the pressure-flow characteristics. Pressure reducing function Rest position open The cartridge valve for the pressure reducing function is designed as spool valve without area difference (no effective areas at port B). As pilot control valve, identical cover types as for the pressure relief function are applied (type LFA..DB...). The effective pressure at port A is directed via the pilot oil supply orifice to the spring side of the spool. Under the performance limit and the pressure set at the pilot control valve, the spool is pressure-compensated and retained in open position by the spring force to enable free flow from port B to port A. On reaching the set pressure, the spool is closed and the pressure at port A is reduced according to the pressure-flow characteristics. Size Pilot control valve manual pressure adjustment 16 to 32 40 to 63 80 and 100 • • • with directional valve • = available Position "a" Position "b" Position "a" Position "0" Position "b" 2 pressure ratings • • 4WE6H... DBmax function open DB1 function • 4WE10H... • • 4WE6D... DB1 function • 4WE10D... open Circulation circuit blocked Cartridge valve is hydraulically blocked DB function Pressure relief function Type code 01 02 03 04 05 06 07 08 LFA DBU2A ‒ / Type 01 Control cover LFA LFA Size 02 NG 16 16 NG 25 25 NG 32 63 NG 40 40 NG 50 50 NG 63 63 NG 80 80 NG 100 100 Version 03 With 2 manual pressure adjustments, electrical selection de-energized - DB1 (4WE.. D) normally open (4WE.. H) DBU2A 1) Adjustment type for pressure adjustment (specification only for DB1) 04 Rotary knob 1 Sleeve with hexagon and protective cap 2 Lockable rotary knob with scale (H-locking according to automotive standard) 3 Rotary knob with scale