Распределители золотниковые, пилотного управления, с гидравлическим управлением WHH

Description Size 10, 16, 25 (4W.H22), 25 (4W.H25), 32 Component series 4X, 7X, 6X Maximum operating pressure 280 bar Maximum flow 1100 l/min Features Type of actuation: hydraulic-hydraulic For subplate mounting Porting pattern according to ISO 4401 Subplates according to data sheets 45054 to 45060 (separate order) Spring centering, spring end position or hydraulic end position Optional auxiliary operating device Switching time adjustment, optional Preload valve in channel P of the main valve, optional Stroke setting at main spool, optional Stroke setting and/or end position control, optional Inductive position switch and proximity sensors (contactless) Product description Type 4WPH … Valve type WHH is a directional spool valve with hydraulic actuation. It controls the start, stop and direction of a flow. The directional valve basically consists of the main valve with housing (1), the main control spool (2), one or two return springs (3.1) and (3.2), as well as the pilot control valve (4). The main control spool (2) in the main valve is held in the zero or initial position by the springs or by means of pressurization. In the initial position, the two spring chambers (5) and (7) are connected with the tank in a depressurized form via the pilot control valve (4). The pilot control valve (4) is supplied with pilot oil via the control line (6). Supply can be implemented internally or externally (externally via port X). Upon actuation of the pilot control valve, e. g. side "a", the pilot spool (8) is moved to the left and thus, the spring chamber (7) is pressurized with pilot pressure. The spring chamber (5) remains depressurized. The pilot pressure acts on the left side of the main control spool (2) and moves it against the spring (3.1). This connects port P with B and A with T in the main valve. When de-energized, the control spool (8) is held in the central position or in the initial position by the return springs (9) (except impulse spool). The spring chamber (7) is unloaded to the tank. The pilot oil from the spring chamber is displaced into channel Y via the pilot control valve (4). The pilot oil supply and return are implemented internally or externally (externally via port Y). Notice! The return springs (3.1) and (3.2) in the spring chambers (5) and (7) hold the main control spool (2) in central position without pilot pressure even with, for example, vertical valve positioning. Pilot oil supply NG10 Pilot oil supply NG16 Pilot oil supply NG25 (type 4W.H 22 .7X/…) Pilot oil supply NG25 (type 4W.H 25 .6X/…) Pilot oil supply Size 32 Pilot oil supply Pilot oil return External 2 closed External 1 closed Internal 2 open Internal 1 open Type 4W.H… The pilot oil supply is implemented externally - via channel X - from a separate circuit. The pilot oil return is implemented externally via the Y channel into the tank. Type 4W.H…E… The pilot oil supply is implemented internally from channel P of the main valve. (see Technical data) The pilot oil return is