Directional spool valve type WEH160 pages
OPOIMAR
nnnnwadowice
nnnnDirectional spool valve type WEH16
nnnnelectro-hydraulically operated
nnnnNS16
nnnnup to 35 MPa up to 240 dm3/min
nnnnWK
nnnn499 482
nnnn02.2011
nnnnDATA SHEET - SERVICE MANUAL
nnnnAPPLICATION
nnnnDirectional spool valves type WEH16... electro-
nnnnhydraulically operated are intended for change in
nnnndirection of fluid flow in a system and thus it allows
nnnnto change direction of movement of a receiver -
nnnnmostly piston rod of a cylinder or hydraulic motor as
nnnnwell to use functions: on and off. These directional
nnnnspool valves are used for subplate mounting in any
nnnnposition in a hydraulic system.
nnnnThe directional spool valve type WEH16... is complied
nnnnwith the regulations of directive 2006/95/WE for the
nnnnfollowing voltages:
nnnn•50-250 V for AC
nnnn•75-250 V for DC
nnnnDESCRIPTION OF OPERATION
nnnnH-4WEH16E72/G24NZ4
nnnn©0®
nnnnMain bore and annular ports P, T, A, B are made in the
nnnnhousing (1) and connected to its subplate connection.
nnnnDirectional valve is switched by shifting the spool (2)
nnnninto one end position. Various control functions are
nnnndependent on the spool (2) which affects the change in
nnnnconfiguration of connections among ports P, T, A, B in
nnnnthe housing (1). The spool (2) is shifted from its neutral
nnnnposition by affecting pressure of hydraulic fluid
nnnnsupplied via pilot valve (A) into one chamber of
nnnncaps (3). The pilot valve (A) - type WE6...12/...
nnnnaccording to data sheet WK 499 502 is operated by
nnnnmeans of solenoids (5). In case of failure, the pilot
nnnnH-4WEH16HE72/G24NZ4
nnnnV A VAV
nnnnA P B XY
nnnnvalve (A) may be shifted manually by means of manual
nnnnoverrides (6) - version ...4WEH16.../...N. The spool (2)
nnnnis centered in neutral position by means of springs (7) -
nnnnversions: ...4WEH16.../... or may be hydraulically
nnnnoperated by the fluid pressure from the pilot valve (A)
nnnn-version ...4WEH16H.../... - for 3-position directional
nnnnvalves the centering is possible by means of the sleeve
nnnn(8). Sealing of the directional valve to a subplate is
nnnnsecured by sealing rings. Sealing between mounting
nnnnsurface of the valve and subplate is assured by sealing
nnnnrings.
nnnnTypeWEH16
nnnnWK 499 482
nnnn02.2011
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