Directional spool valve type WEH160 pages

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OPOIMAR

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wadowice

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Directional spool valve type WEH16

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electro-hydraulically operated

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NS16

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up to 35 MPa up to 240 dm3/min

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WK

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499 482

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02.2011

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DATA SHEET - SERVICE MANUAL

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APPLICATION

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Directional spool valves type WEH16... electro-

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hydraulically operated are intended for change in

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direction of fluid flow in a system and thus it allows

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to change direction of movement of a receiver -

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mostly piston rod of a cylinder or hydraulic motor as

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well to use functions: on and off. These directional

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spool valves are used for subplate mounting in any

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position in a hydraulic system.

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The directional spool valve type WEH16... is complied

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with the regulations of directive 2006/95/WE for the

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following voltages:

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•50-250 V for AC

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•75-250 V for DC

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DESCRIPTION OF OPERATION

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H-4WEH16E72/G24NZ4

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©0®

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Main bore and annular ports P, T, A, B are made in the

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housing (1) and connected to its subplate connection.

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Directional valve is switched by shifting the spool (2)

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into one end position. Various control functions are

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dependent on the spool (2) which affects the change in

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configuration of connections among ports P, T, A, B in

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the housing (1). The spool (2) is shifted from its neutral

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position by affecting pressure of hydraulic fluid

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supplied via pilot valve (A) into one chamber of

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caps (3). The pilot valve (A) - type WE6...12/...

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according to data sheet WK 499 502 is operated by

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means of solenoids (5). In case of failure, the pilot

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H-4WEH16HE72/G24NZ4

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V A VAV

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A P B XY

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valve (A) may be shifted manually by means of manual

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overrides (6) - version ...4WEH16.../...N. The spool (2)

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is centered in neutral position by means of springs (7) -

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versions: ...4WEH16.../... or may be hydraulically

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operated by the fluid pressure from the pilot valve (A)

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-version ...4WEH16H.../... - for 3-position directional

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valves the centering is possible by means of the sleeve

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(8). Sealing of the directional valve to a subplate is

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secured by sealing rings. Sealing between mounting

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surface of the valve and subplate is assured by sealing

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rings.

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TypeWEH16

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WK 499 482

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02.2011

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