Directional spool valves, pilot operated, with mechanical-hydraulic actuation (roller plunger) WMRH

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: Roller plunger 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 4WMMH … Valves of type WMRH are directional spool valves with mechanical-hydraulic actuation. They control the start, stop and direction of a flow. The directional valves basically consist 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 function of the valves corresponds to the function of valves of type WPH. The pilot control valve is, however, actuated mechanically. 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 Attention! The pilot oil supply may only be modified by authorized specialists or at the factory! – External pilot oil supply X or return Y : with NG10, version SO30 has to be used if sandwich plates are installed. The identification SO30 has to be used at the end of the type designation (sandwich plate). the maximum admissible operating parameters of the pilot control valve must be observed! maximum pilot pressure: please observe the Technical data! – Internal pilot oil supply (version “ET” and “E”): minimum pilot pressure: please observe the Technical data! to prevent inadmissibly high pressure peaks, a “B10” throttle insert must be provided in port P of the pilot control valve. Type code 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 WMRH / 6 / * 01 Up to 280 bar no code 02 3-way version 3 4-way version 4 Types of actuation 03 mechanical-hydraulic: Roller plunger WMRH Size 04 NG10 10 NG16 16 NG25 (type 4W.H 22 .7X/…) 22 NG25 (type 4W.H 25 .6X/…) 25 Size 32 32 Spool return in the main valve 05 By means of springs no code hydraulic 3) H 06 Symbols; for the possible version, see "Symbols/Circuit diagrams" Component series 07 40 to 49 – NG10 (40 to 49: unchanged installation and connection dimensions) 4X 60 to 69 – NG25 (4W.H 25.) and NG32 (60 to 69: unchanged installation and connection dimensions) 6X 70 to 79 – NG16 (from series 72) and NG25 (4W.H 22.) (70 to 79: unchanged installation and connection dimensions) 7X Spool return in the pilot control valve with 2 spool positions only possible with spools B, C, D and hydraulic control spool return in the main valve: 08 With spring return no code Pilot control valve 09 with mechanical, manual actuation 6