Function and configurationsDirectional Valves with Mechanical and Manual Operation type WMM6...L6X, are direct operated spool valves which switch the flow fluid by rotating the handle to move the spoo...
Product Detail
Function and configurations
Directional Valves with Mechanical and Manual Operation type WMM6...L6X, are direct operated spool valves which switch the flow fluid by rotating the handle to move the spool axially. They have 2-position, 3-position as well as various spool symbols, optional detent or return spring. And they are sub-plate mounting.
Type WWM.../
It consists of housing (1), hand lever (2), control spool (3), one or two return springs (4) and push rod (5).
In the non-operated condition the control spool (3) is held in the neutral or starting position by the return springs (4). When the hand lever (2) is pushed to right or left, the hand lever (2) acts at the push rod (5) by hinge and direct controls the spool (3), at that time, the spool (3) moves to an expected position. When the handle returns to Zero position, spool returns to normal position by return spring. The switched position is operated by the hand lever.
Type WWM.../F
Their operating principle is basically same as the type WWM.../, and they are fitted with 2 or 3 switched positions and a detent, so all the switched positions are fixed.
Cartridge throttle
The use of a throttle insert is required, when, due to given operating conditions, flows can occur during the switching processes that exceed the performance limit of the valve.
These throttles are to be inserted into the P-channel of the directional valve.
Ordering code
Symbols
Technical data
| Fixing position | Optional | |
| Fluid temperature range ℃ | -30 to +80 (NBR seal) | |
| -20 to +80 (FKM seal) | ||
| Max.operating pressure | Port A,B,P bar | 315 |
| Port T bar | 160 | |
| Max.flow-rate L/min | 60 | |
| Flow cross section (switching neutral position) | Type Q m㎡ | For symbol Q 6% of nominal cross section |
| Type W m㎡ | For symbol W 3% of nominal cross section | |
| Fluid | Mineral oil for NBR and FKM seal | |
| Phosphate ester for FKM seal | ||
| Viscosity range m㎡/s | 2.8 to 500 | |
| Degree of contamination | Maximum permissible degree of fluid contamination: Class 9.NAS 1638 or 20/18/15, ISO4406 | |
| Weight kg | 1.6 | |
Characteristic curves (Measured at θoil=40℃±5℃, using HLPH)
| Spool symbol | Flow direction | |||
| PtoA | P toB | A toT | B toT | |
| AB | 3 | 3 | - | - |
| C | 1 | 1 | 3 | 1 |
| DY | 5 | 5 | 3 | 3 |
| E | 3 | 3 | 1 | 1 |
| F | 1 | 3 | 1 | 1 |
| T | 10 | 10 | 9 | 9 |
| H | 2 | 4 | 2 | 2 |
| JQ | 1 | 1 | 2 | 1 |
| L | 3 | 3 | 4 | 9 |
| M | 2 | 4 | 3 | 3 |
| P | 3 | 1 | 1 | 1 |
| R | 5 | 5 | 4 | - |
| V | 1 | 2 | 1 | 1 |
| W | 1 | 1 | 2 | 2 |
| U | 3 | 3 | 9 | 4 |
| G | 6 | 6 | 9 | 9 |
Operating limitations
The switching function of the valves depends on the filtration. To achieve the specified admissible flow values, we recommend full flow filtration with 25 µm. The flow forces acting within the valves also affect the flow performance. With 4 way valves the specified flow data thus apply to normal operation with 2 volume flow directions (e.g. from P to A and at the same time return flow from B to T) (see table).
If only one flow direction is available, in certain cases, the admissible flow can be significantly smaller (e.g. when using a 4 way valve as 3 way valve, due to blocked connection A or B).
Unit dimensions
