Function and configurationsDirectional valves type WMD... are mechanical, manual operated directional spool valves. They control the start, stop and direction of a flow.The rotary knob (2) operates (2...
Product Detail
Function and configurations
Directional valves type WMD... are mechanical, manual operated directional spool valves. They control the start, stop and direction of a flow.
The rotary knob (2) operates (2×90 °) the spool (1), the screw type rotation transforms into axial movement and direct acts on the spool (1). Then the spool (1) moves to the end position and gets the opening position as required.
Actual switch position of spool (1) can be controlled with rotary knob (2). All the switch positions can be orientated by locating device.
Throttle
The use of a throttle insert is required, when, operating, 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
| 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,Phosphate ester | |
| 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 | 1.5 | |
Characteristic curves (Measured at θ_oil=40°C ±5°C, using HL)
| Spool symbols | Flow direction | |||
| PtoA | P to B | Ato T | B to T | |
| 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
| Curve | Spool symbol |
| 1 | E,M,H,C,D,Y,Q,U,W |
| 2 | J,L |
| 4 | G,P |
| 8 | T |
| Curve | Spool symbol |
| 3 | A,B |
| 5 | F |
| 6 | V |
| 7 | R |
Unit dimensions
