4-way 3-position, 4-way 2-position and 3-way 2-position directional
valve with mechanical, manual operation
Type WMD6...L6X
Features
- Direct operated directional spool valve
- Sub-plate mounting
- Rotary knob with or without lock
45 versions standard spool
- Porting pattern confirms to DIN 24 340 form A and ISO 4401
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.
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 | mm2 | for symbol Q 6% of nominal cross section |
| Type W | mm2 | for symbol W 3% of nominal cross section |
| Fluid | Mineral oil, Phosphate ester |
| Viscosity range | mm2/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 |
Unit dimensions (Dimensions in mm)
1 Switched position b → a,o → a
2 Switched position a → b,a → o,b → o
3 Switched position o → b
4 3-position valve(including spool *A and *B):
Switched position b
Operating valve 90° clockwise and 90° anti-clockwise
2-position valve(spool A,C,D):
Switched position b . Operating valve 90° clockwise
5 Nameplate
6 Fixing surface
7 O-ring 9.25×1.78 for ports A, B, P and T
Valve fixing screws:
Internal hexagon screw
M5×50 GB/T 70.1-10.9
Tightening torque MA =9Nm
must be ordered separately
