4-way 3-position, 4-way 2-position and 3-way 2-position directional
valve with mechanical, manual operation
Type WH, WP6...L6X
Features
- Direct operated directional spool valve
- Operating methods:
• pneumatic (WP)
• hydraulic (WH)
- Sub-plate mounting
- Porting pattern to DIN 24 340 Form A, and ISO 4401
Function
WH and WP valves are fluidically operated directional spool valves.
They are used for the control of stop, start and direction of a
flow.
The directional valves mainly consist of housing (1), the control
spool (2), one or two return springs (3), cover (4). In the
non-operated condition, control spool (3) is held by return springs
(4) in the central or initial position (except for impulse spools).
Control spool (3) is shifted by the actuating elements to the
required spool position.
Without return spring, without detent, type..O/...
(Only for Spool Symbol A,C,D)
When actuating elements without return springs and without detent
are used, a defined spool position is not provided in the
on-operated condition.
With detent, type..OF/..
(Only for Spool Symbol A,C,D)
Directional valves with hydraulic or pneumatic actuation are also
available as 2-position valves with detent. When actuating elements
with detent are used, each spool position can be fixed.
Cartridge throttle
The use of a throttle insert is required when, due to the
prevailing operating conditions, flows can occur during the
switching process that are higher than permitted by the performance
limits of the valve. It is to be inserted in the P-channel of the
directional valve.
Type WH6...L6X ( three-position ) hydraulic directional valve With
return spring
Specifications
Symbols
Technical data
| Valve type | WP | WH | WHZ |
| Weight 1 operating cylinder | kg | 1.8 | 2 | 2.2 |
| 2 operating cylinder | kg | 2 | 2.2 | 2.4 |
| 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 |
| Min control pressure | bar | 4 | 6-10 |
| Max control pressure | bar | 10 | 200 |
| 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 |
| Control pressure | bar | Min.6 to 10 > tank pressure, Max.200 |
| 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 |
Unit dimensions (WH) (Dimensions in mm)
1 Used for 3-postition valve or
2-postition */O, */OF
2 Used for 2-postition *A or A,C,D
3 Used for 2-postition *B or B,Y
4 Name plate
5 Mounting surface
6 O-ring 9.25×1.78, with ports A, B, P, T
Valve mounting screws:
Internal hexagon screw,
M5×50 GB/T 70.1-10.9,
Tightening torque, MA =9Nm
It must be ordered separately
if connection plate is needed.Type:
G341/01(G1/4), G341/02 (M14×1.5)
G342/01(G3/8), G342/02 (M18×1.5)
G502/01(G1/2), G502/02 (M22×1.5)
Unit dimensions (WP,WPZ) (Dimensions in mm)
1 Valve with 2 switching positions and 2 operating cylinders
Valve with 3 switching positions and 2 operating cylinders
2 Operating cylinder "a"
3 Operating cylinder "b"
4 Cover for valve with 1 operating cylinder (2 switching positions)
5 Emergency operation, optional (only with type "WP")
6 O-ring 9.25×1.78 with ports A, B, P, T
7 Name plate
8 Mounting pattern
9 Connection WP
10 Connection WPZ
Valve mounting screws:
M5×50 GB/T 70.1-10.9, MA = 9 Nm.
It must be ordered separately
if connection plate is needed.Type:
G341/01(G1/4),G341/02 (M14×1.5)
G342/01(G3/8),G342/02(M18×1.5)
G502/01(G1/2),G502/02(M22×1.5)
