4-way 3-position, 4-way 2-position and 3-way 2-position directional valve with mechanical, manual operation
Type WHD,WN,WP10...L3X
Features
- Direct operated directional spool valve
- Types of actuation:
• Pneumatic (WP, WPZ)
• Hydraulic (WH, WHZ)
- Sub-plate mounting
- Porting pattern to DIN 24 340 Form A, and ISO 4401
Function
Valves of type WP and WH are directional spool valves with fluid logics actuation. They control the start, stop and direction of a flow.
The directional valves basically consist of housing (1), one or two actuation elements (2) (hydraulic, pneumatic actuation cylinder), one or two return springs (3) and control piston (4).
Type WHD.../
In the initial state, the main spool(2) remain in the intermediary civilian under the action of two return springs(3), into the external model oil through the a port into the oil to promote the left of the piston(4) to the right, remove the
signal Oil, the main spool(2) back to the middle position under the right spring force back to the middle position. If external oil from the b port, the oil push the right side of the piston (4) left, thus driving the main spool (2) left, remove the signal oil, the main spool (2) back to the middle position under the left spring force.
Without spring return, Type ..O/..
(Only for Spool Symbol A,C,D)
If using actuation elements without return springs and without detent, a defined spool position is not given in the de-energized condition.
Without spring return with detent,
Type ..OF/.. (Only for Spool Symbol A,C,D)
Directional valves with hydraulic or pneumatic actuation are also available as 2-spool position valve with detent. If using actuation elements with detent, every spool position can be locked.
Cartridge throttle
The use of a throttle insert is required when due to prevailing operating conditions, flows can occur during the switching processes, which exceed the performance limit of the valve. It is inserted in channel P of the directional valve.
Specifications
Symbols
Technical data
| Valve type | WN | WP | WHD |
| Weight 1 operating cylinder | kg | 3 | 3 | 3 |
| 2 operating cylinder | kg | 3.3 | 3.3 | 3.3 |
| 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 | 120 |
| Flow cross section (switching neutral position) | Type V | mm2 | For type V 11(A/B to T) 10.3(P to A/B) |
| Type W | mm2 | For type W 2.5(A/B to T) |
| Type Q | mm2 | For type Q 5.5(A/B to T) |
| Control pressure | bar | 1.5～0.6 | 4.5～120 | 50～160 |
| 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 (WHD) (Dimensions in mm)
1 Used for 3-postition valve or,
2-postition */O, */OF
2 Used for 2-postition valve B, Y, EB...
3 Name plate
4 2-postition valve A, C, D, EA...
5 Valve with a actuator (2-position valve)
6 O-ring 12×2 , with ports A, B, P, T
7 Port TB used for special manifold
Valve mounting screws:
Internal hexagon screw
M6×40 GB/T 70.1-10.9,
Tightening torque MA =15.5Nm
It must be ordered separately, if connection plate is needed. Type:
G 66/01 (G 3/8), G 66/02(M18×1.5)
G 67/01 (G 1/2), G 67/02(M22×1.5)
G 534/01 (G 3/4), G 534/02(M27×2)
Unit dimensions (WN, WP) (Dimensions in mm)
1 2-position valves
symbols B, Y, EB...
2 2-position valves
symbols A, C, D, EA...
3 3-position valves
4 Cover for valves with one operating element
(2-position valve)
5 Name plate
6 O-ring 12×2
7 The additional T connection (TB) can also be optionally used in special manifold blocks.
8 Porting pattern
9 Pilot port
Valve mounting screws:
Internal hexagon screw, M6×40 GB/T 70.1-10.9,
Tightening torque, MA =15.5Nm
It must be ordered separately, if connection plate is needed. Type:
G 66/01 (G 3/8), G 66/02(M18×1.5)
G 67/01 (G 1/2), G 67/02(M22×1.5)
G 534/01 (G 3/4), G 534/02(M27×2)
Product Tags:
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Directional valve with mechanical, manual operation Type WHD,WN,WP10...L3X Images
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