4-way 3-position, 4-way 2-position and 3-way 2-position directional
valve with mechanical, manual operation
Type WMM16, 25 and 32
Features
- Direct operating directional spool valves with mechanical, manual
operation
- For sub-plates mounting
- Hand lever
- Porting pattern confirms to DIN 24 340 form A, and ISO 4401
Function and configurations
The type WMM valves are hand lever operation directional spool
valves. They control the start, stop and direction of a flow.
The directional valves basically comprise of a housing (1), hand
lever (2), control spool (3), as well as one or two return springs
(4).
In the unoperated condition the control spool (3) is held in the
neutral or its initial position by the return springs (4). The
control spool (3) is actuated by the hand lever (2) via a joint and
a pin. The spool is thereby moved out of its initial position into
switched position.
After the hand lever(2) has been returned to the zero switched
position , the spool (3) is returned to the neutral position via
the return springs (4).
4WMM.../F... (With the detent)
The directional valves with one detect , 2 or 3 switched position ,
can be orientated at any switched position.
Specifications
Symbols
Notes: For size 16, the port L should be used as drain port(X, Y
are not used), while for size 25 and 32, the port Y is used as
drain port(X, L are not used)
Technical data
| Nominal size | 16 | 25 | 32 |
| Weight | kg | Approx.8 | Approx.12.2 | Approx.49 |
| Actuation force –with spring return | N | Approx.75 | Approx.105 | Approx.170 |
| –with detent | N | Approx.75 | Approx.105 | Approx.170 |
| Actuation angle about the neutral postion | ° | 2×26° | 2×32° | 2×30° |
| Max.operating pressure port A,B,P | bar | 315 |
| Port T | bar | 250 |
| Fluid | Mineral oil suitable for NBR and FKM seal |
| Phosphate ester for FKM seal |
| Fluid temperature range | ℃ | -30 to +80 (NBR seal) |
| -20 to +80 (FKM seal) |
| Viscosity range | mm2/s | 2.8 to 380 |
| Degree of contamination | Maximum permissible degree of fluid contamination: Class 9. NAS
1638 or 20/18/15, ISO4406 |
Unit dimensions: nominal size 16
1 Switched position a
2 Switched position b
3 Switched position 0 (a and b for 2-position valve)
4 2-position and 3-position valves with detent, 3-position valve
with spring centered
5 2-position valve with return spring
6 Nameplate
7 2 locating pins 3x8
8 O-ring 22×2.5 (ports A, B, P and T )
O-ring 10×2 (port L )
It must be ordered separately, if connection plate is needed. Type:
G172/01, G172/02, G174/01 G174/02, G174/08
(Port X and Y unavailable, returning directly by port L)
Valve fixing screws:
Internal hexagon screw, GB/T 70.1-10.9,
4-M10×60 Tightening torque MA =75 Nm
2-M6×55 Tightening torque MA =15.5 Nm
must be ordered separately
Unit dimensions: nominal size 25
1 Switched position a
2 Switched position b
3 Switched position 0
4 O-ring 19×3 (ports X and Y )
5 O-ring 27×3 (ports A, B, P and T )
6 2 locating pings 6×12
7 Nameplate
Valve fixing screws:
Internal hexagon screw
GB/T 70.1-10.9, 6-M12×60
Tightening torque MA=130Nm
must be ordered separately
It must be ordered separately if connection plate is needed. Type:
G151/01(G1 ), G151/02 (M33×2)
G154/01(G1 ¼), G154/02 (M42×2)
G156/01(G1½) , G156/02(M48×2)
G154/08(Flange connection)
Unit dimensions: nominal size 32
1 Switched position a
2 Switched position b
3 Switched position 0
4 O-ring 19×3 (ports X and Y )
5 2 locating pins 6×12
6 O-ring 42×3 ports A, B, P and T )
7 Nameplate
It must be ordered separately
if connection plate is needed. Type:
G157/01(G1 1/2), G157/02 (M48×2)
G158/10 (Flange connection)
Valve fixing screws:
Internal hexagon screw
GB/T 70.1-10.9,
6-M20×80 Tightening torque MA =430 Nm
must be order separately
