PRODUCT TYPE: 4WMM Handle Operated Directional Spool Valve
VALVE SIZE: 16mm / 26mm / 32mm
CONTROL METHOD: Spool type
APPLICATION Hydraulic Machines
CONNECTION TYPE: Subplate Connection
CONTROL METHOD: Hand Lever Operated
PART NOS.: FT-WMM Series
APPROXIMATE WEIGHT:8.00Kgs/17.60Lbs(4WMM16) ; 12.2Kgs/26.84Lbs(4WMM25) ; 49Kgs/107.8Lbs (4WMM32)
– For large flow rate hydraulic systems
– With spring or detent option
– Reliable manual level hydraulic control operation
Manual directional control valve is porting size of 16mm/25mm/32mm, max. flow rate up to 300L/min. /450 L/min. /1100L/min., the order code is FT- 4WMM16/ 25 /32 series. This valve is operated by a long steel level to control the spool movement position, there are many spool symbols for different working purpose, normal used spools are E, J, G, H types.
Finotek manufactures the valve in small inner leakage(Inner leakage: from high pressure chamber to low pressure chamber in valve housing oil flow leakage). Large leakage is not only lower the working efficiency, but also rise oil temperature to overheat and affects other actuator normal working. Finotek controls the inner leakage by advance parts’ manufacturing precision and select high quality raw materials.
The WMM valve is a handle operated directional spool valve that controls the opening, stopping and reversing of the fluid flow.The directional control valve mainly consists of a valve house (1), a handle (2), a control spool (3) and one or two return springs (4).
In the operating state, the control spool (3) is held in the neutral or initial position by the return spring (4). The control spool (3) is driven by the handle (2). It acts directly on the control spool (3) via a joint and a pin. The control spool (3) therefore moves from the original position to the desired switching position.
After the handle (2) returns to the zero switching position, the control spool (3) is pushed back to its neutral position by the return spring (4).
4WMM. A / F. Type 1 (with positioning mechanism) This type of 2 or 3 switching positions and directional control slide valve with 1 positioning mechanism can be positioned in all switching positions.
Valve Ordering Code
Example (Normal code): “FT-4WMM16E -50 / ”
Explanation As Below:
|FT-||4||WMM||16 / 25 / 32||E||–||50|
(1) Producer code= FT
(2) Service ports= 4
Service ports= 3
(3) Size= 16 / 25 /32
(4) Spool symbol= E,F,G, please see the spool symbols below
(5) Valve series
(6) No code = With spring return, without detent
F = With detent, without spring return
(7) No code = Without Throttle insert
(8) No code = NBR seals for petroleum oil
V = FPM seals for phosphate ester
(9) No code = Black Galvanization
B= Blue Powder Coating
4WMM Valve Technical Information
Main Raw Materials: Casting Iron
Power: By hydraulic
Brand: Finotek or OEM
Max. Operation Pressure(T): 25Mpa
Max. Operating Pressure(P,A,B): 31.5Mpa
Max. Flow Rate: 300L/min. / 450L/min. / 1100L/min.
Media Temperature: -30 to +80(°C)for NBR O-rings
Oil Medium: Mineral oil as per DIN51 524, VDMA 24 568 or rapeseed oil, Viscosity 10 – 400 CST
Recommended Medium Filtration: ISO 4406 Standard, cleanliness class:20/18/15
Valve Spool Symbols
4WMM16 Valve Installation Dimensions
4WMM25 Valve Installation Dimensions
4WMM32 Valve Installation Dimensions