PRODUCT TYPE: Directional Hydraulic Valve
VALVE SIZE: 6mm/10mm, CETOP3/CETOP5
CONTROL METHOD: Spool type
APPLICATION Hydraulic Machines
CONNECTION TYPE: Subplate Connection
CONTROL METHOD: Hydraulic
PART NOS.: FT-WE Series
APPROXIMATE WEIGHT:Size6= 1.95Kgs/4.29Lbs; Size10= 5.90Kgs/12.98Lbs
Subplate: G341; G342; G502 Bottom Subplates
Solenoids(Coils): Valve Solenoids and Coils
– Individual connectors for AC or DC voltage
– High pressure and large flow rate design
– Lower oil leakage, high operation performance
Directional hydraulic valve uses single or double solenoid mounting on the side of valve house, the each side of valve is called A or B side, it can be readable from Finotek valve nameplate. The solenoid consists of coil, steel core, piston and plastic plug, which is activated by electric signal. The voltage of solenoid can be 12VDC, 24VDC and 110VAC, 220VAC optional, for most of manually operation machines, the direct current solenoid operated directional hydraulic valve is often used, lots of the valve are quipped in plastic molding machines, pressing machines in industry. The house of Finotek directional hydraulic valve is black galvanization as surface treatment to prevent rust, the solenoids can be zinc plated in shining color and dull color for optional.
The directional hydraulic valves manufactured by Finotek with good working reliability, the valve is reliably changing the hydraulic fluid direction when the solenoid(s) energized and on to its correct position when the solenoid(s) de-energized. The reliability mainly depends on valve design and manufacture processing, its important to minimize spool movement resistance on the valve spool and is the key test standard to determine whether a valve is high or low quality.
Directional Hydraulic Valve Inner Structure
The picture “A-1” above is the directional hydraulic valve diagram, in which, the main parts of the directional hydraulic valve is the valve housing and valve spool nos. 1 and nos. 4 . There is a cylindrical hole (Valve housing hole or spool hole, for short) in the middle of valve housing, the cylindrical valve spool is able to move axially within the bore.
The valve housing is produced with several annular undercut groove (The groove is manufactured by models as per the valve function and made from casting iron material), each undercut groove connects correspondingly to main oil ports (P, A, B, T) on the valve connection subplate surface.
1: Valve housing ｜ 2: Undercut groove ｜ 3: Spool shoulder 4: Spool ｜ 5: Main oil port
There are many several annular grooves cut and related shoulders on the spool as well, when the spool shoulder moves to cover the undercut groove of valve housing exactly, this connection chamber through fluid oil way is blocked (Off) at that moment.
When the oil connection chambers in closed position, the spool shoulder is not only covering the undercut groove of housing, but also covering flanking undercut groove of valve housing (Also called cover length).
When the shoulder is not covered undercut groove (Spool in open positIon), this will allow the oil through in its connection circuit, the axial length of the opening gap between the shoulder and undercut groove is called the opening length.
The number of undercut groove (The undercut grooves do not connects to main oil ports of P, A, B, T or special internal drain L port through undercut grooves are not counted) the number of shoulders directly affects to directional hydraulic valve function, valve operation performance, size and manufacturing processing
Valve Ordering Code
Example (Normal code): “FT-4WE6 E 6X/ EG24NZ5L” Explanation As Below:
(1) Producer code= FT
(2) Service ports= 4
Service ports= 3
(3) Size= 6
(4) Spool symbol= E,F,H, please see the spool symbol below
(5) Valve series: 6= 6X ; 10=3X
(6) No code= With spring return
O= Without spring return
F= Without spring return with detent
(7) E= (Wet-pin) Solenoid with detachable coil
(8) G24= DC voltage 24V
G12= DC voltage 12V
W220= AC voltage 220~230V 50/60 Hz
W110= AC voltage 110V 50/60 Hz
(9) N= With manual override
(10) Z5L= Plug-in connection with indicator lamp
(11) No code = Without Throttle insert
(12) No code = NBR seals for petroleum oil
V = FPM seals for phosphate ester
(13) No code = Black Galvanization
B= Blue Powder Coating
Valve Technical Information
Main Raw Materials: Casting Iron
Power: By hydraulic
Brand: Finotek or OEM
Max. Operation Pressure(T): 21Mpa
Max. Operating Pressure(P,A,B): 31.5Mpa
Max. Flow Rate: 60L/min. ; 120L/min.
Media Temperature: -30 to +80(°C)for NBR O-rings
Available Voltaege: DC:12V,24V ; AC:110V,220V
Voltage Tolerance: +10% to -15%
Switching Frequency: DC:15000Times/h; AC:7200Times/h
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
NG06 Valve Installation Dimensions
NG10 Valve Installation Dimensions