PRODUCT TYPE: 4WH16, Pilot Operated Hydraulic Directional Spool Valve
VALVE SIZE: 16mm, CETOP3/CETOP5
CONTROL METHOD: Spool type
APPLICATION Hydraulic Machines
CONNECTION TYPE: Subplate Connection
CONTROL METHOD: Hydraulic
PART NOS.: FT-WH Series
Solenoid Valve: Directional Hydraulic Solenoid Valve
Sandwich Check Valve: Pilot Operated Check Valve
Sandwich Flow Valve: Throttle Flow Valve
Solenoids(Coils): Valve Solenoids and Coils
– Direct operated spool hydraulic control
– Conforms to DIN, ISO, CETOP porting
– Subplate mounting installation
4WH16 Hydraulic directional spool valve operation function reply on the spool structure and spool position. There are three spool position of WH series:
Ordering code of WH means: the spool maintain in the central or initial position when there is no pressure in side the valve house.
Ordering code of WH /O means: there is no spring and locating device inside the valve, the spool is mounted with control plungers. The spool position is fixing if there is no pressure in the tunnel of valve house.
The code WH /OF means: there is no spring, one locating device inside the valve, the spool is mounted with control plungers. The spool position is fixing if there is no pressure in the tunnel of valve house. Please inform us before ordering the WH series for the spool different position.
4WH16 Hydraulic directional spool valve controls the fluid by a spool position and the spool is powered by hydraulic oil. There is a reducing valve can be mounted if the operated pressure above 250bar. We produce the spool by precisely CNC grinding machine keeping the spool concentricity and outside dimensions precision, it is stable of working and lower hydraulic switching shock.
Valve Ordering Code
Example (Normal code): “FT – 4WH 16 E – 50 ”
Explanation As Below:
(1) Producer code= FT
(2) No code= 280bar
(3) Size= 16
(4) No code= Spool return by springs
H= Spool return by hydraulic
(5) Spool symbol= E,G,F, please see the spool symbol form
(6) Series no.= 20 for Size 10
50= 50 for Size 16, 25, 32
(7) No code= Without switching adjustment
S= With meter-in control adjustment
S2= With meter-out control adjustment
(8) No code = NBR seals
V = FKM seals
(9) No code = Black Galvanization
B= Blue Powder Coating
Valve Technical Information
Main Raw Materials: Casting Iron
Power: By hydraulic
Brand: Finotek or OEM
Max. Control Pressure: 25Mpa
Max. Flow Rate: 300L/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
Pilot Oil Supply Conversion
INTERNAL & EXTERNAL SUPPLY CONVERSION
External supply: Remove the valve cover, convert the pin smaller head towards to main valve.
Internal supply: Rated the pin 180 degree, when the pin smaller head in opposite direction of external supply.
INTERNAL & EXTERNAL DRAIN CONVERSION
External drain: Remove the nut (On “1” location) and screw in the M6 plug
Internal: Screw out the M6 plug