 2025 Sun Hydraulics 1 of 2

MODEL

DFFJDFFJ

2-way, 2-stage, solenoid-operated directional poppet valve - flow

2-1 (740 Series)

SERIESSERIES 4 / 4 / CAPACITY:CAPACITY: 480 L/min. / 480 L/min. / CAVITY:CAVITY: T-18A T-18A

X-Control, C-Poppet X-Control, H-Poppet

D-Control, C-Poppet D-Control, H-Poppet

L-Control, C-Poppet L-Control, H-Poppet

M-Control, C-Poppet M-Control, H-Poppet

T-Control, C-Poppet T-Control, H-Poppet

NOTE: DATA MAY VARY BY CONFIGURATION. SEE CONFIGURATION SECTION.

This solenoid controlled, 2-way, 2-position cartridge is a pilot-operated, poppet style

directional valve with reverse free flow check. It is available in either a normally open or

normally closed configuration. Due to its poppet style construction, it has extremely low

leakage.

This valve is designed to be used with 740 and 747 Series coils.

TECHNICAL DATATECHNICAL DATA

Cavity T-18A

Series 4

Capacity 480 L/min.

Maximum Operating Pressure 350 bar

Maximum Valve Leakage at 110 SUS (24 cSt) 0,7 cc/min.@350 bar

Check Cracking Pressure 3,5 bar

Response Time - Typical 30 ms

Switching Frequency 15,000 max. cycles/hr

Solenoid Tube Diameter 16 mm

Valve Hex Size 41,3 mm

Valve Installation Torque 474 - 508 Nm

Seal kit - Cartridge Buna: 990018007

Seal kit - Cartridge EPDM: 990018014

Seal kit - Cartridge Viton: 990018006

Model Weight 1.25 kg.

sunhydraulics.com/model/

DFFJ

NOTESNOTES

Please verify cartridge clearance requirements when choosing a Sun manifold. Different valve controls and coils require

different clearances.

An additional 2.00 inches (50,8 mm) beyond the valve extension is needed for coil installation and removal.

 2025 Sun Hydraulics 2 of 2

(X)(X)CONTROLCONTROL

XX No Manual Override

DD Twist/Lock (Dual) Manual

Override

LL Twist/Lock (Detent) Manual

Override

MM Manual Override

TT Twist (Momentary) Manual

Override

(C)(C)POPPET CONFIGURATIONPOPPET CONFIGURATION

CC Normally Closed

HH Normally Open

(N)(N)SEAL MATERIALSEAL MATERIAL

NN Buna-N

EE EPDM

VV Viton

COIL *COIL *

No coil

* Additional coil options are available

TECHNICAL FEATURESTECHNICAL FEATURES

The solenoid tube assembly is fatigue rated for 5000 psi (350 bar) service.

Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids,

greases and lubricants will damage the seals.

All configurations of this valve include zinc-nickel plating as standard for 1000-hour salt fog protection.

Coil connector options offer ratings up to IP69K. See individual coil product pages for details.

This cartridge has an option for manual override. See the CONFIGURATION section.

Valves exhibit extremely low leakage rates; less than 10 drops/min. @ 5000 psi (0,7 cc/min @ 350 bar).

On models equipped with the D or L control, the detent mechanism in the manual override is meant for temporary actuation. The D,

L and T manual control assemblies have a mechanical life expectancy of approximately 7,000 cycles.

This valve utilizes a wet armature design. This means that the working fluid surrounds the armature and is exposed to the heat

generated by the coil. This can be a factor if the coil is energized for long periods of time. Some fluids, notably water/glycol mixtures,

break down at these temperatures over time and form varnishes that will affect the function of the cartridge.

A wide variety of coil termination and voltage options are available, with and without surge protection. See the CONFIGURATION

section.

The solenoid's unique magnetic design results in a high efficiency solenoid, yielding high spool actuating force per Watt expended,

leading to reliable valve shifting.

Coils can be mounted on the tube in either direction.

Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation

torque and/or cavity/cartridge machining variations.

PERFORMANCE CURVESPERFORMANCE CURVES

Model Code Example: DFFJXCNModel Code Example: DFFJXCNCONFIGURATION OPTIONSCONFIGURATION OPTIONS