 2020 Sun Hydraulics 1 of 2

MODEL

DFDI

2-way, 2-stage, solenoid-operated directional poppet valve - flow 1-2 (740

Series)

SERIES 2 / CAPACITY: 120 L/min. / CAVITY: T-5A

(X)CONTROL

X No Manual Override

D Twist/Lock (Dual) Manual Override

L Twist/Lock (Detent) Manual Override

M Manual Override

T Twist (Momentary) Manual Override

(C)SPOOL CONFIGURATION

C Normally Closed

H Normally Open

(N)SEAL MATERIAL

N Buna-N

E EPDM

V Viton

COIL *

No coil

* Additional coil options are available

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 DATA

Cavity T-5A

Series 2

Capacity 120 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 28,6 mm

Valve Installation Torque 61 - 68 Nm

Seal kit - Cartridge Buna: 990203007

Seal kit - Cartridge EPDM: 990203014

Seal kit - Cartridge Viton: 990203006

Model Weight 0.39 kg.

sunhydraulics.com/model/

DFDI

NOTES

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.

Model Code Example: DFDIXCNCONFIGURATION OPTIONS

 2020 Sun Hydraulics 2 of 2

TECHNICAL FEATURES

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

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.

The valve assembly is fatigue rated for 5000-psi (350-bar) service.

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.

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 CURVES