 2018 Sun Hydraulics Corporation 1 of 2

MODEL

DFFA

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

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

(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)POPPET CONFIGURATION

C Normally Closed

H Normally Open

(N)SEAL MATERIAL

N Buna-N

E EPDM

V Viton

COIL *

No coil

212 DIN 43650-Form A, 12 VDC

224 DIN 43650-Form A, 24 VDC

712 Twin Lead, 12 VDC

724 Twin Lead, 24 VDC

912 Deutsch DT04-2P, 12 VDC

924 Deutsch DT04-2P, 24 VDC

* 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.

TECHNICAL DATA

Cavity T-18A

Series 4

Capacity 480 L/min.

Maximum Operating Pressure 350 bar

Response Time - Typical 30 ms

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

Check Cracking Pressure 3,5 bar

Switching Frequency 15,000 max. cycles/hr

Solenoid Tube Diameter 19 mm

Valve Hex Size 41,3 mm

Valve Installation Torque 474 - 508 Nm

Seal kit - Cartridge Buna: 990018007

Seal kit - Cartridge Viton: 990018006

Model Weight 1.14 kg.

snhy.com/

DFFA

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: DFFAXCNCONFIGURATION OPTIONS

 2018 Sun Hydraulics Corporation 2 of 2

TECHNICAL FEATURES

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

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

assembly has a mechanical life expectancy of approximately 7,000 cycles.

This cartridge has several manual override choices, including no manual override. See the CONFIGURATION section. Please note: Manual override functionality is

not compatible with weatherized coils.

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 are interchangeable with other Sun Series 1 solenoid products and can be mounted on the tube in either direction.

Coil connector options offer ratings up to IP69K. See individual coil product pages for details. Additional weatherized coils and kits are available for more complete

environmental protection.

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

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