Created on 05/30/2016
c
2016 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 2
MODEL
DFFA8
2-way, poppet directional valve with integral T-8A control cavity - control 1-2
SERIES 4 / CAPACITY: 480 L/min. / CAVITY: T-18A
This valve is a 2-position, 2-way poppet cartridge that incorporates an integral pilot control cavity. It controls flow
from port 1 to port 2, exhibits extremely low leakage rates and will accept 5000 psi (350 bar) at both ports. Installing
a pilot solenoid cartridge in the T-8A cavity results in a high flow directional valve. Other pilot options include
manual, hydraulic and pneumatic pilot cartridges.
TECHNICAL 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
Pilot Control Cavity T-8A
Pilot Control Valve Installation Torque 27 - 33 Nm
Valve Hex Size 41,3 mm
Valve Installation Torque 474 - 508 Nm
Model Weight 0,50 kg
Seal kit - Cartridge Buna: 990-018-007
Seal kit - Cartridge EPDM: 990-018-014
Seal kit - Cartridge Polyurethane: 990-018-002
Seal kit - Cartridge Viton: 990-018-006
(D)CRACKING PRESSURE
D 50 psi (3,5 bar)
(N)SEAL MATERIAL
N Buna-N
E EPDM
V Viton
MATERIAL/COATING
Standard Material/Coating
/AP Stainless Steel, Passivated
snhy.com/
DFFA8
TECHNICAL FEATURES
Compound cartridge (pilot and main stage) assembly information is provided for reference only. Cartridges must be ordered separately and assembled at
point of use.
NOTES
Model Code Example: DFFA8DNCONFIGURATION OPTIONS
Created on 05/30/2016
c
2016 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 2 of 2
NOTE: The main stage valve should first be installed to the correct torque value followed by the T-8A pilot control section into the main stage valve to its required
torque value.
The -8 control option allows the pilot control valve to be incorporated directly into the end of the directional cartridge via the T-8A cavity. These pilot control
cartridges are sold separately and include solenoid operation, air pilot operation, and hydraulic pilot operation. See Pilot Control Cartridges.
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.
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
RELATED MODELS
DFFA 2-way, 2 stage, solenoid-operated directional poppet valve - flow 1-2
