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DFFA8

2-way directional valve from Sun Hydraulics

Description

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.

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  • 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.

Technical Data

Note: Data may vary by configuration. See CONFIGURATION section.

Cavity T-18A
Series 4
Capacity 120 gpm
Capacity (metric) 480 L/min.
Maximum Operating Pressure 5000 psi
Maximum Operating Pressure (metric) 350 bar
Maximum Valve Leakage at 110 SUS (24 cSt) 10 drops/min.@5000 psi
Maximum Valve Leakage at 110 SUS (24 cSt) (metric) 0,7 cc/min.@350 bar
Pilot Control Cavity T-8A
Pilot Control Valve Installation Torque 20 – 25 lbf ft
Pilot Control Valve Installation Torque (metric) 27 – 33 Nm
Valve Hex Size 1 5/8 in.
Valve Hex Size (metric) 41,3 mm
Valve Installation Torque 350 – 375 lbf ft
Valve Installation Torque (metric) 474 – 508 Nm
Model Weight 1.10 lb
Model Weight (metric) 0,50 kg
Seal kit – Cartridge Viton: 990018006

Configuration Options

Cracking Pressure

D 50 psi (3,5 bar)

Seal Material

N Buna-N
V Viton
E EPDM

Material/Coating

/AP Stainless Steel, Passivated
Cavity: T-18A
Nominal Capacity: 120 gpm (480 lpm )
Downloads
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Possible variants

DFFA8DN,DFFA8DN/AP,DFFA8DV,DFFA8DV/AP,DFFA-8DN,DFFA-8DN/AP,DFFA-8DV,DFFA-8DV/AP

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