4-way, 3-position, pilot-to-shift directional valve

Capacity: 50 - 200 gpm200 - 760 L/min. | Cavity: T-64A
DCFC : 4-way, 3-position, pilot-to-shift directional valve
Technical Features [ + ]

Three-position, 4-way directional cartridges are spring-centered, 6-port directional valves that can be configured from a choice of spool options. The supply port is port 3 and all ports will accept 5000 psi (350 bar). Capacity for these pilot-to-shift valves is dependent on the spool type specified.

  • All ports will accept 5000 psi (350 bar), including the x and y pilot ports (port 5 and port 6).
  • The reason for the different capacities, or performance limits, for the different spool configurations are flow forces. Flow forces are proportional to flow and pressure drop. Typically, they resist the opening of a passage. Spool configurations that open passages as they spring center are the most susceptible. If the flow forces due to the flow and pressure conditions exceed the centering spring force the valve may not shift completely. Higher flows may be used at lower pressures.
  • Leakage listed in technical data is for each path.
  • The pilot ports, 5 and 6, are positively sealed from the work ports.
  • 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.
  • Hardened spool and sleeve provide consistent and low spool leakage rates and excellent wear characteristics.
  • 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-64A
Series 4
Capacity 50 - 200 gpm200 - 760 L/min.
Maximum Operating Pressure 5000 psi350 bar
Minimum Pilot Pressure Required to Shift Valve 125 psi9 bar
Maximum Valve Leakage at 110 SUS (24 cSt) 2 in³/min.@1000 psi30 cc/min.@70 bar
Pilot Volume Displacement .42 in³6,9 cc
Valve Hex Size 1 5/8 in.41,3 mm
Valve Installation Torque 350 - 375 lbf ft474 - 508 Nm
Model Weight 3.80 lb1,75 kg
Seal kit - Cartridge Buna: 990064007
Seal kit - Cartridge EPDM: 990064014
Seal kit - Cartridge Polyurethane: 990064002
Seal kit - Cartridge Viton: 990064006
Performance Curves [ + ]
FAQs [ + ]

There are exactly 250 Sun drops in a cubic inch or 15 in a cc.

Direct-acting valves are used to prevent over pressure, and pilot-operated valves are used to regulate pressure. If you are unsure, use a direct-acting valve. Sun's direct acting valves are very fast, dirt tolerant, stable, and robust. Sun's pilot-operated valves are moderately fast, they have a low pressure rise vs. flow curve, and they are easy to adjust.

Only external seals are serviceable.  Sun offers replacement seal kits for all cartridge models. The applicable kit part number can be found in the product page's Technical Data table or by using our Cartridge Seal Kit search function located under Accessories. Please note: Converting the external seals from one material to another does not ensure fluid compatibility with that material due to the existence of internal seals within the cartridge.
Additional Resources [ + ]