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4-way, 3-position, solenoid-operated directional spool valve
Cavity: T-31A | Capacity:
See CAD Files tab below to request images.
Technical specifications
This direct acting, solenoid-operated, 4-way, 3-position spool valve is spring centered to the neutral position. When coil A is energized, the flow is from port 3 (P) to port 2 (A) and from port 4 (B) to port 1 (T). When coil B is energized, the flow is from port 3 to port 4 and from port 2 to port 1.
- The solenoid tube assembly is fatigue rated for 5000 psi (350 bar) service.
- This valve is direct actuated and requires no minimum hydraulic pressure for operation.
- In differential flow circuits, the higher return flow should be directed through port 2 (A) to port 1 (T).
- 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.
- 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.
- Cavity
- Series
- Capacity5 gpm
- Maximum Operating Pressure5000 psi
- Maximum Valve Leakage at 110 SUS (24 cSt)10 in³/min.@3000 psi
- Response Time - Typical50 ms
- Switching Frequency15,000 max. cycles/hr
- Solenoid Tube Diameter.75 in.
- Valve Hex Size7/8 in.
- Valve Installation Torque30 - 35 lbf ft
- Seal and nut kit - Coil
- Seal kit - Cartridge
- Seal kit - Cartridge
- Seal kit - Cartridge
What parts of the Sun cartridge valve are field serviceable?
How big is a drop of hydraulic oil?
Direct acting or pilot operated - what do I use?
- 991057 T-31A cavity, weatherized coil seal kit
- The two coils used in this assembly are interchangeable with one another, but once installed and wired, the coil closest to the hex body is considered Coil A, and the coil closest to the coil nut is Coil B.
Highlights
Technical Tips
Technical Information